./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety/test-0237.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_a7891013-185b-4c2a-a6ad-7898d83d81cd/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7891013-185b-4c2a-a6ad-7898d83d81cd/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_a7891013-185b-4c2a-a6ad-7898d83d81cd/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7891013-185b-4c2a-a6ad-7898d83d81cd/bin/utaipan-gh47qXpMRh/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety/test-0237.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7891013-185b-4c2a-a6ad-7898d83d81cd/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_a7891013-185b-4c2a-a6ad-7898d83d81cd/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 59c31190ccc8063bc9e40e87ef868627685497d396c28c826c00fa8abad7dfea --- 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 08:59:04,178 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 08:59:04,180 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 08:59:04,200 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 08:59:04,201 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 08:59:04,202 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 08:59:04,203 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 08:59:04,205 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 08:59:04,206 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 08:59:04,207 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 08:59:04,208 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 08:59:04,209 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 08:59:04,210 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 08:59:04,211 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 08:59:04,212 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 08:59:04,213 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 08:59:04,214 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 08:59:04,215 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 08:59:04,217 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 08:59:04,219 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 08:59:04,220 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 08:59:04,221 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 08:59:04,222 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 08:59:04,223 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 08:59:04,227 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 08:59:04,227 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 08:59:04,227 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 08:59:04,228 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 08:59:04,229 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 08:59:04,230 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 08:59:04,230 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 08:59:04,231 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 08:59:04,231 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 08:59:04,232 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 08:59:04,233 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 08:59:04,233 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 08:59:04,234 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 08:59:04,234 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 08:59:04,234 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 08:59:04,235 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 08:59:04,236 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 08:59:04,237 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7891013-185b-4c2a-a6ad-7898d83d81cd/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-12-14 08:59:04,259 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 08:59:04,260 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 08:59:04,260 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 08:59:04,260 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 08:59:04,261 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 08:59:04,261 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 08:59:04,261 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 08:59:04,261 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 08:59:04,262 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 08:59:04,262 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 08:59:04,262 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 08:59:04,262 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 08:59:04,262 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 08:59:04,262 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 08:59:04,263 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 08:59:04,263 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 08:59:04,263 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 08:59:04,263 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 08:59:04,264 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-14 08:59:04,264 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-14 08:59:04,264 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 08:59:04,264 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 08:59:04,265 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-14 08:59:04,265 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 08:59:04,265 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 08:59:04,265 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 08:59:04,265 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-14 08:59:04,266 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-14 08:59:04,266 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-14 08:59:04,266 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 08:59:04,266 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-14 08:59:04,266 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 08:59:04,266 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 08:59:04,267 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 08:59:04,267 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 08:59:04,267 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 08:59:04,267 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 08:59:04,267 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 08:59:04,268 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 08:59:04,268 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 08:59:04,268 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 08:59:04,268 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 08:59:04,268 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_a7891013-185b-4c2a-a6ad-7898d83d81cd/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7891013-185b-4c2a-a6ad-7898d83d81cd/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 59c31190ccc8063bc9e40e87ef868627685497d396c28c826c00fa8abad7dfea [2022-12-14 08:59:04,440 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 08:59:04,461 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 08:59:04,463 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 08:59:04,464 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 08:59:04,465 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 08:59:04,466 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7891013-185b-4c2a-a6ad-7898d83d81cd/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/memsafety/test-0237.i [2022-12-14 08:59:07,094 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 08:59:07,296 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 08:59:07,297 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7891013-185b-4c2a-a6ad-7898d83d81cd/sv-benchmarks/c/memsafety/test-0237.i [2022-12-14 08:59:07,309 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7891013-185b-4c2a-a6ad-7898d83d81cd/bin/utaipan-gh47qXpMRh/data/410d46055/30b07962bb014f74b91a9eff91bd9da1/FLAGfa43c3fd3 [2022-12-14 08:59:07,322 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7891013-185b-4c2a-a6ad-7898d83d81cd/bin/utaipan-gh47qXpMRh/data/410d46055/30b07962bb014f74b91a9eff91bd9da1 [2022-12-14 08:59:07,325 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 08:59:07,326 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 08:59:07,327 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 08:59:07,327 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 08:59:07,332 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 08:59:07,332 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 08:59:07" (1/1) ... [2022-12-14 08:59:07,333 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@65629807 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:59:07, skipping insertion in model container [2022-12-14 08:59:07,334 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 08:59:07" (1/1) ... [2022-12-14 08:59:07,341 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 08:59:07,376 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 08:59:07,656 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 08:59:07,665 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 08:59:07,708 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 08:59:07,735 INFO L208 MainTranslator]: Completed translation [2022-12-14 08:59:07,736 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:59:07 WrapperNode [2022-12-14 08:59:07,736 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 08:59:07,737 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 08:59:07,737 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 08:59:07,737 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 08:59:07,742 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:59:07" (1/1) ... [2022-12-14 08:59:07,758 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:59:07" (1/1) ... [2022-12-14 08:59:07,784 INFO L138 Inliner]: procedures = 188, calls = 66, calls flagged for inlining = 14, calls inlined = 14, statements flattened = 212 [2022-12-14 08:59:07,784 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 08:59:07,785 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 08:59:07,785 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 08:59:07,785 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 08:59:07,792 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:59:07" (1/1) ... [2022-12-14 08:59:07,792 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:59:07" (1/1) ... [2022-12-14 08:59:07,796 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:59:07" (1/1) ... [2022-12-14 08:59:07,797 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:59:07" (1/1) ... [2022-12-14 08:59:07,807 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:59:07" (1/1) ... [2022-12-14 08:59:07,812 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:59:07" (1/1) ... [2022-12-14 08:59:07,814 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:59:07" (1/1) ... [2022-12-14 08:59:07,816 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:59:07" (1/1) ... [2022-12-14 08:59:07,819 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 08:59:07,819 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 08:59:07,820 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 08:59:07,820 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 08:59:07,820 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:59:07" (1/1) ... [2022-12-14 08:59:07,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 08:59:07,833 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7891013-185b-4c2a-a6ad-7898d83d81cd/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:59:07,843 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7891013-185b-4c2a-a6ad-7898d83d81cd/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 08:59:07,844 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7891013-185b-4c2a-a6ad-7898d83d81cd/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 08:59:07,877 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-14 08:59:07,877 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 08:59:07,878 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-12-14 08:59:07,878 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-12-14 08:59:07,878 INFO L130 BoogieDeclarations]: Found specification of procedure zalloc_or_die [2022-12-14 08:59:07,878 INFO L138 BoogieDeclarations]: Found implementation of procedure zalloc_or_die [2022-12-14 08:59:07,878 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 08:59:07,878 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-12-14 08:59:07,878 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 08:59:07,878 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 08:59:07,879 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 08:59:07,974 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 08:59:07,976 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 08:59:08,399 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 08:59:08,456 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 08:59:08,457 INFO L300 CfgBuilder]: Removed 10 assume(true) statements. [2022-12-14 08:59:08,459 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 08:59:08 BoogieIcfgContainer [2022-12-14 08:59:08,459 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 08:59:08,462 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 08:59:08,462 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 08:59:08,466 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 08:59:08,466 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 08:59:07" (1/3) ... [2022-12-14 08:59:08,467 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50c0bb43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 08:59:08, skipping insertion in model container [2022-12-14 08:59:08,467 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:59:07" (2/3) ... [2022-12-14 08:59:08,467 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50c0bb43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 08:59:08, skipping insertion in model container [2022-12-14 08:59:08,467 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 08:59:08" (3/3) ... [2022-12-14 08:59:08,469 INFO L112 eAbstractionObserver]: Analyzing ICFG test-0237.i [2022-12-14 08:59:08,487 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 08:59:08,487 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 87 error locations. [2022-12-14 08:59:08,535 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 08:59:08,541 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;@625fca56, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 08:59:08,541 INFO L358 AbstractCegarLoop]: Starting to check reachability of 87 error locations. [2022-12-14 08:59:08,546 INFO L276 IsEmpty]: Start isEmpty. Operand has 177 states, 82 states have (on average 2.317073170731707) internal successors, (190), 169 states have internal predecessors, (190), 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 08:59:08,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-12-14 08:59:08,552 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:59:08,553 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-12-14 08:59:08,554 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr44REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2022-12-14 08:59:08,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:59:08,559 INFO L85 PathProgramCache]: Analyzing trace with hash 374307, now seen corresponding path program 1 times [2022-12-14 08:59:08,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:59:08,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640320887] [2022-12-14 08:59:08,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:59:08,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:59:08,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:59:08,672 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 08:59:08,672 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:59:08,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640320887] [2022-12-14 08:59:08,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640320887] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:59:08,673 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:59:08,673 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 08:59:08,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221208337] [2022-12-14 08:59:08,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:59:08,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-14 08:59:08,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:59:08,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-14 08:59:08,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-14 08:59:08,705 INFO L87 Difference]: Start difference. First operand has 177 states, 82 states have (on average 2.317073170731707) internal successors, (190), 169 states have internal predecessors, (190), 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 08:59:08,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:59:08,773 INFO L93 Difference]: Finished difference Result 177 states and 192 transitions. [2022-12-14 08:59:08,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-14 08:59:08,775 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 08:59:08,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:59:08,783 INFO L225 Difference]: With dead ends: 177 [2022-12-14 08:59:08,783 INFO L226 Difference]: Without dead ends: 176 [2022-12-14 08:59:08,785 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 08:59:08,788 INFO L413 NwaCegarLoop]: 167 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, 167 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 08:59:08,788 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 167 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 08:59:08,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2022-12-14 08:59:08,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 176. [2022-12-14 08:59:08,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 82 states have (on average 2.182926829268293) internal successors, (179), 168 states have internal predecessors, (179), 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 08:59:08,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 191 transitions. [2022-12-14 08:59:08,831 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 191 transitions. Word has length 3 [2022-12-14 08:59:08,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:59:08,832 INFO L495 AbstractCegarLoop]: Abstraction has 176 states and 191 transitions. [2022-12-14 08:59:08,832 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 08:59:08,832 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 191 transitions. [2022-12-14 08:59:08,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-12-14 08:59:08,832 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:59:08,832 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-12-14 08:59:08,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 08:59:08,833 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting zalloc_or_dieErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2022-12-14 08:59:08,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:59:08,834 INFO L85 PathProgramCache]: Analyzing trace with hash 355142826, now seen corresponding path program 1 times [2022-12-14 08:59:08,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:59:08,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7880642] [2022-12-14 08:59:08,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:59:08,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:59:08,851 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 08:59:08,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2114900693] [2022-12-14 08:59:08,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:59:08,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:59:08,852 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7891013-185b-4c2a-a6ad-7898d83d81cd/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:59:08,853 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7891013-185b-4c2a-a6ad-7898d83d81cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:59:08,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7891013-185b-4c2a-a6ad-7898d83d81cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 08:59:08,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:59:08,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 08:59:08,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:59:08,963 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 08:59:08,971 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 08:59:08,971 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:59:08,971 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:59:08,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7880642] [2022-12-14 08:59:08,972 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 08:59:08,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114900693] [2022-12-14 08:59:08,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2114900693] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:59:08,972 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:59:08,972 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 08:59:08,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350065676] [2022-12-14 08:59:08,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:59:08,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:59:08,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:59:08,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:59:08,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:59:08,974 INFO L87 Difference]: Start difference. First operand 176 states and 191 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 08:59:09,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:59:09,114 INFO L93 Difference]: Finished difference Result 175 states and 190 transitions. [2022-12-14 08:59:09,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:59:09,114 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 08:59:09,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:59:09,115 INFO L225 Difference]: With dead ends: 175 [2022-12-14 08:59:09,116 INFO L226 Difference]: Without dead ends: 175 [2022-12-14 08:59:09,116 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 08:59:09,117 INFO L413 NwaCegarLoop]: 162 mSDtfsCounter, 5 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 08:59:09,117 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 260 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 08:59:09,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-12-14 08:59:09,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2022-12-14 08:59:09,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 82 states have (on average 2.1707317073170733) internal successors, (178), 167 states have internal predecessors, (178), 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 08:59:09,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 190 transitions. [2022-12-14 08:59:09,127 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 190 transitions. Word has length 5 [2022-12-14 08:59:09,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:59:09,127 INFO L495 AbstractCegarLoop]: Abstraction has 175 states and 190 transitions. [2022-12-14 08:59:09,127 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 08:59:09,127 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 190 transitions. [2022-12-14 08:59:09,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 08:59:09,127 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:59:09,127 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-14 08:59:09,132 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7891013-185b-4c2a-a6ad-7898d83d81cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 08:59:09,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7891013-185b-4c2a-a6ad-7898d83d81cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-12-14 08:59:09,329 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2022-12-14 08:59:09,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:59:09,332 INFO L85 PathProgramCache]: Analyzing trace with hash -1875473933, now seen corresponding path program 1 times [2022-12-14 08:59:09,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:59:09,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922724410] [2022-12-14 08:59:09,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:59:09,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:59:09,370 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 08:59:09,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1395153446] [2022-12-14 08:59:09,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:59:09,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:59:09,372 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7891013-185b-4c2a-a6ad-7898d83d81cd/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:59:09,375 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7891013-185b-4c2a-a6ad-7898d83d81cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:59:09,379 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7891013-185b-4c2a-a6ad-7898d83d81cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 08:59:09,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:59:09,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-14 08:59:09,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:59:09,578 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 08:59:09,603 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 08:59:09,603 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:59:09,603 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:59:09,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922724410] [2022-12-14 08:59:09,603 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 08:59:09,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395153446] [2022-12-14 08:59:09,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395153446] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:59:09,604 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:59:09,604 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 08:59:09,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747680446] [2022-12-14 08:59:09,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:59:09,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 08:59:09,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:59:09,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 08:59:09,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 08:59:09,605 INFO L87 Difference]: Start difference. First operand 175 states and 190 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 08:59:09,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:59:09,764 INFO L93 Difference]: Finished difference Result 180 states and 195 transitions. [2022-12-14 08:59:09,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 08:59:09,764 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 08:59:09,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:59:09,765 INFO L225 Difference]: With dead ends: 180 [2022-12-14 08:59:09,766 INFO L226 Difference]: Without dead ends: 180 [2022-12-14 08:59:09,766 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 08:59:09,767 INFO L413 NwaCegarLoop]: 161 mSDtfsCounter, 8 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 435 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 08:59:09,767 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 435 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 08:59:09,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2022-12-14 08:59:09,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 180. [2022-12-14 08:59:09,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 86 states have (on average 2.127906976744186) internal successors, (183), 171 states have internal predecessors, (183), 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 08:59:09,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 195 transitions. [2022-12-14 08:59:09,779 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 195 transitions. Word has length 6 [2022-12-14 08:59:09,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:59:09,779 INFO L495 AbstractCegarLoop]: Abstraction has 180 states and 195 transitions. [2022-12-14 08:59:09,779 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 08:59:09,779 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 195 transitions. [2022-12-14 08:59:09,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-12-14 08:59:09,780 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:59:09,780 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:59:09,785 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7891013-185b-4c2a-a6ad-7898d83d81cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-12-14 08:59:09,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7891013-185b-4c2a-a6ad-7898d83d81cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:59:09,982 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2022-12-14 08:59:09,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:59:09,983 INFO L85 PathProgramCache]: Analyzing trace with hash -1708028809, now seen corresponding path program 1 times [2022-12-14 08:59:09,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:59:09,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278762568] [2022-12-14 08:59:09,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:59:09,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:59:10,030 