./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/ldv-memsafety/ArraysWithLenghtAtDeclaration_-read.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b5237d83 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_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/ArraysWithLenghtAtDeclaration_-read.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba --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 9aaf3ef5b6218ff6658a67703b1e3ffb0d16a40e5e7c9a13354b853d6f63747b --- 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-b5237d8 [2022-11-22 01:09:17,020 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-22 01:09:17,023 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-22 01:09:17,072 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-22 01:09:17,076 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-22 01:09:17,081 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-22 01:09:17,082 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-22 01:09:17,086 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-22 01:09:17,089 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-22 01:09:17,092 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-22 01:09:17,094 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-22 01:09:17,098 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-22 01:09:17,099 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-22 01:09:17,105 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-22 01:09:17,107 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-22 01:09:17,109 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-22 01:09:17,111 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-22 01:09:17,114 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-22 01:09:17,116 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-22 01:09:17,120 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-22 01:09:17,125 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-22 01:09:17,127 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-22 01:09:17,129 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-22 01:09:17,131 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-22 01:09:17,140 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-22 01:09:17,140 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-22 01:09:17,140 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-22 01:09:17,142 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-22 01:09:17,143 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-22 01:09:17,144 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-22 01:09:17,145 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-22 01:09:17,145 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-22 01:09:17,148 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-22 01:09:17,150 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-22 01:09:17,151 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-22 01:09:17,151 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-22 01:09:17,152 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-22 01:09:17,152 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-22 01:09:17,153 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-22 01:09:17,154 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-22 01:09:17,154 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-22 01:09:17,155 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-11-22 01:09:17,205 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-22 01:09:17,205 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-22 01:09:17,206 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-22 01:09:17,206 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-22 01:09:17,207 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-22 01:09:17,208 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-22 01:09:17,208 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-22 01:09:17,208 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-22 01:09:17,209 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-22 01:09:17,209 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-22 01:09:17,210 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-22 01:09:17,211 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-22 01:09:17,211 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-22 01:09:17,211 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-22 01:09:17,211 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-22 01:09:17,212 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-22 01:09:17,212 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-22 01:09:17,212 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-22 01:09:17,214 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-22 01:09:17,214 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-22 01:09:17,214 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-22 01:09:17,215 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-22 01:09:17,215 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-22 01:09:17,215 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-22 01:09:17,216 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-22 01:09:17,216 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-22 01:09:17,216 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-22 01:09:17,217 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-22 01:09:17,217 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-22 01:09:17,218 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-22 01:09:17,218 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-22 01:09:17,218 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-22 01:09:17,218 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-22 01:09:17,219 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-22 01:09:17,219 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-22 01:09:17,219 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 01:09:17,220 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-22 01:09:17,220 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-22 01:09:17,220 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-22 01:09:17,221 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-22 01:09:17,221 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-22 01:09:17,221 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-22 01:09:17,221 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_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9aaf3ef5b6218ff6658a67703b1e3ffb0d16a40e5e7c9a13354b853d6f63747b [2022-11-22 01:09:17,571 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-22 01:09:17,594 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-22 01:09:17,597 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-22 01:09:17,598 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-22 01:09:17,599 INFO L275 PluginConnector]: CDTParser initialized [2022-11-22 01:09:17,601 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/../../sv-benchmarks/c/ldv-memsafety/ArraysWithLenghtAtDeclaration_-read.c [2022-11-22 01:09:20,825 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-22 01:09:21,099 INFO L351 CDTParser]: Found 1 translation units. [2022-11-22 01:09:21,100 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/sv-benchmarks/c/ldv-memsafety/ArraysWithLenghtAtDeclaration_-read.c [2022-11-22 01:09:21,107 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/data/94ae2742e/6863ac34b8974ac99e14b2c89b95c0de/FLAG4092e3467 [2022-11-22 01:09:21,125 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/data/94ae2742e/6863ac34b8974ac99e14b2c89b95c0de [2022-11-22 01:09:21,128 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-22 01:09:21,129 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-22 01:09:21,131 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-22 01:09:21,131 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-22 01:09:21,135 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-22 01:09:21,136 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:09:21" (1/1) ... [2022-11-22 01:09:21,138 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3add5369 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:09:21, skipping insertion in model container [2022-11-22 01:09:21,138 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:09:21" (1/1) ... [2022-11-22 01:09:21,147 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-22 01:09:21,166 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-22 01:09:21,380 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 01:09:21,392 INFO L203 MainTranslator]: Completed pre-run [2022-11-22 01:09:21,412 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 01:09:21,429 INFO L208 MainTranslator]: Completed translation [2022-11-22 01:09:21,430 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:09:21 WrapperNode [2022-11-22 01:09:21,430 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-22 01:09:21,432 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-22 01:09:21,432 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-22 01:09:21,432 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-22 01:09:21,441 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:09:21" (1/1) ... [2022-11-22 01:09:21,453 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:09:21" (1/1) ... [2022-11-22 01:09:21,481 INFO L138 Inliner]: procedures = 8, calls = 14, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 67 [2022-11-22 01:09:21,483 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-22 01:09:21,484 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-22 01:09:21,484 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-22 01:09:21,484 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-22 01:09:21,494 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:09:21" (1/1) ... [2022-11-22 01:09:21,495 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:09:21" (1/1) ... [2022-11-22 01:09:21,507 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:09:21" (1/1) ... [2022-11-22 01:09:21,508 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:09:21" (1/1) ... [2022-11-22 01:09:21,518 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:09:21" (1/1) ... [2022-11-22 01:09:21,525 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:09:21" (1/1) ... [2022-11-22 01:09:21,532 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:09:21" (1/1) ... [2022-11-22 01:09:21,534 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:09:21" (1/1) ... [2022-11-22 01:09:21,536 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-22 01:09:21,539 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-22 01:09:21,540 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-22 01:09:21,540 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-22 01:09:21,541 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:09:21" (1/1) ... [2022-11-22 01:09:21,550 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 01:09:21,564 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:09:21,587 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-22 01:09:21,623 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-22 01:09:21,651 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-22 01:09:21,651 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-22 01:09:21,651 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-22 01:09:21,652 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-22 01:09:21,652 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-22 01:09:21,652 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-22 01:09:21,744 INFO L235 CfgBuilder]: Building ICFG [2022-11-22 01:09:21,747 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-22 01:09:21,990 INFO L276 CfgBuilder]: Performing block encoding [2022-11-22 01:09:22,096 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-22 01:09:22,096 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-22 01:09:22,099 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:09:22 BoogieIcfgContainer [2022-11-22 01:09:22,099 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-22 01:09:22,102 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-22 01:09:22,102 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-22 01:09:22,106 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-22 01:09:22,106 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 01:09:21" (1/3) ... [2022-11-22 01:09:22,107 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ab67575 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:09:22, skipping insertion in model container [2022-11-22 01:09:22,107 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:09:21" (2/3) ... [2022-11-22 01:09:22,107 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ab67575 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:09:22, skipping insertion in model container [2022-11-22 01:09:22,114 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:09:22" (3/3) ... [2022-11-22 01:09:22,115 INFO L112 eAbstractionObserver]: Analyzing ICFG ArraysWithLenghtAtDeclaration_-read.c [2022-11-22 01:09:22,155 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-22 01:09:22,155 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2022-11-22 01:09:22,205 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-22 01:09:22,213 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;@1f58a79, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-22 01:09:22,213 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2022-11-22 01:09:22,218 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 10 states have (on average 2.2) internal successors, (22), 18 states have internal predecessors, (22), 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) [2022-11-22 01:09:22,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-22 01:09:22,226 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:09:22,227 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-22 01:09:22,227 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-22 01:09:22,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:09:22,234 INFO L85 PathProgramCache]: Analyzing trace with hash 3271901, now seen corresponding path program 1 times [2022-11-22 01:09:22,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:09:22,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218614037] [2022-11-22 01:09:22,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:09:22,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:09:22,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:09:22,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:09:22,648 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:09:22,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218614037] [2022-11-22 01:09:22,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218614037] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:09:22,649 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:09:22,650 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-22 01:09:22,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498100267] [2022-11-22 01:09:22,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:09:22,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:09:22,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:09:22,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:09:22,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:09:22,710 INFO L87 Difference]: Start difference. First operand has 19 states, 10 states have (on average 2.2) internal successors, (22), 18 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 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) [2022-11-22 01:09:22,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:09:22,827 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2022-11-22 01:09:22,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:09:22,830 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 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 4 [2022-11-22 01:09:22,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:09:22,839 INFO L225 Difference]: With dead ends: 37 [2022-11-22 01:09:22,840 INFO L226 Difference]: Without dead ends: 35 [2022-11-22 01:09:22,842 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:09:22,850 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 17 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:09:22,851 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 16 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 01:09:22,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-11-22 01:09:22,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 20. [2022-11-22 01:09:22,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 19 states have internal predecessors, (23), 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) [2022-11-22 01:09:22,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2022-11-22 01:09:22,889 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 4 [2022-11-22 01:09:22,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:09:22,889 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2022-11-22 01:09:22,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 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) [2022-11-22 01:09:22,890 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2022-11-22 01:09:22,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-22 01:09:22,891 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:09:22,891 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-22 01:09:22,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-22 01:09:22,893 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-22 01:09:22,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:09:22,894 INFO L85 PathProgramCache]: Analyzing trace with hash 3197824, now seen corresponding path program 1 times [2022-11-22 01:09:22,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:09:22,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209956439] [2022-11-22 01:09:22,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:09:22,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:09:22,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:09:23,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:09:23,011 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:09:23,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209956439] [2022-11-22 01:09:23,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209956439] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:09:23,012 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:09:23,012 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-22 01:09:23,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929631332] [2022-11-22 01:09:23,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:09:23,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:09:23,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:09:23,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:09:23,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:09:23,017 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 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) [2022-11-22 01:09:23,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:09:23,080 INFO L93 Difference]: Finished difference Result 37 states and 43 transitions. [2022-11-22 01:09:23,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:09:23,081 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), 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 4 [2022-11-22 01:09:23,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:09:23,085 INFO L225 Difference]: With dead ends: 37 [2022-11-22 01:09:23,086 INFO L226 Difference]: Without dead ends: 37 [2022-11-22 01:09:23,093 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:09:23,095 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 16 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 01:09:23,096 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 19 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 01:09:23,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-11-22 01:09:23,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 22. [2022-11-22 01:09:23,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 21 states have internal predecessors, (26), 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) [2022-11-22 01:09:23,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2022-11-22 01:09:23,105 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 4 [2022-11-22 01:09:23,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:09:23,106 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2022-11-22 01:09:23,106 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), 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) [2022-11-22 01:09:23,106 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2022-11-22 01:09:23,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-22 01:09:23,107 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:09:23,107 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-22 01:09:23,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-22 01:09:23,107 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-22 01:09:23,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:09:23,108 INFO L85 PathProgramCache]: Analyzing trace with hash 3199854, now seen corresponding path program 1 times [2022-11-22 01:09:23,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:09:23,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613923461] [2022-11-22 01:09:23,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:09:23,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:09:23,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:09:23,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:09:23,198 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:09:23,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613923461] [2022-11-22 01:09:23,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613923461] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:09:23,198 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:09:23,199 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 01:09:23,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146683450] [2022-11-22 01:09:23,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:09:23,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 01:09:23,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:09:23,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 01:09:23,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 01:09:23,201 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 4 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 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) [2022-11-22 01:09:23,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:09:23,275 INFO L93 Difference]: Finished difference Result 42 states and 47 transitions. [2022-11-22 01:09:23,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 01:09:23,276 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 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 4 [2022-11-22 01:09:23,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:09:23,277 INFO L225 Difference]: With dead ends: 42 [2022-11-22 01:09:23,277 INFO L226 Difference]: Without dead ends: 42 [2022-11-22 01:09:23,278 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-22 01:09:23,279 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 25 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:09:23,279 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 17 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 01:09:23,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-11-22 01:09:23,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 23. [2022-11-22 01:09:23,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 15 states have (on average 1.8) internal successors, (27), 22 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:09:23,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2022-11-22 01:09:23,299 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 4 [2022-11-22 01:09:23,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:09:23,300 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2022-11-22 01:09:23,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 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) [2022-11-22 01:09:23,300 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2022-11-22 01:09:23,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-22 01:09:23,300 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:09:23,301 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-22 01:09:23,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-22 01:09:23,301 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-22 01:09:23,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:09:23,302 INFO L85 PathProgramCache]: Analyzing trace with hash 99132597, now seen corresponding path program 1 times [2022-11-22 01:09:23,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:09:23,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90336291] [2022-11-22 01:09:23,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:09:23,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:09:23,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:09:23,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:09:23,422 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:09:23,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90336291] [2022-11-22 01:09:23,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90336291] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:09:23,422 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:09:23,423 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-22 01:09:23,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241088863] [2022-11-22 01:09:23,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:09:23,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 01:09:23,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:09:23,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 01:09:23,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 01:09:23,425 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:09:23,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:09:23,464 INFO L93 Difference]: Finished difference Result 22 states and 26 transitions. [2022-11-22 01:09:23,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 01:09:23,465 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-22 01:09:23,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:09:23,465 INFO L225 Difference]: With dead ends: 22 [2022-11-22 01:09:23,465 INFO L226 Difference]: Without dead ends: 22 [2022-11-22 01:09:23,466 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-22 01:09:23,467 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 29 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 01:09:23,468 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 7 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 01:09:23,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-11-22 01:09:23,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-11-22 01:09:23,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 21 states have internal predecessors, (26), 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) [2022-11-22 01:09:23,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2022-11-22 01:09:23,471 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 5 [2022-11-22 01:09:23,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:09:23,472 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2022-11-22 01:09:23,472 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), 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) [2022-11-22 01:09:23,472 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2022-11-22 01:09:23,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-22 01:09:23,473 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:09:23,473 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-22 01:09:23,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-22 01:09:23,473 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-22 01:09:23,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:09:23,474 INFO L85 PathProgramCache]: Analyzing trace with hash 99132598, now seen corresponding path program 1 times [2022-11-22 01:09:23,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:09:23,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255749391] [2022-11-22 01:09:23,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:09:23,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:09:23,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:09:23,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:09:23,591 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:09:23,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255749391] [2022-11-22 01:09:23,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255749391] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:09:23,592 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:09:23,592 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-22 01:09:23,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23617979] [2022-11-22 01:09:23,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:09:23,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 01:09:23,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:09:23,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 01:09:23,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 01:09:23,594 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:09:23,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:09:23,672 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2022-11-22 01:09:23,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 01:09:23,672 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-22 01:09:23,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:09:23,673 INFO L225 Difference]: With dead ends: 35 [2022-11-22 01:09:23,673 INFO L226 Difference]: Without dead ends: 35 [2022-11-22 01:09:23,674 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-22 01:09:23,675 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 32 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:09:23,675 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 15 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 01:09:23,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-11-22 01:09:23,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 23. [2022-11-22 01:09:23,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 16 states have (on average 1.6875) internal successors, (27), 22 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:09:23,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2022-11-22 01:09:23,680 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 5 [2022-11-22 01:09:23,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:09:23,680 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2022-11-22 01:09:23,680 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), 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) [2022-11-22 01:09:23,680 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2022-11-22 01:09:23,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-22 01:09:23,681 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:09:23,681 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2022-11-22 01:09:23,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-22 01:09:23,682 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-22 01:09:23,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:09:23,683 INFO L85 PathProgramCache]: Analyzing trace with hash 777193832, now seen corresponding path program 1 times [2022-11-22 01:09:23,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:09:23,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763662072] [2022-11-22 01:09:23,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:09:23,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:09:23,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:09:23,766 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:09:23,766 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:09:23,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763662072] [2022-11-22 01:09:23,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763662072] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:09:23,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920362316] [2022-11-22 01:09:23,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:09:23,767 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:09:23,768 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:09:23,775 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:09:23,800 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-22 01:09:23,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:09:23,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-22 01:09:23,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:09:23,894 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:09:23,894 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:09:23,929 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:09:23,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920362316] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:09:23,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [363140064] [2022-11-22 01:09:23,951 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2022-11-22 01:09:23,951 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:09:23,956 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:09:23,962 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:09:23,963 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:09:24,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:09:24,035 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-11-22 01:09:24,100 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 15 treesize of output 14 [2022-11-22 01:09:24,366 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 235 treesize of output 237 [2022-11-22 01:09:24,512 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 15 treesize of output 14 [2022-11-22 01:09:24,538 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:09:24,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [363140064] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:09:24,764 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:09:24,764 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3, 3] total 9 [2022-11-22 01:09:24,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805128388] [2022-11-22 01:09:24,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:09:24,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 01:09:24,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:09:24,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 01:09:24,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-11-22 01:09:24,766 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:09:25,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:09:25,185 INFO L93 Difference]: Finished difference Result 30 states and 35 transitions. [2022-11-22 01:09:25,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 01:09:25,186 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-22 01:09:25,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:09:25,186 INFO L225 Difference]: With dead ends: 30 [2022-11-22 01:09:25,187 INFO L226 Difference]: Without dead ends: 30 [2022-11-22 01:09:25,187 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-11-22 01:09:25,188 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 13 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:09:25,188 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 12 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 01:09:25,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-11-22 01:09:25,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2022-11-22 01:09:25,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 28 states have internal predecessors, (35), 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) [2022-11-22 01:09:25,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2022-11-22 01:09:25,192 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 7 [2022-11-22 01:09:25,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:09:25,192 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2022-11-22 01:09:25,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:09:25,193 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2022-11-22 01:09:25,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-22 01:09:25,193 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:09:25,193 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1] [2022-11-22 01:09:25,205 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-22 01:09:25,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:09:25,399 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-22 01:09:25,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:09:25,400 