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 08:59:10,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [110319028] [2022-12-14 08:59:10,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:59:10,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:59:10,033 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7891013-185b-4c2a-a6ad-7898d83d81cd/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:59:10,036 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7891013-185b-4c2a-a6ad-7898d83d81cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:59:10,040 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7891013-185b-4c2a-a6ad-7898d83d81cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 08:59:10,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:59:10,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-14 08:59:10,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:59:10,252 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 10 treesize of output 9 [2022-12-14 08:59:10,347 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 08:59:10,471 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:59:10,471 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:59:10,471 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:59:10,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278762568] [2022-12-14 08:59:10,471 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 08:59:10,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110319028] [2022-12-14 08:59:10,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110319028] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:59:10,471 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:59:10,471 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 08:59:10,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555996898] [2022-12-14 08:59:10,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:59:10,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 08:59:10,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:59:10,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 08:59:10,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 08:59:10,473 INFO L87 Difference]: Start difference. First operand 180 states and 195 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 08:59:14,657 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 08:59:17,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:59:17,110 INFO L93 Difference]: Finished difference Result 184 states and 199 transitions. [2022-12-14 08:59:17,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 08:59:17,114 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-12-14 08:59:17,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:59:17,115 INFO L225 Difference]: With dead ends: 184 [2022-12-14 08:59:17,115 INFO L226 Difference]: Without dead ends: 182 [2022-12-14 08:59:17,116 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=17, Invalid=23, Unknown=2, NotChecked=0, Total=42 [2022-12-14 08:59:17,117 INFO L413 NwaCegarLoop]: 156 mSDtfsCounter, 7 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 5 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 559 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-12-14 08:59:17,117 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 559 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 194 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2022-12-14 08:59:17,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-12-14 08:59:17,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 182. [2022-12-14 08:59:17,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 88 states have (on average 2.102272727272727) internal successors, (185), 173 states have internal predecessors, (185), 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 08:59:17,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 197 transitions. [2022-12-14 08:59:17,125 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 197 transitions. Word has length 14 [2022-12-14 08:59:17,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:59:17,126 INFO L495 AbstractCegarLoop]: Abstraction has 182 states and 197 transitions. [2022-12-14 08:59:17,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 08:59:17,126 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 197 transitions. [2022-12-14 08:59:17,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-12-14 08:59:17,126 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:59:17,127 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:59:17,132 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7891013-185b-4c2a-a6ad-7898d83d81cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-12-14 08:59:17,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7891013-185b-4c2a-a6ad-7898d83d81cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:59:17,328 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2022-12-14 08:59:17,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:59:17,329 INFO L85 PathProgramCache]: Analyzing trace with hash 835038546, now seen corresponding path program 1 times [2022-12-14 08:59:17,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:59:17,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057504142] [2022-12-14 08:59:17,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:59:17,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:59:17,366 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 08:59:17,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [538939662] [2022-12-14 08:59:17,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:59:17,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:59:17,369 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7891013-185b-4c2a-a6ad-7898d83d81cd/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:59:17,371 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7891013-185b-4c2a-a6ad-7898d83d81cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:59:17,375 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7891013-185b-4c2a-a6ad-7898d83d81cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 08:59:17,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:59:17,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-14 08:59:17,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:59:17,613 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 08:59:17,634 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 08:59:17,634 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 08:59:17,634 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:59:17,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057504142] [2022-12-14 08:59:17,635 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 08:59:17,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538939662] [2022-12-14 08:59:17,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [538939662] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:59:17,635 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:59:17,635 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 08:59:17,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889418988] [2022-12-14 08:59:17,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:59:17,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 08:59:17,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:59:17,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 08:59:17,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 08:59:17,637 INFO L87 Difference]: Start difference. First operand 182 states and 197 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 08:59:17,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:59:17,792 INFO L93 Difference]: Finished difference Result 188 states and 203 transitions. [2022-12-14 08:59:17,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 08:59:17,793 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-12-14 08:59:17,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:59:17,794 INFO L225 Difference]: With dead ends: 188 [2022-12-14 08:59:17,794 INFO L226 Difference]: Without dead ends: 188 [2022-12-14 08:59:17,794 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 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 08:59:17,795 INFO L413 NwaCegarLoop]: 157 mSDtfsCounter, 8 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 08:59:17,795 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 423 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 08:59:17,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-12-14 08:59:17,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 188. [2022-12-14 08:59:17,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 93 states have (on average 2.053763440860215) internal successors, (191), 178 states have internal predecessors, (191), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-12-14 08:59:17,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 203 transitions. [2022-12-14 08:59:17,803 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 203 transitions. Word has length 15 [2022-12-14 08:59:17,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:59:17,803 INFO L495 AbstractCegarLoop]: Abstraction has 188 states and 203 transitions. [2022-12-14 08:59:17,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 08:59:17,804 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 203 transitions. [2022-12-14 08:59:17,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-12-14 08:59:17,805 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:59:17,805 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 08:59:17,809 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7891013-185b-4c2a-a6ad-7898d83d81cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 08:59:18,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7891013-185b-4c2a-a6ad-7898d83d81cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:59:18,006 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2022-12-14 08:59:18,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:59:18,006 INFO L85 PathProgramCache]: Analyzing trace with hash 650282360, now seen corresponding path program 1 times [2022-12-14 08:59:18,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:59:18,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829069640] [2022-12-14 08:59:18,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:59:18,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:59:18,029 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 08:59:18,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [886609202] [2022-12-14 08:59:18,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:59:18,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:59:18,030 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7891013-185b-4c2a-a6ad-7898d83d81cd/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:59:18,031 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7891013-185b-4c2a-a6ad-7898d83d81cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:59:18,032 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7891013-185b-4c2a-a6ad-7898d83d81cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 08:59:18,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:59:18,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 590 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-14 08:59:18,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:59:18,253 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 08:59:20,313 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 08:59:22,490 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 70 proven. 5 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-12-14 08:59:22,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:59:22,727 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 29 proven. 15 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-12-14 08:59:22,727 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:59:22,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829069640] [2022-12-14 08:59:22,727 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 08:59:22,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886609202] [2022-12-14 08:59:22,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886609202] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:59:22,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1987228089] [2022-12-14 08:59:22,744 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2022-12-14 08:59:22,744 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 08:59:22,748 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 08:59:22,751 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 08:59:22,752 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 08:59:22,803 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 08:59:22,810 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 08:59:22,833 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 08:59:22,843 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 08:59:22,852 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 08:59:22,918 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-12-14 08:59:22,918 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 08:59:22,948 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-12-14 08:59:22,948 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 08:59:22,976 INFO L321 Elim1Store]: treesize reduction 15, result has 42.3 percent of original size [2022-12-14 08:59:22,976 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 08:59:23,133 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 08:59:23,139 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 08:59:23,145 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 08:59:23,174 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 08:59:23,184 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 08:59:23,211 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 08:59:23,218 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 08:59:24,240 INFO L197 IcfgInterpreter]: Interpreting procedure zalloc_or_die with input of size 81 for LOIs [2022-12-14 08:59:24,271 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 08:59:24,290 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 08:59:24,402 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 08:59:24,423 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 08:59:24,455 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 08:59:24,488 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 08:59:24,494 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 08:59:24,501 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 08:59:24,529 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 08:59:32,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1987228089] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:59:32,736 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-14 08:59:32,737 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [7, 6] total 31 [2022-12-14 08:59:32,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641850525] [2022-12-14 08:59:32,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:59:32,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-14 08:59:32,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:59:32,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-14 08:59:32,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=792, Unknown=2, NotChecked=0, Total=930 [2022-12-14 08:59:32,740 INFO L87 Difference]: Start difference. First operand 188 states and 203 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 08:59:35,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:59:35,462 INFO L93 Difference]: Finished difference Result 379 states and 409 transitions. [2022-12-14 08:59:35,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-12-14 08:59:35,463 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 08:59:35,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:59:35,464 INFO L225 Difference]: With dead ends: 379 [2022-12-14 08:59:35,464 INFO L226 Difference]: Without dead ends: 379 [2022-12-14 08:59:35,464 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 112 SyntacticMatches, 7 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 12.8s TimeCoverageRelationStatistics Valid=142, Invalid=848, Unknown=2, NotChecked=0, Total=992 [2022-12-14 08:59:35,465 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 323 mSDsluCounter, 885 mSDsCounter, 0 mSdLazyCounter, 1553 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 970 SdHoareTripleChecker+Invalid, 1554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-12-14 08:59:35,465 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [324 Valid, 970 Invalid, 1554 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1553 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-12-14 08:59:35,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2022-12-14 08:59:35,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 245. [2022-12-14 08:59:35,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 141 states have (on average 2.0141843971631204) internal successors, (284), 226 states have internal predecessors, (284), 12 states have call successors, (12), 6 states have call predecessors, (12), 6 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-12-14 08:59:35,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 308 transitions. [2022-12-14 08:59:35,471 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 308 transitions. Word has length 50 [2022-12-14 08:59:35,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:59:35,471 INFO L495 AbstractCegarLoop]: Abstraction has 245 states and 308 transitions. [2022-12-14 08:59:35,471 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 08:59:35,472 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 308 transitions. [2022-12-14 08:59:35,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-12-14 08:59:35,472 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:59:35,472 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 08:59:35,478 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7891013-185b-4c2a-a6ad-7898d83d81cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 08:59:35,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7891013-185b-4c2a-a6ad-7898d83d81cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-12-14 08:59:35,674 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2022-12-14 08:59:35,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:59:35,675 INFO L85 PathProgramCache]: Analyzing trace with hash 1329181019, now seen corresponding path program 1 times [2022-12-14 08:59:35,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:59:35,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089563602] [2022-12-14 08:59:35,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:59:35,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:59:35,740 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 08:59:35,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1957142678] [2022-12-14 08:59:35,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:59:35,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:59:35,741 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7891013-185b-4c2a-a6ad-7898d83d81cd/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:59:35,742 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7891013-185b-4c2a-a6ad-7898d83d81cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:59:35,743 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7891013-185b-4c2a-a6ad-7898d83d81cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 08:59:35,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:59:35,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 633 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-14 08:59:35,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:59:35,899 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_224 Int)) (= |c_#valid| (store |c_old(#valid)| |c_zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_224))) is different from true [2022-12-14 08:59:35,942 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-12-14 08:59:35,942 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 08:59:35,951 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 08:59:35,952 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:59:36,080 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-12-14 08:59:36,081 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 08:59:36,093 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 08:59:36,093 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:59:36,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089563602] [2022-12-14 08:59:36,094 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 08:59:36,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957142678] [2022-12-14 08:59:36,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1957142678] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:59:36,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1563001742] [2022-12-14 08:59:36,096 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2022-12-14 08:59:36,096 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 08:59:36,097 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 08:59:36,097 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 08:59:36,097 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 08:59:36,127 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 08:59:36,133 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 08:59:36,150 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 16 treesize of output 12 [2022-12-14 08:59:36,160 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 14 treesize of output 10 [2022-12-14 08:59:36,168 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 08:59:36,221 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 08:59:36,233 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 08:59:36,244 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 08:59:36,292 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 08:59:36,298 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 08:59:36,306 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 14 treesize of output 10 [2022-12-14 08:59:36,347 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 08:59:36,354 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 08:59:36,395 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 08:59:36,401 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 08:59:37,639 INFO L197 IcfgInterpreter]: Interpreting procedure zalloc_or_die with input of size 81 for LOIs [2022-12-14 08:59:37,677 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 08:59:37,691 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 08:59:37,781 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 11 treesize of output 7 [2022-12-14 08:59:37,811 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 08:59:37,827 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 08:59:37,873 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 08:59:37,882 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 08:59:37,890 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 08:59:37,899 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 08:59:43,122 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3400#(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_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)) (= |ULTIMATE.start_l2_insert_~owner#1.base| |ULTIMATE.start_l2_insert_#in~owner#1.base|) (= (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|) (= |ULTIMATE.start_l4_insert_#in~owner#1.offset| |ULTIMATE.start_l4_insert_~owner#1.offset|) (= |ULTIMATE.start_l4_insert_~owner#1.base| |ULTIMATE.start_l4_insert_#in~owner#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_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_l4_insert_#in~owner#1.offset| 8) (<= |ULTIMATE.start_l0_insert_~list#1.base| 3) (= |ULTIMATE.start_l0_insert_~list#1.base| |ULTIMATE.start_l0_insert_#in~list#1.base|) (= |ULTIMATE.start_l1_insert_~list#1.base| |ULTIMATE.start_l2_insert_#in~owner#1.base|) (= |ULTIMATE.start_l2_insert_#in~owner#1.offset| |ULTIMATE.start_l2_insert_~owner#1.offset|) (not (= (select |#valid| |ULTIMATE.start_l4_insert_~item~0#1.base|) 1)) (= |ULTIMATE.start_l4_insert_#t~ret7#1.offset| 0) (<= 0 |ULTIMATE.start_l4_insert_~list#1.offset|) (= |ULTIMATE.start_l0_insert_~item~4#1.offset| 0) (= (select |ULTIMATE.start_main_old_#valid#1| 0) 0) (<= 4 |ULTIMATE.start_l1_insert_~list#1.offset|) (<= |ULTIMATE.start_l2_insert_~owner#1.offset| 4) (= |ULTIMATE.start_l1_insert_~list#1.offset| |ULTIMATE.start_l2_insert_#in~owner#1.offset|) (<= 3 |ULTIMATE.start_l0_insert_~list#1.base|) (= |ULTIMATE.start_l1_insert_~item~3#1.offset| 0) (= |ULTIMATE.start_l0_insert_~list#1.offset| |ULTIMATE.start_l0_insert_#in~list#1.offset|) (= (+ |ULTIMATE.start_l0_insert_~item~4#1.offset| 4) |ULTIMATE.start_l1_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~owner#1.offset| |ULTIMATE.start_l3_insert_~list#1.offset|) (<= |ULTIMATE.start_l4_insert_#in~list#1.offset| 0) (<= 8 |ULTIMATE.start_l4_insert_#in~owner#1.offset|) (= |ULTIMATE.start_l2_insert_~item~2#1.offset| 0) (= |ULTIMATE.start_l3_insert_~list#1.base| |ULTIMATE.start_l4_insert_#in~owner#1.base|) (<= 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) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 08:59:43,122 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 08:59:43,122 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 08:59:43,122 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2022-12-14 08:59:43,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074205072] [2022-12-14 08:59:43,123 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 08:59:43,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-14 08:59:43,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:59:43,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-14 08:59:43,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=910, Unknown=1, NotChecked=62, Total=1122 [2022-12-14 08:59:43,124 INFO L87 Difference]: Start difference. First operand 245 states and 308 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 08:59:43,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:59:43,562 INFO L93 Difference]: Finished difference Result 274 states and 336 transitions. [2022-12-14 08:59:43,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 08:59:43,563 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 08:59:43,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:59:43,565 INFO L225 Difference]: With dead ends: 274 [2022-12-14 08:59:43,565 INFO L226 Difference]: Without dead ends: 274 [2022-12-14 08:59:43,566 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 121 SyntacticMatches, 9 SemanticMatches, 36 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=179, Invalid=1156, Unknown=1, NotChecked=70, Total=1406 [2022-12-14 08:59:43,567 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 112 mSDsluCounter, 682 mSDsCounter, 0 mSdLazyCounter, 696 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 809 SdHoareTripleChecker+Invalid, 923 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 696 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 202 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 08:59:43,567 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 809 Invalid, 923 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 696 Invalid, 0 Unknown, 202 Unchecked, 0.3s Time] [2022-12-14 08:59:43,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2022-12-14 08:59:43,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 241. [2022-12-14 08:59:43,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 141 states have (on average 1.9574468085106382) internal successors, (276), 222 states have internal predecessors, (276), 12 states have call successors, (12), 6 states have call predecessors, (12), 6 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-12-14 08:59:43,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 300 transitions. [2022-12-14 08:59:43,577 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 300 transitions. Word has length 54 [2022-12-14 08:59:43,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:59:43,577 INFO L495 AbstractCegarLoop]: Abstraction has 241 states and 300 transitions. [2022-12-14 08:59:43,577 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 08:59:43,577 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 300 transitions. [2022-12-14 08:59:43,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-12-14 08:59:43,579 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:59:43,579 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 08:59:43,586 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7891013-185b-4c2a-a6ad-7898d83d81cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 08:59:43,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7891013-185b-4c2a-a6ad-7898d83d81cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-12-14 08:59:43,781 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2022-12-14 08:59:43,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:59:43,782 INFO L85 PathProgramCache]: Analyzing trace with hash 1329181020, now seen corresponding path program 1 times [2022-12-14 08:59:43,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:59:43,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727648727] [2022-12-14 08:59:43,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:59:43,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:59:43,830 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 08:59:43,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [790314294] [2022-12-14 08:59:43,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:59:43,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:59:43,831 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7891013-185b-4c2a-a6ad-7898d83d81cd/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:59:43,833 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7891013-185b-4c2a-a6ad-7898d83d81cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:59:43,834 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7891013-185b-4c2a-a6ad-7898d83d81cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 08:59:44,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:59:44,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 633 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-14 08:59:44,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:59:44,135 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 08:59:44,159 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 08:59:44,198 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 67 proven. 