INFO L85 PathProgramCache]: Analyzing trace with hash -1676794930, now seen corresponding path program 1 times [2022-11-22 01:09:25,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:09:25,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232590064] [2022-11-22 01:09:25,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:09:25,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:09:25,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:09:25,563 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:09:25,563 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:09:25,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232590064] [2022-11-22 01:09:25,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232590064] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:09:25,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806916071] [2022-11-22 01:09:25,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:09:25,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:09:25,564 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:09:25,565 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:09:25,588 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-22 01:09:25,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:09:25,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-22 01:09:25,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:09:25,655 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-22 01:09:25,656 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-11-22 01:09:25,746 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:09:25,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:09:25,833 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:09:25,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806916071] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:09:25,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1749859908] [2022-11-22 01:09:25,836 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2022-11-22 01:09:25,836 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:09:25,837 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:09:25,837 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:09:25,837 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:09:25,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:09:25,856 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-11-22 01:09:25,920 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 15 treesize of output 14 [2022-11-22 01:09:26,094 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 235 treesize of output 237 [2022-11-22 01:09:26,197 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 15 treesize of output 14 [2022-11-22 01:09:26,221 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:09:26,622 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '491#(and (<= |ULTIMATE.start_foo_#in~b#1.offset| 0) (not (<= (+ |ULTIMATE.start_foo_~i~0#1| |ULTIMATE.start_foo_~b#1.offset| 1) (select |#length| |ULTIMATE.start_foo_~b#1.base|))) (= |ULTIMATE.start_main_~#mask~0#1.offset| 0) (<= |ULTIMATE.start_foo_#in~size#1| 0) (<= 0 |ULTIMATE.start_foo_~b#1.offset|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start_main_~i~1#1| 0) (<= 0 |ULTIMATE.start_foo_#in~b#1.base|) (<= 0 |ULTIMATE.start_foo_~b#1.base|) (<= 0 |ULTIMATE.start_foo_#in~b#1.offset|) (<= 0 |ULTIMATE.start_foo_~size#1|) (<= |ULTIMATE.start_foo_~i~0#1| (+ |ULTIMATE.start_foo_~size#1| 1)) (<= 0 |ULTIMATE.start_foo_#in~size#1|) (<= 0 |ULTIMATE.start_main_~#mask~0#1.base|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= |ULTIMATE.start_foo_~size#1| 0) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_foo_~b#1.offset| 0) (<= 0 |ULTIMATE.start_foo_~i~0#1|) (= |#NULL.base| 0))' at error location [2022-11-22 01:09:26,623 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:09:26,623 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:09:26,623 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2022-11-22 01:09:26,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422756551] [2022-11-22 01:09:26,623 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 01:09:26,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-22 01:09:26,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:09:26,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-22 01:09:26,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2022-11-22 01:09:26,625 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand has 11 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 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) [2022-11-22 01:09:26,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:09:26,907 INFO L93 Difference]: Finished difference Result 100 states and 120 transitions. [2022-11-22 01:09:26,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-22 01:09:26,908 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 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 8 [2022-11-22 01:09:26,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:09:26,910 INFO L225 Difference]: With dead ends: 100 [2022-11-22 01:09:26,910 INFO L226 Difference]: Without dead ends: 100 [2022-11-22 01:09:26,911 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2022-11-22 01:09:26,911 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 156 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 01:09:26,912 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [156 Valid, 31 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 01:09:26,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-11-22 01:09:26,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 47. [2022-11-22 01:09:26,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 40 states have (on average 1.525) internal successors, (61), 46 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:09:26,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 61 transitions. [2022-11-22 01:09:26,929 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 61 transitions. Word has length 8 [2022-11-22 01:09:26,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:09:26,930 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 61 transitions. [2022-11-22 01:09:26,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 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) [2022-11-22 01:09:26,930 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 61 transitions. [2022-11-22 01:09:26,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-22 01:09:26,931 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:09:26,931 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:09:26,941 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-22 01:09:27,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-22 01:09:27,132 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-22 01:09:27,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:09:27,132 INFO L85 PathProgramCache]: Analyzing trace with hash -725463176, now seen corresponding path program 1 times [2022-11-22 01:09:27,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:09:27,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242369899] [2022-11-22 01:09:27,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:09:27,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:09:27,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:09:27,176 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:09:27,177 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:09:27,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242369899] [2022-11-22 01:09:27,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242369899] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:09:27,177 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:09:27,177 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-22 01:09:27,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738455604] [2022-11-22 01:09:27,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:09:27,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:09:27,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:09:27,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:09:27,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:09:27,180 INFO L87 Difference]: Start difference. First operand 47 states and 61 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 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) [2022-11-22 01:09:27,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:09:27,202 INFO L93 Difference]: Finished difference Result 45 states and 59 transitions. [2022-11-22 01:09:27,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:09:27,207 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 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 10 [2022-11-22 01:09:27,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:09:27,210 INFO L225 Difference]: With dead ends: 45 [2022-11-22 01:09:27,211 INFO L226 Difference]: Without dead ends: 45 [2022-11-22 01:09:27,211 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:09:27,214 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 11 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 01:09:27,215 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 7 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 01:09:27,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-11-22 01:09:27,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2022-11-22 01:09:27,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 40 states have (on average 1.475) internal successors, (59), 44 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:09:27,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 59 transitions. [2022-11-22 01:09:27,228 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 59 transitions. Word has length 10 [2022-11-22 01:09:27,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:09:27,229 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 59 transitions. [2022-11-22 01:09:27,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 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) [2022-11-22 01:09:27,229 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 59 transitions. [2022-11-22 01:09:27,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-22 01:09:27,230 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:09:27,232 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:09:27,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-22 01:09:27,232 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-22 01:09:27,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:09:27,234 INFO L85 PathProgramCache]: Analyzing trace with hash -725463175, now seen corresponding path program 1 times [2022-11-22 01:09:27,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:09:27,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368529860] [2022-11-22 01:09:27,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:09:27,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:09:27,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:09:27,342 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:09:27,343 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:09:27,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368529860] [2022-11-22 01:09:27,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368529860] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:09:27,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7892258] [2022-11-22 01:09:27,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:09:27,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:09:27,344 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:09:27,345 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:09:27,369 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-22 01:09:27,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:09:27,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-22 01:09:27,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:09:27,453 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:09:27,453 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:09:27,496 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:09:27,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7892258] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:09:27,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1950596406] [2022-11-22 01:09:27,499 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-22 01:09:27,499 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:09:27,500 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:09:27,500 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:09:27,500 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:09:27,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:09:27,516 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-11-22 01:09:27,553 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 15 treesize of output 14 [2022-11-22 01:09:27,691 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 235 treesize of output 237 [2022-11-22 01:09:27,772 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 15 treesize of output 14 [2022-11-22 01:09:27,798 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 01:09:27,920 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 15 treesize of output 14 [2022-11-22 01:09:27,985 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 15 treesize of output 14 [2022-11-22 01:09:28,034 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 15 treesize of output 14 [2022-11-22 01:09:28,061 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 01:09:28,098 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 15 treesize of output 14 [2022-11-22 01:09:28,170 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 121 treesize of output 123 [2022-11-22 01:09:28,245 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 15 treesize of output 14 [2022-11-22 01:09:28,280 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 01:09:28,330 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 15 treesize of output 14 [2022-11-22 01:09:28,398 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 121 treesize of output 123 [2022-11-22 01:09:28,466 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 15 treesize of output 14 [2022-11-22 01:09:28,497 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:09:29,198 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '809#(and (= |ULTIMATE.start_main_~#mask~0#1.offset| 0) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start_main_~i~1#1| 0) (not (<= (+ |ULTIMATE.start_main_~#b~0#1.offset| (* |ULTIMATE.start_main_~i~1#1| 4) 4) (select |#length| |ULTIMATE.start_main_~#b~0#1.base|))) (<= 0 |ULTIMATE.start_main_~#mask~0#1.base|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-22 01:09:29,198 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:09:29,199 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:09:29,199 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4, 4] total 9 [2022-11-22 01:09:29,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369586286] [2022-11-22 01:09:29,199 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 01:09:29,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-22 01:09:29,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:09:29,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-22 01:09:29,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2022-11-22 01:09:29,201 INFO L87 Difference]: Start difference. First operand 45 states and 59 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 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) [2022-11-22 01:09:29,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:09:29,392 INFO L93 Difference]: Finished difference Result 48 states and 59 transitions. [2022-11-22 01:09:29,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-22 01:09:29,393 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 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 10 [2022-11-22 01:09:29,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:09:29,394 INFO L225 Difference]: With dead ends: 48 [2022-11-22 01:09:29,394 INFO L226 Difference]: Without dead ends: 48 [2022-11-22 01:09:29,394 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2022-11-22 01:09:29,395 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 78 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:09:29,395 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 6 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 01:09:29,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-11-22 01:09:29,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2022-11-22 01:09:29,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 41 states have (on average 1.3902439024390243) internal successors, (57), 45 states have internal predecessors, (57), 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) [2022-11-22 01:09:29,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 57 transitions. [2022-11-22 01:09:29,399 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 57 transitions. Word has length 10 [2022-11-22 01:09:29,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:09:29,399 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 57 transitions. [2022-11-22 01:09:29,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 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) [2022-11-22 01:09:29,400 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 57 transitions. [2022-11-22 01:09:29,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-22 01:09:29,400 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:09:29,400 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:09:29,415 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-22 01:09:29,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:09:29,605 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-22 01:09:29,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:09:29,606 INFO L85 PathProgramCache]: Analyzing trace with hash 1174809817, now seen corresponding path program 1 times [2022-11-22 01:09:29,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:09:29,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958046784] [2022-11-22 01:09:29,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:09:29,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:09:29,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:09:29,711 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-22 01:09:29,711 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:09:29,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958046784] [2022-11-22 01:09:29,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958046784] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:09:29,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493976112] [2022-11-22 01:09:29,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:09:29,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:09:29,713 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:09:29,714 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:09:29,724 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-22 01:09:29,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:09:29,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-22 01:09:29,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:09:30,008 WARN L859 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_main_~#mask~0#1.base_18| Int) (|v_ULTIMATE.start_main_~#b~0#1.base_25| Int) (v_ArrVal_101 Int)) (let ((.cse0 (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#b~0#1.base_25| 1))) (and (= |c_#valid| (store (store (store .cse0 |v_ULTIMATE.start_main_~#mask~0#1.base_18| v_ArrVal_101) |v_ULTIMATE.start_main_~#b~0#1.base_25| 0) |v_ULTIMATE.start_main_~#mask~0#1.base_18| 0)) (= (select |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#b~0#1.base_25|) 0) (= (select .cse0 |v_ULTIMATE.start_main_~#mask~0#1.base_18|) 0)))) is different from true [2022-11-22 01:09:30,009 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 01:09:30,009 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:09:30,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [493976112] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:09:30,009 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 01:09:30,009 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 5 [2022-11-22 01:09:30,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869885803] [2022-11-22 01:09:30,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:09:30,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 01:09:30,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:09:30,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 01:09:30,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=13, Unknown=1, NotChecked=6, Total=30 [2022-11-22 01:09:30,010 INFO L87 Difference]: Start difference. First operand 46 states and 57 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 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) [2022-11-22 01:09:30,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:09:30,037 INFO L93 Difference]: Finished difference Result 47 states and 57 transitions. [2022-11-22 01:09:30,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 01:09:30,038 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-22 01:09:30,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:09:30,038 INFO L225 Difference]: With dead ends: 47 [2022-11-22 01:09:30,038 INFO L226 Difference]: Without dead ends: 46 [2022-11-22 01:09:30,038 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=13, Unknown=1, NotChecked=6, Total=30 [2022-11-22 01:09:30,039 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 5 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 17 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 01:09:30,039 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 6 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 17 Unchecked, 0.0s Time] [2022-11-22 01:09:30,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-11-22 01:09:30,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2022-11-22 01:09:30,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 41 states have (on average 1.3658536585365855) internal successors, (56), 45 states have internal predecessors, (56), 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) [2022-11-22 01:09:30,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 56 transitions. [2022-11-22 01:09:30,042 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 56 transitions. Word has length 15 [2022-11-22 01:09:30,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:09:30,043 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 56 transitions. [2022-11-22 01:09:30,043 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), 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) [2022-11-22 01:09:30,043 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 56 transitions. [2022-11-22 01:09:30,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-22 01:09:30,043 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:09:30,043 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:09:30,064 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-11-22 01:09:30,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-22 01:09:30,250 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-22 01:09:30,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:09:30,251 INFO L85 PathProgramCache]: Analyzing trace with hash 2059371235, now seen corresponding path program 1 times [2022-11-22 01:09:30,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:09:30,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831333135] [2022-11-22 01:09:30,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:09:30,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:09:30,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:09:30,350 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 01:09:30,350 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:09:30,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831333135] [2022-11-22 01:09:30,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831333135] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:09:30,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326139756] [2022-11-22 01:09:30,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:09:30,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:09:30,351 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:09:30,352 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:09:30,356 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-22 01:09:30,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:09:30,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-22 01:09:30,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:09:30,561 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 01:09:30,605 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:09:30,608 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 01:09:30,608 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2022-11-22 01:09:30,623 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:09:30,624 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:09:30,680 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 14 treesize of output 12 [2022-11-22 01:09:30,685 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2022-11-22 01:09:30,809 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:09:30,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [326139756] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:09:30,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [767679377] [2022-11-22 01:09:30,812 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-11-22 01:09:30,812 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:09:30,813 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:09:30,813 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:09:30,813 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:09:30,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:09:30,829 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-11-22 01:09:30,863 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 [2022-11-22 01:09:31,000 INFO L321 Elim1Store]: treesize reduction 18, result has 33.3 percent of original size [2022-11-22 01:09:31,001 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 225 treesize of output 231 [2022-11-22 01:09:31,094 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 15 treesize of output 14 [2022-11-22 01:09:31,121 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 01:09:31,225 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 [2022-11-22 01:09:31,291 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 15 treesize of output 14 [2022-11-22 01:09:31,334 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 15 treesize of output 14 [2022-11-22 01:09:31,358 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 01:09:31,391 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 [2022-11-22 01:09:31,471 INFO L321 Elim1Store]: treesize reduction 18, result has 33.3 percent of original size [2022-11-22 01:09:31,471 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 111 treesize of output 117 [2022-11-22 01:09:31,527 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 15 treesize of output 14 [2022-11-22 01:09:31,549 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 01:09:31,575 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 15 treesize of output 14 [2022-11-22 01:09:31,644 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 121 treesize of output 123 [2022-11-22 01:09:31,722 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 15 treesize of output 14 [2022-11-22 01:09:31,827 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-22 01:09:31,827 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 1 case distinctions, treesize of input 9 treesize of output 11 [2022-11-22 01:09:31,865 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:09:32,863 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1174#(and (<= 0 |ULTIMATE.start_main_~i~1#1|) (not (= |ULTIMATE.start_main_old_#valid#1| |#valid|)) (exists ((|v_ULTIMATE.start_main_~#b~0#1.base_26| Int)) (and (<= 0 |v_ULTIMATE.start_main_~#b~0#1.base_26|) (= (select |#valid| |v_ULTIMATE.start_main_~#b~0#1.base_26|) 0))) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (not (< (mod |ULTIMATE.start_main_~i~1#1| 4294967296) 32)) (= |ULTIMATE.start_main_#res#1| 0) (= |#NULL.base| 0))' at error location [2022-11-22 01:09:32,863 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:09:32,863 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:09:32,863 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 9, 9] total 18 [2022-11-22 01:09:32,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953690469] [2022-11-22 01:09:32,864 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 01:09:32,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-22 01:09:32,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:09:32,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-22 01:09:32,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=645, Unknown=0, NotChecked=0, Total=756 [2022-11-22 01:09:32,865 INFO L87 Difference]: Start difference. First operand 46 states and 56 transitions. Second operand has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:09:33,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:09:33,070 INFO L93 Difference]: Finished difference Result 72 states and 86 transitions. [2022-11-22 01:09:33,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-22 01:09:33,071 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-22 01:09:33,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:09:33,071 INFO L225 Difference]: With dead ends: 72 [2022-11-22 01:09:33,071 INFO L226 Difference]: Without dead ends: 72 [2022-11-22 01:09:33,072 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=130, Invalid=740, Unknown=0, NotChecked=0, Total=870 [2022-11-22 01:09:33,072 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 43 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 01:09:33,073 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 38 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 01:09:33,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-11-22 01:09:33,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 49. [2022-11-22 01:09:33,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 44 states have (on average 1.3409090909090908) internal successors, (59), 48 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:09:33,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 59 transitions. [2022-11-22 01:09:33,077 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 59 transitions. Word has length 16 [2022-11-22 01:09:33,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:09:33,077 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 59 transitions. [2022-11-22 01:09:33,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:09:33,077 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 59 transitions. [2022-11-22 01:09:33,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-22 01:09:33,078 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:09:33,078 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1] [2022-11-22 01:09:33,089 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-22 01:09:33,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:09:33,279 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-22 01:09:33,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:09:33,280 INFO L85 PathProgramCache]: Analyzing trace with hash -26544458, now seen corresponding path program 2 times [2022-11-22 01:09:33,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:09:33,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926206283] [2022-11-22 01:09:33,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:09:33,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:09:33,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:09:33,393 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 20 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:09:33,393 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:09:33,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926206283] [2022-11-22 01:09:33,394 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926206283] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:09:33,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670344175] [2022-11-22 01:09:33,394 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 01:09:33,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:09:33,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:09:33,396 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:09:33,413 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-22 01:09:33,466 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-22 01:09:33,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:09:33,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-22 01:09:33,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:09:33,495 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-22 01:09:33,496 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-11-22 01:09:33,649 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-22 01:09:33,649 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:09:33,813 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-22 01:09:33,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [670344175] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:09:33,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1664663371] [2022-11-22 01:09:33,816 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2022-11-22 01:09:33,816 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:09:33,816 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:09:33,817 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:09:33,817 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:09:33,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:09:33,828 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-11-22 01:09:33,858 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 [2022-11-22 01:09:33,990 INFO L321 Elim1Store]: treesize reduction 18, result has 33.3 percent of original size [2022-11-22 01:09:33,990 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 225 treesize of output 231 [2022-11-22 01:09:34,064 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 15 treesize of output 14 [2022-11-22 01:09:34,080 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:09:34,634 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1420#(and (<= |ULTIMATE.start_foo_#in~b#1.offset| 0) (not (<= (+ |ULTIMATE.start_foo_~i~0#1| |ULTIMATE.start_foo_~b#1.offset| 1) (select |#length| |ULTIMATE.start_foo_~b#1.base|))) (= |ULTIMATE.start_main_~#mask~0#1.offset| 0) (<= |ULTIMATE.start_foo_#in~size#1| 0) (<= 0 |ULTIMATE.start_foo_~b#1.offset|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start_main_~i~1#1| 0) (<= 0 |ULTIMATE.start_foo_#in~b#1.base|) (<= 0 |ULTIMATE.start_foo_~b#1.base|) (<= 0 |ULTIMATE.start_foo_#in~b#1.offset|) (<= 0 |ULTIMATE.start_foo_~size#1|) (<= |ULTIMATE.start_foo_~i~0#1| (+ |ULTIMATE.start_foo_~size#1| 1)) (<= 0 |ULTIMATE.start_foo_#in~size#1|) (<= 0 |ULTIMATE.start_main_~#mask~0#1.base|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= |ULTIMATE.start_foo_~size#1| 0) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_foo_~b#1.offset| 0) (<= 0 |ULTIMATE.start_foo_~i~0#1|) (= |#NULL.base| 0))' at error location [2022-11-22 01:09:34,634 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:09:34,634 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:09:34,634 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4, 4] total 15 [2022-11-22 01:09:34,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183813650] [2022-11-22 01:09:34,635 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 01:09:34,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-22 01:09:34,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:09:34,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-22 01:09:34,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2022-11-22 01:09:34,637 INFO L87 Difference]: Start difference. First operand 49 states and 59 transitions. Second operand has 16 states, 16 states have (on average 2.1875) internal successors, (35), 15 states have internal predecessors, (35), 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) [2022-11-22 01:09:35,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:09:35,185 INFO L93 Difference]: Finished difference Result 70 states and 82 transitions. [2022-11-22 01:09:35,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-22 01:09:35,186 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-22 01:09:35,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:09:35,187 INFO L225 Difference]: With dead ends: 70 [2022-11-22 01:09:35,187 INFO L226 Difference]: Without dead ends: 70 [2022-11-22 01:09:35,188 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 33 SyntacticMatches, 5 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=168, Invalid=762, Unknown=0, NotChecked=0, Total=930 [2022-11-22 01:09:35,189 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 88 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 01:09:35,189 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 20 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 01:09:35,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-11-22 01:09:35,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 49. [2022-11-22 01:09:35,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 44 states have (on average 1.2954545454545454) internal successors, (57), 48 states have internal predecessors, (57), 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) [2022-11-22 01:09:35,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2022-11-22 01:09:35,193 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 17 [2022-11-22 01:09:35,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:09:35,193 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2022-11-22 01:09:35,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 15 states have internal predecessors, (35), 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) [2022-11-22 01:09:35,194 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2022-11-22 01:09:35,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-22 01:09:35,194 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:09:35,195 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 1, 1, 1, 1] [2022-11-22 01:09:35,202 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-22 01:09:35,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-22 01:09:35,403 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-22 01:09:35,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:09:35,403 INFO L85 PathProgramCache]: Analyzing trace with hash 1892592084, now seen corresponding path program 1 times [2022-11-22 01:09:35,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:09:35,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246477782] [2022-11-22 01:09:35,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:09:35,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:09:35,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:09:35,483 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 19 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 01:09:35,483 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:09:35,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246477782] [2022-11-22 01:09:35,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246477782] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:09:35,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229672076] [2022-11-22 01:09:35,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:09:35,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:09:35,485 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:09:35,486 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:09:35,514 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-22 01:09:35,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:09:35,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-22 01:09:35,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:09:35,601 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 19 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 01:09:35,602 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:09:35,643 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 19 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 01:09:35,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1229672076] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:09:35,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1636441439] [2022-11-22 01:09:35,645 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-22 01:09:35,646 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:09:35,646 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:09:35,646 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:09:35,646 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:09:35,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:09:35,660 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-11-22 01:09:35,690 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 15 treesize of output 14 [2022-11-22 01:09:35,804 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 235 treesize of output 237 [2022-11-22 01:09:35,875 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 15 treesize of output 14 [2022-11-22 01:09:35,899 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 01:09:35,981 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 15 treesize of output 14 [2022-11-22 01:09:36,044 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 15 treesize of output 14 [2022-11-22 01:09:36,102 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 15 treesize of output 14 [2022-11-22 01:09:36,141 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 01:09:36,178 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 [2022-11-22 01:09:36,257 INFO L321 Elim1Store]: treesize reduction 18, result has 33.3 percent of original size [2022-11-22 01:09:36,258 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 111 treesize of output 117 [2022-11-22 01:09:36,313 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 15 treesize of output 14 [2022-11-22 01:09:36,338 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 01:09:36,366 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 15 treesize of output 14 [2022-11-22 01:09:36,451 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 121 treesize of output 123 [2022-11-22 01:09:36,537 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 15 treesize of output 14 [2022-11-22 01:09:36,568 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:09:37,229 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1682#(and (<= |ULTIMATE.start_foo_#in~b#1.offset| 0) (<= 0 |ULTIMATE.start_foo_~b#1.offset|) (not (< (mod |ULTIMATE.start_foo_~i~0#1| 4294967296) 33)) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_foo_#in~b#1.base|) (<= 0 |ULTIMATE.start_foo_~b#1.base|) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_foo_#in~b#1.offset|) (<= |ULTIMATE.start_main_~#mask~0#1.offset| 0) (<= |ULTIMATE.start_foo_~i~0#1| (+ |ULTIMATE.start_foo_~size#1| 1)) (<= 0 |ULTIMATE.start_foo_#in~size#1|) (<= 0 |ULTIMATE.start_main_~#mask~0#1.base|) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#mask~0#1.offset|) (<= |ULTIMATE.start_foo_~b#1.offset| 0) (<= 0 |ULTIMATE.start_foo_~i~0#1|) (= |#NULL.base| 0))' at error location [2022-11-22 01:09:37,230 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:09:37,230 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:09:37,230 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2022-11-22 01:09:37,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488832195] [2022-11-22 01:09:37,230 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 01:09:37,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-22 01:09:37,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:09:37,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-22 01:09:37,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2022-11-22 01:09:37,232 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand has 9 states, 8 states have (on average 3.5) internal successors, (28), 9 states have internal predecessors, (28), 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) [2022-11-22 01:09:37,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:09:37,395 INFO L93 Difference]: Finished difference Result 119 states and 135 transitions. [2022-11-22 01:09:37,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-22 01:09:37,395 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.5) internal successors, (28), 9 states have internal predecessors, (28), 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 19 [2022-11-22 01:09:37,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:09:37,396 INFO L225 Difference]: With dead ends: 119 [2022-11-22 01:09:37,397 INFO L226 Difference]: Without dead ends: 119 [2022-11-22 01:09:37,400 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2022-11-22 01:09:37,403 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 81 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:09:37,405 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 43 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 01:09:37,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-11-22 01:09:37,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 66. [2022-11-22 01:09:37,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 61 states have (on average 1.2950819672131149) internal successors, (79), 65 states have internal predecessors, (79), 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) [2022-11-22 01:09:37,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 79 transitions. [2022-11-22 01:09:37,429 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 79 transitions. Word has length 19 [2022-11-22 01:09:37,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:09:37,429 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 79 transitions. [2022-11-22 01:09:37,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.5) internal successors, (28), 9 states have internal predecessors, (28), 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) [2022-11-22 01:09:37,430 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 79 transitions. [2022-11-22 01:09:37,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-22 01:09:37,430 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:09:37,430 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 1, 1, 1] [2022-11-22 01:09:37,445 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-22 01:09:37,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-22 01:09:37,645 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-22 01:09:37,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:09:37,646 INFO L85 PathProgramCache]: Analyzing trace with hash 1892594115, now seen corresponding path program 1 times [2022-11-22 01:09:37,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:09:37,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253952734] [2022-11-22 01:09:37,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:09:37,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:09:37,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:09:37,784 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-22 01:09:37,785 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:09:37,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253952734] [2022-11-22 01:09:37,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253952734] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:09:37,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049437336] [2022-11-22 01:09:37,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:09:37,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:09:37,786 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:09:37,787 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:09:37,804 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-22 01:09:37,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:09:37,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-22 01:09:37,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:09:37,926 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-22 01:09:37,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:09:37,995 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-22 01:09:37,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049437336] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:09:37,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [352549075] [2022-11-22 01:09:38,001 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-22 01:09:38,001 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:09:38,002 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:09:38,002 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:09:38,002 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:09:38,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:09:38,018 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-11-22 01:09:38,048 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 [2022-11-22 01:09:38,161 INFO L321 Elim1Store]: treesize reduction 18, result has 33.3 percent of original size [2022-11-22 01:09:38,161 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 225 treesize of output 231 [2022-11-22 01:09:38,238 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 15 treesize of output 14 [2022-11-22 01:09:38,277 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 01:09:38,361 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 [2022-11-22 01:09:38,432 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 15 treesize of output 14 [2022-11-22 01:09:38,471 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 01:09:38,513 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 15 treesize of output 14 [2022-11-22 01:09:38,584 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 121 treesize of output 123 [2022-11-22 01:09:38,666 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 15 treesize of output 14 [2022-11-22 01:09:38,696 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 01:09:38,722 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 [2022-11-22 01:09:38,797 INFO L321 Elim1Store]: treesize reduction 18, result has 33.3 percent of original size [2022-11-22 01:09:38,798 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 111 treesize of output 117 [2022-11-22 01:09:38,857 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 15 treesize of output 14 [2022-11-22 01:09:38,878 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:09:39,291 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2001#(and (<= |ULTIMATE.start_foo_#in~b#1.offset| 0) (= |ULTIMATE.start_main_~#mask~0#1.offset| 0) (<= 0 |ULTIMATE.start_foo_~b#1.offset|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (= |ULTIMATE.start_main_#t~ret3#1| |ULTIMATE.start_foo_#res#1|) (<= 0 |ULTIMATE.start_foo_#in~b#1.base|) (not (<= |ULTIMATE.start_foo_~i~0#1| (+ |ULTIMATE.start_foo_~size#1| 1))) (<= 0 |ULTIMATE.start_foo_~b#1.base|) (<= 0 |ULTIMATE.start_foo_#in~b#1.offset|) (<= 0 |ULTIMATE.start_foo_~size#1|) (not (<= (+ |ULTIMATE.start_main_~#b~0#1.offset| (* |ULTIMATE.start_main_~i~1#1| 4) 4) (select |#length| |ULTIMATE.start_main_~#b~0#1.base|))) (<= 0 |ULTIMATE.start_foo_#in~size#1|) (<= 0 |ULTIMATE.start_main_~#mask~0#1.base|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= |ULTIMATE.start_main_#t~ret3#1| 2147483647) (= |ULTIMATE.start_foo_~i~0#1| |ULTIMATE.start_foo_#res#1|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_foo_~b#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-11-22 01:09:39,291 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:09:39,291 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:09:39,292 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2022-11-22 01:09:39,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771665912] [2022-11-22 01:09:39,292 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 01:09:39,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-22 01:09:39,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:09:39,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-22 01:09:39,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2022-11-22 01:09:39,293 INFO L87 Difference]: Start difference. First operand 66 states and 79 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 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) [2022-11-22 01:09:39,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:09:39,467 INFO L93 Difference]: Finished difference Result 66 states and 77 transitions. [2022-11-22 01:09:39,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-22 01:09:39,467 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 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 19 [2022-11-22 01:09:39,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:09:39,468 INFO L225 Difference]: With dead ends: 66 [2022-11-22 01:09:39,468 INFO L226 Difference]: Without dead ends: 66 [2022-11-22 01:09:39,468 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=127, Invalid=473, Unknown=0, NotChecked=0, Total=600 [2022-11-22 01:09:39,468 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 63 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:09:39,469 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 4 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 01:09:39,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-11-22 01:09:39,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2022-11-22 01:09:39,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 61 states have (on average 1.2622950819672132) internal successors, (77), 65 states have internal predecessors, (77), 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) [2022-11-22 01:09:39,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 77 transitions. [2022-11-22 01:09:39,473 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 77 transitions. Word has length 19 [2022-11-22 01:09:39,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:09:39,473 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 77 transitions. [2022-11-22 01:09:39,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 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) [2022-11-22 01:09:39,474 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 77 transitions. [2022-11-22 01:09:39,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-22 01:09:39,474 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:09:39,474 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 2, 2, 1, 1, 1] [2022-11-22 01:09:39,484 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-11-22 01:09:39,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:09:39,680 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-22 01:09:39,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:09:39,681 INFO L85 PathProgramCache]: Analyzing trace with hash -2119785853, now seen corresponding path program 2 times [2022-11-22 01:09:39,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:09:39,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46712254] [2022-11-22 01:09:39,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:09:39,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:09:39,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:09:39,959 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-22 01:09:39,959 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:09:39,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46712254] [2022-11-22 01:09:39,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46712254] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:09:39,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656152914] [2022-11-22 01:09:39,960 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 01:09:39,960 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:09:39,960 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:09:39,961 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:09:39,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-22 01:09:40,036 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-22 01:09:40,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:09:40,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-22 01:09:40,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:09:40,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:09:40,061 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 9 treesize of output 11 [2022-11-22 01:09:40,066 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 10 treesize of output 8 [2022-11-22 01:09:40,311 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-22 01:09:40,312 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:09:40,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1656152914] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:09:40,312 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 01:09:40,312 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [3] total 7 [2022-11-22 01:09:40,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510491727] [2022-11-22 01:09:40,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:09:40,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-22 01:09:40,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:09:40,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-22 01:09:40,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-11-22 01:09:40,314 INFO L87 Difference]: Start difference. First operand 66 states and 77 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:09:40,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:09:40,389 INFO L93 Difference]: Finished difference Result 65 states and 76 transitions. [2022-11-22 01:09:40,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-22 01:09:40,390 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-11-22 01:09:40,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:09:40,391 INFO L225 Difference]: With dead ends: 65 [2022-11-22 01:09:40,391 INFO L226 Difference]: Without dead ends: 65 [2022-11-22 01:09:40,391 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-22 01:09:40,392 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 15 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:09:40,392 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 11 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 01:09:40,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-11-22 01:09:40,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2022-11-22 01:09:40,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 61 states have (on average 1.2459016393442623) internal successors, (76), 64 states have internal predecessors, (76), 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) [2022-11-22 01:09:40,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 76 transitions. [2022-11-22 01:09:40,395 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 76 transitions. Word has length 22 [2022-11-22 01:09:40,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:09:40,396 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 76 transitions. [2022-11-22 01:09:40,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:09:40,396 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 76 transitions. [2022-11-22 01:09:40,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-22 01:09:40,397 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:09:40,397 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2022-11-22 01:09:40,407 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-22 01:09:40,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-22 01:09:40,598 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-22 01:09:40,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:09:40,598 INFO L85 PathProgramCache]: Analyzing trace with hash -934045657, now seen corresponding path program 1 times [2022-11-22 01:09:40,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:09:40,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204555030] [2022-11-22 01:09:40,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:09:40,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:09:40,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:09:40,729 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-22 01:09:40,729 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:09:40,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204555030] [2022-11-22 01:09:40,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204555030] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:09:40,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672306629] [2022-11-22 01:09:40,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:09:40,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:09:40,730 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:09:40,732 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:09:40,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-22 01:09:40,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:09:40,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-22 01:09:40,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:09:40,996 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 26 proven. 4 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-22 01:09:40,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:09:41,065 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 25 treesize of output 21 [2022-11-22 01:09:41,168 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 26 proven. 4 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-22 01:09:41,169 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1672306629] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:09:41,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1002758406] [2022-11-22 01:09:41,171 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-22 01:09:41,171 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:09:41,171 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:09:41,172 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:09:41,172 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:09:41,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:09:41,185 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-11-22 01:09:41,213 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 [2022-11-22 01:09:41,326 INFO L321 Elim1Store]: treesize reduction 18, result has 33.3 percent of original size [2022-11-22 01:09:41,327 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 225 treesize of output 231 [2022-11-22 01:09:41,408 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 15 treesize of output 14 [2022-11-22 01:09:41,427 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 01:09:41,537 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 [2022-11-22 01:09:41,602 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 15 treesize of output 14 [2022-11-22 01:09:41,639 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 01:09:41,677 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 [2022-11-22 01:09:41,747 INFO L321 Elim1Store]: treesize reduction 18, result has 33.3 percent of original size [2022-11-22 01:09:41,747 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 111 treesize of output 117 [2022-11-22 01:09:41,796 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 15 treesize of output 14 [2022-11-22 01:09:41,814 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 01:09:41,835 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 [2022-11-22 01:09:41,905 INFO L321 Elim1Store]: treesize reduction 18, result has 33.3 percent of original size [2022-11-22 01:09:41,906 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 111 treesize of output 117 [2022-11-22 01:09:41,970 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 15 treesize of output 14 [2022-11-22 01:09:42,028 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:09:42,503 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2530#(and (= |ULTIMATE.start_main_~#mask~0#1.offset| 0) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (not (<= (+ |ULTIMATE.start_main_~#b~0#1.offset| (* |ULTIMATE.start_main_~i~1#1| 4) 4) (select |#length| |ULTIMATE.start_main_~#b~0#1.base|))) (<= 0 |ULTIMATE.start_main_~#mask~0#1.base|) (= |#NULL.offset| 0) (< (mod |ULTIMATE.start_main_~i~1#1| 4294967296) 32) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-22 01:09:42,503 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:09:42,503 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:09:42,503 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 14 [2022-11-22 01:09:42,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800986766] [2022-11-22 01:09:42,504 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 01:09:42,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-22 01:09:42,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:09:42,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-22 01:09:42,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=408, Unknown=0, NotChecked=0, Total=506 [2022-11-22 01:09:42,507 INFO L87 Difference]: Start difference. First operand 65 states and 76 transitions. Second operand has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 states have internal predecessors, (56), 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) [2022-11-22 01:09:42,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:09:42,707 INFO L93 Difference]: Finished difference Result 97 states and 112 transitions. [2022-11-22 01:09:42,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-22 01:09:42,708 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 states have internal predecessors, (56), 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 28 [2022-11-22 01:09:42,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:09:42,708 INFO L225 Difference]: With dead ends: 97 [2022-11-22 01:09:42,708 INFO L226 Difference]: Without dead ends: 97 [2022-11-22 01:09:42,709 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=143, Invalid=559, Unknown=0, NotChecked=0, Total=702 [2022-11-22 01:09:42,709 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 107 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:09:42,710 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 35 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 01:09:42,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-11-22 01:09:42,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 70. [2022-11-22 01:09:42,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 66 states have (on average 1.2272727272727273) internal successors, (81), 69 states have internal predecessors, (81), 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) [2022-11-22 01:09:42,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 81 transitions. [2022-11-22 01:09:42,713 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 81 transitions. Word has length 28 [2022-11-22 01:09:42,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:09:42,714 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 81 transitions. [2022-11-22 01:09:42,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 states have internal predecessors, (56), 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) [2022-11-22 01:09:42,714 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 81 transitions. [2022-11-22 01:09:42,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-22 01:09:42,715 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:09:42,715 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 2, 1, 1, 1, 1] [2022-11-22 01:09:42,725 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-11-22 01:09:42,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-22 01:09:42,920 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-22 01:09:42,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:09:42,921 INFO L85 PathProgramCache]: Analyzing trace with hash -186959404, now seen corresponding path program 2 times [2022-11-22 01:09:42,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:09:42,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708912934] [2022-11-22 01:09:42,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:09:42,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:09:42,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:09:43,136 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 43 proven. 62 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-22 01:09:43,136 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:09:43,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708912934] [2022-11-22 01:09:43,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708912934] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:09:43,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917583442] [2022-11-22 01:09:43,136 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 01:09:43,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:09:43,137 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:09:43,137 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:09:43,140 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-22 01:09:43,200 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-22 01:09:43,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:09:43,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-22 01:09:43,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:09:43,371 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-11-22 01:09:43,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:09:43,656 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-11-22 01:09:43,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1917583442] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:09:43,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2068594506] [2022-11-22 01:09:43,658 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-22 01:09:43,658 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:09:43,659 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:09:43,659 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:09:43,659 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:09:43,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:09:43,671 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-11-22 01:09:43,697 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 [2022-11-22 01:09:43,813 INFO L321 Elim1Store]: treesize reduction 18, result has 33.3 percent of original size [2022-11-22 01:09:43,814 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 225 treesize of output 231 [2022-11-22 01:09:43,911 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 15 treesize of output 14 [2022-11-22 01:09:43,930 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 01:09:44,013 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 [2022-11-22 01:09:44,081 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 15 treesize of output 14 [2022-11-22 01:09:44,119 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 01:09:44,153 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 15 treesize of output 14 [2022-11-22 01:09:44,211 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 121 treesize of output 123 [2022-11-22 01:09:44,267 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 15 treesize of output 14 [2022-11-22 01:09:44,320 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 16 treesize of output 12 [2022-11-22 01:09:44,340 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 15 treesize of output 14 [2022-11-22 01:09:44,441 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 121 treesize of output 123 [2022-11-22 01:09:44,524 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 15 treesize of output 14 [2022-11-22 01:09:44,550 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:09:45,248 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2914#(and (<= |ULTIMATE.start_foo_#in~b#1.offset| 0) (<= 0 |ULTIMATE.start_foo_~b#1.offset|) (not (< (mod |ULTIMATE.start_foo_~i~0#1| 4294967296) 33)) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_foo_#in~b#1.base|) (<= 0 |ULTIMATE.start_foo_~b#1.base|) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_foo_#in~b#1.offset|) (<= |ULTIMATE.start_main_~#mask~0#1.offset| 0) (<= |ULTIMATE.start_foo_~i~0#1| (+ |ULTIMATE.start_foo_~size#1| 1)) (<= 0 |ULTIMATE.start_foo_#in~size#1|) (<= 0 |ULTIMATE.start_main_~#mask~0#1.base|) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#mask~0#1.offset|) (<= |ULTIMATE.start_foo_~b#1.offset| 0) (<= 0 |ULTIMATE.start_foo_~i~0#1|) (= |#NULL.base| 0))' at error location [2022-11-22 01:09:45,248 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:09:45,248 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:09:45,248 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5, 5] total 20 [2022-11-22 01:09:45,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190735715] [2022-11-22 01:09:45,248 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 01:09:45,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-22 01:09:45,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:09:45,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-22 01:09:45,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=598, Unknown=0, NotChecked=0, Total=702 [2022-11-22 01:09:45,250 INFO L87 Difference]: Start difference. First operand 70 states and 81 transitions. Second operand has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 20 states have internal predecessors, (56), 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) [2022-11-22 01:09:46,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:09:46,031 INFO L93 Difference]: Finished difference Result 119 states and 137 transitions. [2022-11-22 01:09:46,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-22 01:09:46,032 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 20 states have internal predecessors, (56), 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 31 [2022-11-22 01:09:46,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:09:46,033 INFO L225 Difference]: With dead ends: 119 [2022-11-22 01:09:46,033 INFO L226 Difference]: Without dead ends: 119 [2022-11-22 01:09:46,034 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 593 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=398, Invalid=1858, Unknown=0, NotChecked=0, Total=2256 [2022-11-22 01:09:46,035 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 287 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 01:09:46,035 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [287 Valid, 22 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 01:09:46,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-11-22 01:09:46,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 92. [2022-11-22 01:09:46,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 88 states have (on average 1.1931818181818181) internal successors, (105), 91 states have internal predecessors, (105), 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) [2022-11-22 01:09:46,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 105 transitions. [2022-11-22 01:09:46,039 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 105 transitions. Word has length 31 [2022-11-22 01:09:46,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:09:46,039 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 105 transitions. [2022-11-22 01:09:46,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 20 states have internal predecessors, (56), 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) [2022-11-22 01:09:46,040 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 105 transitions. [2022-11-22 01:09:46,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-22 01:09:46,041 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:09:46,041 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 3, 2, 2, 1, 1] [2022-11-22 01:09:46,064 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-22 01:09:46,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-22 01:09:46,247 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-22 01:09:46,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:09:46,247 INFO L85 PathProgramCache]: Analyzing trace with hash 486873334, now seen corresponding path program 1 times [2022-11-22 01:09:46,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:09:46,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952105731] [2022-11-22 01:09:46,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:09:46,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:09:46,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:09:46,454 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 30 proven. 