9 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-12-14 08:59:44,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:59:44,342 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 28 proven. 8 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-12-14 08:59:44,343 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:59:44,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727648727] [2022-12-14 08:59:44,343 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 08:59:44,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790314294] [2022-12-14 08:59:44,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790314294] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:59:44,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1306204796] [2022-12-14 08:59:44,346 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2022-12-14 08:59:44,346 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 08:59:44,346 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 08:59:44,346 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 08:59:44,346 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 08:59:44,377 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 08:59:44,383 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 08:59:44,402 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 08:59:44,410 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 08:59:44,418 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 08:59:44,452 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 08:59:44,464 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 08:59:44,474 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 08:59:44,519 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 08:59:44,526 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 08:59:44,534 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 08:59:44,565 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 08:59:44,584 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 08:59:44,642 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 08:59:44,648 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 08:59:45,889 INFO L197 IcfgInterpreter]: Interpreting procedure zalloc_or_die with input of size 81 for LOIs [2022-12-14 08:59:45,924 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 08:59:45,934 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 08:59:46,014 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 16 treesize of output 12 [2022-12-14 08:59:46,033 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 08:59:46,057 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 08:59:46,103 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 08:59:46,111 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 16 treesize of output 12 [2022-12-14 08:59:46,126 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 08:59:46,135 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 08:59:51,345 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4276#(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_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)) (= |ULTIMATE.start_l2_insert_~owner#1.base| |ULTIMATE.start_l2_insert_#in~owner#1.base|) (= (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|) (= |ULTIMATE.start_l4_insert_#in~owner#1.offset| |ULTIMATE.start_l4_insert_~owner#1.offset|) (= |ULTIMATE.start_l4_insert_~owner#1.base| |ULTIMATE.start_l4_insert_#in~owner#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_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_l4_insert_#in~owner#1.offset| 8) (<= |ULTIMATE.start_l0_insert_~list#1.base| 3) (= |ULTIMATE.start_l0_insert_~list#1.base| |ULTIMATE.start_l0_insert_#in~list#1.base|) (= |ULTIMATE.start_l1_insert_~list#1.base| |ULTIMATE.start_l2_insert_#in~owner#1.base|) (= |ULTIMATE.start_l2_insert_#in~owner#1.offset| |ULTIMATE.start_l2_insert_~owner#1.offset|) (= |ULTIMATE.start_l4_insert_#t~ret7#1.offset| 0) (<= 0 |ULTIMATE.start_l4_insert_~list#1.offset|) (= |ULTIMATE.start_l0_insert_~item~4#1.offset| 0) (= (select |ULTIMATE.start_main_old_#valid#1| 0) 0) (<= 4 |ULTIMATE.start_l1_insert_~list#1.offset|) (<= |ULTIMATE.start_l2_insert_~owner#1.offset| 4) (= |ULTIMATE.start_l1_insert_~list#1.offset| |ULTIMATE.start_l2_insert_#in~owner#1.offset|) (<= 3 |ULTIMATE.start_l0_insert_~list#1.base|) (= |ULTIMATE.start_l1_insert_~item~3#1.offset| 0) (= |ULTIMATE.start_l0_insert_~list#1.offset| |ULTIMATE.start_l0_insert_#in~list#1.offset|) (= (+ |ULTIMATE.start_l0_insert_~item~4#1.offset| 4) |ULTIMATE.start_l1_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~owner#1.offset| |ULTIMATE.start_l3_insert_~list#1.offset|) (<= |ULTIMATE.start_l4_insert_#in~list#1.offset| 0) (<= 8 |ULTIMATE.start_l4_insert_#in~owner#1.offset|) (= |ULTIMATE.start_l2_insert_~item~2#1.offset| 0) (= |ULTIMATE.start_l3_insert_~list#1.base| |ULTIMATE.start_l4_insert_#in~owner#1.base|) (<= 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) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 08:59:51,346 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 08:59:51,346 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 08:59:51,346 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2022-12-14 08:59:51,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963616774] [2022-12-14 08:59:51,346 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 08:59:51,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-14 08:59:51,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:59:51,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-14 08:59:51,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=897, Unknown=0, NotChecked=0, Total=1056 [2022-12-14 08:59:51,348 INFO L87 Difference]: Start difference. First operand 241 states and 300 transitions. Second operand has 11 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 11 states have internal predecessors, (34), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-12-14 08:59:51,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:59:51,795 INFO L93 Difference]: Finished difference Result 265 states and 328 transitions. [2022-12-14 08:59:51,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 08:59:51,796 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 11 states have internal predecessors, (34), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 54 [2022-12-14 08:59:51,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:59:51,797 INFO L225 Difference]: With dead ends: 265 [2022-12-14 08:59:51,797 INFO L226 Difference]: Without dead ends: 255 [2022-12-14 08:59:51,798 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 123 SyntacticMatches, 6 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 431 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=238, Invalid=1402, Unknown=0, NotChecked=0, Total=1640 [2022-12-14 08:59:51,799 INFO L413 NwaCegarLoop]: 151 mSDtfsCounter, 38 mSDsluCounter, 832 mSDsCounter, 0 mSdLazyCounter, 320 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 983 SdHoareTripleChecker+Invalid, 335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 08:59:51,799 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 983 Invalid, 335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 320 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 08:59:51,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2022-12-14 08:59:51,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 255. [2022-12-14 08:59:51,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 155 states have (on average 1.8709677419354838) internal successors, (290), 236 states have internal predecessors, (290), 12 states have call successors, (12), 6 states have call predecessors, (12), 6 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-12-14 08:59:51,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 314 transitions. [2022-12-14 08:59:51,803 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 314 transitions. Word has length 54 [2022-12-14 08:59:51,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:59:51,804 INFO L495 AbstractCegarLoop]: Abstraction has 255 states and 314 transitions. [2022-12-14 08:59:51,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 11 states have internal predecessors, (34), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-12-14 08:59:51,804 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 314 transitions. [2022-12-14 08:59:51,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-12-14 08:59:51,804 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:59:51,804 INFO L195 NwaCegarLoop]: trace histogram [22, 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 08:59:51,810 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7891013-185b-4c2a-a6ad-7898d83d81cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 08:59:52,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7891013-185b-4c2a-a6ad-7898d83d81cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:59:52,006 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2022-12-14 08:59:52,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:59:52,008 INFO L85 PathProgramCache]: Analyzing trace with hash 1066635714, now seen corresponding path program 2 times [2022-12-14 08:59:52,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:59:52,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517800179] [2022-12-14 08:59:52,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:59:52,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:59:52,069 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 08:59:52,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [624730728] [2022-12-14 08:59:52,070 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 08:59:52,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:59:52,070 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7891013-185b-4c2a-a6ad-7898d83d81cd/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:59:52,071 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7891013-185b-4c2a-a6ad-7898d83d81cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:59:52,072 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7891013-185b-4c2a-a6ad-7898d83d81cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 08:59:52,516 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 08:59:52,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 08:59:52,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 27 conjunts are in the unsatisfiable core [2022-12-14 08:59:52,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:59:52,530 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 08:59:52,541 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 08:59:52,616 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 130 proven. 10 refuted. 0 times theorem prover too weak. 298 trivial. 0 not checked. [2022-12-14 08:59:52,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:59:53,136 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 130 proven. 10 refuted. 0 times theorem prover too weak. 298 trivial. 0 not checked. [2022-12-14 08:59:53,136 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:59:53,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517800179] [2022-12-14 08:59:53,136 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 08:59:53,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624730728] [2022-12-14 08:59:53,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624730728] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:59:53,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [746096410] [2022-12-14 08:59:53,139 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2022-12-14 08:59:53,139 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 08:59:53,139 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 08:59:53,139 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 08:59:53,139 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 08:59:53,162 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 08:59:53,167 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 08:59:53,213 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 16 treesize of output 12 [2022-12-14 08:59:53,221 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 08:59:53,230 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 08:59:53,280 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 08:59:53,292 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 08:59:53,305 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 08:59:53,354 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 08:59:53,360 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 08:59:53,365 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 08:59:53,398 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 08:59:53,402 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 08:59:53,428 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 08:59:53,431 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 08:59:54,492 INFO L197 IcfgInterpreter]: Interpreting procedure zalloc_or_die with input of size 81 for LOIs [2022-12-14 08:59:54,537 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 08:59:54,559 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 08:59:54,638 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 08:59:54,676 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 08:59:54,711 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 08:59:54,742 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 08:59:54,750 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 08:59:54,759 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 08:59:54,772 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:00:01,005 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5264#(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_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)) (= |ULTIMATE.start_l2_insert_~owner#1.base| |ULTIMATE.start_l2_insert_#in~owner#1.base|) (= (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|) (= |ULTIMATE.start_l4_insert_#in~owner#1.offset| |ULTIMATE.start_l4_insert_~owner#1.offset|) (= |ULTIMATE.start_l4_insert_~owner#1.base| |ULTIMATE.start_l4_insert_#in~owner#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_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_l4_insert_#in~owner#1.offset| 8) (<= |ULTIMATE.start_l0_insert_~list#1.base| 3) (= |ULTIMATE.start_l0_insert_~list#1.base| |ULTIMATE.start_l0_insert_#in~list#1.base|) (= |ULTIMATE.start_l1_insert_~list#1.base| |ULTIMATE.start_l2_insert_#in~owner#1.base|) (= |ULTIMATE.start_l2_insert_#in~owner#1.offset| |ULTIMATE.start_l2_insert_~owner#1.offset|) (= |ULTIMATE.start_l4_insert_#t~ret7#1.offset| 0) (<= 0 |ULTIMATE.start_l4_insert_~list#1.offset|) (= |ULTIMATE.start_l0_insert_~item~4#1.offset| 0) (= (select |ULTIMATE.start_main_old_#valid#1| 0) 0) (<= 4 |ULTIMATE.start_l1_insert_~list#1.offset|) (<= |ULTIMATE.start_l2_insert_~owner#1.offset| 4) (= |ULTIMATE.start_l1_insert_~list#1.offset| |ULTIMATE.start_l2_insert_#in~owner#1.offset|) (<= 3 |ULTIMATE.start_l0_insert_~list#1.base|) (= |ULTIMATE.start_l1_insert_~item~3#1.offset| 0) (= |ULTIMATE.start_l0_insert_~list#1.offset| |ULTIMATE.start_l0_insert_#in~list#1.offset|) (= (+ |ULTIMATE.start_l0_insert_~item~4#1.offset| 4) |ULTIMATE.start_l1_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~owner#1.offset| |ULTIMATE.start_l3_insert_~list#1.offset|) (<= |ULTIMATE.start_l4_insert_#in~list#1.offset| 0) (<= 8 |ULTIMATE.start_l4_insert_#in~owner#1.offset|) (= |ULTIMATE.start_l2_insert_~item~2#1.offset| 0) (= |ULTIMATE.start_l3_insert_~list#1.base| |ULTIMATE.start_l4_insert_#in~owner#1.base|) (<= 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) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 09:00:01,006 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 09:00:01,006 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 09:00:01,006 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2022-12-14 09:00:01,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095157349] [2022-12-14 09:00:01,006 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 09:00:01,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-14 09:00:01,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:00:01,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-14 09:00:01,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=1208, Unknown=0, NotChecked=0, Total=1406 [2022-12-14 09:00:01,008 INFO L87 Difference]: Start difference. First operand 255 states and 314 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 09:00:02,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:00:02,380 INFO L93 Difference]: Finished difference Result 287 states and 354 transitions. [2022-12-14 09:00:02,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-12-14 09:00:02,380 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 70 [2022-12-14 09:00:02,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:00:02,382 INFO L225 Difference]: With dead ends: 287 [2022-12-14 09:00:02,382 INFO L226 Difference]: Without dead ends: 275 [2022-12-14 09:00:02,383 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 166 SyntacticMatches, 6 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 812 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=483, Invalid=2709, Unknown=0, NotChecked=0, Total=3192 [2022-12-14 09:00:02,384 INFO L413 NwaCegarLoop]: 151 mSDtfsCounter, 53 mSDsluCounter, 927 mSDsCounter, 0 mSdLazyCounter, 461 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 1078 SdHoareTripleChecker+Invalid, 497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 461 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 09:00:02,384 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 1078 Invalid, 497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 461 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 09:00:02,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2022-12-14 09:00:02,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 275. [2022-12-14 09:00:02,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 175 states have (on average 1.7714285714285714) internal successors, (310), 256 states have internal predecessors, (310), 12 states have call successors, (12), 6 states have call predecessors, (12), 6 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-12-14 09:00:02,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 334 transitions. [2022-12-14 09:00:02,388 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 334 transitions. Word has length 70 [2022-12-14 09:00:02,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:00:02,388 INFO L495 AbstractCegarLoop]: Abstraction has 275 states and 334 transitions. [2022-12-14 09:00:02,388 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 09:00:02,388 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 334 transitions. [2022-12-14 09:00:02,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-12-14 09:00:02,389 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:00:02,389 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 09:00:02,394 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7891013-185b-4c2a-a6ad-7898d83d81cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-14 09:00:02,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7891013-185b-4c2a-a6ad-7898d83d81cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:00:02,590 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2022-12-14 09:00:02,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:00:02,590 INFO L85 PathProgramCache]: Analyzing trace with hash 362371085, now seen corresponding path program 3 times [2022-12-14 09:00:02,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:00:02,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828993878] [2022-12-14 09:00:02,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:00:02,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:00:02,613 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 09:00:02,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [97654692] [2022-12-14 09:00:02,613 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 09:00:02,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:00:02,614 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7891013-185b-4c2a-a6ad-7898d83d81cd/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:00:02,614 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7891013-185b-4c2a-a6ad-7898d83d81cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:00:02,615 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7891013-185b-4c2a-a6ad-7898d83d81cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 09:00:04,569 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 09:00:04,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:00:04,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 1068 conjuncts, 65 conjunts are in the unsatisfiable core [2022-12-14 09:00:04,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:00:04,602 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 09:00:04,620 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 09:00:04,717 INFO L134 CoverageAnalysis]: Checked inductivity of 880 backedges. 503 proven. 85 refuted. 0 times theorem prover too weak. 292 trivial. 0 not checked. [2022-12-14 09:00:04,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:00:05,110 INFO L134 CoverageAnalysis]: Checked inductivity of 880 backedges. 78 proven. 162 refuted. 0 times theorem prover too weak. 640 trivial. 0 not checked. [2022-12-14 09:00:05,110 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:00:05,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828993878] [2022-12-14 09:00:05,110 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 09:00:05,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97654692] [2022-12-14 09:00:05,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [97654692] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:00:05,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1590063783] [2022-12-14 09:00:05,112 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2022-12-14 09:00:05,112 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:00:05,113 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:00:05,113 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:00:05,113 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:00:05,135 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 09:00:05,140 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 09:00:05,210 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 09:00:05,218 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 14 treesize of output 10 [2022-12-14 09:00:05,226 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 09:00:05,254 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 09:00:05,262 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 09:00:05,271 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 09:00:05,306 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 14 treesize of output 10 [2022-12-14 09:00:05,311 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 09:00:05,317 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 09:00:05,338 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 09:00:05,353 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 09:00:05,373 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 09:00:05,390 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 09:00:06,380 INFO L197 IcfgInterpreter]: Interpreting procedure zalloc_or_die with input of size 81 for LOIs [2022-12-14 09:00:06,399 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 09:00:06,415 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 09:00:06,479 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 09:00:06,498 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 09:00:06,535 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 09:00:06,569 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 09:00:06,578 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 09:00:06,584 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 09:00:06,597 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:00:12,520 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6401#(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_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)) (= |ULTIMATE.start_l2_insert_~owner#1.base| |ULTIMATE.start_l2_insert_#in~owner#1.base|) (= (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|) (= |ULTIMATE.start_l4_insert_#in~owner#1.offset| |ULTIMATE.start_l4_insert_~owner#1.offset|) (= |ULTIMATE.start_l4_insert_~owner#1.base| |ULTIMATE.start_l4_insert_#in~owner#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_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_l4_insert_#in~owner#1.offset| 8) (<= |ULTIMATE.start_l0_insert_~list#1.base| 3) (= |ULTIMATE.start_l0_insert_~list#1.base| |ULTIMATE.start_l0_insert_#in~list#1.base|) (= |ULTIMATE.start_l1_insert_~list#1.base| |ULTIMATE.start_l2_insert_#in~owner#1.base|) (= |ULTIMATE.start_l2_insert_#in~owner#1.offset| |ULTIMATE.start_l2_insert_~owner#1.offset|) (= |ULTIMATE.start_l4_insert_#t~ret7#1.offset| 0) (<= 0 |ULTIMATE.start_l4_insert_~list#1.offset|) (= |ULTIMATE.start_l0_insert_~item~4#1.offset| 0) (= (select |ULTIMATE.start_main_old_#valid#1| 0) 0) (<= 4 |ULTIMATE.start_l1_insert_~list#1.offset|) (<= |ULTIMATE.start_l2_insert_~owner#1.offset| 4) (= |ULTIMATE.start_l1_insert_~list#1.offset| |ULTIMATE.start_l2_insert_#in~owner#1.offset|) (<= 3 |ULTIMATE.start_l0_insert_~list#1.base|) (= |ULTIMATE.start_l1_insert_~item~3#1.offset| 0) (= |ULTIMATE.start_l0_insert_~list#1.offset| |ULTIMATE.start_l0_insert_#in~list#1.offset|) (= (+ |ULTIMATE.start_l0_insert_~item~4#1.offset| 4) |ULTIMATE.start_l1_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~owner#1.offset| |ULTIMATE.start_l3_insert_~list#1.offset|) (<= |ULTIMATE.start_l4_insert_#in~list#1.offset| 0) (<= 8 |ULTIMATE.start_l4_insert_#in~owner#1.offset|) (= |ULTIMATE.start_l2_insert_~item~2#1.offset| 0) (= |ULTIMATE.start_l3_insert_~list#1.base| |ULTIMATE.start_l4_insert_#in~owner#1.base|) (<= 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) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 09:00:12,520 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 09:00:12,520 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 09:00:12,520 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10] total 23 [2022-12-14 09:00:12,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27399355] [2022-12-14 09:00:12,520 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 09:00:12,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-14 09:00:12,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:00:12,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-14 09:00:12,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=1749, Unknown=0, NotChecked=0, Total=1980 [2022-12-14 09:00:12,522 INFO L87 Difference]: Start difference. First operand 275 states and 334 transitions. Second operand has 23 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 23 states have internal predecessors, (46), 2 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-12-14 09:00:14,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:00:14,710 INFO L93 Difference]: Finished difference Result 303 states and 374 transitions. [2022-12-14 09:00:14,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-14 09:00:14,711 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 23 states have internal predecessors, (46), 2 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 83 [2022-12-14 09:00:14,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:00:14,712 INFO L225 Difference]: With dead ends: 303 [2022-12-14 09:00:14,712 INFO L226 Difference]: Without dead ends: 295 [2022-12-14 09:00:14,714 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 198 SyntacticMatches, 6 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1167 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=562, Invalid=3598, Unknown=0, NotChecked=0, Total=4160 [2022-12-14 09:00:14,715 INFO L413 NwaCegarLoop]: 151 mSDtfsCounter, 67 mSDsluCounter, 2016 mSDsCounter, 0 mSdLazyCounter, 686 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 2167 SdHoareTripleChecker+Invalid, 702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 686 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 09:00:14,715 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 2167 Invalid, 702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 686 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 09:00:14,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2022-12-14 09:00:14,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 295. [2022-12-14 09:00:14,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 195 states have (on average 1.6923076923076923) internal successors, (330), 276 states have internal predecessors, (330), 12 states have call successors, (12), 6 states have call predecessors, (12), 6 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-12-14 09:00:14,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 354 transitions. [2022-12-14 09:00:14,724 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 354 transitions. Word has length 83 [2022-12-14 09:00:14,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:00:14,725 INFO L495 AbstractCegarLoop]: Abstraction has 295 states and 354 transitions. [2022-12-14 09:00:14,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 23 states have internal predecessors, (46), 2 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-12-14 09:00:14,725 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 354 transitions. [2022-12-14 09:00:14,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-12-14 09:00:14,727 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:00:14,727 INFO L195 NwaCegarLoop]: trace histogram [66, 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 09:00:14,747 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7891013-185b-4c2a-a6ad-7898d83d81cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-14 09:00:14,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7891013-185b-4c2a-a6ad-7898d83d81cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-14 09:00:14,928 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2022-12-14 09:00:14,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:00:14,930 INFO L85 PathProgramCache]: Analyzing trace with hash 1613218050, now seen corresponding path program 4 times [2022-12-14 09:00:14,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:00:14,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039585709] [2022-12-14 09:00:14,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:00:14,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:00:14,984 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 09:00:14,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [393749944] [2022-12-14 09:00:14,984 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 09:00:14,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:00:14,985 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7891013-185b-4c2a-a6ad-7898d83d81cd/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:00:14,985 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7891013-185b-4c2a-a6ad-7898d83d81cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:00:14,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7891013-185b-4c2a-a6ad-7898d83d81cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-14 09:00:25,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:00:25,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 1533 conjuncts, 89 conjunts are in the unsatisfiable core [2022-12-14 09:00:25,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:00:25,357 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 09:00:38,692 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_1882 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_1882) |c_#length|) (= (select |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|) 0))) is different from true [2022-12-14 09:00:38,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:00:38,815 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 09:00:38,820 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-14 09:00:38,820 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 09:00:39,291 INFO L134 CoverageAnalysis]: Checked inductivity of 2616 backedges. 