113 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-22 01:09:46,454 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:09:46,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952105731] [2022-11-22 01:09:46,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952105731] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:09:46,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918319489] [2022-11-22 01:09:46,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:09:46,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:09:46,455 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:09:46,456 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:09:46,457 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-22 01:09:46,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:09:46,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-22 01:09:46,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:09:46,703 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 40 proven. 103 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-22 01:09:46,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:09:46,820 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 40 proven. 103 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-22 01:09:46,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1918319489] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:09:46,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [629040281] [2022-11-22 01:09:46,822 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-22 01:09:46,823 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:09:46,823 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:09:46,823 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:09:46,823 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:09:46,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:09:46,835 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-11-22 01:09:46,862 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 [2022-11-22 01:09:46,970 INFO L321 Elim1Store]: treesize reduction 18, result has 33.3 percent of original size [2022-11-22 01:09:46,970 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 225 treesize of output 231 [2022-11-22 01:09:47,063 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 15 treesize of output 14 [2022-11-22 01:09:47,085 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 01:09:47,150 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 15 treesize of output 14 [2022-11-22 01:09:47,203 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 15 treesize of output 14 [2022-11-22 01:09:47,241 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 01:09:47,277 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 [2022-11-22 01:09:47,352 INFO L321 Elim1Store]: treesize reduction 18, result has 33.3 percent of original size [2022-11-22 01:09:47,352 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 111 treesize of output 117 [2022-11-22 01:09:47,414 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 15 treesize of output 14 [2022-11-22 01:09:47,432 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 01:09:47,462 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 [2022-11-22 01:09:47,531 INFO L321 Elim1Store]: treesize reduction 18, result has 33.3 percent of original size [2022-11-22 01:09:47,531 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 111 treesize of output 117 [2022-11-22 01:09:47,583 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 15 treesize of output 14 [2022-11-22 01:09:47,598 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:09:48,027 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3412#(and (<= |ULTIMATE.start_foo_#in~b#1.offset| 0) (not (<= (+ |ULTIMATE.start_foo_~i~0#1| |ULTIMATE.start_foo_~b#1.offset| 1) (select |#length| |ULTIMATE.start_foo_~b#1.base|))) (= |ULTIMATE.start_main_~#mask~0#1.offset| 0) (<= 0 |ULTIMATE.start_foo_~b#1.offset|) (< (mod |ULTIMATE.start_foo_~i~0#1| 4294967296) 33) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_foo_#in~b#1.base|) (<= 0 |ULTIMATE.start_foo_~b#1.base|) (<= 0 |ULTIMATE.start_foo_#in~b#1.offset|) (<= 0 |ULTIMATE.start_foo_~size#1|) (<= |ULTIMATE.start_foo_~i~0#1| (+ |ULTIMATE.start_foo_~size#1| 1)) (<= 0 |ULTIMATE.start_foo_#in~size#1|) (<= 0 |ULTIMATE.start_main_~#mask~0#1.base|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_foo_~b#1.offset| 0) (<= 0 |ULTIMATE.start_foo_~i~0#1|) (= |#NULL.base| 0))' at error location [2022-11-22 01:09:48,028 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:09:48,028 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:09:48,028 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-11-22 01:09:48,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030416648] [2022-11-22 01:09:48,028 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 01:09:48,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-22 01:09:48,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:09:48,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-22 01:09:48,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2022-11-22 01:09:48,031 INFO L87 Difference]: Start difference. First operand 92 states and 105 transitions. Second operand has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 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) [2022-11-22 01:09:48,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:09:48,479 INFO L93 Difference]: Finished difference Result 127 states and 139 transitions. [2022-11-22 01:09:48,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-22 01:09:48,480 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 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 38 [2022-11-22 01:09:48,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:09:48,481 INFO L225 Difference]: With dead ends: 127 [2022-11-22 01:09:48,481 INFO L226 Difference]: Without dead ends: 127 [2022-11-22 01:09:48,482 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 93 SyntacticMatches, 7 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 537 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=430, Invalid=1462, Unknown=0, NotChecked=0, Total=1892 [2022-11-22 01:09:48,482 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 212 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 01:09:48,483 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [212 Valid, 21 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 01:09:48,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-11-22 01:09:48,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 90. [2022-11-22 01:09:48,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 86 states have (on average 1.1744186046511629) internal successors, (101), 89 states have internal predecessors, (101), 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) [2022-11-22 01:09:48,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 101 transitions. [2022-11-22 01:09:48,486 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 101 transitions. Word has length 38 [2022-11-22 01:09:48,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:09:48,487 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 101 transitions. [2022-11-22 01:09:48,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 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) [2022-11-22 01:09:48,487 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 101 transitions. [2022-11-22 01:09:48,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-22 01:09:48,488 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:09:48,488 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 3, 3, 3, 3, 2, 2, 1, 1, 1] [2022-11-22 01:09:48,501 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-22 01:09:48,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-22 01:09:48,694 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-22 01:09:48,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:09:48,694 INFO L85 PathProgramCache]: Analyzing trace with hash 1844675833, now seen corresponding path program 2 times [2022-11-22 01:09:48,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:09:48,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595742752] [2022-11-22 01:09:48,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:09:48,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:09:48,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:09:48,940 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 16 proven. 87 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-22 01:09:48,940 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:09:48,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595742752] [2022-11-22 01:09:48,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595742752] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:09:48,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895846360] [2022-11-22 01:09:48,941 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 01:09:48,942 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:09:48,942 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:09:48,943 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:09:48,957 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-22 01:09:49,063 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-22 01:09:49,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:09:49,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-22 01:09:49,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:09:49,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:09:49,076 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 9 treesize of output 11 [2022-11-22 01:09:49,081 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 10 treesize of output 8 [2022-11-22 01:09:49,313 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2022-11-22 01:09:49,313 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:09:49,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1895846360] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:09:49,314 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 01:09:49,314 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 12 [2022-11-22 01:09:49,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396967126] [2022-11-22 01:09:49,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:09:49,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-22 01:09:49,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:09:49,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-22 01:09:49,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2022-11-22 01:09:49,315 INFO L87 Difference]: Start difference. First operand 90 states and 101 transitions. Second operand has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:09:49,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:09:49,352 INFO L93 Difference]: Finished difference Result 89 states and 100 transitions. [2022-11-22 01:09:49,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 01:09:49,353 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-11-22 01:09:49,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:09:49,353 INFO L225 Difference]: With dead ends: 89 [2022-11-22 01:09:49,354 INFO L226 Difference]: Without dead ends: 89 [2022-11-22 01:09:49,354 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2022-11-22 01:09:49,355 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 24 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 01:09:49,355 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 11 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 01:09:49,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-11-22 01:09:49,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2022-11-22 01:09:49,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 86 states have (on average 1.1627906976744187) internal successors, (100), 88 states have internal predecessors, (100), 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) [2022-11-22 01:09:49,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 100 transitions. [2022-11-22 01:09:49,358 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 100 transitions. Word has length 43 [2022-11-22 01:09:49,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:09:49,359 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 100 transitions. [2022-11-22 01:09:49,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:09:49,359 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 100 transitions. [2022-11-22 01:09:49,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-22 01:09:49,360 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:09:49,360 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1] [2022-11-22 01:09:49,366 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-22 01:09:49,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:09:49,566 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-22 01:09:49,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:09:49,566 INFO L85 PathProgramCache]: Analyzing trace with hash 631207499, now seen corresponding path program 2 times [2022-11-22 01:09:49,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:09:49,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979388935] [2022-11-22 01:09:49,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:09:49,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:09:49,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:09:49,783 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 16 proven. 87 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-11-22 01:09:49,783 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:09:49,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979388935] [2022-11-22 01:09:49,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979388935] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:09:49,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272705986] [2022-11-22 01:09:49,784 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 01:09:49,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:09:49,784 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:09:49,785 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:09:49,808 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-22 01:09:49,869 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-22 01:09:49,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:09:49,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-22 01:09:49,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:09:50,196 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_400 Int) (|v_ULTIMATE.start_main_~#b~0#1.base_27| Int) (|v_ULTIMATE.start_main_~#mask~0#1.base_20| Int)) (let ((.cse0 (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#b~0#1.base_27| 1))) (and (= (select .cse0 |v_ULTIMATE.start_main_~#mask~0#1.base_20|) 0) (= (select |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#b~0#1.base_27|) 0) (= |c_#valid| (store (store (store .cse0 |v_ULTIMATE.start_main_~#mask~0#1.base_20| v_ArrVal_400) |v_ULTIMATE.start_main_~#b~0#1.base_27| 0) |v_ULTIMATE.start_main_~#mask~0#1.base_20| 0))))) is different from true [2022-11-22 01:09:50,197 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2022-11-22 01:09:50,197 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:09:50,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272705986] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:09:50,198 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 01:09:50,198 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [8] total 10 [2022-11-22 01:09:50,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898909356] [2022-11-22 01:09:50,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:09:50,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 01:09:50,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:09:50,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 01:09:50,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=65, Unknown=1, NotChecked=16, Total=110 [2022-11-22 01:09:50,200 INFO L87 Difference]: Start difference. First operand 89 states and 100 transitions. Second operand has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:09:50,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:09:50,215 INFO L93 Difference]: Finished difference Result 88 states and 99 transitions. [2022-11-22 01:09:50,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 01:09:50,216 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2022-11-22 01:09:50,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:09:50,216 INFO L225 Difference]: With dead ends: 88 [2022-11-22 01:09:50,216 INFO L226 Difference]: Without dead ends: 77 [2022-11-22 01:09:50,217 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=65, Unknown=1, NotChecked=16, Total=110 [2022-11-22 01:09:50,217 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 13 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 01:09:50,218 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 5 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 13 Unchecked, 0.0s Time] [2022-11-22 01:09:50,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-11-22 01:09:50,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2022-11-22 01:09:50,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 75 states have (on average 1.1466666666666667) internal successors, (86), 76 states have internal predecessors, (86), 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) [2022-11-22 01:09:50,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 86 transitions. [2022-11-22 01:09:50,221 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 86 transitions. Word has length 46 [2022-11-22 01:09:50,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:09:50,221 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 86 transitions. [2022-11-22 01:09:50,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:09:50,222 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 86 transitions. [2022-11-22 01:09:50,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-22 01:09:50,222 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:09:50,222 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 12, 4, 3, 3, 1, 1] [2022-11-22 01:09:50,228 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-11-22 01:09:50,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:09:50,427 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-22 01:09:50,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:09:50,428 INFO L85 PathProgramCache]: Analyzing trace with hash -412062966, now seen corresponding path program 2 times [2022-11-22 01:09:50,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:09:50,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009645203] [2022-11-22 01:09:50,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:09:50,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:09:50,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:09:50,653 INFO L134 CoverageAnalysis]: Checked inductivity of 285 backedges. 151 proven. 87 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-11-22 01:09:50,653 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:09:50,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009645203] [2022-11-22 01:09:50,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009645203] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:09:50,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101716450] [2022-11-22 01:09:50,654 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 01:09:50,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:09:50,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:09:50,656 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:09:50,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-22 01:09:50,778 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-22 01:09:50,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:09:50,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-22 01:09:50,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:09:50,795 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-22 01:09:50,796 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-11-22 01:09:51,081 INFO L134 CoverageAnalysis]: Checked inductivity of 285 backedges. 0 proven. 165 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-11-22 01:09:51,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:09:51,411 INFO L134 CoverageAnalysis]: Checked inductivity of 285 backedges. 0 proven. 165 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-11-22 01:09:51,411 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1101716450] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:09:51,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [155193467] [2022-11-22 01:09:51,413 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-22 01:09:51,413 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:09:51,414 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:09:51,414 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:09:51,414 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:09:51,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:09:51,426 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-11-22 01:09:51,450 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 15 treesize of output 14 [2022-11-22 01:09:51,530 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 235 treesize of output 237 [2022-11-22 01:09:51,599 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 15 treesize of output 14 [2022-11-22 01:09:51,617 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 01:09:51,671 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-22 01:09:51,727 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 15 treesize of output 14 [2022-11-22 01:09:51,756 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 15 treesize of output 14 [2022-11-22 01:09:51,778 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 01:09:51,807 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 15 treesize of output 14 [2022-11-22 01:09:51,870 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 121 treesize of output 123 [2022-11-22 01:09:51,924 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 15 treesize of output 14 [2022-11-22 01:09:51,955 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 01:09:51,977 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 15 treesize of output 14 [2022-11-22 01:09:52,040 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 121 treesize of output 123 [2022-11-22 01:09:52,107 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 15 treesize of output 14 [2022-11-22 01:09:52,134 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:09:52,838 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4620#(and (<= |ULTIMATE.start_foo_#in~b#1.offset| 0) (not (<= (+ |ULTIMATE.start_foo_~i~0#1| |ULTIMATE.start_foo_~b#1.offset| 1) (select |#length| |ULTIMATE.start_foo_~b#1.base|))) (<= 0 |ULTIMATE.start_foo_~b#1.offset|) (< (mod |ULTIMATE.start_foo_~i~0#1| 4294967296) 33) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_foo_#in~b#1.base|) (<= 0 |ULTIMATE.start_foo_~b#1.base|) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_foo_#in~b#1.offset|) (<= 0 |ULTIMATE.start_foo_~size#1|) (<= |ULTIMATE.start_main_~#mask~0#1.offset| 0) (<= |ULTIMATE.start_foo_~i~0#1| (+ |ULTIMATE.start_foo_~size#1| 1)) (<= 0 |ULTIMATE.start_foo_#in~size#1|) (<= 0 |ULTIMATE.start_main_~#mask~0#1.base|) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#mask~0#1.offset|) (<= |ULTIMATE.start_foo_~b#1.offset| 0) (<= 0 |ULTIMATE.start_foo_~i~0#1|) (= |#NULL.base| 0))' at error location [2022-11-22 01:09:52,838 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:09:52,838 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:09:52,838 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 20 [2022-11-22 01:09:52,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66368026] [2022-11-22 01:09:52,839 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 01:09:52,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-22 01:09:52,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:09:52,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-22 01:09:52,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=596, Unknown=0, NotChecked=0, Total=702 [2022-11-22 01:09:52,840 INFO L87 Difference]: Start difference. First operand 77 states and 86 transitions. Second operand has 21 states, 21 states have (on average 3.619047619047619) internal successors, (76), 20 states have internal predecessors, (76), 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) [2022-11-22 01:09:53,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:09:53,777 INFO L93 Difference]: Finished difference Result 124 states and 139 transitions. [2022-11-22 01:09:53,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-22 01:09:53,778 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.619047619047619) internal successors, (76), 20 states have internal predecessors, (76), 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 50 [2022-11-22 01:09:53,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:09:53,779 INFO L225 Difference]: With dead ends: 124 [2022-11-22 01:09:53,779 INFO L226 Difference]: Without dead ends: 124 [2022-11-22 01:09:53,780 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=443, Invalid=1813, Unknown=0, NotChecked=0, Total=2256 [2022-11-22 01:09:53,782 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 123 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 01:09:53,782 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 0 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 01:09:53,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-11-22 01:09:53,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 108. [2022-11-22 01:09:53,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 106 states have (on average 1.1981132075471699) internal successors, (127), 107 states have internal predecessors, (127), 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) [2022-11-22 01:09:53,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 127 transitions. [2022-11-22 01:09:53,788 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 127 transitions. Word has length 50 [2022-11-22 01:09:53,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:09:53,789 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 127 transitions. [2022-11-22 01:09:53,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.619047619047619) internal successors, (76), 20 states have internal predecessors, (76), 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) [2022-11-22 01:09:53,789 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 127 transitions. [2022-11-22 01:09:53,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-22 01:09:53,790 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:09:53,790 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 19, 4, 3, 3, 1, 1] [2022-11-22 01:09:53,799 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-22 01:09:53,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:09:53,996 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-22 01:09:53,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:09:53,997 INFO L85 PathProgramCache]: Analyzing trace with hash 2140007842, now seen corresponding path program 3 times [2022-11-22 01:09:53,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:09:53,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811772757] [2022-11-22 01:09:53,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:09:53,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:09:54,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:09:54,503 INFO L134 CoverageAnalysis]: Checked inductivity of 642 backedges. 155 proven. 448 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-22 01:09:54,504 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:09:54,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811772757] [2022-11-22 01:09:54,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811772757] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:09:54,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820670390] [2022-11-22 01:09:54,504 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-22 01:09:54,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:09:54,504 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:09:54,506 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:09:54,512 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-22 01:09:54,683 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-22 01:09:54,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:09:54,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-22 01:09:54,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:09:55,081 INFO L134 CoverageAnalysis]: Checked inductivity of 642 backedges. 183 proven. 420 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-22 01:09:55,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:09:55,413 INFO L134 CoverageAnalysis]: Checked inductivity of 642 backedges. 183 proven. 420 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-22 01:09:55,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820670390] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:09:55,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1888871188] [2022-11-22 01:09:55,416 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-22 01:09:55,416 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:09:55,417 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:09:55,418 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:09:55,418 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:09:55,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:09:55,432 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-11-22 01:09:55,458 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 [2022-11-22 01:09:55,545 INFO L321 Elim1Store]: treesize reduction 18, result has 33.3 percent of original size [2022-11-22 01:09:55,545 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 225 treesize of output 231 [2022-11-22 01:09:55,610 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 15 treesize of output 14 [2022-11-22 01:09:55,636 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 01:09:55,691 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 15 treesize of output 14 [2022-11-22 01:09:55,744 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 15 treesize of output 14 [2022-11-22 01:09:55,778 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 01:09:55,814 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 15 treesize of output 14 [2022-11-22 01:09:55,871 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 121 treesize of output 123 [2022-11-22 01:09:55,927 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 15 treesize of output 14 [2022-11-22 01:09:55,962 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 01:09:55,982 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 15 treesize of output 14 [2022-11-22 01:09:56,037 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 121 treesize of output 123 [2022-11-22 01:09:56,090 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 15 treesize of output 14 [2022-11-22 01:09:56,123 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:09:56,977 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5359#(and (<= |ULTIMATE.start_foo_#in~b#1.offset| 0) (not (<= (+ |ULTIMATE.start_foo_~i~0#1| |ULTIMATE.start_foo_~b#1.offset| 1) (select |#length| |ULTIMATE.start_foo_~b#1.base|))) (<= 0 |ULTIMATE.start_foo_~b#1.offset|) (< (mod |ULTIMATE.start_foo_~i~0#1| 4294967296) 33) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_foo_#in~b#1.base|) (<= 0 |ULTIMATE.start_foo_~b#1.base|) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_foo_#in~b#1.offset|) (<= 0 |ULTIMATE.start_foo_~size#1|) (<= |ULTIMATE.start_main_~#mask~0#1.offset| 0) (<= |ULTIMATE.start_foo_~i~0#1| (+ |ULTIMATE.start_foo_~size#1| 1)) (<= 0 |ULTIMATE.start_foo_#in~size#1|) (<= 0 |ULTIMATE.start_main_~#mask~0#1.base|) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#mask~0#1.offset|) (<= |ULTIMATE.start_foo_~b#1.offset| 0) (<= 0 |ULTIMATE.start_foo_~i~0#1|) (= |#NULL.base| 0))' at error location [2022-11-22 01:09:56,977 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:09:56,978 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:09:56,978 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 38 [2022-11-22 01:09:56,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791907006] [2022-11-22 01:09:56,978 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 01:09:56,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-22 01:09:56,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:09:56,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-22 01:09:56,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=449, Invalid=1531, Unknown=0, NotChecked=0, Total=1980 [2022-11-22 01:09:56,980 INFO L87 Difference]: Start difference. First operand 108 states and 127 transitions. Second operand has 39 states, 39 states have (on average 3.358974358974359) internal successors, (131), 38 states have internal predecessors, (131), 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) [2022-11-22 01:09:58,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:09:58,606 INFO L93 Difference]: Finished difference Result 218 states and 248 transitions. [2022-11-22 01:09:58,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-11-22 01:09:58,609 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 3.358974358974359) internal successors, (131), 38 states have internal predecessors, (131), 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 71 [2022-11-22 01:09:58,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:09:58,611 INFO L225 Difference]: With dead ends: 218 [2022-11-22 01:09:58,611 INFO L226 Difference]: Without dead ends: 218 [2022-11-22 01:09:58,614 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 179 SyntacticMatches, 5 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4419 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2678, Invalid=8452, Unknown=0, NotChecked=0, Total=11130 [2022-11-22 01:09:58,615 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 138 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 521 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-22 01:09:58,615 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 7 Invalid, 575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 521 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-22 01:09:58,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2022-11-22 01:09:58,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 205. [2022-11-22 01:09:58,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 203 states have (on average 1.206896551724138) internal successors, (245), 204 states have internal predecessors, (245), 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) [2022-11-22 01:09:58,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 245 transitions. [2022-11-22 01:09:58,621 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 245 transitions. Word has length 71 [2022-11-22 01:09:58,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:09:58,622 INFO L495 AbstractCegarLoop]: Abstraction has 205 states and 245 transitions. [2022-11-22 01:09:58,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 3.358974358974359) internal successors, (131), 38 states have internal predecessors, (131), 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) [2022-11-22 01:09:58,622 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 245 transitions. [2022-11-22 01:09:58,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-22 01:09:58,623 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:09:58,623 INFO L195 NwaCegarLoop]: trace histogram [20, 19, 19, 5, 4, 4, 1, 1] [2022-11-22 01:09:58,630 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-22 01:09:58,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-11-22 01:09:58,831 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-22 01:09:58,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:09:58,831 INFO L85 PathProgramCache]: Analyzing trace with hash -2079239232, now seen corresponding path program 3 times [2022-11-22 01:09:58,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:09:58,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75158327] [2022-11-22 01:09:58,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:09:58,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:09:58,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:09:59,176 INFO L134 CoverageAnalysis]: Checked inductivity of 653 backedges. 366 proven. 191 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2022-11-22 01:09:59,176 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:09:59,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75158327] [2022-11-22 01:09:59,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75158327] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:09:59,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467414271] [2022-11-22 01:09:59,177 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-22 01:09:59,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:09:59,178 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:09:59,179 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:09:59,208 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-22 01:09:59,345 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-22 01:09:59,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:09:59,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-22 01:09:59,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:09:59,515 INFO L134 CoverageAnalysis]: Checked inductivity of 653 backedges. 403 proven. 154 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2022-11-22 01:09:59,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:09:59,686 INFO L134 CoverageAnalysis]: Checked inductivity of 653 backedges. 403 proven. 154 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2022-11-22 01:09:59,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467414271] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:09:59,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1400816098] [2022-11-22 01:09:59,688 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-22 01:09:59,688 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:09:59,688 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:09:59,688 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:09:59,688 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:09:59,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:09:59,699 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-11-22 01:09:59,725 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 15 treesize of output 14 [2022-11-22 01:09:59,830 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 235 treesize of output 237 [2022-11-22 01:09:59,891 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 15 treesize of output 14 [2022-11-22 01:09:59,913 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 01:09:59,997 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 [2022-11-22 01:10:00,048 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 15 treesize of output 14 [2022-11-22 01:10:00,078 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 15 treesize of output 14 [2022-11-22 01:10:00,099 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 01:10:00,122 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 [2022-11-22 01:10:00,173 INFO L321 Elim1Store]: treesize reduction 18, result has 33.3 percent of original size [2022-11-22 01:10:00,174 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 111 treesize of output 117 [2022-11-22 01:10:00,226 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 15 treesize of output 14 [2022-11-22 01:10:00,244 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 01:10:00,263 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 [2022-11-22 01:10:00,317 INFO L321 Elim1Store]: treesize reduction 18, result has 33.3 percent of original size [2022-11-22 01:10:00,317 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 111 treesize of output 117 [2022-11-22 01:10:00,372 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 15 treesize of output 14 [2022-11-22 01:10:00,381 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:10:00,801 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6364#(and (<= |ULTIMATE.start_foo_#in~b#1.offset| 0) (= |ULTIMATE.start_main_~#mask~0#1.offset| 0) (<= 0 |ULTIMATE.start_foo_~b#1.offset|) (not (< (mod |ULTIMATE.start_foo_~i~0#1| 4294967296) 33)) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_foo_#in~b#1.base|) (<= 0 |ULTIMATE.start_foo_~b#1.base|) (<= 0 |ULTIMATE.start_foo_#in~b#1.offset|) (<= |ULTIMATE.start_foo_~i~0#1| (+ |ULTIMATE.start_foo_~size#1| 1)) (<= 0 |ULTIMATE.start_foo_#in~size#1|) (<= 0 |ULTIMATE.start_main_~#mask~0#1.base|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_foo_~b#1.offset| 0) (<= 0 |ULTIMATE.start_foo_~i~0#1|) (= |#NULL.base| 0))' at error location [2022-11-22 01:10:00,802 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:10:00,802 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:10:00,802 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-11-22 01:10:00,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436518457] [2022-11-22 01:10:00,803 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 01:10:00,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-22 01:10:00,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:10:00,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-22 01:10:00,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=607, Unknown=0, NotChecked=0, Total=756 [2022-11-22 01:10:00,804 INFO L87 Difference]: Start difference. First operand 205 states and 245 transitions. Second operand has 22 states, 22 states have (on average 3.3636363636363638) internal successors, (74), 21 states have internal predecessors, (74), 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) [2022-11-22 01:10:01,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:10:01,207 INFO L93 Difference]: Finished difference Result 205 states and 239 transitions. [2022-11-22 01:10:01,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-22 01:10:01,208 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.3636363636363638) internal successors, (74), 21 states have internal predecessors, (74), 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 73 [2022-11-22 01:10:01,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:10:01,209 INFO L225 Difference]: With dead ends: 205 [2022-11-22 01:10:01,209 INFO L226 Difference]: Without dead ends: 205 [2022-11-22 01:10:01,210 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 197 SyntacticMatches, 4 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=348, Invalid=1374, Unknown=0, NotChecked=0, Total=1722 [2022-11-22 01:10:01,211 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 47 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 01:10:01,211 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 0 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 01:10:01,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2022-11-22 01:10:01,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 205. [2022-11-22 01:10:01,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 203 states have (on average 1.1773399014778325) internal successors, (239), 204 states have internal predecessors, (239), 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) [2022-11-22 01:10:01,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 239 transitions. [2022-11-22 01:10:01,217 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 239 transitions. Word has length 73 [2022-11-22 01:10:01,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:10:01,218 INFO L495 AbstractCegarLoop]: Abstraction has 205 states and 239 transitions. [2022-11-22 01:10:01,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.3636363636363638) internal successors, (74), 21 states have internal predecessors, (74), 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) [2022-11-22 01:10:01,218 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 239 transitions. [2022-11-22 01:10:01,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-11-22 01:10:01,219 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:10:01,219 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 5, 4, 4, 1, 1] [2022-11-22 01:10:01,232 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-11-22 01:10:01,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-11-22 01:10:01,424 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-22 01:10:01,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:10:01,425 INFO L85 PathProgramCache]: Analyzing trace with hash -1233380992, now seen corresponding path program 4 times [2022-11-22 01:10:01,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:10:01,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212028793] [2022-11-22 01:10:01,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:10:01,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:10:01,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:10:01,788 INFO L134 CoverageAnalysis]: Checked inductivity of 716 backedges. 55 proven. 587 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-11-22 01:10:01,788 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:10:01,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212028793] [2022-11-22 01:10:01,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212028793] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:10:01,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552219971] [2022-11-22 01:10:01,789 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-22 01:10:01,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:10:01,789 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:10:01,790 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:10:01,816 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-22 01:10:01,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:10:01,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-22 01:10:01,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:10:02,196 INFO L134 CoverageAnalysis]: Checked inductivity of 716 backedges. 71 proven. 571 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-11-22 01:10:02,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:10:02,390 INFO L134 CoverageAnalysis]: Checked inductivity of 716 backedges. 71 proven. 571 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-11-22 01:10:02,391 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552219971] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:10:02,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [698909289] [2022-11-22 01:10:02,392 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-22 01:10:02,392 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:10:02,392 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:10:02,393 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:10:02,393 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:10:02,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:10:02,406 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-11-22 01:10:02,432 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 [2022-11-22 01:10:02,535 INFO L321 Elim1Store]: treesize reduction 18, result has 33.3 percent of original size [2022-11-22 01:10:02,535 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 225 treesize of output 231 [2022-11-22 01:10:02,618 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 15 treesize of output 14 [2022-11-22 01:10:02,641 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 01:10:02,701 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 [2022-11-22 01:10:02,742 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 15 treesize of output 14 [2022-11-22 01:10:02,774 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 01:10:02,811 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 15 treesize of output 14 [2022-11-22 01:10:02,867 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 121 treesize of output 123 [2022-11-22 01:10:02,919 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 15 treesize of output 14 [2022-11-22 01:10:02,957 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 01:10:02,989 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 15 treesize of output 14 [2022-11-22 01:10:03,030 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 121 treesize of output 123 [2022-11-22 01:10:03,075 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 15 treesize of output 14 [2022-11-22 01:10:03,102 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:10:03,844 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7281#(and (<= |ULTIMATE.start_foo_#in~b#1.offset| 0) (<= 0 |ULTIMATE.start_foo_~b#1.offset|) (not (< (mod |ULTIMATE.start_foo_~i~0#1| 4294967296) 33)) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_foo_#in~b#1.base|) (<= 0 |ULTIMATE.start_foo_~b#1.base|) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_foo_#in~b#1.offset|) (<= |ULTIMATE.start_main_~#mask~0#1.offset| 0) (<= |ULTIMATE.start_foo_~i~0#1| (+ |ULTIMATE.start_foo_~size#1| 1)) (<= 0 |ULTIMATE.start_foo_#in~size#1|) (<= 0 |ULTIMATE.start_main_~#mask~0#1.base|) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#mask~0#1.offset|) (<= |ULTIMATE.start_foo_~b#1.offset| 0) (<= 0 |ULTIMATE.start_foo_~i~0#1|) (= |#NULL.base| 0))' at error location [2022-11-22 01:10:03,844 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:10:03,844 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:10:03,844 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 22 [2022-11-22 01:10:03,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065142751] [2022-11-22 01:10:03,845 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 01:10:03,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-22 01:10:03,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:10:03,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-22 01:10:03,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=652, Unknown=0, NotChecked=0, Total=812 [2022-11-22 01:10:03,846 INFO L87 Difference]: Start difference. First operand 205 states and 239 transitions. Second operand has 23 states, 23 states have (on average 3.347826086956522) internal successors, (77), 22 states have internal predecessors, (77), 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) [2022-11-22 01:10:04,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:10:04,486 INFO L93 Difference]: Finished difference Result 204 states and 236 transitions. [2022-11-22 01:10:04,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-22 01:10:04,486 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.347826086956522) internal successors, (77), 22 states have internal predecessors, (77), 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 76 [2022-11-22 01:10:04,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:10:04,488 INFO L225 Difference]: With dead ends: 204 [2022-11-22 01:10:04,488 INFO L226 Difference]: Without dead ends: 204 [2022-11-22 01:10:04,488 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 201 SyntacticMatches, 11 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1061 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=714, Invalid=2708, Unknown=0, NotChecked=0, Total=3422 [2022-11-22 01:10:04,489 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 103 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 01:10:04,489 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 9 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 01:10:04,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2022-11-22 01:10:04,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 202. [2022-11-22 01:10:04,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 200 states have (on average 1.17) internal successors, (234), 201 states have internal predecessors, (234), 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) [2022-11-22 01:10:04,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 234 transitions. [2022-11-22 01:10:04,494 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 234 transitions. Word has length 76 [2022-11-22 01:10:04,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:10:04,495 INFO L495 AbstractCegarLoop]: Abstraction has 202 states and 234 transitions. [2022-11-22 01:10:04,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.347826086956522) internal successors, (77), 22 states have internal predecessors, (77), 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) [2022-11-22 01:10:04,495 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 234 transitions. [2022-11-22 01:10:04,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-22 01:10:04,496 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:10:04,496 INFO L195 NwaCegarLoop]: trace histogram [26, 25, 25, 6, 5, 5, 1, 1] [2022-11-22 01:10:04,502 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-22 01:10:04,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:10:04,700 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-22 01:10:04,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:10:04,701 INFO L85 PathProgramCache]: Analyzing trace with hash 986802924, now seen corresponding path program 5 times [2022-11-22 01:10:04,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:10:04,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721160551] [2022-11-22 01:10:04,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:10:04,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:10:04,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:10:05,184 INFO L134 CoverageAnalysis]: Checked inductivity of 1115 backedges. 640 proven. 344 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2022-11-22 01:10:05,184 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:10:05,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721160551] [2022-11-22 01:10:05,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721160551] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:10:05,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432421373] [2022-11-22 01:10:05,185 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 01:10:05,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:10:05,185 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:10:05,186 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:10:05,226 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-22 01:10:05,313 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-22 01:10:05,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:10:05,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-22 01:10:05,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:10:05,331 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-22 01:10:05,332 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-11-22 01:10:05,658 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 11 treesize of output 7 [2022-11-22 01:10:05,680 INFO L134 CoverageAnalysis]: Checked inductivity of 1115 backedges. 0 proven. 427 refuted. 0 times theorem prover too weak. 688 trivial. 0 not checked. [2022-11-22 01:10:05,680 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:10:06,239 INFO L134 CoverageAnalysis]: Checked inductivity of 1115 backedges. 0 proven. 427 refuted. 0 times theorem prover too weak. 688 trivial. 0 not checked. [2022-11-22 01:10:06,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1432421373] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:10:06,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [875098940] [2022-11-22 01:10:06,240 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-22 01:10:06,241 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:10:06,241 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:10:06,241 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:10:06,241 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:10:06,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:10:06,256 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-11-22 01:10:06,295 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 [2022-11-22 01:10:06,373 INFO L321 Elim1Store]: treesize reduction 18, result has 33.3 percent of original size [2022-11-22 01:10:06,374 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 225 treesize of output 231 [2022-11-22 01:10:06,444 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 15 treesize of output 14 [2022-11-22 01:10:06,463 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 01:10:06,509 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 [2022-11-22 01:10:06,562 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 15 treesize of output 14 [2022-11-22 01:10:06,592 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 01:10:06,631 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 15 treesize of output 14 [2022-11-22 01:10:06,674 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 121 treesize of output 123 [2022-11-22 01:10:06,723 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 14 [2022-11-22 01:10:06,755 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 01:10:06,782 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 15 treesize of output 14 [2022-11-22 01:10:06,834 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 121 treesize of output 123 [2022-11-22 01:10:06,880 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 15 treesize of output 14 [2022-11-22 01:10:06,906 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:10:07,616 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8330#(and (<= |ULTIMATE.start_foo_#in~b#1.offset| 0) (<= 0 |ULTIMATE.start_foo_~b#1.offset|) (not (< (mod |ULTIMATE.start_foo_~i~0#1| 4294967296) 33)) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_foo_#in~b#1.base|) (<= 0 |ULTIMATE.start_foo_~b#1.base|) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_foo_#in~b#1.offset|) (<= |ULTIMATE.start_main_~#mask~0#1.offset| 0) (<= |ULTIMATE.start_foo_~i~0#1| (+ |ULTIMATE.start_foo_~size#1| 1)) (<= 0 |ULTIMATE.start_foo_#in~size#1|) (<= 0 |ULTIMATE.start_main_~#mask~0#1.base|) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#mask~0#1.offset|) (<= |ULTIMATE.start_foo_~b#1.offset| 0) (<= 0 |ULTIMATE.start_foo_~i~0#1|) (= |#NULL.base| 0))' at error location [2022-11-22 01:10:07,617 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:10:07,617 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:10:07,617 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 3, 3] total 18 [2022-11-22 01:10:07,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064482495] [2022-11-22 01:10:07,617 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 01:10:07,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-22 01:10:07,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:10:07,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-22 01:10:07,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2022-11-22 01:10:07,619 INFO L87 Difference]: Start difference. First operand 202 states and 234 transitions. Second operand has 19 states, 19 states have (on average 4.0) internal successors, (76), 18 states have internal predecessors, (76), 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) [2022-11-22 01:10:08,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:10:08,509 INFO L93 Difference]: Finished difference Result 201 states and 215 transitions. [2022-11-22 01:10:08,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-22 01:10:08,510 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.0) internal successors, (76), 18 states have internal predecessors, (76), 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 94 [2022-11-22 01:10:08,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:10:08,511 INFO L225 Difference]: With dead ends: 201 [2022-11-22 01:10:08,511 INFO L226 Difference]: Without dead ends: 201 [2022-11-22 01:10:08,512 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 269 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 537 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=548, Invalid=2002, Unknown=0, NotChecked=0, Total=2550 [2022-11-22 01:10:08,513 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 67 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 01:10:08,513 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 0 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 01:10:08,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2022-11-22 01:10:08,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 201. [2022-11-22 01:10:08,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 1.075) internal successors, (215), 200 states have internal predecessors, (215), 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) [2022-11-22 01:10:08,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 215 transitions. [2022-11-22 01:10:08,518 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 215 transitions. Word has length 94 [2022-11-22 01:10:08,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:10:08,519 INFO L495 AbstractCegarLoop]: Abstraction has 201 states and 215 transitions. [2022-11-22 01:10:08,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.0) internal successors, (76), 18 states have internal predecessors, (76), 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) [2022-11-22 01:10:08,519 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 215 transitions. [2022-11-22 01:10:08,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2022-11-22 01:10:08,521 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:10:08,521 INFO L195 NwaCegarLoop]: trace histogram [49, 49, 48, 9, 8, 8, 1, 1] [2022-11-22 01:10:08,532 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-22 01:10:08,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:10:08,728 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-22 01:10:08,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:10:08,728 INFO L85 PathProgramCache]: Analyzing trace with hash -1669795914, now seen corresponding path program 4 times [2022-11-22 01:10:08,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:10:08,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865300886] [2022-11-22 01:10:08,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:10:08,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:10:08,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:10:09,637 INFO L134 CoverageAnalysis]: Checked inductivity of 4012 backedges. 2470 proven. 195 refuted. 0 times theorem prover too weak. 1347 trivial. 0 not checked. [2022-11-22 01:10:09,637 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:10:09,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865300886] [2022-11-22 01:10:09,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865300886] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:10:09,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239284527] [2022-11-22 01:10:09,638 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-22 01:10:09,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:10:09,638 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:10:09,639 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:10:09,668 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-22 01:10:09,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:10:09,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 838 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-22 01:10:09,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:10:10,216 INFO L134 CoverageAnalysis]: Checked inductivity of 4012 backedges. 2609 proven. 466 refuted. 0 times theorem prover too weak. 937 trivial. 0 not checked. [2022-11-22 01:10:10,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:10:10,537 INFO L134 CoverageAnalysis]: Checked inductivity of 4012 backedges. 2609 proven. 466 refuted. 0 times theorem prover too weak. 937 trivial. 0 not checked. [2022-11-22 01:10:10,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [239284527] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:10:10,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [181083672] [2022-11-22 01:10:10,539 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-22 01:10:10,539 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:10:10,539 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:10:10,539 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:10:10,539 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:10:10,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:10:10,553 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-11-22 01:10:10,579 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 15 treesize of output 14 [2022-11-22 01:10:10,669 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 235 treesize of output 237 [2022-11-22 01:10:10,745 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 15 treesize of output 14 [2022-11-22 01:10:10,765 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 01:10:10,822 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 [2022-11-22 01:10:10,862 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 15 treesize of output 14 [2022-11-22 01:10:10,890 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 15 treesize of output 14 [2022-11-22 01:10:10,912 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 01:10:10,940 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 15 treesize of output 14 [2022-11-22 01:10:10,990 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 121 treesize of output 123 [2022-11-22 01:10:11,043 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 15 treesize of output 14 [2022-11-22 01:10:11,071 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 01:10:11,090 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 15 treesize of output 14 [2022-11-22 01:10:11,133 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 121 treesize of output 123 [2022-11-22 01:10:11,182 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 15 treesize of output 14 [2022-11-22 01:10:11,203 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:10:12,024 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9858#(and (<= |ULTIMATE.start_foo_#in~b#1.offset| 0) (not (<= (+ |ULTIMATE.start_foo_~i~0#1| |ULTIMATE.start_foo_~b#1.offset| 1) (select |#length| |ULTIMATE.start_foo_~b#1.base|))) (<= 0 |ULTIMATE.start_foo_~b#1.offset|) (< (mod |ULTIMATE.start_foo_~i~0#1| 4294967296) 33) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_foo_#in~b#1.base|) (<= 0 |ULTIMATE.start_foo_~b#1.base|) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_foo_#in~b#1.offset|) (<= 0 |ULTIMATE.start_foo_~size#1|) (<= |ULTIMATE.start_main_~#mask~0#1.offset| 0) (<= |ULTIMATE.start_foo_~i~0#1| (+ |ULTIMATE.start_foo_~size#1| 1)) (<= 0 |ULTIMATE.start_foo_#in~size#1|) (<= 0 |ULTIMATE.start_main_~#mask~0#1.base|) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#mask~0#1.offset|) (<= |ULTIMATE.start_foo_~b#1.offset| 0) (<= 0 |ULTIMATE.start_foo_~i~0#1|) (= |#NULL.base| 0))' at error location [2022-11-22 01:10:12,024 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:10:12,024 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:10:12,025 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14, 14] total 36 [2022-11-22 01:10:12,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115748412] [2022-11-22 01:10:12,025 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 01:10:12,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-22 01:10:12,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:10:12,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-22 01:10:12,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=266, Invalid=1456, Unknown=0, NotChecked=0, Total=1722 [2022-11-22 01:10:12,028 INFO L87 Difference]: Start difference. First operand 201 states and 215 transitions. Second operand has 36 states, 36 states have (on average 3.4722222222222223) internal successors, (125), 36 states have internal predecessors, (125), 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) [2022-11-22 01:10:13,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:10:13,309 INFO L93 Difference]: Finished difference Result 201 states and 211 transitions. [2022-11-22 01:10:13,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-11-22 01:10:13,310 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 3.4722222222222223) internal successors, (125), 36 states have internal predecessors, (125), 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 173 [2022-11-22 01:10:13,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:10:13,311 INFO L225 Difference]: With dead ends: 201 [2022-11-22 01:10:13,311 INFO L226 Difference]: Without dead ends: 201 [2022-11-22 01:10:13,313 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 569 GetRequests, 490 SyntacticMatches, 6 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1472 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=932, Invalid=4618, Unknown=0, NotChecked=0, Total=5550 [2022-11-22 01:10:13,314 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 65 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1012 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1028 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1012 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-22 01:10:13,314 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 0 Invalid, 1028 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1012 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-22 01:10:13,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2022-11-22 01:10:13,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 201. [2022-11-22 01:10:13,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 1.055) internal successors, (211), 200 states have internal predecessors, (211), 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) [2022-11-22 01:10:13,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 211 transitions. [2022-11-22 01:10:13,319 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 211 transitions. Word has length 173 [2022-11-22 01:10:13,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:10:13,320 INFO L495 AbstractCegarLoop]: Abstraction has 201 states and 211 transitions. [2022-11-22 01:10:13,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 3.4722222222222223) internal successors, (125), 36 states have internal predecessors, (125), 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) [2022-11-22 01:10:13,320 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 211 transitions. [2022-11-22 01:10:13,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-11-22 01:10:13,322 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:10:13,322 INFO L195 NwaCegarLoop]: trace histogram [52, 52, 51, 9, 8, 8, 1, 1] [2022-11-22 01:10:13,329 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-11-22 01:10:13,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-22 01:10:13,529 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-22 01:10:13,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:10:13,529 INFO L85 PathProgramCache]: Analyzing trace with hash 224288030, now seen corresponding path program 5 times [2022-11-22 01:10:13,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:10:13,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053715747] [2022-11-22 01:10:13,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:10:13,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:10:13,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:10:14,529 INFO L134 CoverageAnalysis]: Checked inductivity of 4486 backedges. 