1027 proven. 573 refuted. 0 times theorem prover too weak. 701 trivial. 315 not checked. [2022-12-14 09:00:39,291 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:00:41,602 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:00:41,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039585709] [2022-12-14 09:00:41,602 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 09:00:41,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393749944] [2022-12-14 09:00:41,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [393749944] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:00:41,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1501088421] [2022-12-14 09:00:41,605 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2022-12-14 09:00:41,605 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:00:41,605 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:00:41,605 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:00:41,606 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:00:41,627 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 09:00:41,632 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 09:00:41,691 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 09:00:41,750 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 09:00:41,784 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 09:00:41,811 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 09:00:41,820 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 09:00:41,828 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 09:00:41,858 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 09:00:41,863 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 09:00:41,869 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 09:00:41,890 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 09:00:41,895 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 09:00:41,925 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 09:00:41,940 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 09:00:42,890 INFO L197 IcfgInterpreter]: Interpreting procedure zalloc_or_die with input of size 81 for LOIs [2022-12-14 09:00:42,918 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 09:00:42,935 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 09:00:43,007 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 11 treesize of output 7 [2022-12-14 09:00:43,022 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 13 treesize of output 9 [2022-12-14 09:00:43,055 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 11 treesize of output 7 [2022-12-14 09:00:43,087 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 09:00:43,093 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 09:00:43,109 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 09:00:43,115 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:01:22,787 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7442#(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_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)) (= |ULTIMATE.start_l2_insert_~owner#1.base| |ULTIMATE.start_l2_insert_#in~owner#1.base|) (= (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|) (= |ULTIMATE.start_l4_insert_#in~owner#1.offset| |ULTIMATE.start_l4_insert_~owner#1.offset|) (= |ULTIMATE.start_l4_insert_~owner#1.base| |ULTIMATE.start_l4_insert_#in~owner#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_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_l4_insert_#in~owner#1.offset| 8) (<= |ULTIMATE.start_l0_insert_~list#1.base| 3) (= |ULTIMATE.start_l0_insert_~list#1.base| |ULTIMATE.start_l0_insert_#in~list#1.base|) (= |ULTIMATE.start_l1_insert_~list#1.base| |ULTIMATE.start_l2_insert_#in~owner#1.base|) (= |ULTIMATE.start_l2_insert_#in~owner#1.offset| |ULTIMATE.start_l2_insert_~owner#1.offset|) (= |ULTIMATE.start_l4_insert_#t~ret7#1.offset| 0) (<= 0 |ULTIMATE.start_l4_insert_~list#1.offset|) (= |ULTIMATE.start_l0_insert_~item~4#1.offset| 0) (= (select |ULTIMATE.start_main_old_#valid#1| 0) 0) (<= 4 |ULTIMATE.start_l1_insert_~list#1.offset|) (<= |ULTIMATE.start_l2_insert_~owner#1.offset| 4) (= |ULTIMATE.start_l1_insert_~list#1.offset| |ULTIMATE.start_l2_insert_#in~owner#1.offset|) (<= 3 |ULTIMATE.start_l0_insert_~list#1.base|) (= |ULTIMATE.start_l1_insert_~item~3#1.offset| 0) (= |ULTIMATE.start_l0_insert_~list#1.offset| |ULTIMATE.start_l0_insert_#in~list#1.offset|) (= (+ |ULTIMATE.start_l0_insert_~item~4#1.offset| 4) |ULTIMATE.start_l1_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~owner#1.offset| |ULTIMATE.start_l3_insert_~list#1.offset|) (<= |ULTIMATE.start_l4_insert_#in~list#1.offset| 0) (<= 8 |ULTIMATE.start_l4_insert_#in~owner#1.offset|) (= |ULTIMATE.start_l2_insert_~item~2#1.offset| 0) (= |ULTIMATE.start_l3_insert_~list#1.base| |ULTIMATE.start_l4_insert_#in~owner#1.base|) (<= 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) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 09:01:22,787 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 09:01:22,787 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-12-14 09:01:22,787 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2022-12-14 09:01:22,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476778834] [2022-12-14 09:01:22,787 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-12-14 09:01:22,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-12-14 09:01:22,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:01:22,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-12-14 09:01:22,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=2971, Unknown=8, NotChecked=110, Total=3306 [2022-12-14 09:01:22,789 INFO L87 Difference]: Start difference. First operand 295 states and 354 transitions. Second operand has 34 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 31 states have internal predecessors, (50), 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 09:01:24,817 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 09:01:26,842 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-14 09:01:29,078 WARN L539 Checker$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 09:01:33,268 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-14 09:01:37,498 WARN L539 Checker$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 09:01:39,680 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-14 09:01:41,832 WARN L539 Checker$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 09:01:43,974 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-14 09:01:46,140 WARN L539 Checker$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 09:01:50,288 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-14 09:01:52,481 WARN L539 Checker$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 09:01:54,719 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-14 09:01:56,848 WARN L539 Checker$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 09:01:58,882 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-14 09:02:01,005 WARN L539 Checker$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 09:02:05,105 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-14 09:02:07,180 WARN L539 Checker$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 09:02:09,278 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-14 09:02:13,372 WARN L539 Checker$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 09:02:15,429 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-14 09:02:17,404 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.88s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-14 09:02:21,553 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-14 09:02:23,613 WARN L539 Checker$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 09:02:32,592 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-14 09:02:34,652 WARN L539 Checker$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 09:02:47,982 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-14 09:02:50,705 WARN L539 Checker$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 09:02:52,852 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-14 09:02:54,940 WARN L539 Checker$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 09:02:57,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:02:57,346 INFO L93 Difference]: Finished difference Result 366 states and 443 transitions. [2022-12-14 09:02:57,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-12-14 09:02:57,346 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 31 states have internal predecessors, (50), 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 114 [2022-12-14 09:02:57,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:02:57,349 INFO L225 Difference]: With dead ends: 366 [2022-12-14 09:02:57,349 INFO L226 Difference]: Without dead ends: 366 [2022-12-14 09:02:57,350 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 167 SyntacticMatches, 6 SemanticMatches, 73 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1215 ImplicationChecksByTransitivity, 84.0s TimeCoverageRelationStatistics Valid=355, Invalid=5031, Unknown=20, NotChecked=144, Total=5550 [2022-12-14 09:02:57,350 INFO L413 NwaCegarLoop]: 104 mSDtfsCounter, 223 mSDsluCounter, 2089 mSDsCounter, 0 mSdLazyCounter, 3499 mSolverCounterSat, 19 mSolverCounterUnsat, 28 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 65.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 2193 SdHoareTripleChecker+Invalid, 3755 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 3499 IncrementalHoareTripleChecker+Invalid, 28 IncrementalHoareTripleChecker+Unknown, 209 IncrementalHoareTripleChecker+Unchecked, 65.8s IncrementalHoareTripleChecker+Time [2022-12-14 09:02:57,350 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [223 Valid, 2193 Invalid, 3755 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 3499 Invalid, 28 Unknown, 209 Unchecked, 65.8s Time] [2022-12-14 09:02:57,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2022-12-14 09:02:57,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 291. [2022-12-14 09:02:57,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 195 states have (on average 1.6512820512820512) internal successors, (322), 272 states have internal predecessors, (322), 12 states have call successors, (12), 6 states have call predecessors, (12), 6 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-12-14 09:02:57,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 346 transitions. [2022-12-14 09:02:57,356 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 346 transitions. Word has length 114 [2022-12-14 09:02:57,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:02:57,356 INFO L495 AbstractCegarLoop]: Abstraction has 291 states and 346 transitions. [2022-12-14 09:02:57,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 31 states have internal predecessors, (50), 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 09:02:57,357 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 346 transitions. [2022-12-14 09:02:57,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-12-14 09:02:57,357 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:02:57,358 INFO L195 NwaCegarLoop]: trace histogram [66, 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 09:02:57,411 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7891013-185b-4c2a-a6ad-7898d83d81cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-12-14 09:02:57,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7891013-185b-4c2a-a6ad-7898d83d81cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-12-14 09:02:57,558 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2022-12-14 09:02:57,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:02:57,559 INFO L85 PathProgramCache]: Analyzing trace with hash -180340027, now seen corresponding path program 1 times [2022-12-14 09:02:57,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:02:57,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499179537] [2022-12-14 09:02:57,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:02:57,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:02:57,608 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 09:02:57,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [83041333] [2022-12-14 09:02:57,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:02:57,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:02:57,608 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7891013-185b-4c2a-a6ad-7898d83d81cd/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:02:57,609 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7891013-185b-4c2a-a6ad-7898d83d81cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:02:57,613 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7891013-185b-4c2a-a6ad-7898d83d81cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-14 09:02:57,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:02:57,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 1557 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-14 09:02:57,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:02:57,922 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 09:02:57,929 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 09:02:57,935 INFO L134 CoverageAnalysis]: Checked inductivity of 2616 backedges. 782 proven. 0 refuted. 0 times theorem prover too weak. 1834 trivial. 0 not checked. [2022-12-14 09:02:57,935 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 09:02:57,935 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:02:57,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499179537] [2022-12-14 09:02:57,935 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 09:02:57,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83041333] [2022-12-14 09:02:57,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [83041333] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:02:57,935 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:02:57,935 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-14 09:02:57,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030926634] [2022-12-14 09:02:57,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:02:57,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 09:02:57,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:02:57,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 09:02:57,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-12-14 09:02:57,936 INFO L87 Difference]: Start difference. First operand 291 states and 346 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 09:02:58,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:02:58,163 INFO L93 Difference]: Finished difference Result 292 states and 346 transitions. [2022-12-14 09:02:58,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 09:02:58,163 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 116 [2022-12-14 09:02:58,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:02:58,164 INFO L225 Difference]: With dead ends: 292 [2022-12-14 09:02:58,164 INFO L226 Difference]: Without dead ends: 292 [2022-12-14 09:02:58,164 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 110 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 09:02:58,165 INFO L413 NwaCegarLoop]: 146 mSDtfsCounter, 19 mSDsluCounter, 603 mSDsCounter, 0 mSdLazyCounter, 493 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 749 SdHoareTripleChecker+Invalid, 498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 493 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 09:02:58,165 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 749 Invalid, 498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 493 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 09:02:58,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2022-12-14 09:02:58,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 290. [2022-12-14 09:02:58,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 195 states have (on average 1.641025641025641) internal successors, (320), 271 states have internal predecessors, (320), 12 states have call successors, (12), 6 states have call predecessors, (12), 6 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-12-14 09:02:58,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 344 transitions. [2022-12-14 09:02:58,169 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 344 transitions. Word has length 116 [2022-12-14 09:02:58,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:02:58,170 INFO L495 AbstractCegarLoop]: Abstraction has 290 states and 344 transitions. [2022-12-14 09:02:58,170 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 09:02:58,170 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 344 transitions. [2022-12-14 09:02:58,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-12-14 09:02:58,170 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:02:58,170 INFO L195 NwaCegarLoop]: trace histogram [66, 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 09:02:58,179 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7891013-185b-4c2a-a6ad-7898d83d81cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-14 09:02:58,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7891013-185b-4c2a-a6ad-7898d83d81cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:02:58,372 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2022-12-14 09:02:58,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:02:58,373 INFO L85 PathProgramCache]: Analyzing trace with hash -180340026, now seen corresponding path program 1 times [2022-12-14 09:02:58,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:02:58,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131535098] [2022-12-14 09:02:58,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:02:58,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:02:58,569 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 09:02:58,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [881225051] [2022-12-14 09:02:58,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:02:58,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:02:58,570 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7891013-185b-4c2a-a6ad-7898d83d81cd/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:02:58,571 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7891013-185b-4c2a-a6ad-7898d83d81cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:02:58,572 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7891013-185b-4c2a-a6ad-7898d83d81cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-14 09:03:02,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:03:02,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 1557 conjuncts, 68 conjunts are in the unsatisfiable core [2022-12-14 09:03:02,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:03:02,544 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 09:03:08,375 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 09:03:08,404 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 09:03:08,977 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 09:03:09,053 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 09:03:09,583 INFO L134 CoverageAnalysis]: Checked inductivity of 2616 backedges. 694 proven. 536 refuted. 0 times theorem prover too weak. 1386 trivial. 0 not checked. [2022-12-14 09:03:09,583 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:03:12,659 INFO L134 CoverageAnalysis]: Checked inductivity of 2616 backedges. 824 proven. 21 refuted. 0 times theorem prover too weak. 1771 trivial. 0 not checked. [2022-12-14 09:03:12,659 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:03:12,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131535098] [2022-12-14 09:03:12,660 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 09:03:12,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881225051] [2022-12-14 09:03:12,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [881225051] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:03:12,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [200628522] [2022-12-14 09:03:12,661 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2022-12-14 09:03:12,661 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:03:12,661 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:03:12,661 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:03:12,661 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:03:12,685 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 09:03:12,691 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 09:03:12,730 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 09:03:12,766 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 09:03:12,779 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 09:03:12,811 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 09:03:12,821 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 09:03:12,831 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 09:03:12,862 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 09:03:12,867 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 09:03:12,873 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 09:03:12,896 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 09:03:12,908 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 09:03:12,933 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 09:03:12,937 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 09:03:13,913 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 09:03:13,925 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 09:03:13,942 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 09:03:14,051 INFO L197 IcfgInterpreter]: Interpreting procedure zalloc_or_die with input of size 81 for LOIs [2022-12-14 09:03:14,077 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 09:03:14,100 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 09:03:14,190 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 09:03:14,207 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 13 treesize of output 9 [2022-12-14 09:03:14,226 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 09:03:14,260 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 09:03:14,266 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 14 treesize of output 10 [2022-12-14 09:03:14,275 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 09:03:14,282 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:03:44,562 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9822#(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_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)) (= |ULTIMATE.start_l2_insert_~owner#1.base| |ULTIMATE.start_l2_insert_#in~owner#1.base|) (= (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|) (= |ULTIMATE.start_l4_insert_#in~owner#1.offset| |ULTIMATE.start_l4_insert_~owner#1.offset|) (= |ULTIMATE.start_l4_insert_~owner#1.base| |ULTIMATE.start_l4_insert_#in~owner#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_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_l4_insert_#in~owner#1.offset| 8) (= (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|) (= |ULTIMATE.start_l1_insert_~list#1.base| |ULTIMATE.start_l2_insert_#in~owner#1.base|) (= |ULTIMATE.start_l2_insert_#in~owner#1.offset| |ULTIMATE.start_l2_insert_~owner#1.offset|) (<= 0 |ULTIMATE.start_l4_insert_~list#1.offset|) (= |ULTIMATE.start_l0_insert_~item~4#1.offset| 0) (= (select |ULTIMATE.start_main_old_#valid#1| 0) 0) (<= 4 |ULTIMATE.start_l1_insert_~list#1.offset|) (<= |ULTIMATE.start_l2_insert_~owner#1.offset| 4) (= |ULTIMATE.start_l1_insert_~list#1.offset| |ULTIMATE.start_l2_insert_#in~owner#1.offset|) (<= 3 |ULTIMATE.start_l0_insert_~list#1.base|) (= |ULTIMATE.start_l1_insert_~item~3#1.offset| 0) (= |ULTIMATE.start_l0_insert_~list#1.offset| |ULTIMATE.start_l0_insert_#in~list#1.offset|) (= (+ |ULTIMATE.start_l0_insert_~item~4#1.offset| 4) |ULTIMATE.start_l1_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~owner#1.offset| |ULTIMATE.start_l3_insert_~list#1.offset|) (<= |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|))) (<= 8 |ULTIMATE.start_l4_insert_#in~owner#1.offset|) (= |ULTIMATE.start_l2_insert_~item~2#1.offset| 0) (= |ULTIMATE.start_l3_insert_~list#1.base| |ULTIMATE.start_l4_insert_#in~owner#1.base|) (<= 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) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 09:03:44,562 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 09:03:44,562 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 09:03:44,562 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 14] total 34 [2022-12-14 09:03:44,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501358615] [2022-12-14 09:03:44,563 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 09:03:44,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-12-14 09:03:44,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:03:44,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-12-14 09:03:44,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=3114, Unknown=3, NotChecked=0, Total=3422 [2022-12-14 09:03:44,565 INFO L87 Difference]: Start difference. First operand 290 states and 344 transitions. Second operand has 35 states, 32 states have (on average 1.6875) internal successors, (54), 33 states have internal predecessors, (54), 1 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (7), 3 states have call predecessors, (7), 1 states have call successors, (7) [2022-12-14 09:03:49,265 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-14 09:03:53,858 WARN L539 Checker$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 09:03:58,928 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 09:04:21,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:04:21,987 INFO L93 Difference]: Finished difference Result 293 states and 348 transitions. [2022-12-14 09:04:21,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-14 09:04:21,988 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 32 states have (on average 1.6875) internal successors, (54), 33 states have internal predecessors, (54), 1 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (7), 3 states have call predecessors, (7), 1 states have call successors, (7) Word has length 116 [2022-12-14 09:04:21,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:04:21,989 INFO L225 Difference]: With dead ends: 293 [2022-12-14 09:04:21,989 INFO L226 Difference]: Without dead ends: 293 [2022-12-14 09:04:21,989 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 283 SyntacticMatches, 6 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1136 ImplicationChecksByTransitivity, 66.0s TimeCoverageRelationStatistics Valid=412, Invalid=4002, Unknown=8, NotChecked=0, Total=4422 [2022-12-14 09:04:21,990 INFO L413 NwaCegarLoop]: 153 mSDtfsCounter, 24 mSDsluCounter, 2879 mSDsCounter, 0 mSdLazyCounter, 1617 mSolverCounterSat, 0 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 3032 SdHoareTripleChecker+Invalid, 1620 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1617 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.7s IncrementalHoareTripleChecker+Time [2022-12-14 09:04:21,990 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 3032 Invalid, 1620 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1617 Invalid, 3 Unknown, 0 Unchecked, 9.7s Time] [2022-12-14 09:04:21,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2022-12-14 09:04:21,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 289. [2022-12-14 09:04:21,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 195 states have (on average 1.6307692307692307) internal successors, (318), 270 states have internal predecessors, (318), 12 states have call successors, (12), 6 states have call predecessors, (12), 6 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-12-14 09:04:21,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 342 transitions. [2022-12-14 09:04:21,994 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 342 transitions. Word has length 116 [2022-12-14 09:04:21,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:04:21,994 INFO L495 AbstractCegarLoop]: Abstraction has 289 states and 342 transitions. [2022-12-14 09:04:21,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 32 states have (on average 1.6875) internal successors, (54), 33 states have internal predecessors, (54), 1 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (7), 3 states have call predecessors, (7), 1 states have call successors, (7) [2022-12-14 09:04:21,995 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 342 transitions. [2022-12-14 09:04:21,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-12-14 09:04:21,995 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:04:21,995 INFO L195 NwaCegarLoop]: trace histogram [66, 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 09:04:22,037 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7891013-185b-4c2a-a6ad-7898d83d81cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-14 09:04:22,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7891013-185b-4c2a-a6ad-7898d83d81cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-12-14 09:04:22,197 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2022-12-14 09:04:22,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:04:22,198 INFO L85 PathProgramCache]: Analyzing trace with hash -1507761299, now seen corresponding path program 1 times [2022-12-14 09:04:22,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:04:22,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419001448] [2022-12-14 09:04:22,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:04:22,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:04:22,276 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 09:04:22,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1681211613] [2022-12-14 09:04:22,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:04:22,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:04:22,276 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7891013-185b-4c2a-a6ad-7898d83d81cd/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:04:22,277 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7891013-185b-4c2a-a6ad-7898d83d81cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:04:22,278 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7891013-185b-4c2a-a6ad-7898d83d81cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-14 09:04:22,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:04:22,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 1589 conjuncts, 33 conjunts are in the unsatisfiable core [2022-12-14 09:04:22,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:04:22,703 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_4404 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_4404)) (= (select |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|) 0))) is different from true [2022-12-14 09:04:22,757 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 09:04:22,757 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 09:04:22,767 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_4405 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_4405)) (= (select |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|) 0))) is different from true [2022-12-14 09:04:22,822 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 09:04:22,822 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 09:04:22,829 INFO L134 CoverageAnalysis]: Checked inductivity of 2616 backedges. 1322 proven. 0 refuted. 0 times theorem prover too weak. 778 trivial. 516 not checked. [2022-12-14 09:04:22,829 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:04:22,870 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:04:22,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419001448] [2022-12-14 09:04:22,870 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 09:04:22,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681211613] [2022-12-14 09:04:22,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1681211613] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:04:22,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1573923308] [2022-12-14 09:04:22,872 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2022-12-14 09:04:22,872 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:04:22,872 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:04:22,872 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:04:22,872 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:04:22,890 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 09:04:22,895 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 09:04:22,907 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 09:04:22,915 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 09:04:22,924 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 09:04:22,968 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-12-14 09:04:22,968 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 09:04:23,019 INFO L321 Elim1Store]: treesize reduction 15, result has 42.3 percent of original size [2022-12-14 09:04:23,019 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 09:04:23,067 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-12-14 09:04:23,067 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 09:04:23,147 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 09:04:23,151 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 09:04:23,155 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 09:04:23,173 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 09:04:23,176 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 09:04:23,198 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 09:04:23,202 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 09:04:23,942 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 09:04:23,964 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 09:04:23,985 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 09:04:24,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:04:24,064 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 09:04:24,094 INFO L321 Elim1Store]: treesize reduction 43, result has 17.3 percent of original size [2022-12-14 09:04:24,094 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 09:04:24,108 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 09:04:24,182 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 09:04:24,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:04:24,221 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-12-14 09:04:24,221 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 09:04:24,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:04:24,255 INFO L321 Elim1Store]: treesize reduction 25, result has 47.9 percent of original size [2022-12-14 09:04:24,255 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 46 [2022-12-14 09:04:24,370 INFO L197 IcfgInterpreter]: Interpreting procedure zalloc_or_die with input of size 81 for LOIs [2022-12-14 09:04:24,398 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 09:04:24,429 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 09:04:24,531 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 14 treesize of output 10 [2022-12-14 09:04:24,545 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 09:04:24,580 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 09:04:24,606 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 16 treesize of output 12 [2022-12-14 09:04:24,612 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 09:04:24,619 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 09:04:24,625 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:04:32,169 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10825#(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_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)) (= |ULTIMATE.start_l2_insert_~owner#1.base| |ULTIMATE.start_l2_insert_#in~owner#1.base|) (= (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|) (= |ULTIMATE.start_l4_insert_#in~owner#1.offset| |ULTIMATE.start_l4_insert_~owner#1.offset|) (= |ULTIMATE.start_l4_insert_~owner#1.base| |ULTIMATE.start_l4_insert_#in~owner#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|) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_l4_insert_~item~0#1.base|) |ULTIMATE.start_l4_insert_~item~0#1.offset|) |ULTIMATE.start_l4_insert_~owner#1.offset|) (not (= 0 (select (select |#memory_$Pointer$.base| |ULTIMATE.start_l4_insert_~item~0#1.base|) (+ 8 |ULTIMATE.start_l4_insert_~item~0#1.offset|)))) (<= (+ 12 |ULTIMATE.start_l4_insert_~item~0#1.offset|) (select |#length| |ULTIMATE.start_l4_insert_~item~0#1.base|)) (= |ULTIMATE.start_l1_insert_~list#1.base| |ULTIMATE.start_l1_insert_#in~list#1.base|) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_l4_insert_~item~0#1.base|) |ULTIMATE.start_l4_insert_~item~0#1.offset|) |ULTIMATE.start_l4_insert_~owner#1.base|) (= (+ 8 |ULTIMATE.start_l2_insert_~item~2#1.offset|) |ULTIMATE.start_l3_insert_#in~list#1.offset|) (<= |ULTIMATE.start_l0_insert_~list#1.offset| 0) (<= |ULTIMATE.start_l4_insert_~list#1.offset| 0) (= |ULTIMATE.start_l0_insert_#in~list#1.base| |~#list~0.base|) (= |ULTIMATE.start_l2_insert_~list#1.base| |ULTIMATE.start_l2_insert_#in~list#1.base|) (<= |ULTIMATE.start_l4_insert_#in~owner#1.offset| 8) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_l4_insert_~item~0#1.base|) (+ 8 |ULTIMATE.start_l4_insert_~item~0#1.offset|)) 0) (<= |ULTIMATE.start_l0_insert_~list#1.base| 3) (= |ULTIMATE.start_l0_insert_~list#1.base| |ULTIMATE.start_l0_insert_#in~list#1.base|) (= |ULTIMATE.start_l1_insert_~list#1.base| |ULTIMATE.start_l2_insert_#in~owner#1.base|) (= |ULTIMATE.start_l2_insert_#in~owner#1.offset| |ULTIMATE.start_l2_insert_~owner#1.offset|) (<= 0 |ULTIMATE.start_l4_insert_~list#1.offset|) (or (= (select (select |#memory_$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$.base| |ULTIMATE.start_l4_insert_~item~0#1.base|) (+ 8 |ULTIMATE.start_l4_insert_~item~0#1.offset|)))) (= |ULTIMATE.start_l0_insert_~item~4#1.offset| 0) (= (select |ULTIMATE.start_main_old_#valid#1| 0) 0) (<= 4 |ULTIMATE.start_l1_insert_~list#1.offset|) (<= |ULTIMATE.start_l2_insert_~owner#1.offset| 4) (= |ULTIMATE.start_l1_insert_~list#1.offset| |ULTIMATE.start_l2_insert_#in~owner#1.offset|) (<= 3 |ULTIMATE.start_l0_insert_~list#1.base|) (= |ULTIMATE.start_l1_insert_~item~3#1.offset| 0) (= |ULTIMATE.start_l0_insert_~list#1.offset| |ULTIMATE.start_l0_insert_#in~list#1.offset|) (= (+ |ULTIMATE.start_l0_insert_~item~4#1.offset| 4) |ULTIMATE.start_l1_insert_#in~list#1.offset|) (= |ULTIMATE.start_l1_insert_~item~3#1.offset| |ULTIMATE.start_l2_insert_#in~list#1.offset|) (= |#NULL.offset| 0) (= |ULTIMATE.start_l4_insert_#in~owner#1.offset| |ULTIMATE.start_l3_insert_~list#1.offset|) (<= |ULTIMATE.start_l4_insert_#in~list#1.offset| 0) (or (= (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_l4_insert_~item~0#1.base|) (+ 8 |ULTIMATE.start_l4_insert_~item~0#1.offset|))) 0) |ULTIMATE.start_l4_insert_~item~0#1.offset|) (= |ULTIMATE.start_l4_insert_~item~0#1.base| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_l4_insert_~item~0#1.base|) (+ 8 |ULTIMATE.start_l4_insert_~item~0#1.offset|)))) (<= 8 |ULTIMATE.start_l4_insert_#in~owner#1.offset|) (= |ULTIMATE.start_l2_insert_~item~2#1.offset| 0) (= |ULTIMATE.start_l3_insert_~list#1.base| |ULTIMATE.start_l4_insert_#in~owner#1.base|) (<= 4 (select |#length| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_l4_insert_~item~0#1.base|) (+ 8 |ULTIMATE.start_l4_insert_~item~0#1.offset|)))) (<= 0 |ULTIMATE.start_l4_insert_#in~list#1.offset|) (= |ULTIMATE.start_l3_insert_~list#1.base| |ULTIMATE.start_l3_insert_#in~list#1.base|) (= (select |#valid| (select (select |#memory_$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) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 09:04:32,169 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 09:04:32,169 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-12-14 09:04:32,170 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2022-12-14 09:04:32,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271990862] [2022-12-14 09:04:32,170 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-12-14 09:04:32,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-14 09:04:32,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:04:32,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-14 09:04:32,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=1073, Unknown=2, NotChecked=138, Total=1406 [2022-12-14 09:04:32,171 INFO L87 Difference]: Start difference. First operand 289 states and 342 transitions. Second operand has 11 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-12-14 09:04:32,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:04:32,538 INFO L93 Difference]: Finished difference Result 316 states and 368 transitions. [2022-12-14 09:04:32,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-14 09:04:32,539 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 118 [2022-12-14 09:04:32,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:04:32,541 INFO L225 Difference]: With dead ends: 316 [2022-12-14 09:04:32,541 INFO L226 Difference]: Without dead ends: 316 [2022-12-14 09:04:32,541 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 200 SyntacticMatches, 6 SemanticMatches, 41 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=220, Invalid=1426, Unknown=2, NotChecked=158, Total=1806 [2022-12-14 09:04:32,541 INFO L413 NwaCegarLoop]: 118 mSDtfsCounter, 189 mSDsluCounter, 599 mSDsCounter, 0 mSdLazyCounter, 639 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 717 SdHoareTripleChecker+Invalid, 1054 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 639 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 398 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 09:04:32,542 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [189 Valid, 717 Invalid, 1054 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 639 Invalid, 0 Unknown, 398 Unchecked, 0.3s Time] [2022-12-14 09:04:32,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2022-12-14 09:04:32,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 285. [2022-12-14 09:04:32,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 195 states have (on average 1.5897435897435896) internal successors, (310), 266 states have internal predecessors, (310), 12 states have call successors, (12), 6 states have call predecessors, (12), 6 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-12-14 09:04:32,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 334 transitions. [2022-12-14 09:04:32,546 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 334 transitions. Word has length 118 [2022-12-14 09:04:32,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:04:32,546 INFO L495 AbstractCegarLoop]: Abstraction has 285 states and 334 transitions. [2022-12-14 09:04:32,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-12-14 09:04:32,546 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 334 transitions. [2022-12-14 09:04:32,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-12-14 09:04:32,547 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:04:32,547 INFO L195 NwaCegarLoop]: trace histogram [66, 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 09:04:32,556 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7891013-185b-4c2a-a6ad-7898d83d81cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-12-14 09:04:32,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7891013-185b-4c2a-a6ad-7898d83d81cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-14 09:04:32,748 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2022-12-14 09:04:32,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:04:32,748 INFO L85 PathProgramCache]: Analyzing trace with hash -1507761298, now seen corresponding path program 1 times [2022-12-14 09:04:32,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:04:32,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881033617] [2022-12-14 09:04:32,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:04:32,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:04:32,793 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 09:04:32,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1552208269] [2022-12-14 09:04:32,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:04:32,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:04:32,794 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7891013-185b-4c2a-a6ad-7898d83d81cd/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:04:32,794 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7891013-185b-4c2a-a6ad-7898d83d81cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:04:32,795 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7891013-185b-4c2a-a6ad-7898d83d81cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-14 09:04:35,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:04:35,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 1589 conjuncts, 89 conjunts are in the unsatisfiable core [2022-12-14 09:04:35,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:04:35,569 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 09:04:44,767 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_5262 Int) (|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int) (v_ArrVal_5263 Int)) (and (= (store |c_old(#length)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_5263) |c_#length|) (= |c_#valid| (store |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_5262)) (= (select |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|) 0))) is different from true [2022-12-14 09:04:44,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:04:44,880 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 09:04:44,922 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 09:04:44,922 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 09:04:45,021 WARN L859 $PredicateComparison]: unable to prove that (exists ((|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int) (v_ArrVal_5264 Int)) (and (= (store |c_old(#length)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_5264) |c_#length|) (= (select |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|) 0))) is different from true [2022-12-14 09:04:45,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:04:45,122 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 09:04:45,128 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-14 09:04:45,128 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 09:04:45,848 INFO L134 CoverageAnalysis]: Checked inductivity of 2616 backedges. 1052 proven. 354 refuted. 0 times theorem prover too weak. 512 trivial. 698 not checked. [2022-12-14 09:04:45,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:04:46,082 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:04:46,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881033617] [2022-12-14 09:04:46,082 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 09:04:46,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552208269] [2022-12-14 09:04:46,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552208269] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:04:46,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1313078214] [2022-12-14 09:04:46,084 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2022-12-14 09:04:46,084 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:04:46,085 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:04:46,085 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:04:46,085 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:04:46,102 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 09:04:46,107 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 09:04:46,147 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 09:04:46,180 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 09:04:46,215 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 09:04:46,287 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-12-14 09:04:46,288 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 09:04:46,339 INFO L321 Elim1Store]: treesize reduction 15, result has 42.3 percent of original size [2022-12-14 09:04:46,340 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 09:04:46,363 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-12-14 09:04:46,363 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 09:04:46,433 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 09:04:46,438 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 09:04:46,443 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 09:04:46,461 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 09:04:46,465 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 09:04:46,493 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 09:04:46,500 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 09:04:47,236 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 09:04:47,252 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 09:04:47,264 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 09:04:47,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:04:47,331 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 09:04:47,351 INFO L321 Elim1Store]: treesize reduction 43, result has 17.3 percent of original size [2022-12-14 09:04:47,351 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 09:04:47,360 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 09:04:47,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:04:47,425 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-12-14 09:04:47,425 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 09:04:47,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:04:47,463 INFO L321 Elim1Store]: treesize reduction 25, result has 47.9 percent of original size [2022-12-14 09:04:47,463 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 46 [2022-12-14 09:04:47,486 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 09:04:47,602 INFO L197 IcfgInterpreter]: Interpreting procedure zalloc_or_die with input of size 81 for LOIs [2022-12-14 09:04:47,632 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 09:04:47,653 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 09:04:47,736 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 16 treesize of output 12 [2022-12-14 09:04:47,754 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 09:04:47,797 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 09:04:47,824 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 16 treesize of output 12 [2022-12-14 09:04:47,830 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 09:04:47,836 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 09:04:47,846 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:05:24,151 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11861#(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_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)) (= |ULTIMATE.start_l2_insert_~owner#1.base| |ULTIMATE.start_l2_insert_#in~owner#1.base|) (= (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|) (= |ULTIMATE.start_l4_insert_#in~owner#1.offset| |ULTIMATE.start_l4_insert_~owner#1.offset|) (= |ULTIMATE.start_l4_insert_~owner#1.base| |ULTIMATE.start_l4_insert_#in~owner#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|) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_l4_insert_~item~0#1.base|) |ULTIMATE.start_l4_insert_~item~0#1.offset|) |ULTIMATE.start_l4_insert_~owner#1.offset|) (not (= 0 (select (select |#memory_$Pointer$.base| |ULTIMATE.start_l4_insert_~item~0#1.base|) (+ 8 |ULTIMATE.start_l4_insert_~item~0#1.offset|)))) (<= (+ 12 |ULTIMATE.start_l4_insert_~item~0#1.offset|) (select |#length| |ULTIMATE.start_l4_insert_~item~0#1.base|)) (= |ULTIMATE.start_l1_insert_~list#1.base| |ULTIMATE.start_l1_insert_#in~list#1.base|) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_l4_insert_~item~0#1.base|) |ULTIMATE.start_l4_insert_~item~0#1.offset|) |ULTIMATE.start_l4_insert_~owner#1.base|) (= (+ 8 |ULTIMATE.start_l2_insert_~item~2#1.offset|) |ULTIMATE.start_l3_insert_#in~list#1.offset|) (<= |ULTIMATE.start_l0_insert_~list#1.offset| 0) (<= |ULTIMATE.start_l4_insert_~list#1.offset| 0) (= |ULTIMATE.start_l0_insert_#in~list#1.base| |~#list~0.base|) (= |ULTIMATE.start_l2_insert_~list#1.base| |ULTIMATE.start_l2_insert_#in~list#1.base|) (<= |ULTIMATE.start_l4_insert_#in~owner#1.offset| 8) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_l4_insert_~item~0#1.base|) (+ 8 |ULTIMATE.start_l4_insert_~item~0#1.offset|)) 0) (< (select |#length| |ULTIMATE.start_l4_insert_~list#1.base|) (+ 4 |ULTIMATE.start_l4_insert_~list#1.offset|)) (<= |ULTIMATE.start_l0_insert_~list#1.base| 3) (= |ULTIMATE.start_l0_insert_~list#1.base| |ULTIMATE.start_l0_insert_#in~list#1.base|) (= |ULTIMATE.start_l1_insert_~list#1.base| |ULTIMATE.start_l2_insert_#in~owner#1.base|) (= |ULTIMATE.start_l2_insert_#in~owner#1.offset| |ULTIMATE.start_l2_insert_~owner#1.offset|) (<= 0 |ULTIMATE.start_l4_insert_~list#1.offset|) (or (= (select (select |#memory_$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$.base| |ULTIMATE.start_l4_insert_~item~0#1.base|) (+ 8 |ULTIMATE.start_l4_insert_~item~0#1.offset|)))) (= |ULTIMATE.start_l0_insert_~item~4#1.offset| 0) (= (select |ULTIMATE.start_main_old_#valid#1| 0) 0) (<= 4 |ULTIMATE.start_l1_insert_~list#1.offset|) (<= |ULTIMATE.start_l2_insert_~owner#1.offset| 4) (= |ULTIMATE.start_l1_insert_~list#1.offset| |ULTIMATE.start_l2_insert_#in~owner#1.offset|) (<= 3 |ULTIMATE.start_l0_insert_~list#1.base|) (= |ULTIMATE.start_l1_insert_~item~3#1.offset| 0) (= |ULTIMATE.start_l0_insert_~list#1.offset| |ULTIMATE.start_l0_insert_#in~list#1.offset|) (= (+ |ULTIMATE.start_l0_insert_~item~4#1.offset| 4) |ULTIMATE.start_l1_insert_#in~list#1.offset|) (= |ULTIMATE.start_l1_insert_~item~3#1.offset| |ULTIMATE.start_l2_insert_#in~list#1.offset|) (= |#NULL.offset| 0) (= |ULTIMATE.start_l4_insert_#in~owner#1.offset| |ULTIMATE.start_l3_insert_~list#1.offset|) (<= |ULTIMATE.start_l4_insert_#in~list#1.offset| 0) (or (= (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_l4_insert_~item~0#1.base|) (+ 8 |ULTIMATE.start_l4_insert_~item~0#1.offset|))) 0) |ULTIMATE.start_l4_insert_~item~0#1.offset|) (= |ULTIMATE.start_l4_insert_~item~0#1.base| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_l4_insert_~item~0#1.base|) (+ 8 |ULTIMATE.start_l4_insert_~item~0#1.offset|)))) (<= 8 |ULTIMATE.start_l4_insert_#in~owner#1.offset|) (= |ULTIMATE.start_l2_insert_~item~2#1.offset| 0) (= |ULTIMATE.start_l3_insert_~list#1.base| |ULTIMATE.start_l4_insert_#in~owner#1.base|) (<= 4 (select |#length| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_l4_insert_~item~0#1.base|) (+ 8 |ULTIMATE.start_l4_insert_~item~0#1.offset|)))) (<= 0 |ULTIMATE.start_l4_insert_#in~list#1.offset|) (= |ULTIMATE.start_l3_insert_~list#1.base| |ULTIMATE.start_l3_insert_#in~list#1.base|) (= (select |#valid| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_l4_insert_~item~0#1.base|) (+ 8 |ULTIMATE.start_l4_insert_~item~0#1.offset|))) 1) (= |ULTIMATE.start_l1_insert_~item~3#1.base| |ULTIMATE.start_l2_insert_#in~list#1.base|) (= |ULTIMATE.start_l3_insert_~item~1#1.offset| 0) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 09:05:24,151 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 09:05:24,151 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-12-14 09:05:24,151 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2022-12-14 09:05:24,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594905479] [2022-12-14 09:05:24,152 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-12-14 09:05:24,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-12-14 09:05:24,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:05:24,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-12-14 09:05:24,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=2518, Unknown=6, NotChecked=206, Total=2970 [2022-12-14 09:05:24,154 INFO L87 Difference]: Start difference. First operand 285 states and 334 transitions. Second operand has 27 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2022-12-14 09:05:26,176 WARN L539 Checker$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 09:05:28,192 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-14 09:05:30,303 WARN L539 Checker$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 09:05:32,421 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-14 09:05:34,584 WARN L539 Checker$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 09:05:38,757 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-14 09:05:40,955 WARN L539 Checker$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 09:05:45,723 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-14 09:05:50,555 WARN L539 Checker$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 09:05:55,837 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-14 09:06:13,884 WARN L539 Checker$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 09:06:15,932 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-14 09:06:23,552 WARN L233 SmtUtils]: Spent 6.49s on a formula simplification. DAG size of input: 53 DAG size of output: 48 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 09:06:39,351 WARN L539 Checker$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 09:06:43,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:06:43,468 INFO L93 Difference]: Finished difference Result 318 states and 370 transitions. [2022-12-14 09:06:43,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-12-14 09:06:43,468 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 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 118 [2022-12-14 09:06:43,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:06:43,469 INFO L225 Difference]: With dead ends: 318 [2022-12-14 09:06:43,469 INFO L226 Difference]: Without dead ends: 318 [2022-12-14 09:06:43,470 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 183 SyntacticMatches, 6 SemanticMatches, 67 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 926 ImplicationChecksByTransitivity, 91.7s TimeCoverageRelationStatistics Valid=348, Invalid=4065, Unknown=17, NotChecked=262, Total=4692 [2022-12-14 09:06:43,471 INFO L413 NwaCegarLoop]: 95 mSDtfsCounter, 373 mSDsluCounter, 1318 mSDsCounter, 0 mSdLazyCounter, 2013 mSolverCounterSat, 23 mSolverCounterUnsat, 13 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 32.