2794 proven. 261 refuted. 0 times theorem prover too weak. 1431 trivial. 0 not checked. [2022-11-22 01:10:14,529 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:10:14,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053715747] [2022-11-22 01:10:14,529 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053715747] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:10:14,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988178790] [2022-11-22 01:10:14,530 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 01:10:14,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:10:14,530 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:10:14,531 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:10:14,539 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-22 01:10:14,911 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-11-22 01:10:14,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:10:14,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-22 01:10:14,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:10:15,563 INFO L134 CoverageAnalysis]: Checked inductivity of 4486 backedges. 2197 proven. 298 refuted. 0 times theorem prover too weak. 1991 trivial. 0 not checked. [2022-11-22 01:10:15,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:10:16,407 INFO L134 CoverageAnalysis]: Checked inductivity of 4486 backedges. 2197 proven. 298 refuted. 0 times theorem prover too weak. 1991 trivial. 0 not checked. [2022-11-22 01:10:16,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1988178790] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:10:16,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1823942106] [2022-11-22 01:10:16,409 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-22 01:10:16,409 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:10:16,409 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:10:16,410 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:10:16,410 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:10:16,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:10:16,422 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-11-22 01:10:16,449 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 15 treesize of output 14 [2022-11-22 01:10:16,545 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 235 treesize of output 237 [2022-11-22 01:10:16,608 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 15 treesize of output 14 [2022-11-22 01:10:16,629 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 01:10:16,694 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 [2022-11-22 01:10:16,745 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 15 treesize of output 14 [2022-11-22 01:10:16,773 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 15 treesize of output 14 [2022-11-22 01:10:16,805 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 01:10:16,837 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 15 treesize of output 14 [2022-11-22 01:10:16,878 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 121 treesize of output 123 [2022-11-22 01:10:16,936 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 15 treesize of output 14 [2022-11-22 01:10:16,966 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 01:10:16,988 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 15 treesize of output 14 [2022-11-22 01:10:17,032 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 121 treesize of output 123 [2022-11-22 01:10:17,082 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 15 treesize of output 14 [2022-11-22 01:10:17,102 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:10:18,070 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11481#(and (<= |ULTIMATE.start_foo_#in~b#1.offset| 0) (not (<= (+ |ULTIMATE.start_foo_~i~0#1| |ULTIMATE.start_foo_~b#1.offset| 1) (select |#length| |ULTIMATE.start_foo_~b#1.base|))) (<= 0 |ULTIMATE.start_foo_~b#1.offset|) (< (mod |ULTIMATE.start_foo_~i~0#1| 4294967296) 33) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_foo_#in~b#1.base|) (<= 0 |ULTIMATE.start_foo_~b#1.base|) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_foo_#in~b#1.offset|) (<= 0 |ULTIMATE.start_foo_~size#1|) (<= |ULTIMATE.start_main_~#mask~0#1.offset| 0) (<= |ULTIMATE.start_foo_~i~0#1| (+ |ULTIMATE.start_foo_~size#1| 1)) (<= 0 |ULTIMATE.start_foo_#in~size#1|) (<= 0 |ULTIMATE.start_main_~#mask~0#1.base|) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#mask~0#1.offset|) (<= |ULTIMATE.start_foo_~b#1.offset| 0) (<= 0 |ULTIMATE.start_foo_~i~0#1|) (= |#NULL.base| 0))' at error location [2022-11-22 01:10:18,070 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:10:18,070 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:10:18,070 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 23, 23] total 62 [2022-11-22 01:10:18,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797020761] [2022-11-22 01:10:18,071 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 01:10:18,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-11-22 01:10:18,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:10:18,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-11-22 01:10:18,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=598, Invalid=3958, Unknown=0, NotChecked=0, Total=4556 [2022-11-22 01:10:18,075 INFO L87 Difference]: Start difference. First operand 201 states and 211 transitions. Second operand has 62 states, 62 states have (on average 2.774193548387097) internal successors, (172), 62 states have internal predecessors, (172), 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) [2022-11-22 01:10:21,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:10:21,230 INFO L93 Difference]: Finished difference Result 226 states and 232 transitions. [2022-11-22 01:10:21,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-11-22 01:10:21,230 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.774193548387097) internal successors, (172), 62 states have internal predecessors, (172), 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 182 [2022-11-22 01:10:21,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:10:21,232 INFO L225 Difference]: With dead ends: 226 [2022-11-22 01:10:21,232 INFO L226 Difference]: Without dead ends: 226 [2022-11-22 01:10:21,235 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 640 GetRequests, 499 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5718 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=3080, Invalid=17226, Unknown=0, NotChecked=0, Total=20306 [2022-11-22 01:10:21,236 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 811 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 937 mSolverCounterSat, 200 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 811 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 200 IncrementalHoareTripleChecker+Valid, 937 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-22 01:10:21,236 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [811 Valid, 0 Invalid, 1137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [200 Valid, 937 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-22 01:10:21,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2022-11-22 01:10:21,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 225. [2022-11-22 01:10:21,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 1.03125) internal successors, (231), 224 states have internal predecessors, (231), 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) [2022-11-22 01:10:21,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 231 transitions. [2022-11-22 01:10:21,241 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 231 transitions. Word has length 182 [2022-11-22 01:10:21,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:10:21,242 INFO L495 AbstractCegarLoop]: Abstraction has 225 states and 231 transitions. [2022-11-22 01:10:21,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.774193548387097) internal successors, (172), 62 states have internal predecessors, (172), 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) [2022-11-22 01:10:21,242 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 231 transitions. [2022-11-22 01:10:21,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2022-11-22 01:10:21,245 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:10:21,245 INFO L195 NwaCegarLoop]: trace histogram [64, 64, 63, 10, 9, 9, 1, 1] [2022-11-22 01:10:21,256 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-22 01:10:21,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-22 01:10:21,452 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-22 01:10:21,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:10:21,452 INFO L85 PathProgramCache]: Analyzing trace with hash 1290336034, now seen corresponding path program 6 times [2022-11-22 01:10:21,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:10:21,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092321671] [2022-11-22 01:10:21,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:10:21,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:10:21,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:10:22,421 INFO L134 CoverageAnalysis]: Checked inductivity of 6741 backedges. 4614 proven. 1187 refuted. 0 times theorem prover too weak. 940 trivial. 0 not checked. [2022-11-22 01:10:22,421 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:10:22,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092321671] [2022-11-22 01:10:22,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092321671] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:10:22,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793487300] [2022-11-22 01:10:22,422 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-22 01:10:22,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:10:22,422 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:10:22,424 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:10:22,452 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-22 01:10:22,997 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-22 01:10:22,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:10:23,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 1035 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-22 01:10:23,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:10:23,442 INFO L134 CoverageAnalysis]: Checked inductivity of 6741 backedges. 4771 proven. 1030 refuted. 0 times theorem prover too weak. 940 trivial. 0 not checked. [2022-11-22 01:10:23,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:10:23,943 INFO L134 CoverageAnalysis]: Checked inductivity of 6741 backedges. 4771 proven. 1030 refuted. 0 times theorem prover too weak. 940 trivial. 0 not checked. [2022-11-22 01:10:23,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1793487300] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:10:23,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1478064807] [2022-11-22 01:10:23,944 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-22 01:10:23,944 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:10:23,945 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:10:23,945 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:10:23,945 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:10:23,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:10:23,956 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-11-22 01:10:23,984 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 [2022-11-22 01:10:24,066 INFO L321 Elim1Store]: treesize reduction 18, result has 33.3 percent of original size [2022-11-22 01:10:24,067 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 225 treesize of output 231 [2022-11-22 01:10:24,148 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 15 treesize of output 14 [2022-11-22 01:10:24,167 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 01:10:24,257 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 15 treesize of output 14 [2022-11-22 01:10:24,297 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 15 treesize of output 14 [2022-11-22 01:10:24,332 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 15 treesize of output 14 [2022-11-22 01:10:24,352 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 01:10:24,381 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 15 treesize of output 14 [2022-11-22 01:10:24,438 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 121 treesize of output 123 [2022-11-22 01:10:24,517 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 15 treesize of output 14 [2022-11-22 01:10:24,551 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 01:10:24,572 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 15 treesize of output 14 [2022-11-22 01:10:24,617 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 121 treesize of output 123 [2022-11-22 01:10:24,669 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 15 treesize of output 14 [2022-11-22 01:10:24,693 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:10:25,461 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '13447#(and (<= |ULTIMATE.start_foo_#in~b#1.offset| 0) (not (<= (+ |ULTIMATE.start_foo_~i~0#1| |ULTIMATE.start_foo_~b#1.offset| 1) (select |#length| |ULTIMATE.start_foo_~b#1.base|))) (<= 0 |ULTIMATE.start_foo_~b#1.offset|) (< (mod |ULTIMATE.start_foo_~i~0#1| 4294967296) 33) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_foo_#in~b#1.base|) (<= 0 |ULTIMATE.start_foo_~b#1.base|) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_foo_#in~b#1.offset|) (<= 0 |ULTIMATE.start_foo_~size#1|) (<= |ULTIMATE.start_main_~#mask~0#1.offset| 0) (<= |ULTIMATE.start_foo_~i~0#1| (+ |ULTIMATE.start_foo_~size#1| 1)) (<= 0 |ULTIMATE.start_foo_#in~size#1|) (<= 0 |ULTIMATE.start_main_~#mask~0#1.base|) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#mask~0#1.offset|) (<= |ULTIMATE.start_foo_~b#1.offset| 0) (<= 0 |ULTIMATE.start_foo_~i~0#1|) (= |#NULL.base| 0))' at error location [2022-11-22 01:10:25,461 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:10:25,461 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:10:25,461 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 37 [2022-11-22 01:10:25,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656455768] [2022-11-22 01:10:25,462 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 01:10:25,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-22 01:10:25,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:10:25,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-22 01:10:25,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=350, Invalid=1542, Unknown=0, NotChecked=0, Total=1892 [2022-11-22 01:10:25,463 INFO L87 Difference]: Start difference. First operand 225 states and 231 transitions. Second operand has 38 states, 38 states have (on average 3.5526315789473686) internal successors, (135), 37 states have internal predecessors, (135), 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) [2022-11-22 01:10:26,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:10:26,813 INFO L93 Difference]: Finished difference Result 225 states and 228 transitions. [2022-11-22 01:10:26,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-11-22 01:10:26,814 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.5526315789473686) internal successors, (135), 37 states have internal predecessors, (135), 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 221 [2022-11-22 01:10:26,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:10:26,815 INFO L225 Difference]: With dead ends: 225 [2022-11-22 01:10:26,816 INFO L226 Difference]: Without dead ends: 225 [2022-11-22 01:10:26,816 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 723 GetRequests, 629 SyntacticMatches, 8 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1987 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1695, Invalid=5961, Unknown=0, NotChecked=0, Total=7656 [2022-11-22 01:10:26,817 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 74 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 612 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 612 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-22 01:10:26,817 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 0 Invalid, 632 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 612 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-22 01:10:26,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2022-11-22 01:10:26,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 225. [2022-11-22 01:10:26,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 1.0178571428571428) internal successors, (228), 224 states have internal predecessors, (228), 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) [2022-11-22 01:10:26,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 228 transitions. [2022-11-22 01:10:26,823 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 228 transitions. Word has length 221 [2022-11-22 01:10:26,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:10:26,823 INFO L495 AbstractCegarLoop]: Abstraction has 225 states and 228 transitions. [2022-11-22 01:10:26,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 3.5526315789473686) internal successors, (135), 37 states have internal predecessors, (135), 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) [2022-11-22 01:10:26,824 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 228 transitions. [2022-11-22 01:10:26,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2022-11-22 01:10:26,826 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:10:26,826 INFO L195 NwaCegarLoop]: trace histogram [65, 65, 64, 10, 9, 9, 1, 1] [2022-11-22 01:10:26,835 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-22 01:10:27,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-11-22 01:10:27,035 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-22 01:10:27,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:10:27,036 INFO L85 PathProgramCache]: Analyzing trace with hash 1167072994, now seen corresponding path program 7 times [2022-11-22 01:10:27,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:10:27,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012464432] [2022-11-22 01:10:27,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:10:27,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:10:27,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:10:28,519 INFO L134 CoverageAnalysis]: Checked inductivity of 6942 backedges. 0 proven. 2046 refuted. 0 times theorem prover too weak. 4896 trivial. 0 not checked. [2022-11-22 01:10:28,520 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:10:28,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012464432] [2022-11-22 01:10:28,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012464432] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:10:28,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742626979] [2022-11-22 01:10:28,520 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-22 01:10:28,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:10:28,521 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:10:28,524 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:10:28,548 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-22 01:10:28,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:10:28,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 1046 conjuncts, 39 conjunts are in the unsatisfiable core [2022-11-22 01:10:28,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:10:28,865 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-22 01:10:28,865 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-11-22 01:10:30,038 INFO L134 CoverageAnalysis]: Checked inductivity of 6942 backedges. 0 proven. 2046 refuted. 0 times theorem prover too weak. 4896 trivial. 0 not checked. [2022-11-22 01:10:30,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:10:31,361 INFO L134 CoverageAnalysis]: Checked inductivity of 6942 backedges. 0 proven. 2046 refuted. 0 times theorem prover too weak. 4896 trivial. 0 not checked. [2022-11-22 01:10:31,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [742626979] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:10:31,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1079355763] [2022-11-22 01:10:31,363 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-22 01:10:31,363 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:10:31,363 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:10:31,364 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:10:31,364 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:10:31,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:10:31,375 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-11-22 01:10:31,401 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 15 treesize of output 14 [2022-11-22 01:10:31,498 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 235 treesize of output 237 [2022-11-22 01:10:31,558 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 15 treesize of output 14 [2022-11-22 01:10:31,575 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 01:10:31,656 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 15 treesize of output 14 [2022-11-22 01:10:31,694 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 15 treesize of output 14 [2022-11-22 01:10:31,723 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 01:10:31,750 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 [2022-11-22 01:10:31,798 INFO L321 Elim1Store]: treesize reduction 18, result has 33.3 percent of original size [2022-11-22 01:10:31,798 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 111 treesize of output 117 [2022-11-22 01:10:31,839 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 15 treesize of output 14 [2022-11-22 01:10:31,856 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 01:10:31,872 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 [2022-11-22 01:10:31,929 INFO L321 Elim1Store]: treesize reduction 18, result has 33.3 percent of original size [2022-11-22 01:10:31,930 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 111 treesize of output 117 [2022-11-22 01:10:31,978 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 15 treesize of output 14 [2022-11-22 01:10:31,991 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:10:32,552 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '15365#(and (<= |ULTIMATE.start_foo_#in~b#1.offset| 0) (not (<= (+ |ULTIMATE.start_foo_~i~0#1| |ULTIMATE.start_foo_~b#1.offset| 1) (select |#length| |ULTIMATE.start_foo_~b#1.base|))) (= |ULTIMATE.start_main_~#mask~0#1.offset| 0) (<= 0 |ULTIMATE.start_foo_~b#1.offset|) (< (mod |ULTIMATE.start_foo_~i~0#1| 4294967296) 33) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_foo_#in~b#1.base|) (<= 0 |ULTIMATE.start_foo_~b#1.base|) (<= 0 |ULTIMATE.start_foo_#in~b#1.offset|) (<= 0 |ULTIMATE.start_foo_~size#1|) (<= |ULTIMATE.start_foo_~i~0#1| (+ |ULTIMATE.start_foo_~size#1| 1)) (<= 0 |ULTIMATE.start_foo_#in~size#1|) (<= 0 |ULTIMATE.start_main_~#mask~0#1.base|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_foo_~b#1.offset| 0) (<= 0 |ULTIMATE.start_foo_~i~0#1|) (= |#NULL.base| 0))' at error location [2022-11-22 01:10:32,552 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:10:32,552 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:10:32,553 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 34 [2022-11-22 01:10:32,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118137023] [2022-11-22 01:10:32,553 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 01:10:32,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-22 01:10:32,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:10:32,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-22 01:10:32,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=335, Invalid=1387, Unknown=0, NotChecked=0, Total=1722 [2022-11-22 01:10:32,554 INFO L87 Difference]: Start difference. First operand 225 states and 228 transitions. Second operand has 36 states, 35 states have (on average 3.2285714285714286) internal successors, (113), 35 states have internal predecessors, (113), 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) [2022-11-22 01:10:34,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:10:34,042 INFO L93 Difference]: Finished difference Result 285 states and 300 transitions. [2022-11-22 01:10:34,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-22 01:10:34,043 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 3.2285714285714286) internal successors, (113), 35 states have internal predecessors, (113), 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 224 [2022-11-22 01:10:34,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:10:34,044 INFO L225 Difference]: With dead ends: 285 [2022-11-22 01:10:34,044 INFO L226 Difference]: Without dead ends: 285 [2022-11-22 01:10:34,045 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 704 GetRequests, 642 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 952 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=807, Invalid=3225, Unknown=0, NotChecked=0, Total=4032 [2022-11-22 01:10:34,045 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 214 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1097 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1097 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-22 01:10:34,046 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [214 Valid, 0 Invalid, 1118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 1097 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-22 01:10:34,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2022-11-22 01:10:34,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 261. [2022-11-22 01:10:34,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 260 states have (on average 1.0615384615384615) internal successors, (276), 260 states have internal predecessors, (276), 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) [2022-11-22 01:10:34,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 276 transitions. [2022-11-22 01:10:34,052 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 276 transitions. Word has length 224 [2022-11-22 01:10:34,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:10:34,052 INFO L495 AbstractCegarLoop]: Abstraction has 261 states and 276 transitions. [2022-11-22 01:10:34,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 3.2285714285714286) internal successors, (113), 35 states have internal predecessors, (113), 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) [2022-11-22 01:10:34,053 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 276 transitions. [2022-11-22 01:10:34,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2022-11-22 01:10:34,054 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:10:34,054 INFO L195 NwaCegarLoop]: trace histogram [77, 77, 76, 10, 9, 9, 1, 1] [2022-11-22 01:10:34,064 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-11-22 01:10:34,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-22 01:10:34,262 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-22 01:10:34,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:10:34,262 INFO L85 PathProgramCache]: Analyzing trace with hash -621187358, now seen corresponding path program 8 times [2022-11-22 01:10:34,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:10:34,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988183709] [2022-11-22 01:10:34,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:10:34,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:10:34,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:10:36,230 INFO L134 CoverageAnalysis]: Checked inductivity of 9588 backedges. 803 proven. 8236 refuted. 0 times theorem prover too weak. 549 trivial. 0 not checked. [2022-11-22 01:10:36,230 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:10:36,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988183709] [2022-11-22 01:10:36,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988183709] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:10:36,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610246570] [2022-11-22 01:10:36,231 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 01:10:36,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:10:36,231 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:10:36,232 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:10:36,244 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-22 01:10:36,722 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2022-11-22 01:10:36,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:10:36,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 534 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-22 01:10:36,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:10:36,745 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-22 01:10:36,746 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-11-22 01:10:38,523 INFO L134 CoverageAnalysis]: Checked inductivity of 9588 backedges. 1491 proven. 4122 refuted. 0 times theorem prover too weak. 3975 trivial. 0 not checked. [2022-11-22 01:10:38,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:10:40,459 INFO L134 CoverageAnalysis]: Checked inductivity of 9588 backedges. 0 proven. 5613 refuted. 0 times theorem prover too weak. 3975 trivial. 0 not checked. [2022-11-22 01:10:40,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1610246570] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:10:40,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1996710840] [2022-11-22 01:10:40,460 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-22 01:10:40,461 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:10:40,461 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:10:40,461 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:10:40,461 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:10:40,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:10:40,478 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-11-22 01:10:40,504 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 15 treesize of output 14 [2022-11-22 01:10:40,598 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 235 treesize of output 237 [2022-11-22 01:10:40,657 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 15 treesize of output 14 [2022-11-22 01:10:40,701 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 01:10:40,749 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 15 treesize of output 14 [2022-11-22 01:10:40,793 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 15 treesize of output 14 [2022-11-22 01:10:40,832 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 15 treesize of output 14 [2022-11-22 01:10:40,852 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 16 treesize of output 12 [2022-11-22 01:10:40,878 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 15 treesize of output 14 [2022-11-22 01:10:40,922 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 121 treesize of output 123 [2022-11-22 01:10:40,970 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 15 treesize of output 14 [2022-11-22 01:10:40,992 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 01:10:41,017 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 15 treesize of output 14 [2022-11-22 01:10:41,058 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 121 treesize of output 123 [2022-11-22 01:10:41,114 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 15 treesize of output 14 [2022-11-22 01:10:41,135 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:10:42,073 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '17584#(and (<= |ULTIMATE.start_foo_#in~b#1.offset| 0) (not (<= (+ |ULTIMATE.start_foo_~i~0#1| |ULTIMATE.start_foo_~b#1.offset| 1) (select |#length| |ULTIMATE.start_foo_~b#1.base|))) (<= 0 |ULTIMATE.start_foo_~b#1.offset|) (< (mod |ULTIMATE.start_foo_~i~0#1| 4294967296) 33) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_foo_#in~b#1.base|) (<= 0 |ULTIMATE.start_foo_~b#1.base|) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_foo_#in~b#1.offset|) (<= 0 |ULTIMATE.start_foo_~size#1|) (<= |ULTIMATE.start_main_~#mask~0#1.offset| 0) (<= |ULTIMATE.start_foo_~i~0#1| (+ |ULTIMATE.start_foo_~size#1| 1)) (<= 0 |ULTIMATE.start_foo_#in~size#1|) (<= 0 |ULTIMATE.start_main_~#mask~0#1.base|) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#mask~0#1.offset|) (<= |ULTIMATE.start_foo_~b#1.offset| 0) (<= 0 |ULTIMATE.start_foo_~i~0#1|) (= |#NULL.base| 0))' at error location [2022-11-22 01:10:42,073 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:10:42,073 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:10:42,073 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 17, 17] total 68 [2022-11-22 01:10:42,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086223702] [2022-11-22 01:10:42,073 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 01:10:42,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-11-22 01:10:42,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:10:42,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-11-22 01:10:42,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=770, Invalid=4780, Unknown=0, NotChecked=0, Total=5550 [2022-11-22 01:10:42,075 INFO L87 Difference]: Start difference. First operand 261 states and 276 transitions. Second operand has 69 states, 69 states have (on average 3.2028985507246377) internal successors, (221), 68 states have internal predecessors, (221), 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) [2022-11-22 01:10:58,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:10:58,232 INFO L93 Difference]: Finished difference Result 451 states and 496 transitions. [2022-11-22 01:10:58,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2022-11-22 01:10:58,232 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 3.2028985507246377) internal successors, (221), 68 states have internal predecessors, (221), 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 260 [2022-11-22 01:10:58,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:10:58,234 INFO L225 Difference]: With dead ends: 451 [2022-11-22 01:10:58,234 INFO L226 Difference]: Without dead ends: 451 [2022-11-22 01:10:58,241 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 990 GetRequests, 739 SyntacticMatches, 0 SemanticMatches, 251 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24483 ImplicationChecksByTransitivity, 17.8s TimeCoverageRelationStatistics Valid=14639, Invalid=49117, Unknown=0, NotChecked=0, Total=63756 [2022-11-22 01:10:58,242 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1400 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 493 mSolverCounterSat, 543 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1400 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1036 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 543 IncrementalHoareTripleChecker+Valid, 493 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-22 01:10:58,242 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1400 Valid, 0 Invalid, 1036 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [543 Valid, 493 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-22 01:10:58,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2022-11-22 01:10:58,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 402. [2022-11-22 01:10:58,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 1.087281795511222) internal successors, (436), 401 states have internal predecessors, (436), 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) [2022-11-22 01:10:58,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 436 transitions. [2022-11-22 01:10:58,250 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 436 transitions. Word has length 260 [2022-11-22 01:10:58,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:10:58,250 INFO L495 AbstractCegarLoop]: Abstraction has 402 states and 436 transitions. [2022-11-22 01:10:58,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 3.2028985507246377) internal successors, (221), 68 states have internal predecessors, (221), 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) [2022-11-22 01:10:58,251 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 436 transitions. [2022-11-22 01:10:58,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 402 [2022-11-22 01:10:58,253 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:10:58,254 INFO L195 NwaCegarLoop]: trace histogram [121, 121, 120, 13, 12, 12, 1, 1] [2022-11-22 01:10:58,268 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-11-22 01:10:58,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:10:58,461 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-22 01:10:58,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:10:58,461 INFO L85 PathProgramCache]: Analyzing trace with hash 1746148366, now seen corresponding path program 9 times [2022-11-22 01:10:58,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:10:58,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569105707] [2022-11-22 01:10:58,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:10:58,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:10:58,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:11:00,478 INFO L134 CoverageAnalysis]: Checked inductivity of 23442 backedges. 