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 373 SdHoareTripleChecker+Valid, 1413 SdHoareTripleChecker+Invalid, 2423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 2013 IncrementalHoareTripleChecker+Invalid, 13 IncrementalHoareTripleChecker+Unknown, 374 IncrementalHoareTripleChecker+Unchecked, 32.9s IncrementalHoareTripleChecker+Time [2022-12-14 09:06:43,471 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [373 Valid, 1413 Invalid, 2423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 2013 Invalid, 13 Unknown, 374 Unchecked, 32.9s Time] [2022-12-14 09:06:43,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2022-12-14 09:06:43,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 283. [2022-12-14 09:06:43,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 195 states have (on average 1.5692307692307692) internal successors, (306), 264 states have internal predecessors, (306), 12 states have call successors, (12), 6 states have call predecessors, (12), 6 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-12-14 09:06:43,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 330 transitions. [2022-12-14 09:06:43,475 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 330 transitions. Word has length 118 [2022-12-14 09:06:43,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:06:43,475 INFO L495 AbstractCegarLoop]: Abstraction has 283 states and 330 transitions. [2022-12-14 09:06:43,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 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 09:06:43,475 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 330 transitions. [2022-12-14 09:06:43,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-12-14 09:06:43,476 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:06:43,476 INFO L195 NwaCegarLoop]: trace histogram [66, 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 09:06:43,512 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7891013-185b-4c2a-a6ad-7898d83d81cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-12-14 09:06:43,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7891013-185b-4c2a-a6ad-7898d83d81cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:06:43,678 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2022-12-14 09:06:43,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:06:43,679 INFO L85 PathProgramCache]: Analyzing trace with hash 660004236, now seen corresponding path program 1 times [2022-12-14 09:06:43,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:06:43,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292642487] [2022-12-14 09:06:43,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:06:43,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:06:43,897 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 09:06:43,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [443438476] [2022-12-14 09:06:43,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:06:43,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:06:43,898 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7891013-185b-4c2a-a6ad-7898d83d81cd/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:06:43,899 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7891013-185b-4c2a-a6ad-7898d83d81cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:06:43,900 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7891013-185b-4c2a-a6ad-7898d83d81cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-14 09:06:53,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:06:53,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 1633 conjuncts, 103 conjunts are in the unsatisfiable core [2022-12-14 09:06:53,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:06:53,459 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 09:07:08,624 WARN L859 $PredicateComparison]: unable to prove that (exists ((|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int) (v_ArrVal_6146 Int) (v_ArrVal_6145 Int)) (and (= (store |c_old(#length)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_6146) |c_#length|) (= |c_#valid| (store |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_6145)) (= (select |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|) 0))) is different from true [2022-12-14 09:07:08,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:07:08,695 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 09:07:08,705 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 09:07:08,705 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 09:07:08,808 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_6147 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_6147) |c_#length|) (= (select |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|) 0))) is different from true [2022-12-14 09:07:08,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:07:08,908 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 09:07:08,913 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-14 09:07:08,914 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 09:07:09,883 INFO L134 CoverageAnalysis]: Checked inductivity of 2616 backedges. 981 proven. 430 refuted. 0 times theorem prover too weak. 403 trivial. 802 not checked. [2022-12-14 09:07:09,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:07:14,205 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:07:14,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292642487] [2022-12-14 09:07:14,205 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 09:07:14,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443438476] [2022-12-14 09:07:14,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443438476] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:07:14,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1328287619] [2022-12-14 09:07:14,206 INFO L159 IcfgInterpreter]: Started Sifa with 32 locations of interest [2022-12-14 09:07:14,207 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:07:14,207 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:07:14,207 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:07:14,207 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:07:14,226 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 09:07:14,230 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 09:07:14,242 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 09:07:14,251 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 09:07:14,311 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 09:07:14,402 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-12-14 09:07:14,403 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 09:07:14,428 INFO L321 Elim1Store]: treesize reduction 15, result has 42.3 percent of original size [2022-12-14 09:07:14,429 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 09:07:14,477 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-12-14 09:07:14,477 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 09:07:14,535 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 09:07:14,540 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 16 treesize of output 12 [2022-12-14 09:07:14,545 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 09:07:14,563 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 09:07:14,568 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 09:07:14,590 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 09:07:14,597 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 09:07:15,279 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 09:07:15,290 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 09:07:15,309 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 09:07:15,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:07:15,386 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 09:07:15,411 INFO L321 Elim1Store]: treesize reduction 43, result has 17.3 percent of original size [2022-12-14 09:07:15,411 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 09:07:15,423 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 09:07:15,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:07:15,502 INFO L321 Elim1Store]: treesize reduction 53, result has 30.3 percent of original size [2022-12-14 09:07:15,502 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 75 [2022-12-14 09:07:15,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:07:15,532 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-12-14 09:07:15,532 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 100 treesize of output 79 [2022-12-14 09:07:15,557 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 09:07:15,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:07:15,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:07:15,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:07:15,658 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:07:15,665 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-12-14 09:07:15,665 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 123 treesize of output 98 [2022-12-14 09:07:15,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:07:15,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:07:15,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:07:15,686 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:07:15,702 INFO L321 Elim1Store]: treesize reduction 111, result has 10.5 percent of original size [2022-12-14 09:07:15,702 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 111 treesize of output 104 [2022-12-14 09:07:15,739 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 09:07:15,799 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 15 treesize of output 1 [2022-12-14 09:07:15,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:07:15,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:07:15,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:07:15,840 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:07:15,884 INFO L321 Elim1Store]: treesize reduction 50, result has 53.3 percent of original size [2022-12-14 09:07:15,884 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 64 treesize of output 104 [2022-12-14 09:07:15,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:07:15,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:07:15,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:07:15,909 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:07:15,948 INFO L321 Elim1Store]: treesize reduction 32, result has 54.9 percent of original size [2022-12-14 09:07:15,949 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 143 treesize of output 126 [2022-12-14 09:07:15,993 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2022-12-14 09:07:16,011 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2022-12-14 09:07:16,071 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2022-12-14 09:07:16,152 INFO L197 IcfgInterpreter]: Interpreting procedure zalloc_or_die with input of size 81 for LOIs [2022-12-14 09:07:16,193 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 09:07:16,204 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 09:07:16,272 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 11 treesize of output 7 [2022-12-14 09:07:16,307 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 09:07:16,320 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 09:07:16,350 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 14 treesize of output 10 [2022-12-14 09:07:16,356 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 09:07:16,363 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 16 treesize of output 12 [2022-12-14 09:07:16,370 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:07:57,241 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '12947#(and (<= |~#list~0.base| 3) (<= 8 |ULTIMATE.start_l3_insert_#in~list#1.offset|) (<= 8 |ULTIMATE.start_l4_insert_~owner#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) (<= 4 |ULTIMATE.start_l2_insert_~owner#1.offset|) (<= |ULTIMATE.start_l0_insert_#in~list#1.offset| 0) (<= 4 |ULTIMATE.start_l1_insert_#in~list#1.offset|) (<= 0 |ULTIMATE.start_l2_insert_~item~2#1.offset|) (<= |ULTIMATE.start_l2_insert_#in~owner#1.offset| 4) (<= |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) (<= 4 |ULTIMATE.start_l2_insert_#in~owner#1.offset|) (<= |ULTIMATE.start_l1_insert_~item~3#1.offset| 0) (<= |ULTIMATE.start_l0_insert_#in~list#1.base| 3) (<= |ULTIMATE.start_l1_insert_~list#1.offset| 4) (<= 0 |ULTIMATE.start_l0_insert_#in~list#1.offset|) (<= |ULTIMATE.start_l4_insert_~owner#1.offset| 8) (<= |#NULL.offset| 0) (<= |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_l4_insert_#in~owner#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|) (<= 3 |ULTIMATE.start_l0_insert_#in~list#1.base|) (<= 0 |ULTIMATE.start_l4_insert_~list#1.offset|) (<= 4 |ULTIMATE.start_l1_insert_~list#1.offset|) (<= 0 |ULTIMATE.start_l0_insert_~item~4#1.offset|) (<= |ULTIMATE.start_l2_insert_~owner#1.offset| 4) (<= |#NULL.base| 0) (<= 3 |ULTIMATE.start_l0_insert_~list#1.base|) (<= |ULTIMATE.start_l1_insert_#in~list#1.offset| 4) (<= |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|) (<= 8 |ULTIMATE.start_l4_insert_#in~owner#1.offset|) (<= 3 |~#list~0.base|) (<= 0 |#NULL.offset|) (<= 0 |ULTIMATE.start_l4_insert_#in~list#1.offset|) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_l4_insert_~item~0#1.offset|) (<= |~#list~0.offset| 0))' at error location [2022-12-14 09:07:57,241 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 09:07:57,241 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-12-14 09:07:57,242 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2022-12-14 09:07:57,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421458237] [2022-12-14 09:07:57,242 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-12-14 09:07:57,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-12-14 09:07:57,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:07:57,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-12-14 09:07:57,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=297, Invalid=3862, Unknown=9, NotChecked=254, Total=4422 [2022-12-14 09:07:57,244 INFO L87 Difference]: Start difference. First operand 283 states and 330 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 09:07:59,261 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 09:08:01,277 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-14 09:08:03,510 WARN L539 Checker$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 09:08:06,229 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-14 09:08:10,418 WARN L539 Checker$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 09:08:12,653 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-14 09:08:14,845 WARN L539 Checker$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 09:08:17,050 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-14 09:08:19,214 WARN L539 Checker$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 09:08:23,387 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-14 09:08:25,747 WARN L539 Checker$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 09:08:27,837 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-14 09:08:30,051 WARN L539 Checker$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 09:08:32,065 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-14 09:08:34,143 WARN L539 Checker$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 09:08:36,317 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-14 09:08:38,332 WARN L539 Checker$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 09:08:40,446 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-14 09:08:44,573 WARN L539 Checker$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 09:08:46,592 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-14 09:08:48,673 WARN L539 Checker$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 09:08:52,809 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-14 09:09:02,178 WARN L539 Checker$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 09:09:04,189 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-14 09:09:16,535 WARN L233 SmtUtils]: Spent 10.86s on a formula simplification. DAG size of input: 53 DAG size of output: 48 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 09:09:24,321 WARN L539 Checker$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 09:09:26,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:09:26,570 INFO L93 Difference]: Finished difference Result 333 states and 392 transitions. [2022-12-14 09:09:26,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-12-14 09:09:26,570 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 122 [2022-12-14 09:09:26,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:09:26,571 INFO L225 Difference]: With dead ends: 333 [2022-12-14 09:09:26,571 INFO L226 Difference]: Without dead ends: 333 [2022-12-14 09:09:26,573 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 182 SyntacticMatches, 6 SemanticMatches, 82 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1480 ImplicationChecksByTransitivity, 91.8s TimeCoverageRelationStatistics Valid=436, Invalid=6197, Unknown=17, NotChecked=322, Total=6972 [2022-12-14 09:09:26,573 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 214 mSDsluCounter, 1634 mSDsCounter, 0 mSdLazyCounter, 2564 mSolverCounterSat, 16 mSolverCounterUnsat, 25 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 57.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 1733 SdHoareTripleChecker+Invalid, 3021 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 2564 IncrementalHoareTripleChecker+Invalid, 25 IncrementalHoareTripleChecker+Unknown, 416 IncrementalHoareTripleChecker+Unchecked, 57.8s IncrementalHoareTripleChecker+Time [2022-12-14 09:09:26,573 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [214 Valid, 1733 Invalid, 3021 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 2564 Invalid, 25 Unknown, 416 Unchecked, 57.8s Time] [2022-12-14 09:09:26,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2022-12-14 09:09:26,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 281. [2022-12-14 09:09:26,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 195 states have (on average 1.5487179487179488) internal successors, (302), 262 states have internal predecessors, (302), 12 states have call successors, (12), 6 states have call predecessors, (12), 6 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-12-14 09:09:26,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 326 transitions. [2022-12-14 09:09:26,577 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 326 transitions. Word has length 122 [2022-12-14 09:09:26,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:09:26,578 INFO L495 AbstractCegarLoop]: Abstraction has 281 states and 326 transitions. [2022-12-14 09:09:26,578 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 09:09:26,578 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 326 transitions. [2022-12-14 09:09:26,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-12-14 09:09:26,578 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:09:26,579 INFO L195 NwaCegarLoop]: trace histogram [66, 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 09:09:26,634 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7891013-185b-4c2a-a6ad-7898d83d81cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-12-14 09:09:26,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7891013-185b-4c2a-a6ad-7898d83d81cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-14 09:09:26,780 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2022-12-14 09:09:26,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:09:26,782 INFO L85 PathProgramCache]: Analyzing trace with hash -1014705152, now seen corresponding path program 1 times [2022-12-14 09:09:26,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:09:26,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035584891] [2022-12-14 09:09:26,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:09:26,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:09:26,994 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 09:09:26,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [261739951] [2022-12-14 09:09:26,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:09:26,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:09:26,995 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7891013-185b-4c2a-a6ad-7898d83d81cd/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:09:26,996 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7891013-185b-4c2a-a6ad-7898d83d81cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:09:26,997 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7891013-185b-4c2a-a6ad-7898d83d81cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-14 09:09:27,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:09:27,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 1649 conjuncts, 40 conjunts are in the unsatisfiable core [2022-12-14 09:09:27,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:09:27,498 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_7039 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_7039)) (= (select |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|) 0))) is different from true [2022-12-14 09:09:27,550 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 09:09:27,550 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 09:09:27,567 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_7040 Int)) (= |c_#valid| (store |c_old(#valid)| |c_zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_7040))) is different from true [2022-12-14 09:09:27,636 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-12-14 09:09:27,636 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 09:09:27,650 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_7041 Int)) (= |c_#valid| (store |c_old(#valid)| |c_zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_7041))) is different from true [2022-12-14 09:09:27,726 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-12-14 09:09:27,726 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 09:09:27,745 INFO L134 CoverageAnalysis]: Checked inductivity of 2616 backedges. 1073 proven. 342 refuted. 0 times theorem prover too weak. 682 trivial. 