16905 proven. 2795 refuted. 0 times theorem prover too weak. 3742 trivial. 0 not checked. [2022-11-22 01:11:00,478 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:11:00,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569105707] [2022-11-22 01:11:00,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569105707] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:11:00,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453261242] [2022-11-22 01:11:00,479 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-22 01:11:00,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:11:00,479 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:11:00,480 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:11:00,500 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-22 01:11:02,815 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-22 01:11:02,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:11:02,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 1758 conjuncts, 37 conjunts are in the unsatisfiable core [2022-11-22 01:11:02,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:11:04,230 INFO L134 CoverageAnalysis]: Checked inductivity of 23442 backedges. 7946 proven. 13767 refuted. 0 times theorem prover too weak. 1729 trivial. 0 not checked. [2022-11-22 01:11:04,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:11:05,849 INFO L134 CoverageAnalysis]: Checked inductivity of 23442 backedges. 7946 proven. 13767 refuted. 0 times theorem prover too weak. 1729 trivial. 0 not checked. [2022-11-22 01:11:05,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453261242] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:11:05,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1182889181] [2022-11-22 01:11:05,850 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-22 01:11:05,851 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:11:05,851 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:11:05,851 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:11:05,851 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:11:05,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:11:05,869 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-11-22 01:11:05,891 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 15 treesize of output 14 [2022-11-22 01:11:05,962 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 235 treesize of output 237 [2022-11-22 01:11:06,034 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 15 treesize of output 14 [2022-11-22 01:11:06,053 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 01:11:06,116 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 15 treesize of output 14 [2022-11-22 01:11:06,157 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 15 treesize of output 14 [2022-11-22 01:11:06,182 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 01:11:06,218 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 [2022-11-22 01:11:06,270 INFO L321 Elim1Store]: treesize reduction 18, result has 33.3 percent of original size [2022-11-22 01:11:06,270 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 111 treesize of output 117 [2022-11-22 01:11:06,341 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 15 treesize of output 14 [2022-11-22 01:11:06,364 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 01:11:06,386 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 [2022-11-22 01:11:06,440 INFO L321 Elim1Store]: treesize reduction 18, result has 33.3 percent of original size [2022-11-22 01:11:06,440 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 111 treesize of output 117 [2022-11-22 01:11:06,485 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 15 treesize of output 14 [2022-11-22 01:11:06,498 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:11:07,253 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '21288#(and (<= |ULTIMATE.start_foo_#in~b#1.offset| 0) (not (<= (+ |ULTIMATE.start_foo_~i~0#1| |ULTIMATE.start_foo_~b#1.offset| 1) (select |#length| |ULTIMATE.start_foo_~b#1.base|))) (= |ULTIMATE.start_main_~#mask~0#1.offset| 0) (<= 0 |ULTIMATE.start_foo_~b#1.offset|) (< (mod |ULTIMATE.start_foo_~i~0#1| 4294967296) 33) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_foo_#in~b#1.base|) (<= 0 |ULTIMATE.start_foo_~b#1.base|) (<= 0 |ULTIMATE.start_foo_#in~b#1.offset|) (<= 0 |ULTIMATE.start_foo_~size#1|) (<= |ULTIMATE.start_foo_~i~0#1| (+ |ULTIMATE.start_foo_~size#1| 1)) (<= 0 |ULTIMATE.start_foo_#in~size#1|) (<= 0 |ULTIMATE.start_main_~#mask~0#1.base|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_foo_~b#1.offset| 0) (<= 0 |ULTIMATE.start_foo_~i~0#1|) (= |#NULL.base| 0))' at error location [2022-11-22 01:11:07,253 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:11:07,253 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:11:07,254 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 35, 35] total 88 [2022-11-22 01:11:07,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215128569] [2022-11-22 01:11:07,254 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 01:11:07,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2022-11-22 01:11:07,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:11:07,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2022-11-22 01:11:07,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1407, Invalid=7523, Unknown=0, NotChecked=0, Total=8930 [2022-11-22 01:11:07,258 INFO L87 Difference]: Start difference. First operand 402 states and 436 transitions. Second operand has 89 states, 89 states have (on average 3.9213483146067416) internal successors, (349), 88 states have internal predecessors, (349), 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) [2022-11-22 01:11:20,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:11:20,089 INFO L93 Difference]: Finished difference Result 894 states and 961 transitions. [2022-11-22 01:11:20,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 280 states. [2022-11-22 01:11:20,096 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 3.9213483146067416) internal successors, (349), 88 states have internal predecessors, (349), 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 401 [2022-11-22 01:11:20,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:11:20,100 INFO L225 Difference]: With dead ends: 894 [2022-11-22 01:11:20,100 INFO L226 Difference]: Without dead ends: 894 [2022-11-22 01:11:20,109 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1500 GetRequests, 1128 SyntacticMatches, 4 SemanticMatches, 368 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49209 ImplicationChecksByTransitivity, 13.2s TimeCoverageRelationStatistics Valid=17043, Invalid=119487, Unknown=0, NotChecked=0, Total=136530 [2022-11-22 01:11:20,110 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 1665 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 3908 mSolverCounterSat, 475 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1665 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 4383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 475 IncrementalHoareTripleChecker+Valid, 3908 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-11-22 01:11:20,111 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1665 Valid, 5 Invalid, 4383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [475 Valid, 3908 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-11-22 01:11:20,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 894 states. [2022-11-22 01:11:20,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 894 to 891. [2022-11-22 01:11:20,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 891 states, 890 states have (on average 1.0764044943820226) internal successors, (958), 890 states have internal predecessors, (958), 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) [2022-11-22 01:11:20,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 891 states to 891 states and 958 transitions. [2022-11-22 01:11:20,126 INFO L78 Accepts]: Start accepts. Automaton has 891 states and 958 transitions. Word has length 401 [2022-11-22 01:11:20,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:11:20,127 INFO L495 AbstractCegarLoop]: Abstraction has 891 states and 958 transitions. [2022-11-22 01:11:20,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 3.9213483146067416) internal successors, (349), 88 states have internal predecessors, (349), 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) [2022-11-22 01:11:20,127 INFO L276 IsEmpty]: Start isEmpty. Operand 891 states and 958 transitions. [2022-11-22 01:11:20,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 756 [2022-11-22 01:11:20,133 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:11:20,134 INFO L195 NwaCegarLoop]: trace histogram [230, 230, 229, 22, 21, 21, 1, 1] [2022-11-22 01:11:20,145 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-11-22 01:11:20,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:11:20,340 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-22 01:11:20,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:11:20,340 INFO L85 PathProgramCache]: Analyzing trace with hash 617893410, now seen corresponding path program 10 times [2022-11-22 01:11:20,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:11:20,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749293133] [2022-11-22 01:11:20,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:11:20,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:11:20,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:11:24,436 INFO L134 CoverageAnalysis]: Checked inductivity of 84486 backedges. 38728 proven. 726 refuted. 0 times theorem prover too weak. 45032 trivial. 0 not checked. [2022-11-22 01:11:24,437 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:11:24,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749293133] [2022-11-22 01:11:24,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749293133] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:11:24,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762882007] [2022-11-22 01:11:24,438 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-22 01:11:24,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:11:24,438 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:11:24,440 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:11:24,464 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-11-22 01:11:25,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:11:25,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 3245 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-22 01:11:25,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:11:26,188 INFO L134 CoverageAnalysis]: Checked inductivity of 84486 backedges. 49344 proven. 3202 refuted. 0 times theorem prover too weak. 31940 trivial. 0 not checked. [2022-11-22 01:11:26,188 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:11:27,218 INFO L134 CoverageAnalysis]: Checked inductivity of 84486 backedges. 49344 proven. 3202 refuted. 0 times theorem prover too weak. 31940 trivial. 0 not checked. [2022-11-22 01:11:27,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1762882007] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:11:27,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1486600044] [2022-11-22 01:11:27,220 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-22 01:11:27,220 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:11:27,220 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:11:27,220 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:11:27,221 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:11:27,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:11:27,231 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-11-22 01:11:27,254 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-22 01:11:27,331 INFO L321 Elim1Store]: treesize reduction 18, result has 33.3 percent of original size [2022-11-22 01:11:27,332 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 225 treesize of output 231 [2022-11-22 01:11:27,408 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 15 treesize of output 14 [2022-11-22 01:11:27,428 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 01:11:27,474 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 15 treesize of output 14 [2022-11-22 01:11:27,528 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 15 treesize of output 14 [2022-11-22 01:11:27,555 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 15 treesize of output 14 [2022-11-22 01:11:27,575 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 01:11:27,601 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 [2022-11-22 01:11:27,654 INFO L321 Elim1Store]: treesize reduction 18, result has 33.3 percent of original size [2022-11-22 01:11:27,654 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 111 treesize of output 117 [2022-11-22 01:11:27,701 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 15 treesize of output 14 [2022-11-22 01:11:27,719 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 01:11:27,740 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 15 treesize of output 14 [2022-11-22 01:11:27,784 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 121 treesize of output 123 [2022-11-22 01:11:27,860 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 15 treesize of output 14 [2022-11-22 01:11:27,879 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:11:28,920 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '28219#(and (<= |ULTIMATE.start_foo_#in~b#1.offset| 0) (not (<= (+ |ULTIMATE.start_foo_~i~0#1| |ULTIMATE.start_foo_~b#1.offset| 1) (select |#length| |ULTIMATE.start_foo_~b#1.base|))) (<= 0 |ULTIMATE.start_foo_~b#1.offset|) (< (mod |ULTIMATE.start_foo_~i~0#1| 4294967296) 33) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_foo_#in~b#1.base|) (<= 0 |ULTIMATE.start_foo_~b#1.base|) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_foo_#in~b#1.offset|) (<= 0 |ULTIMATE.start_foo_~size#1|) (<= |ULTIMATE.start_main_~#mask~0#1.offset| 0) (<= |ULTIMATE.start_foo_~i~0#1| (+ |ULTIMATE.start_foo_~size#1| 1)) (<= 0 |ULTIMATE.start_foo_#in~size#1|) (<= 0 |ULTIMATE.start_main_~#mask~0#1.base|) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#mask~0#1.offset|) (<= |ULTIMATE.start_foo_~b#1.offset| 0) (<= 0 |ULTIMATE.start_foo_~i~0#1|) (= |#NULL.base| 0))' at error location [2022-11-22 01:11:28,920 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:11:28,920 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:11:28,920 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 26, 26] total 66 [2022-11-22 01:11:28,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950784593] [2022-11-22 01:11:28,920 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 01:11:28,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-11-22 01:11:28,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:11:28,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-11-22 01:11:28,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=737, Invalid=4375, Unknown=0, NotChecked=0, Total=5112 [2022-11-22 01:11:28,935 INFO L87 Difference]: Start difference. First operand 891 states and 958 transitions. Second operand has 66 states, 66 states have (on average 3.5303030303030303) internal successors, (233), 66 states have internal predecessors, (233), 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) [2022-11-22 01:11:34,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:11:34,538 INFO L93 Difference]: Finished difference Result 891 states and 947 transitions. [2022-11-22 01:11:34,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2022-11-22 01:11:34,539 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 3.5303030303030303) internal successors, (233), 66 states have internal predecessors, (233), 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 755 [2022-11-22 01:11:34,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:11:34,542 INFO L225 Difference]: With dead ends: 891 [2022-11-22 01:11:34,542 INFO L226 Difference]: Without dead ends: 891 [2022-11-22 01:11:34,546 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2396 GetRequests, 2212 SyntacticMatches, 12 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8170 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=4943, Invalid=25159, Unknown=0, NotChecked=0, Total=30102 [2022-11-22 01:11:34,547 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 107 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4088 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 4110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 4088 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-22 01:11:34,547 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 0 Invalid, 4110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 4088 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-11-22 01:11:34,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 891 states. [2022-11-22 01:11:34,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 891 to 891. [2022-11-22 01:11:34,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 891 states, 890 states have (on average 1.0640449438202246) internal successors, (947), 890 states have internal predecessors, (947), 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) [2022-11-22 01:11:34,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 891 states to 891 states and 947 transitions. [2022-11-22 01:11:34,564 INFO L78 Accepts]: Start accepts. Automaton has 891 states and 947 transitions. Word has length 755 [2022-11-22 01:11:34,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:11:34,565 INFO L495 AbstractCegarLoop]: Abstraction has 891 states and 947 transitions. [2022-11-22 01:11:34,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 3.5303030303030303) internal successors, (233), 66 states have internal predecessors, (233), 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) [2022-11-22 01:11:34,566 INFO L276 IsEmpty]: Start isEmpty. Operand 891 states and 947 transitions. [2022-11-22 01:11:34,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 783 [2022-11-22 01:11:34,572 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:11:34,572 INFO L195 NwaCegarLoop]: trace histogram [239, 239, 238, 22, 21, 21, 1, 1] [2022-11-22 01:11:34,588 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-11-22 01:11:34,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:11:34,777 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-22 01:11:34,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:11:34,777 INFO L85 PathProgramCache]: Analyzing trace with hash -951918270, now seen corresponding path program 11 times [2022-11-22 01:11:34,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:11:34,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945166384] [2022-11-22 01:11:34,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:11:34,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:11:35,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:11:38,936 INFO L134 CoverageAnalysis]: Checked inductivity of 90993 backedges. 41545 proven. 846 refuted. 0 times theorem prover too weak. 48602 trivial. 0 not checked. [2022-11-22 01:11:38,937 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:11:38,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945166384] [2022-11-22 01:11:38,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945166384] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:11:38,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134354206] [2022-11-22 01:11:38,937 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 01:11:38,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:11:38,937 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:11:38,938 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:11:38,940 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-11-22 01:11:40,269 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2022-11-22 01:11:40,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:11:40,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 1037 conjuncts, 45 conjunts are in the unsatisfiable core [2022-11-22 01:11:40,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:11:42,072 INFO L134 CoverageAnalysis]: Checked inductivity of 90993 backedges. 33903 proven. 3534 refuted. 0 times theorem prover too weak. 53556 trivial. 0 not checked. [2022-11-22 01:11:42,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:11:44,447 INFO L134 CoverageAnalysis]: Checked inductivity of 90993 backedges. 33903 proven. 3534 refuted. 0 times theorem prover too weak. 53556 trivial. 0 not checked. [2022-11-22 01:11:44,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1134354206] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:11:44,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [882699232] [2022-11-22 01:11:44,449 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-22 01:11:44,449 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:11:44,449 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:11:44,449 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:11:44,450 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:11:44,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:11:44,459 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-11-22 01:11:44,484 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 [2022-11-22 01:11:44,566 INFO L321 Elim1Store]: treesize reduction 18, result has 33.3 percent of original size [2022-11-22 01:11:44,566 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 225 treesize of output 231 [2022-11-22 01:11:44,641 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 15 treesize of output 14 [2022-11-22 01:11:44,660 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 01:11:44,723 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 14 [2022-11-22 01:11:44,762 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 15 treesize of output 14 [2022-11-22 01:11:44,794 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 01:11:44,822 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 [2022-11-22 01:11:44,879 INFO L321 Elim1Store]: treesize reduction 18, result has 33.3 percent of original size [2022-11-22 01:11:44,879 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 111 treesize of output 117 [2022-11-22 01:11:44,935 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 15 treesize of output 14 [2022-11-22 01:11:44,955 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 01:11:44,973 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 15 treesize of output 14 [2022-11-22 01:11:45,018 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 121 treesize of output 123 [2022-11-22 01:11:45,071 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 15 treesize of output 14 [2022-11-22 01:11:45,094 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:11:46,405 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '35010#(and (<= |ULTIMATE.start_foo_#in~b#1.offset| 0) (not (<= (+ |ULTIMATE.start_foo_~i~0#1| |ULTIMATE.start_foo_~b#1.offset| 1) (select |#length| |ULTIMATE.start_foo_~b#1.base|))) (<= 0 |ULTIMATE.start_foo_~b#1.offset|) (< (mod |ULTIMATE.start_foo_~i~0#1| 4294967296) 33) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_foo_#in~b#1.base|) (<= 0 |ULTIMATE.start_foo_~b#1.base|) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_foo_#in~b#1.offset|) (<= 0 |ULTIMATE.start_foo_~size#1|) (<= |ULTIMATE.start_main_~#mask~0#1.offset| 0) (<= |ULTIMATE.start_foo_~i~0#1| (+ |ULTIMATE.start_foo_~size#1| 1)) (<= 0 |ULTIMATE.start_foo_#in~size#1|) (<= 0 |ULTIMATE.start_main_~#mask~0#1.base|) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#mask~0#1.offset|) (<= |ULTIMATE.start_foo_~b#1.offset| 0) (<= 0 |ULTIMATE.start_foo_~i~0#1|) (= |#NULL.base| 0))' at error location [2022-11-22 01:11:46,405 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:11:46,405 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:11:46,405 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 42, 42] total 112 [2022-11-22 01:11:46,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928650129] [2022-11-22 01:11:46,405 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 01:11:46,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 112 states [2022-11-22 01:11:46,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:11:46,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2022-11-22 01:11:46,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1924, Invalid=11882, Unknown=0, NotChecked=0, Total=13806 [2022-11-22 01:11:46,407 INFO L87 Difference]: Start difference. First operand 891 states and 947 transitions. Second operand has 112 states, 112 states have (on average 2.9375) internal successors, (329), 112 states have internal predecessors, (329), 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) [2022-11-22 01:11:57,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:11:57,678 INFO L93 Difference]: Finished difference Result 1030 states and 1091 transitions. [2022-11-22 01:11:57,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 202 states. [2022-11-22 01:11:57,679 INFO L78 Accepts]: Start accepts. Automaton has has 112 states, 112 states have (on average 2.9375) internal successors, (329), 112 states have internal predecessors, (329), 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 782 [2022-11-22 01:11:57,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:11:57,683 INFO L225 Difference]: With dead ends: 1030 [2022-11-22 01:11:57,684 INFO L226 Difference]: Without dead ends: 1030 [2022-11-22 01:11:57,690 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2575 GetRequests, 2261 SyntacticMatches, 0 SemanticMatches, 314 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31335 ImplicationChecksByTransitivity, 14.3s TimeCoverageRelationStatistics Valid=13440, Invalid=86100, Unknown=0, NotChecked=0, Total=99540 [2022-11-22 01:11:57,690 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1855 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2877 mSolverCounterSat, 535 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1855 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 3412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 535 IncrementalHoareTripleChecker+Valid, 2877 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-22 01:11:57,691 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1855 Valid, 0 Invalid, 3412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [535 Valid, 2877 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-22 01:11:57,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1030 states. [2022-11-22 01:11:57,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1030 to 960. [2022-11-22 01:11:57,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 960 states, 959 states have (on average 1.0573514077163713) internal successors, (1014), 959 states have internal predecessors, (1014), 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) [2022-11-22 01:11:57,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 960 states to 960 states and 1014 transitions. [2022-11-22 01:11:57,707 INFO L78 Accepts]: Start accepts. Automaton has 960 states and 1014 transitions. Word has length 782 [2022-11-22 01:11:57,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:11:57,707 INFO L495 AbstractCegarLoop]: Abstraction has 960 states and 1014 transitions. [2022-11-22 01:11:57,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 112 states, 112 states have (on average 2.9375) internal successors, (329), 112 states have internal predecessors, (329), 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) [2022-11-22 01:11:57,708 INFO L276 IsEmpty]: Start isEmpty. Operand 960 states and 1014 transitions. [2022-11-22 01:11:57,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 828 [2022-11-22 01:11:57,715 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:11:57,715 INFO L195 NwaCegarLoop]: trace histogram [254, 254, 253, 22, 21, 21, 1, 1] [2022-11-22 01:11:57,730 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-11-22 01:11:57,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-11-22 01:11:57,925 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-22 01:11:57,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:11:57,926 INFO L85 PathProgramCache]: Analyzing trace with hash 1184556578, now seen corresponding path program 12 times [2022-11-22 01:11:57,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:11:57,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690691648] [2022-11-22 01:11:57,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:11:57,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:11:58,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:12:02,034 INFO L134 CoverageAnalysis]: Checked inductivity of 102378 backedges. 53524 proven. 975 refuted. 0 times theorem prover too weak. 47879 trivial. 0 not checked. [2022-11-22 01:12:02,034 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:12:02,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690691648] [2022-11-22 01:12:02,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690691648] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:12:02,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924584829] [2022-11-22 01:12:02,035 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-22 01:12:02,035 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:12:02,036 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:12:02,037 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:12:02,039 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-11-22 01:12:12,244 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-22 01:12:12,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:12:12,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 3509 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-22 01:12:12,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:12:13,933 INFO L134 CoverageAnalysis]: Checked inductivity of 102378 backedges. 82604 proven. 7422 refuted. 0 times theorem prover too weak. 12352 trivial. 0 not checked. [2022-11-22 01:12:13,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:12:15,705 INFO L134 CoverageAnalysis]: Checked inductivity of 102378 backedges. 82604 proven. 7422 refuted. 0 times theorem prover too weak. 12352 trivial. 0 not checked. [2022-11-22 01:12:15,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924584829] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:12:15,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [835273370] [2022-11-22 01:12:15,707 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-22 01:12:15,707 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:12:15,707 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:12:15,708 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:12:15,708 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:12:15,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:12:15,726 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-11-22 01:12:15,748 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 15 treesize of output 14 [2022-11-22 01:12:15,814 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 235 treesize of output 237 [2022-11-22 01:12:15,872 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 15 treesize of output 14 [2022-11-22 01:12:15,891 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 01:12:15,937 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 15 treesize of output 14 [2022-11-22 01:12:15,989 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 15 treesize of output 14 [2022-11-22 01:12:16,024 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 15 treesize of output 14 [2022-11-22 01:12:16,044 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 01:12:16,069 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 [2022-11-22 01:12:16,139 INFO L321 Elim1Store]: treesize reduction 18, result has 33.3 percent of original size [2022-11-22 01:12:16,140 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 111 treesize of output 117 [2022-11-22 01:12:16,182 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 15 treesize of output 14 [2022-11-22 01:12:16,200 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 01:12:16,223 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 [2022-11-22 01:12:16,271 INFO L321 Elim1Store]: treesize reduction 18, result has 33.3 percent of original size [2022-11-22 01:12:16,271 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 111 treesize of output 117 [2022-11-22 01:12:16,312 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 15 treesize of output 14 [2022-11-22 01:12:16,328 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:12:16,975 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '42443#(and (<= |ULTIMATE.start_foo_#in~b#1.offset| 0) (not (<= (+ |ULTIMATE.start_foo_~i~0#1| |ULTIMATE.start_foo_~b#1.offset| 1) (select |#length| |ULTIMATE.start_foo_~b#1.base|))) (= |ULTIMATE.start_main_~#mask~0#1.offset| 0) (<= 0 |ULTIMATE.start_foo_~b#1.offset|) (< (mod |ULTIMATE.start_foo_~i~0#1| 4294967296) 33) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_foo_#in~b#1.base|) (<= 0 |ULTIMATE.start_foo_~b#1.base|) (<= 0 |ULTIMATE.start_foo_#in~b#1.offset|) (<= 0 |ULTIMATE.start_foo_~size#1|) (<= |ULTIMATE.start_foo_~i~0#1| (+ |ULTIMATE.start_foo_~size#1| 1)) (<= 0 |ULTIMATE.start_foo_#in~size#1|) (<= 0 |ULTIMATE.start_main_~#mask~0#1.base|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_foo_~b#1.offset| 0) (<= 0 |ULTIMATE.start_foo_~i~0#1|) (= |#NULL.base| 0))' at error location [2022-11-22 01:12:16,975 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:12:16,975 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:12:16,975 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34] total 84 [2022-11-22 01:12:16,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312459522] [2022-11-22 01:12:16,975 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 01:12:16,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2022-11-22 01:12:16,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:12:16,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2022-11-22 01:12:16,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1173, Invalid=6837, Unknown=0, NotChecked=0, Total=8010 [2022-11-22 01:12:16,978 INFO L87 Difference]: Start difference. First operand 960 states and 1014 transitions. Second operand has 84 states, 84 states have (on average 3.7857142857142856) internal successors, (318), 84 states have internal predecessors, (318), 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) [2022-11-22 01:12:30,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:12:30,366 INFO L93 Difference]: Finished difference Result 960 states and 977 transitions. [2022-11-22 01:12:30,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 224 states. [2022-11-22 01:12:30,366 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 3.7857142857142856) internal successors, (318), 84 states have internal predecessors, (318), 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 827 [2022-11-22 01:12:30,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:12:30,370 INFO L225 Difference]: With dead ends: 960 [2022-11-22 01:12:30,370 INFO L226 Difference]: Without dead ends: 960 [2022-11-22 01:12:30,375 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2717 GetRequests, 2412 SyntacticMatches, 14 SemanticMatches, 291 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23052 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=15540, Invalid=70016, Unknown=0, NotChecked=0, Total=85556 [2022-11-22 01:12:30,376 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 130 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 7803 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 7835 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 7803 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-11-22 01:12:30,376 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 0 Invalid, 7835 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 7803 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2022-11-22 01:12:30,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 960 states. [2022-11-22 01:12:30,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 960 to 960. [2022-11-22 01:12:30,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 960 states, 959 states have (on average 1.018769551616267) internal successors, (977), 959 states have internal predecessors, (977), 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) [2022-11-22 01:12:30,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 960 states to 960 states and 977 transitions. [2022-11-22 01:12:30,391 INFO L78 Accepts]: Start accepts. Automaton has 960 states and 977 transitions. Word has length 827 [2022-11-22 01:12:30,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:12:30,391 INFO L495 AbstractCegarLoop]: Abstraction has 960 states and 977 transitions. [2022-11-22 01:12:30,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 3.7857142857142856) internal successors, (318), 84 states have internal predecessors, (318), 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) [2022-11-22 01:12:30,392 INFO L276 IsEmpty]: Start isEmpty. Operand 960 states and 977 transitions. [2022-11-22 01:12:30,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 879 [2022-11-22 01:12:30,399 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:12:30,400 INFO L195 NwaCegarLoop]: trace histogram [271, 271, 270, 22, 21, 21, 1, 1] [2022-11-22 01:12:30,425 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-11-22 01:12:30,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-11-22 01:12:30,621 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-22 01:12:30,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:12:30,622 INFO L85 PathProgramCache]: Analyzing trace with hash -46384582, now seen corresponding path program 13 times [2022-11-22 01:12:30,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:12:30,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386919929] [2022-11-22 01:12:30,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:12:30,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:12:30,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:12:34,578 INFO L134 CoverageAnalysis]: Checked inductivity of 116097 backedges. 