519 not checked. [2022-12-14 09:09:27,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:09:28,036 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:09:28,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035584891] [2022-12-14 09:09:28,036 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 09:09:28,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261739951] [2022-12-14 09:09:28,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261739951] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:09:28,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1564816789] [2022-12-14 09:09:28,037 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2022-12-14 09:09:28,037 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:09:28,038 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:09:28,038 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:09:28,038 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:09:28,056 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 09:09:28,061 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 09:09:28,072 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 09:09:28,105 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 09:09:28,138 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 09:09:28,203 INFO L321 Elim1Store]: treesize reduction 15, result has 42.3 percent of original size [2022-12-14 09:09:28,204 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 184 treesize of output 187 [2022-12-14 09:09:28,252 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-12-14 09:09:28,252 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 09:09:28,271 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-12-14 09:09:28,272 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 09:09:28,350 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 14 treesize of output 10 [2022-12-14 09:09:28,354 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 09:09:28,359 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 09:09:28,375 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 09:09:28,380 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 09:09:28,398 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 09:09:28,404 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 09:09:29,190 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 09:09:29,199 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 09:09:29,218 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 09:09:29,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:09:29,292 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 09:09:29,316 INFO L321 Elim1Store]: treesize reduction 43, result has 17.3 percent of original size [2022-12-14 09:09:29,316 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 09:09:29,327 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 09:09:29,377 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 09:09:29,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:09:29,419 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-12-14 09:09:29,419 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 09:09:29,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:09:29,447 INFO L321 Elim1Store]: treesize reduction 25, result has 47.9 percent of original size [2022-12-14 09:09:29,447 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 46 [2022-12-14 09:09:29,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:09:29,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:09:29,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:09:29,535 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:09:29,541 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-12-14 09:09:29,541 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 103 treesize of output 78 [2022-12-14 09:09:29,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:09:29,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:09:29,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:09:29,561 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:09:29,567 INFO L321 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2022-12-14 09:09:29,568 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 57 treesize of output 65 [2022-12-14 09:09:29,612 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 09:09:29,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:09:29,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:09:29,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:09:29,672 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:09:29,713 INFO L321 Elim1Store]: treesize reduction 50, result has 53.3 percent of original size [2022-12-14 09:09:29,713 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 64 treesize of output 104 [2022-12-14 09:09:29,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:09:29,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:09:29,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:09:29,744 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:09:29,779 INFO L321 Elim1Store]: treesize reduction 32, result has 54.9 percent of original size [2022-12-14 09:09:29,779 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 143 treesize of output 126 [2022-12-14 09:09:29,835 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 09:09:29,857 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2022-12-14 09:09:29,871 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2022-12-14 09:09:29,946 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 09:09:29,956 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 09:09:29,964 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 09:09:29,975 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2022-12-14 09:09:30,071 INFO L197 IcfgInterpreter]: Interpreting procedure zalloc_or_die with input of size 81 for LOIs [2022-12-14 09:09:30,113 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 09:09:30,136 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 09:09:30,222 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 09:09:30,257 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 09:09:30,276 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 09:09:30,316 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 09:09:30,322 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 14 treesize of output 10 [2022-12-14 09:09:30,331 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 09:09:30,342 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:09:40,411 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '14157#(and (<= |~#list~0.base| 3) (<= 8 |ULTIMATE.start_l3_insert_#in~list#1.offset|) (<= 8 |ULTIMATE.start_l4_insert_~owner#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) (<= 4 |ULTIMATE.start_l2_insert_~owner#1.offset|) (<= |ULTIMATE.start_l0_insert_#in~list#1.offset| 0) (<= 4 |ULTIMATE.start_l1_insert_#in~list#1.offset|) (<= 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~owner#1.offset| 4) (<= |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$.offset| |ULTIMATE.start_l3_insert_~item~1#1.base|) (+ |ULTIMATE.start_l3_insert_~item~1#1.offset| 8))) (<= |ULTIMATE.start_l2_insert_~list#1.offset| 0) (<= 4 |ULTIMATE.start_l2_insert_#in~owner#1.offset|) (<= |ULTIMATE.start_l1_insert_~item~3#1.offset| 0) (<= |ULTIMATE.start_l0_insert_#in~list#1.base| 3) (<= |ULTIMATE.start_l1_insert_~list#1.offset| 4) (<= 0 |ULTIMATE.start_l0_insert_#in~list#1.offset|) (= (select (select |#memory_$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|) (<= |ULTIMATE.start_l4_insert_~owner#1.offset| 8) (<= |#NULL.offset| 0) (<= |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_l4_insert_#in~owner#1.offset| 8) (<= |ULTIMATE.start_l0_insert_~list#1.base| 3) (<= 0 |ULTIMATE.start_l3_insert_~item~1#1.offset|) (<= 3 |ULTIMATE.start_l0_insert_#in~list#1.base|) (<= 0 |ULTIMATE.start_l4_insert_~list#1.offset|) (<= 4 |ULTIMATE.start_l1_insert_~list#1.offset|) (<= 0 |ULTIMATE.start_l0_insert_~item~4#1.offset|) (<= |ULTIMATE.start_l2_insert_~owner#1.offset| 4) (<= |#NULL.base| 0) (<= 3 |ULTIMATE.start_l0_insert_~list#1.base|) (<= |ULTIMATE.start_l1_insert_#in~list#1.offset| 4) (<= |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|) (<= 8 |ULTIMATE.start_l4_insert_#in~owner#1.offset|) (<= 3 |~#list~0.base|) (<= 0 |#NULL.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|) (<= |~#list~0.offset| 0))' at error location [2022-12-14 09:09:40,411 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 09:09:40,411 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-12-14 09:09:40,411 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2022-12-14 09:09:40,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54511924] [2022-12-14 09:09:40,411 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-12-14 09:09:40,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-14 09:09:40,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:09:40,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-14 09:09:40,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=1662, Unknown=3, NotChecked=258, Total=2162 [2022-12-14 09:09:40,412 INFO L87 Difference]: Start difference. First operand 281 states and 326 transitions. Second operand has 13 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 states have internal predecessors, (43), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-12-14 09:09:41,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:09:41,242 INFO L93 Difference]: Finished difference Result 306 states and 349 transitions. [2022-12-14 09:09:41,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-14 09:09:41,242 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 states have internal predecessors, (43), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 123 [2022-12-14 09:09:41,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:09:41,243 INFO L225 Difference]: With dead ends: 306 [2022-12-14 09:09:41,243 INFO L226 Difference]: Without dead ends: 306 [2022-12-14 09:09:41,244 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 238 SyntacticMatches, 14 SemanticMatches, 52 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=289, Invalid=2270, Unknown=3, NotChecked=300, Total=2862 [2022-12-14 09:09:41,244 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 167 mSDsluCounter, 634 mSDsCounter, 0 mSdLazyCounter, 669 mSolverCounterSat, 22 mSolverCounterUnsat, 40 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 743 SdHoareTripleChecker+Invalid, 1264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 669 IncrementalHoareTripleChecker+Invalid, 40 IncrementalHoareTripleChecker+Unknown, 533 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 09:09:41,244 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [167 Valid, 743 Invalid, 1264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 669 Invalid, 40 Unknown, 533 Unchecked, 0.6s Time] [2022-12-14 09:09:41,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2022-12-14 09:09:41,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 277. [2022-12-14 09:09:41,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 195 states have (on average 1.5076923076923077) internal successors, (294), 258 states have internal predecessors, (294), 12 states have call successors, (12), 6 states have call predecessors, (12), 6 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-12-14 09:09:41,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 318 transitions. [2022-12-14 09:09:41,248 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 318 transitions. Word has length 123 [2022-12-14 09:09:41,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:09:41,248 INFO L495 AbstractCegarLoop]: Abstraction has 277 states and 318 transitions. [2022-12-14 09:09:41,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 states have internal predecessors, (43), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-12-14 09:09:41,249 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 318 transitions. [2022-12-14 09:09:41,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-12-14 09:09:41,249 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:09:41,249 INFO L195 NwaCegarLoop]: trace histogram [66, 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 09:09:41,259 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7891013-185b-4c2a-a6ad-7898d83d81cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-12-14 09:09:41,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7891013-185b-4c2a-a6ad-7898d83d81cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-14 09:09:41,450 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2022-12-14 09:09:41,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:09:41,450 INFO L85 PathProgramCache]: Analyzing trace with hash -1014705151, now seen corresponding path program 1 times [2022-12-14 09:09:41,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:09:41,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026277992] [2022-12-14 09:09:41,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:09:41,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:09:41,500 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 09:09:41,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [252404543] [2022-12-14 09:09:41,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:09:41,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:09:41,500 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7891013-185b-4c2a-a6ad-7898d83d81cd/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:09:41,501 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7891013-185b-4c2a-a6ad-7898d83d81cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:09:41,502 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7891013-185b-4c2a-a6ad-7898d83d81cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-12-14 09:09:46,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:09:46,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 1649 conjuncts, 129 conjunts are in the unsatisfiable core [2022-12-14 09:09:46,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:09:46,421 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 09:10:04,107 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 09:10:04,107 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 09:10:04,368 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 09:10:04,368 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 09:10:05,768 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 09:10:05,769 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 09:10:05,775 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 09:10:06,728 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_7944 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_7944) |c_#length|) (= (select |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|) 0))) is different from true [2022-12-14 09:10:06,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:10:06,870 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 09:10:06,882 INFO L321 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-12-14 09:10:06,882 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 09:10:08,364 INFO L134 CoverageAnalysis]: Checked inductivity of 2616 backedges. 589 proven. 1089 refuted. 0 times theorem prover too weak. 279 trivial. 659 not checked. [2022-12-14 09:10:08,364 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:10:08,761 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:10:08,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026277992] [2022-12-14 09:10:08,761 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 09:10:08,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252404543] [2022-12-14 09:10:08,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [252404543] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:10:08,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [183019244] [2022-12-14 09:10:08,763 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2022-12-14 09:10:08,763 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:10:08,764 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:10:08,764 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:10:08,764 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:10:08,782 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 09:10:08,787 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 09:10:08,800 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 09:10:08,833 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 09:10:08,893 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 09:10:08,936 INFO L321 Elim1Store]: treesize reduction 15, result has 42.3 percent of original size [2022-12-14 09:10:08,936 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 184 treesize of output 187 [2022-12-14 09:10:08,984 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-12-14 09:10:08,985 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 09:10:09,031 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-12-14 09:10:09,032 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 09:10:09,083 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 09:10:09,088 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 09:10:09,092 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 09:10:09,109 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 09:10:09,114 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 09:10:09,130 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 09:10:09,136 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 09:10:09,833 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 09:10:09,842 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 09:10:09,852 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 09:10:09,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:10:09,920 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 09:10:09,939 INFO L321 Elim1Store]: treesize reduction 43, result has 17.3 percent of original size [2022-12-14 09:10:09,939 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 09:10:09,954 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 09:10:10,011 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 09:10:10,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:10:10,041 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-12-14 09:10:10,041 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 09:10:10,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:10:10,064 INFO L321 Elim1Store]: treesize reduction 25, result has 47.9 percent of original size [2022-12-14 09:10:10,064 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 46 [2022-12-14 09:10:10,138 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 09:10:10,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:10:10,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:10:10,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:10:10,155 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:10:10,160 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-12-14 09:10:10,160 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 103 treesize of output 78 [2022-12-14 09:10:10,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:10:10,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:10:10,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:10:10,179 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:10:10,184 INFO L321 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2022-12-14 09:10:10,184 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 57 treesize of output 65 [2022-12-14 09:10:10,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:10:10,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:10:10,268 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:10:10,303 INFO L321 Elim1Store]: treesize reduction 32, result has 54.9 percent of original size [2022-12-14 09:10:10,303 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 110 treesize of output 105 [2022-12-14 09:10:10,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:10:10,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:10:10,327 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:10:10,372 INFO L321 Elim1Store]: treesize reduction 50, result has 53.3 percent of original size [2022-12-14 09:10:10,372 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 64 treesize of output 104 [2022-12-14 09:10:10,424 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 09:10:10,437 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2022-12-14 09:10:10,446 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2022-12-14 09:10:10,505 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 09:10:10,515 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 13 treesize of output 9 [2022-12-14 09:10:10,534 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 09:10:10,547 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2022-12-14 09:10:10,677 INFO L197 IcfgInterpreter]: Interpreting procedure zalloc_or_die with input of size 81 for LOIs [2022-12-14 09:10:10,715 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 09:10:10,733 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 09:10:10,793 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 09:10:10,833 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 09:10:10,847 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 09:10:10,885 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 09:10:10,892 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 09:10:10,900 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 09:10:10,908 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:11:00,757 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '15229#(and (<= |~#list~0.base| 3) (<= 8 |ULTIMATE.start_l3_insert_#in~list#1.offset|) (<= 8 |ULTIMATE.start_l4_insert_~owner#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) (<= 4 |ULTIMATE.start_l2_insert_~owner#1.offset|) (<= |ULTIMATE.start_l0_insert_#in~list#1.offset| 0) (<= 4 |ULTIMATE.start_l1_insert_#in~list#1.offset|) (<= 0 |ULTIMATE.start_l2_insert_~item~2#1.offset|) (<= |ULTIMATE.start_l2_insert_#in~owner#1.offset| 4) (<= |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$.offset| |ULTIMATE.start_l3_insert_~item~1#1.base|) (+ |ULTIMATE.start_l3_insert_~item~1#1.offset| 8))) (<= |ULTIMATE.start_l2_insert_~list#1.offset| 0) (<= 4 |ULTIMATE.start_l2_insert_#in~owner#1.offset|) (<= |ULTIMATE.start_l1_insert_~item~3#1.offset| 0) (<= |ULTIMATE.start_l0_insert_#in~list#1.base| 3) (<= |ULTIMATE.start_l1_insert_~list#1.offset| 4) (<= 0 |ULTIMATE.start_l0_insert_#in~list#1.offset|) (= (select (select |#memory_$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|) (<= |ULTIMATE.start_l4_insert_~owner#1.offset| 8) (<= |#NULL.offset| 0) (<= |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_l4_insert_#in~owner#1.offset| 8) (<= |ULTIMATE.start_l0_insert_~list#1.base| 3) (<= 0 |ULTIMATE.start_l3_insert_~item~1#1.offset|) (<= 3 |ULTIMATE.start_l0_insert_#in~list#1.base|) (<= 0 |ULTIMATE.start_l4_insert_~list#1.offset|) (<= 4 |ULTIMATE.start_l1_insert_~list#1.offset|) (<= 0 |ULTIMATE.start_l0_insert_~item~4#1.offset|) (<= |ULTIMATE.start_l2_insert_~owner#1.offset| 4) (<= |#NULL.base| 0) (<= 3 |ULTIMATE.start_l0_insert_~list#1.base|) (<= |ULTIMATE.start_l1_insert_#in~list#1.offset| 4) (<= |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|) (<= 8 |ULTIMATE.start_l4_insert_#in~owner#1.offset|) (<= 3 |~#list~0.base|) (<= 0 |#NULL.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|) (<= |~#list~0.offset| 0))' at error location [2022-12-14 09:11:00,757 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 09:11:00,757 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-12-14 09:11:00,757 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2022-12-14 09:11:00,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478202355] [2022-12-14 09:11:00,757 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-12-14 09:11:00,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-12-14 09:11:00,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:11:00,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-12-14 09:11:00,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=321, Invalid=4932, Unknown=7, NotChecked=142, Total=5402 [2022-12-14 09:11:00,760 INFO L87 Difference]: Start difference. First operand 277 states and 318 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 09:11:02,810 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 09:11:04,826 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-14 09:11:07,592 WARN L539 Checker$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 09:11:11,931 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-14 09:11:14,128 WARN L539 Checker$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 09:11:16,359 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-14 09:11:18,555 WARN L539 Checker$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 09:11:20,750 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-14 09:11:24,958 WARN L539 Checker$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 09:11:29,192 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-14 09:11:33,314 WARN L539 Checker$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 09:11:35,383 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-14 09:11:37,691 WARN L539 Checker$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 09:11:41,836 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-14 09:11:43,859 WARN L539 Checker$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 09:11:46,171 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-14 09:11:48,329 WARN L539 Checker$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 09:11:50,397 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-14 09:11:52,603 WARN L539 Checker$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 09:11:56,730 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-14 09:11:58,318 WARN L539 Checker$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 09:12:00,551 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-14 09:12:02,684 WARN L539 Checker$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 09:12:04,759 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2022-12-14 09:12:16,769 WARN L539 Checker$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 09:12:24,931 WARN L233 SmtUtils]: Spent 6.70s on a formula simplification. DAG size of input: 75 DAG size of output: 47 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 09:12:45,450 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 09:12:45,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:12:45,573 INFO L93 Difference]: Finished difference Result 326 states and 378 transitions. [2022-12-14 09:12:45,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-12-14 09:12:45,573 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 123 [2022-12-14 09:12:45,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:12:45,574 INFO L225 Difference]: With dead ends: 326 [2022-12-14 09:12:45,574 INFO L226 Difference]: Without dead ends: 326 [2022-12-14 09:12:45,575 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 179 SyntacticMatches, 8 SemanticMatches, 97 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 2283 ImplicationChecksByTransitivity, 113.7s TimeCoverageRelationStatistics Valid=574, Invalid=8921, Unknown=15, NotChecked=192, Total=9702 [2022-12-14 09:12:45,575 INFO L413 NwaCegarLoop]: 95 mSDtfsCounter, 384 mSDsluCounter, 2428 mSDsCounter, 0 mSdLazyCounter, 4265 mSolverCounterSat, 45 mSolverCounterUnsat, 25 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 60.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 384 SdHoareTripleChecker+Valid, 2523 SdHoareTripleChecker+Invalid, 4534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 4265 IncrementalHoareTripleChecker+Invalid, 25 IncrementalHoareTripleChecker+Unknown, 199 IncrementalHoareTripleChecker+Unchecked, 60.7s IncrementalHoareTripleChecker+Time [2022-12-14 09:12:45,575 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [384 Valid, 2523 Invalid, 4534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 4265 Invalid, 25 Unknown, 199 Unchecked, 60.7s Time] [2022-12-14 09:12:45,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2022-12-14 09:12:45,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 273. [2022-12-14 09:12:45,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 195 states have (on average 1.4666666666666666) internal successors, (286), 254 states have internal predecessors, (286), 12 states have call successors, (12), 6 states have call predecessors, (12), 6 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-12-14 09:12:45,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 310 transitions. [2022-12-14 09:12:45,580 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 310 transitions. Word has length 123 [2022-12-14 09:12:45,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:12:45,580 INFO L495 AbstractCegarLoop]: Abstraction has 273 states and 310 transitions. [2022-12-14 09:12:45,580 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 09:12:45,580 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 310 transitions. [2022-12-14 09:12:45,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-12-14 09:12:45,581 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:12:45,581 INFO L195 NwaCegarLoop]: trace histogram [66, 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 09:12:45,628 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7891013-185b-4c2a-a6ad-7898d83d81cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-12-14 09:12:45,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7891013-185b-4c2a-a6ad-7898d83d81cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-14 09:12:45,783 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2022-12-14 09:12:45,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:12:45,784 INFO L85 PathProgramCache]: Analyzing trace with hash -1527044719, now seen corresponding path program 1 times [2022-12-14 09:12:45,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:12:45,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976160064] [2022-12-14 09:12:45,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:12:45,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:12:45,869 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 09:12:45,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [370391680] [2022-12-14 09:12:45,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:12:45,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:12:45,870 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7891013-185b-4c2a-a6ad-7898d83d81cd/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:12:45,870 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7891013-185b-4c2a-a6ad-7898d83d81cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:12:45,871 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7891013-185b-4c2a-a6ad-7898d83d81cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-12-14 09:12:46,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:12:46,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 1709 conjuncts, 57 conjunts are in the unsatisfiable core [2022-12-14 09:12:46,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:12:46,522 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 09:12:46,522 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 09:12:46,562 WARN L859 $PredicateComparison]: unable to prove that (exists ((|zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| Int) (v_ArrVal_8873 Int)) (and (= |c_#valid| (store |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_8873)) (= (select |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|) 0))) is different from true [2022-12-14 09:12:46,637 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 09:12:46,637 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 09:12:46,659 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_8874 Int)) (= |c_#valid| (store |c_old(#valid)| |c_zalloc_or_die_calloc_model_~ptr~0#1.base| v_ArrVal_8874))) is different from true [2022-12-14 09:12:46,683 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_8874 Int)) (= |c_#valid| (store |c_old(#valid)| |c_zalloc_or_die_#res#1.base| v_ArrVal_8874))) is different from true [2022-12-14 09:12:46,704 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-12-14 09:12:46,704 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 30 [2022-12-14 09:12:46,783 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_8875 Int)) (= (store |c_old(#valid)| |c_zalloc_or_die_#Ultimate.C_memset_#ptr#1.base| v_ArrVal_8875) |c_#valid|)) is different from true [2022-12-14 09:12:46,893 INFO L321 Elim1Store]: treesize reduction 20, result has 57.4 percent of original size [2022-12-14 09:12:46,894 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 3 case distinctions, treesize of input 31 treesize of output 52 [2022-12-14 09:12:47,093 INFO L134 CoverageAnalysis]: Checked inductivity of 2616 backedges. 478 proven. 514 refuted. 0 times theorem prover too weak. 418 trivial. 1206 not checked. [2022-12-14 09:12:47,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:12:47,163 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:12:47,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976160064] [2022-12-14 09:12:47,163 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 09:12:47,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370391680] [2022-12-14 09:12:47,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370391680] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:12:47,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [358331942] [2022-12-14 09:12:47,166 INFO L159 IcfgInterpreter]: Started Sifa with 38 locations of interest [2022-12-14 09:12:47,166 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:12:47,166 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:12:47,166 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:12:47,166 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:12:47,186 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 09:12:47,191 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 09:12:47,205 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 09:12:47,211 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 09:12:47,217 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 09:12:47,259 INFO L321 Elim1Store]: treesize reduction 15, result has 42.3 percent of original size [2022-12-14 09:12:47,259 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 184 treesize of output 187 [2022-12-14 09:12:47,279 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-12-14 09:12:47,280 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 09:12:47,298 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-12-14 09:12:47,299 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 09:12:47,395 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 09:12:47,400 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 09:12:47,404 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 09:12:47,421 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 09:12:47,424 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 09:12:47,442 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 09:12:47,448 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 09:12:48,148 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 09:12:48,168 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 09:12:48,176 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 09:12:48,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:12:48,247 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 09:12:48,266 INFO L321 Elim1Store]: treesize reduction 43, result has 17.3 percent of original size [2022-12-14 09:12:48,266 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 09:12:48,276 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 09:12:48,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:12:48,350 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-12-14 09:12:48,350 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 09:12:48,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:12:48,377 INFO L321 Elim1Store]: treesize reduction 25, result has 47.9 percent of original size [2022-12-14 09:12:48,377 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 46 [2022-12-14 09:12:48,397 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 09:12:48,480 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 09:12:48,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:12:48,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:12:48,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:12:48,497 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:12:48,502 INFO L321 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2022-12-14 09:12:48,502 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 57 treesize of output 65 [2022-12-14 09:12:48,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:12:48,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:12:48,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:12:48,518 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:12:48,527 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-12-14 09:12:48,528 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 103 treesize of output 78 [2022-12-14 09:12:48,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:12:48,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:12:48,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:12:48,619 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:12:48,669 INFO L321 Elim1Store]: treesize reduction 32, result has 54.9 percent of original size [2022-12-14 09:12:48,669 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 110 treesize of output 105 [2022-12-14 09:12:48,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:12:48,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:12:48,710 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:12:48,757 INFO L321 Elim1Store]: treesize reduction 50, result has 53.3 percent of original size [2022-12-14 09:12:48,758 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 64 treesize of output 104 [2022-12-14 09:12:48,803 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 09:12:48,821 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2022-12-14 09:12:48,831 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2022-12-14 09:12:48,902 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 13 treesize of output 9 [2022-12-14 09:12:48,916 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 09:12:48,926 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 09:12:48,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:12:48,973 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:12:48,978 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-14 09:12:48,978 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 09:12:48,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:12:48,997 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:12:49,002 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-14 09:12:49,002 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 09:12:49,021 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 09:12:49,068 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:12:49,084 INFO L321 Elim1Store]: treesize reduction 14, result has 61.1 percent of original size [2022-12-14 09:12:49,084 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 09:12:49,098 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:12:49,120 INFO L321 Elim1Store]: treesize reduction 18, result has 50.0 percent of original size [2022-12-14 09:12:49,120 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 09:12:49,136 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 09:12:49,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:12:49,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:12:49,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:12:49,201 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:12:49,206 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-14 09:12:49,207 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 09:12:49,223 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 09:12:49,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:12:49,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:12:49,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:12:49,247 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:12:49,253 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-14 09:12:49,253 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 42 treesize of output 47 [2022-12-14 09:12:49,295 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2022-12-14 09:12:49,386 INFO L197 IcfgInterpreter]: Interpreting procedure zalloc_or_die with input of size 81 for LOIs [2022-12-14 09:12:49,409 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 09:12:49,421 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 09:12:49,490 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 09:12:49,502 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 09:12:49,539 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 09:12:49,566 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 16 treesize of output 12 [2022-12-14 09:12:49,573 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 09:12:49,583 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 09:12:49,593 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:13:02,766 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '16362#(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$.offset| |ULTIMATE.start_l3_insert_~item~1#1.base|) (+ |ULTIMATE.start_l3_insert_~item~1#1.offset| 8)))) (<= (+ |ULTIMATE.start_l3_insert_~list#1.offset| 4) (select |#length| |ULTIMATE.start_l3_insert_~list#1.base|)) (<= |~#list~0.base| 3) (<= 8 |ULTIMATE.start_l3_insert_#in~list#1.offset|) (<= 8 |ULTIMATE.start_l4_insert_~owner#1.offset|) (<= |ULTIMATE.start_l4_insert_~item~0#1.offset| 0) (<= 0 |#NULL.base|) (<= 0 |ULTIMATE.start_l2_insert_#in~list#1.offset|) (<= |ULTIMATE.start_l3_insert_~list#1.offset| 8) (<= 0 |ULTIMATE.start_l2_insert_~list#1.offset|) (<= |ULTIMATE.start_l2_insert_~item~2#1.offset| 0) (<= 4 |ULTIMATE.start_l2_insert_~owner#1.offset|) (<= |ULTIMATE.start_l0_insert_#in~list#1.offset| 0) (<= 4 |ULTIMATE.start_l1_insert_#in~list#1.offset|) (<= 0 |ULTIMATE.start_l2_insert_~item~2#1.offset|) (<= (+ |ULTIMATE.start_l2_insert_~item~2#1.offset| 4) (select |#length| |ULTIMATE.start_l2_insert_~item~2#1.base|)) (<= |ULTIMATE.start_l2_insert_#in~owner#1.offset| 4) (<= |ULTIMATE.start_l2_insert_#in~list#1.offset| 0) (<= 0 |ULTIMATE.start_l0_insert_~list#1.offset|) (<= |ULTIMATE.start_l2_insert_~list#1.offset| 0) (<= 4 |ULTIMATE.start_l2_insert_#in~owner#1.offset|) (= |ULTIMATE.start_l3_insert_~item~1#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_l3_insert_~list#1.base|) |ULTIMATE.start_l3_insert_~list#1.offset|)) (<= |ULTIMATE.start_l1_insert_~item~3#1.offset| 0) (<= |ULTIMATE.start_l0_insert_#in~list#1.base| 3) (<= |ULTIMATE.start_l1_insert_~list#1.offset| 4) (<= 0 |ULTIMATE.start_l0_insert_#in~list#1.offset|) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_l3_insert_~item~1#1.base|) (+ |ULTIMATE.start_l3_insert_~item~1#1.offset| 8)) |ULTIMATE.start_l3_insert_~list#1.base|) (<= |ULTIMATE.start_l4_insert_~owner#1.offset| 8) (= (select |#valid| |ULTIMATE.start_l3_insert_~list#1.base|) 1) (or (not (= |ULTIMATE.start_l3_insert_~list#1.base| |ULTIMATE.start_l3_insert_~item~1#1.base|)) (= |ULTIMATE.start_l3_insert_~list#1.base| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_l3_insert_~item~1#1.base|) (+ |ULTIMATE.start_l3_insert_~item~1#1.offset| 4)))) (<= |#NULL.offset| 0) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_l2_insert_~item~2#1.base|) |ULTIMATE.start_l2_insert_~item~2#1.offset|) |ULTIMATE.start_l2_insert_~owner#1.offset|) (or (not (= |ULTIMATE.start_l3_insert_~list#1.base| |ULTIMATE.start_l3_insert_~item~1#1.base|)) (= |ULTIMATE.start_l3_insert_~list#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_l3_insert_~item~1#1.base|) (+ |ULTIMATE.start_l3_insert_~item~1#1.offset| 4)))) (<= |ULTIMATE.start_l0_insert_~list#1.offset| 0) (<= |ULTIMATE.start_l4_insert_~list#1.offset| 0) (not (= (select |#valid| |ULTIMATE.start_l2_insert_~list#1.base|) 1)) (<= |ULTIMATE.start_l3_insert_#in~list#1.offset| 8) (<= |ULTIMATE.start_l4_insert_#in~owner#1.offset| 8) (<= |ULTIMATE.start_l0_insert_~list#1.base| 3) (<= 0 |ULTIMATE.start_l3_insert_~item~1#1.offset|) (<= 3 |ULTIMATE.start_l0_insert_#in~list#1.base|) (<= 0 |ULTIMATE.start_l4_insert_~list#1.offset|) (<= 4 |ULTIMATE.start_l1_insert_~list#1.offset|) (<= 0 |ULTIMATE.start_l0_insert_~item~4#1.offset|) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_l3_insert_~list#1.base|) |ULTIMATE.start_l3_insert_~list#1.offset|) |ULTIMATE.start_l3_insert_~item~1#1.base|) (<= |ULTIMATE.start_l2_insert_~owner#1.offset| 4) (<= |#NULL.base| 0) (<= 3 |ULTIMATE.start_l0_insert_~list#1.base|) (<= |ULTIMATE.start_l1_insert_#in~list#1.offset| 4) (<= |ULTIMATE.start_l3_insert_~item~1#1.offset| 0) (<= 8 |ULTIMATE.start_l3_insert_~list#1.offset|) (= (select |#valid| |ULTIMATE.start_l2_insert_~item~2#1.base|) 1) (<= |ULTIMATE.start_l0_insert_~item~4#1.offset| 0) (<= 0 |ULTIMATE.start_l1_insert_~item~3#1.offset|) (<= |ULTIMATE.start_l4_insert_#in~list#1.offset| 0) (= (select |#valid| |ULTIMATE.start_l3_insert_~item~1#1.base|) 1) (<= 0 |~#list~0.offset|) (<= 8 |ULTIMATE.start_l4_insert_#in~owner#1.offset|) (<= 3 |~#list~0.base|) (<= 0 |#NULL.offset|) (<= 0 |ULTIMATE.start_l4_insert_#in~list#1.offset|) (= |ULTIMATE.start_l2_insert_~owner#1.base| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_l2_insert_~item~2#1.base|) |ULTIMATE.start_l2_insert_~item~2#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|) (<= |~#list~0.offset| 0))' at error location [2022-12-14 09:13:02,766 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 09:13:02,767 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-12-14 09:13:02,767 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2022-12-14 09:13:02,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405135352] [2022-12-14 09:13:02,767 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-12-14 09:13:02,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-14 09:13:02,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:13:02,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-14 09:13:02,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=274, Invalid=2468, Unknown=30, NotChecked=420, Total=3192 [2022-12-14 09:13:02,768 INFO L87 Difference]: Start difference. First operand 273 states and 310 transitions. Second operand has 19 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 16 states have internal predecessors, (56), 4 states have call successors, (6), 2 states have call predecessors, (6), 6 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2022-12-14 09:13:03,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:13:03,944 INFO L93 Difference]: Finished difference Result 296 states and 331 transitions. [2022-12-14 09:13:03,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 09:13:03,944 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 16 states have internal predecessors, (56), 4 states have call successors, (6), 2 states have call predecessors, (6), 6 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) Word has length 128 [2022-12-14 09:13:03,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:13:03,945 INFO L225 Difference]: With dead ends: 296 [2022-12-14 09:13:03,945 INFO L226 Difference]: Without dead ends: 296 [2022-12-14 09:13:03,946 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 210 SyntacticMatches, 10 SemanticMatches, 61 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 830 ImplicationChecksByTransitivity, 13.6s TimeCoverageRelationStatistics Valid=319, Invalid=3089, Unknown=30, NotChecked=468, Total=3906 [2022-12-14 09:13:03,946 INFO L413 NwaCegarLoop]: 103 mSDtfsCounter, 329 mSDsluCounter, 854 mSDsCounter, 0 mSdLazyCounter, 930 mSolverCounterSat, 45 mSolverCounterUnsat, 34 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 329 SdHoareTripleChecker+Valid, 957 SdHoareTripleChecker+Invalid, 1767 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 930 IncrementalHoareTripleChecker+Invalid, 34 IncrementalHoareTripleChecker+Unknown, 758 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-12-14 09:13:03,947 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [329 Valid, 957 Invalid, 1767 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 930 Invalid, 34 Unknown, 758 Unchecked, 0.9s Time] [2022-12-14 09:13:03,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2022-12-14 09:13:03,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 269. [2022-12-14 09:13:03,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 195 states have (on average 1.4256410256410257) internal successors, (278), 250 states have internal predecessors, (278), 12 states have call successors, (12), 6 states have call predecessors, (12), 6 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-12-14 09:13:03,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 302 transitions. [2022-12-14 09:13:03,953 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 302 transitions. Word has length 128 [2022-12-14 09:13:03,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:13:03,953 INFO L495 AbstractCegarLoop]: Abstraction has 269 states and 302 transitions. [2022-12-14 09:13:03,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 16 states have internal predecessors, (56), 4 states have call successors, (6), 2 states have call predecessors, (6), 6 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2022-12-14 09:13:03,953 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 302 transitions. [2022-12-14 09:13:03,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-12-14 09:13:03,954 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:13:03,954 INFO L195 NwaCegarLoop]: trace histogram [66, 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 09:13:03,962 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7891013-185b-4c2a-a6ad-7898d83d81cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-12-14 09:13:04,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7891013-185b-4c2a-a6ad-7898d83d81cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:13:04,156 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr25REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2022-12-14 09:13:04,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:13:04,157 INFO L85 PathProgramCache]: Analyzing trace with hash -1527044718, now seen corresponding path program 1 times [2022-12-14 09:13:04,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:13:04,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523915857] [2022-12-14 09:13:04,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:13:04,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:13:04,233 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-14 09:13:04,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1017791000] [2022-12-14 09:13:04,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:13:04,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:13:04,233 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7891013-185b-4c2a-a6ad-7898d83d81cd/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:13:04,234 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7891013-185b-4c2a-a6ad-7898d83d81cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:13:04,235 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7891013-185b-4c2a-a6ad-7898d83d81cd/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-12-14 09:13:04,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:13:04,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 1709 conjuncts, 134 conjunts are in the unsatisfiable core [2022-12-14 09:13:04,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:13:04,792 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 09:13:16,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:13:16,313 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 09:13:16,427 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 09:13:16,427 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 09:13:17,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:13:17,574 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 09:13:17,598 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-12-14 09:13:17,598 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 09:13:18,432 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_9808 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_9808) |c_#length|) (= (select |c_old(#valid)| |zalloc_or_die_#Ultimate.C_memset_#ptr#1.base|) 0))) is different from true [2022-12-14 09:13:18,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:13:18,536 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 09:13:18,599 INFO L321 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2022-12-14 09:13:18,600 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 25 [2022-12-14 09:13:19,457 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_9809 Int)) (= (store |c_old(#length)| |c_zalloc_or_die_calloc_model_~ptr~0#1.base| v_ArrVal_9809) |c_#length|)) is different from true [2022-12-14 09:13:20,069 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_9809 Int)) (= |c_#length| (store |c_old(#length)| |c_zalloc_or_die_#res#1.base| v_ArrVal_9809))) is different from true [2022-12-14 09:13:20,154 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 09:13:20,155 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 09:13:20,869 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 09:13:21,718 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 37 treesize of output 25 [2022-12-14 09:13:23,204 INFO L134 CoverageAnalysis]: Checked inductivity of 2616 backedges. 32 proven. 885 refuted. 0 times theorem prover too weak. 461 trivial. 1238 not checked. [2022-12-14 09:13:23,204 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:13:25,077 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:13:25,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523915857] [2022-12-14 09:13:25,077 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-14 09:13:25,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017791000] [2022-12-14 09:13:25,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1017791000] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:13:25,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [161401480] [2022-12-14 09:13:25,079 INFO L159 IcfgInterpreter]: Started Sifa with 38 locations of interest [2022-12-14 09:13:25,079 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:13:25,079 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:13:25,080 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:13:25,080 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:13:25,100 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 09:13:25,105 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 09:13:25,146 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 09:13:25,178 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 09:13:25,186 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 09:13:25,264 INFO L321 Elim1Store]: treesize reduction 15, result has 42.3 percent of original size [2022-12-14 09:13:25,264 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 184 treesize of output 187 [2022-12-14 09:13:25,311 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-12-14 09:13:25,312 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 09:13:25,356 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-12-14 09:13:25,357 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 09:13:25,429 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 14 treesize of output 10 [2022-12-14 09:13:25,433 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 09:13:25,438 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 09:13:25,457 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 09:13:25,461 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 09:13:25,482 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 09:13:25,485 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 09:13:26,185 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 09:13:26,194 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 09:13:26,212 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 09:13:26,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:13:26,290 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 09:13:26,313 INFO L321 Elim1Store]: treesize reduction 43, result has 17.3 percent of original size [2022-12-14 09:13:26,314 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 09:13:26,325 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 09:13:26,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:13:26,398 INFO L321 Elim1Store]: treesize reduction 25, result has 47.9 percent of original size [2022-12-14 09:13:26,398 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 46 [2022-12-14 09:13:26,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:13:26,424 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-12-14 09:13:26,425 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 80 treesize of output 59 [2022-12-14 09:13:26,448 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 09:13:26,529 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 09:13:26,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:13:26,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:13:26,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:13:26,564 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:13:26,571 INFO L321 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2022-12-14 09:13:26,571 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 57 treesize of output 65 [2022-12-14 09:13:26,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:13:26,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:13:26,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:13:26,588 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:13:26,594 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-12-14 09:13:26,595 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 103 treesize of output 78 [2022-12-14 09:13:26,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:13:26,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:13:26,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:13:26,665 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:13:26,712 INFO L321 Elim1Store]: treesize reduction 50, result has 53.3 percent of original size [2022-12-14 09:13:26,712 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 64 treesize of output 104 [2022-12-14 09:13:26,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:13:26,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:13:26,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:13:26,736 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:13:26,777 INFO L321 Elim1Store]: treesize reduction 32, result has 54.9 percent of original size [2022-12-14 09:13:26,777 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 143 treesize of output 126 [2022-12-14 09:13:26,830 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 09:13:26,855 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2022-12-14 09:13:26,865 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2022-12-14 09:13:26,920 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 09:13:26,932 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 19 treesize of output 1 [2022-12-14 09:13:26,940 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 09:13:26,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:13:26,986 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:13:26,990 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-14 09:13:26,990 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 09:13:26,998 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 09:13:27,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:13:27,010 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:13:27,015 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-14 09:13:27,015 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 09:13:27,052 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:13:27,072 INFO L321 Elim1Store]: treesize reduction 14, result has 61.1 percent of original size [2022-12-14 09:13:27,073 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 09:13:27,095 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:13:27,113 INFO L321 Elim1Store]: treesize reduction 18, result has 50.0 percent of original size [2022-12-14 09:13:27,113 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 09:13:27,128 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 09:13:27,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:13:27,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:13:27,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:13:27,193 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:13:27,198 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-14 09:13:27,198 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 09:13:27,214 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 09:13:27,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:13:27,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:13:27,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:13:27,232 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:13:27,236 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-14 09:13:27,237 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 42 treesize of output 47 [2022-12-14 09:13:27,261 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2022-12-14 09:13:27,347 INFO L197 IcfgInterpreter]: Interpreting procedure zalloc_or_die with input of size 81 for LOIs [2022-12-14 09:13:27,366 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 09:13:27,383 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 09:13:27,451 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 09:13:27,490 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 09:13:27,521 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 09:13:27,566 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 16 treesize of output 12 [2022-12-14 09:13:27,573 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 09:13:27,579 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 09:13:27,588 INFO L180 IcfgInterpreter]: Interpretation finished