68837 proven. 1260 refuted. 0 times theorem prover too weak. 46000 trivial. 0 not checked. [2022-11-22 01:12:34,578 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:12:34,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386919929] [2022-11-22 01:12:34,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386919929] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:12:34,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865775974] [2022-11-22 01:12:34,579 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-22 01:12:34,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:12:34,581 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:12:34,582 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:12:34,585 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-11-22 01:12:35,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:12:35,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 3696 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-22 01:12:35,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:12:36,977 INFO L134 CoverageAnalysis]: Checked inductivity of 116097 backedges. 84616 proven. 7246 refuted. 0 times theorem prover too weak. 24235 trivial. 0 not checked. [2022-11-22 01:12:36,977 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:12:38,641 INFO L134 CoverageAnalysis]: Checked inductivity of 116097 backedges. 84616 proven. 7246 refuted. 0 times theorem prover too weak. 24235 trivial. 0 not checked. [2022-11-22 01:12:38,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1865775974] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:12:38,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2040848219] [2022-11-22 01:12:38,643 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-22 01:12:38,643 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:12:38,644 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:12:38,644 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:12:38,644 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:12:38,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:12:38,658 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-11-22 01:12:38,686 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 [2022-11-22 01:12:38,761 INFO L321 Elim1Store]: treesize reduction 18, result has 33.3 percent of original size [2022-11-22 01:12:38,761 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 225 treesize of output 231 [2022-11-22 01:12:38,846 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 15 treesize of output 14 [2022-11-22 01:12:38,862 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 11 treesize of output 7 [2022-11-22 01:12:38,943 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 [2022-11-22 01:12:38,995 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 15 treesize of output 14 [2022-11-22 01:12:39,031 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 15 treesize of output 14 [2022-11-22 01:12:39,051 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 01:12:39,086 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 15 treesize of output 14 [2022-11-22 01:12:39,130 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 121 treesize of output 123 [2022-11-22 01:12:39,176 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 15 treesize of output 14 [2022-11-22 01:12:39,205 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 16 treesize of output 12 [2022-11-22 01:12:39,223 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 15 treesize of output 14 [2022-11-22 01:12:39,318 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 121 treesize of output 123 [2022-11-22 01:12:39,367 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 15 treesize of output 14 [2022-11-22 01:12:39,389 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:12:40,378 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '50124#(and (<= |ULTIMATE.start_foo_#in~b#1.offset| 0) (not (<= (+ |ULTIMATE.start_foo_~i~0#1| |ULTIMATE.start_foo_~b#1.offset| 1) (select |#length| |ULTIMATE.start_foo_~b#1.base|))) (<= 0 |ULTIMATE.start_foo_~b#1.offset|) (< (mod |ULTIMATE.start_foo_~i~0#1| 4294967296) 33) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_foo_#in~b#1.base|) (<= 0 |ULTIMATE.start_foo_~b#1.base|) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_foo_#in~b#1.offset|) (<= 0 |ULTIMATE.start_foo_~size#1|) (<= |ULTIMATE.start_main_~#mask~0#1.offset| 0) (<= |ULTIMATE.start_foo_~i~0#1| (+ |ULTIMATE.start_foo_~size#1| 1)) (<= 0 |ULTIMATE.start_foo_#in~size#1|) (<= 0 |ULTIMATE.start_main_~#mask~0#1.base|) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#mask~0#1.offset|) (<= |ULTIMATE.start_foo_~b#1.offset| 0) (<= 0 |ULTIMATE.start_foo_~i~0#1|) (= |#NULL.base| 0))' at error location [2022-11-22 01:12:40,379 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:12:40,379 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:12:40,380 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 34, 34] total 86 [2022-11-22 01:12:40,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464513563] [2022-11-22 01:12:40,380 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 01:12:40,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-11-22 01:12:40,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:12:40,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-11-22 01:12:40,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1191, Invalid=7181, Unknown=0, NotChecked=0, Total=8372 [2022-11-22 01:12:40,383 INFO L87 Difference]: Start difference. First operand 960 states and 977 transitions. Second operand has 86 states, 86 states have (on average 3.546511627906977) internal successors, (305), 86 states have internal predecessors, (305), 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) [2022-11-22 01:12:51,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:12:51,620 INFO L93 Difference]: Finished difference Result 960 states and 975 transitions. [2022-11-22 01:12:51,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 187 states. [2022-11-22 01:12:51,621 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 3.546511627906977) internal successors, (305), 86 states have internal predecessors, (305), 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 878 [2022-11-22 01:12:51,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:12:51,624 INFO L225 Difference]: With dead ends: 960 [2022-11-22 01:12:51,625 INFO L226 Difference]: Without dead ends: 960 [2022-11-22 01:12:51,630 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2839 GetRequests, 2565 SyntacticMatches, 16 SemanticMatches, 258 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18412 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=11062, Invalid=56278, Unknown=0, NotChecked=0, Total=67340 [2022-11-22 01:12:51,631 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 137 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 7503 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 7536 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 7503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-11-22 01:12:51,631 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 0 Invalid, 7536 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 7503 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-11-22 01:12:51,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 960 states. [2022-11-22 01:12:51,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 960 to 960. [2022-11-22 01:12:51,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 960 states, 959 states have (on average 1.0166840458811262) internal successors, (975), 959 states have internal predecessors, (975), 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) [2022-11-22 01:12:51,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 960 states to 960 states and 975 transitions. [2022-11-22 01:12:51,645 INFO L78 Accepts]: Start accepts. Automaton has 960 states and 975 transitions. Word has length 878 [2022-11-22 01:12:51,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:12:51,646 INFO L495 AbstractCegarLoop]: Abstraction has 960 states and 975 transitions. [2022-11-22 01:12:51,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 3.546511627906977) internal successors, (305), 86 states have internal predecessors, (305), 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) [2022-11-22 01:12:51,646 INFO L276 IsEmpty]: Start isEmpty. Operand 960 states and 975 transitions. [2022-11-22 01:12:51,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 885 [2022-11-22 01:12:51,654 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:12:51,654 INFO L195 NwaCegarLoop]: trace histogram [273, 273, 272, 22, 21, 21, 1, 1] [2022-11-22 01:12:51,666 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-11-22 01:12:51,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-11-22 01:12:51,866 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-22 01:12:51,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:12:51,867 INFO L85 PathProgramCache]: Analyzing trace with hash -88985198, now seen corresponding path program 14 times [2022-11-22 01:12:51,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:12:51,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078028969] [2022-11-22 01:12:51,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:12:51,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:12:52,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:12:56,954 INFO L134 CoverageAnalysis]: Checked inductivity of 117768 backedges. 89380 proven. 9278 refuted. 0 times theorem prover too weak. 19110 trivial. 0 not checked. [2022-11-22 01:12:56,955 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:12:56,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078028969] [2022-11-22 01:12:56,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078028969] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:12:56,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656288153] [2022-11-22 01:12:56,955 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 01:12:56,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:12:56,955 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:12:56,956 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:12:56,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-11-22 01:12:58,369 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2022-11-22 01:12:58,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:12:58,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 1037 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-22 01:12:58,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:12:58,404 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-22 01:12:58,404 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-11-22 01:13:03,408 INFO L134 CoverageAnalysis]: Checked inductivity of 117768 backedges. 0 proven. 18492 refuted. 0 times theorem prover too weak. 99276 trivial. 0 not checked. [2022-11-22 01:13:03,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:13:09,510 INFO L134 CoverageAnalysis]: Checked inductivity of 117768 backedges. 0 proven. 18492 refuted. 0 times theorem prover too weak. 99276 trivial. 0 not checked. [2022-11-22 01:13:09,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [656288153] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:13:09,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1134063767] [2022-11-22 01:13:09,511 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-22 01:13:09,512 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:13:09,512 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:13:09,512 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:13:09,513 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:13:09,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:13:09,525 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-11-22 01:13:09,553 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 [2022-11-22 01:13:09,657 INFO L321 Elim1Store]: treesize reduction 18, result has 33.3 percent of original size [2022-11-22 01:13:09,657 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 225 treesize of output 231 [2022-11-22 01:13:09,734 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 15 treesize of output 14 [2022-11-22 01:13:09,759 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 11 treesize of output 7 [2022-11-22 01:13:09,828 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 [2022-11-22 01:13:09,882 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 15 treesize of output 14 [2022-11-22 01:13:09,922 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 15 treesize of output 14 [2022-11-22 01:13:09,950 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 01:13:09,978 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 [2022-11-22 01:13:10,051 INFO L321 Elim1Store]: treesize reduction 18, result has 33.3 percent of original size [2022-11-22 01:13:10,051 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 111 treesize of output 117 [2022-11-22 01:13:10,154 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 15 treesize of output 14 [2022-11-22 01:13:10,176 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 01:13:10,196 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 15 treesize of output 14 [2022-11-22 01:13:10,258 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 121 treesize of output 123 [2022-11-22 01:13:10,316 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 15 treesize of output 14 [2022-11-22 01:13:10,343 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:13:11,419 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '57770#(and (<= |ULTIMATE.start_foo_#in~b#1.offset| 0) (not (<= (+ |ULTIMATE.start_foo_~i~0#1| |ULTIMATE.start_foo_~b#1.offset| 1) (select |#length| |ULTIMATE.start_foo_~b#1.base|))) (<= 0 |ULTIMATE.start_foo_~b#1.offset|) (< (mod |ULTIMATE.start_foo_~i~0#1| 4294967296) 33) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_foo_#in~b#1.base|) (<= 0 |ULTIMATE.start_foo_~b#1.base|) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_foo_#in~b#1.offset|) (<= 0 |ULTIMATE.start_foo_~size#1|) (<= |ULTIMATE.start_main_~#mask~0#1.offset| 0) (<= |ULTIMATE.start_foo_~i~0#1| (+ |ULTIMATE.start_foo_~size#1| 1)) (<= 0 |ULTIMATE.start_foo_#in~size#1|) (<= 0 |ULTIMATE.start_main_~#mask~0#1.base|) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#mask~0#1.offset|) (<= |ULTIMATE.start_foo_~b#1.offset| 0) (<= 0 |ULTIMATE.start_foo_~i~0#1|) (= |#NULL.base| 0))' at error location [2022-11-22 01:13:11,419 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:13:11,419 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:13:11,419 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 24, 24] total 84 [2022-11-22 01:13:11,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019222509] [2022-11-22 01:13:11,419 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 01:13:11,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2022-11-22 01:13:11,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:13:11,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2022-11-22 01:13:11,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1359, Invalid=6831, Unknown=0, NotChecked=0, Total=8190 [2022-11-22 01:13:11,421 INFO L87 Difference]: Start difference. First operand 960 states and 975 transitions. Second operand has 85 states, 85 states have (on average 3.6588235294117646) internal successors, (311), 84 states have internal predecessors, (311), 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) [2022-11-22 01:13:25,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:13:25,323 INFO L93 Difference]: Finished difference Result 1044 states and 1078 transitions. [2022-11-22 01:13:25,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 220 states. [2022-11-22 01:13:25,324 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 3.6588235294117646) internal successors, (311), 84 states have internal predecessors, (311), 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 884 [2022-11-22 01:13:25,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:13:25,329 INFO L225 Difference]: With dead ends: 1044 [2022-11-22 01:13:25,329 INFO L226 Difference]: Without dead ends: 1044 [2022-11-22 01:13:25,336 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2904 GetRequests, 2597 SyntacticMatches, 0 SemanticMatches, 307 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27350 ImplicationChecksByTransitivity, 15.8s TimeCoverageRelationStatistics Valid=20764, Invalid=74408, Unknown=0, NotChecked=0, Total=95172 [2022-11-22 01:13:25,337 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 457 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2134 mSolverCounterSat, 255 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 457 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 2389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 255 IncrementalHoareTripleChecker+Valid, 2134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-22 01:13:25,337 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [457 Valid, 0 Invalid, 2389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [255 Valid, 2134 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-22 01:13:25,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1044 states. [2022-11-22 01:13:25,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1044 to 990. [2022-11-22 01:13:25,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 990 states, 989 states have (on average 1.025278058645096) internal successors, (1014), 989 states have internal predecessors, (1014), 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) [2022-11-22 01:13:25,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 990 states to 990 states and 1014 transitions. [2022-11-22 01:13:25,351 INFO L78 Accepts]: Start accepts. Automaton has 990 states and 1014 transitions. Word has length 884 [2022-11-22 01:13:25,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:13:25,351 INFO L495 AbstractCegarLoop]: Abstraction has 990 states and 1014 transitions. [2022-11-22 01:13:25,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 3.6588235294117646) internal successors, (311), 84 states have internal predecessors, (311), 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) [2022-11-22 01:13:25,352 INFO L276 IsEmpty]: Start isEmpty. Operand 990 states and 1014 transitions. [2022-11-22 01:13:25,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 918 [2022-11-22 01:13:25,360 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:13:25,360 INFO L195 NwaCegarLoop]: trace histogram [284, 284, 283, 22, 21, 21, 1, 1] [2022-11-22 01:13:25,369 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-11-22 01:13:25,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:13:25,569 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-22 01:13:25,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:13:25,570 INFO L85 PathProgramCache]: Analyzing trace with hash -1702195846, now seen corresponding path program 15 times [2022-11-22 01:13:25,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:13:25,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529832400] [2022-11-22 01:13:25,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:13:25,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:13:26,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:13:30,420 INFO L134 CoverageAnalysis]: Checked inductivity of 127173 backedges. 102184 proven. 12671 refuted. 0 times theorem prover too weak. 12318 trivial. 0 not checked. [2022-11-22 01:13:30,420 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:13:30,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529832400] [2022-11-22 01:13:30,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529832400] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:13:30,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684614791] [2022-11-22 01:13:30,420 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-22 01:13:30,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:13:30,421 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:13:30,421 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:13:30,422 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-11-22 01:13:44,848 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-22 01:13:44,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:13:44,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 3839 conjuncts, 42 conjunts are in the unsatisfiable core [2022-11-22 01:13:44,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:13:46,470 INFO L134 CoverageAnalysis]: Checked inductivity of 127173 backedges. 103001 proven. 11854 refuted. 0 times theorem prover too weak. 12318 trivial. 0 not checked. [2022-11-22 01:13:46,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:13:48,368 INFO L134 CoverageAnalysis]: Checked inductivity of 127173 backedges. 103001 proven. 11854 refuted. 0 times theorem prover too weak. 12318 trivial. 0 not checked. [2022-11-22 01:13:48,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [684614791] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:13:48,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1715807099] [2022-11-22 01:13:48,369 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-22 01:13:48,370 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:13:48,370 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:13:48,370 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:13:48,370 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:13:48,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:13:48,385 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-11-22 01:13:48,412 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 [2022-11-22 01:13:48,488 INFO L321 Elim1Store]: treesize reduction 18, result has 33.3 percent of original size [2022-11-22 01:13:48,489 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 225 treesize of output 231 [2022-11-22 01:13:48,559 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 15 treesize of output 14 [2022-11-22 01:13:48,577 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 01:13:48,625 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 15 treesize of output 14 [2022-11-22 01:13:48,673 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 15 treesize of output 14 [2022-11-22 01:13:48,701 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 01:13:48,734 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 [2022-11-22 01:13:48,795 INFO L321 Elim1Store]: treesize reduction 18, result has 33.3 percent of original size [2022-11-22 01:13:48,795 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 111 treesize of output 117 [2022-11-22 01:13:48,844 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 15 treesize of output 14 [2022-11-22 01:13:48,863 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 16 treesize of output 12 [2022-11-22 01:13:48,887 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 15 treesize of output 14 [2022-11-22 01:13:48,985 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 121 treesize of output 123 [2022-11-22 01:13:49,049 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 15 treesize of output 14 [2022-11-22 01:13:49,073 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:13:50,083 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '65824#(and (<= |ULTIMATE.start_foo_#in~b#1.offset| 0) (not (<= (+ |ULTIMATE.start_foo_~i~0#1| |ULTIMATE.start_foo_~b#1.offset| 1) (select |#length| |ULTIMATE.start_foo_~b#1.base|))) (<= 0 |ULTIMATE.start_foo_~b#1.offset|) (< (mod |ULTIMATE.start_foo_~i~0#1| 4294967296) 33) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_foo_#in~b#1.base|) (<= 0 |ULTIMATE.start_foo_~b#1.base|) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_foo_#in~b#1.offset|) (<= 0 |ULTIMATE.start_foo_~size#1|) (<= |ULTIMATE.start_main_~#mask~0#1.offset| 0) (<= |ULTIMATE.start_foo_~i~0#1| (+ |ULTIMATE.start_foo_~size#1| 1)) (<= 0 |ULTIMATE.start_foo_#in~size#1|) (<= 0 |ULTIMATE.start_main_~#mask~0#1.base|) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#mask~0#1.offset|) (<= |ULTIMATE.start_foo_~b#1.offset| 0) (<= 0 |ULTIMATE.start_foo_~i~0#1|) (= |#NULL.base| 0))' at error location [2022-11-22 01:13:50,083 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:13:50,083 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:13:50,083 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40, 40] total 81 [2022-11-22 01:13:50,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488817410] [2022-11-22 01:13:50,083 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 01:13:50,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2022-11-22 01:13:50,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:13:50,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2022-11-22 01:13:50,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1395, Invalid=6261, Unknown=0, NotChecked=0, Total=7656 [2022-11-22 01:13:50,086 INFO L87 Difference]: Start difference. First operand 990 states and 1014 transitions. Second operand has 82 states, 82 states have (on average 3.658536585365854) internal successors, (300), 81 states have internal predecessors, (300), 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) [2022-11-22 01:13:59,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:13:59,495 INFO L93 Difference]: Finished difference Result 990 states and 1009 transitions. [2022-11-22 01:13:59,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 231 states. [2022-11-22 01:13:59,496 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 3.658536585365854) internal successors, (300), 81 states have internal predecessors, (300), 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 917 [2022-11-22 01:13:59,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:13:59,500 INFO L225 Difference]: With dead ends: 990 [2022-11-22 01:13:59,500 INFO L226 Difference]: Without dead ends: 990 [2022-11-22 01:13:59,504 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2998 GetRequests, 2684 SyntacticMatches, 19 SemanticMatches, 295 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27023 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=23079, Invalid=64833, Unknown=0, NotChecked=0, Total=87912 [2022-11-22 01:13:59,505 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 130 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2308 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 2345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 2308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-22 01:13:59,505 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 0 Invalid, 2345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 2308 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-22 01:13:59,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 990 states. [2022-11-22 01:13:59,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 990 to 990. [2022-11-22 01:13:59,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 990 states, 989 states have (on average 1.0202224469160768) internal successors, (1009), 989 states have internal predecessors, (1009), 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) [2022-11-22 01:13:59,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 990 states to 990 states and 1009 transitions. [2022-11-22 01:13:59,518 INFO L78 Accepts]: Start accepts. Automaton has 990 states and 1009 transitions. Word has length 917 [2022-11-22 01:13:59,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:13:59,519 INFO L495 AbstractCegarLoop]: Abstraction has 990 states and 1009 transitions. [2022-11-22 01:13:59,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 3.658536585365854) internal successors, (300), 81 states have internal predecessors, (300), 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) [2022-11-22 01:13:59,520 INFO L276 IsEmpty]: Start isEmpty. Operand 990 states and 1009 transitions. [2022-11-22 01:13:59,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 921 [2022-11-22 01:13:59,528 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:13:59,528 INFO L195 NwaCegarLoop]: trace histogram [285, 285, 284, 22, 21, 21, 1, 1] [2022-11-22 01:13:59,556 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-11-22 01:13:59,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-11-22 01:13:59,748 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-22 01:13:59,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:13:59,749 INFO L85 PathProgramCache]: Analyzing trace with hash -1736954910, now seen corresponding path program 16 times [2022-11-22 01:13:59,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:13:59,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086272884] [2022-11-22 01:13:59,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:13:59,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:14:00,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:14:06,679 INFO L134 CoverageAnalysis]: Checked inductivity of 128046 backedges. 1994 proven. 120487 refuted. 0 times theorem prover too weak. 5565 trivial. 0 not checked. [2022-11-22 01:14:06,680 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:14:06,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086272884] [2022-11-22 01:14:06,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086272884] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:14:06,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111765203] [2022-11-22 01:14:06,680 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-22 01:14:06,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:14:06,680 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:14:06,681 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:14:06,683 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-11-22 01:14:07,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:14:07,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 3850 conjuncts, 49 conjunts are in the unsatisfiable core [2022-11-22 01:14:07,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:14:09,957 INFO L134 CoverageAnalysis]: Checked inductivity of 128046 backedges. 8955 proven. 113400 refuted. 0 times theorem prover too weak. 5691 trivial. 0 not checked. [2022-11-22 01:14:09,957 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:14:12,043 INFO L134 CoverageAnalysis]: Checked inductivity of 128046 backedges. 8955 proven. 113400 refuted. 0 times theorem prover too weak. 5691 trivial. 0 not checked. [2022-11-22 01:14:12,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111765203] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:14:12,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1382258184] [2022-11-22 01:14:12,045 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-22 01:14:12,046 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:14:12,046 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:14:12,046 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:14:12,046 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:14:12,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:14:12,059 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-11-22 01:14:12,081 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 [2022-11-22 01:14:12,166 INFO L321 Elim1Store]: treesize reduction 18, result has 33.3 percent of original size [2022-11-22 01:14:12,166 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 225 treesize of output 231 [2022-11-22 01:14:12,243 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 15 treesize of output 14 [2022-11-22 01:14:12,265 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 01:14:12,324 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 [2022-11-22 01:14:12,364 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 15 treesize of output 14 [2022-11-22 01:14:12,400 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 16 treesize of output 12 [2022-11-22 01:14:12,428 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 15 treesize of output 14 [2022-11-22 01:14:12,471 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 121 treesize of output 123 [2022-11-22 01:14:12,534 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 15 treesize of output 14 [2022-11-22 01:14:12,566 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 [2022-11-22 01:14:12,593 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 15 treesize of output 14 [2022-11-22 01:14:12,638 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 121 treesize of output 123 [2022-11-22 01:14:12,743 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 15 treesize of output 14 [2022-11-22 01:14:12,765 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:14:14,023 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '73825#(and (<= |ULTIMATE.start_foo_#in~b#1.offset| 0) (not (<= (+ |ULTIMATE.start_foo_~i~0#1| |ULTIMATE.start_foo_~b#1.offset| 1) (select |#length| |ULTIMATE.start_foo_~b#1.base|))) (<= 0 |ULTIMATE.start_foo_~b#1.offset|) (< (mod |ULTIMATE.start_foo_~i~0#1| 4294967296) 33) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_foo_#in~b#1.base|) (<= 0 |ULTIMATE.start_foo_~b#1.base|) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_foo_#in~b#1.offset|) (<= 0 |ULTIMATE.start_foo_~size#1|) (<= |ULTIMATE.start_main_~#mask~0#1.offset| 0) (<= |ULTIMATE.start_foo_~i~0#1| (+ |ULTIMATE.start_foo_~size#1| 1)) (<= 0 |ULTIMATE.start_foo_#in~size#1|) (<= 0 |ULTIMATE.start_main_~#mask~0#1.base|) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#mask~0#1.offset|) (<= |ULTIMATE.start_foo_~b#1.offset| 0) (<= 0 |ULTIMATE.start_foo_~i~0#1|) (= |#NULL.base| 0))' at error location [2022-11-22 01:14:14,023 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:14:14,023 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:14:14,024 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 47, 47] total 82 [2022-11-22 01:14:14,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445222257] [2022-11-22 01:14:14,024 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 01:14:14,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-11-22 01:14:14,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:14:14,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-11-22 01:14:14,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1570, Invalid=6262, Unknown=0, NotChecked=0, Total=7832 [2022-11-22 01:14:14,027 INFO L87 Difference]: Start difference. First operand 990 states and 1009 transitions. Second operand has 83 states, 83 states have (on average 3.7590361445783134) internal successors, (312), 82 states have internal predecessors, (312), 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) [2022-11-22 01:14:25,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:14:25,523 INFO L93 Difference]: Finished difference Result 1480 states and 1512 transitions. [2022-11-22 01:14:25,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 329 states. [2022-11-22 01:14:25,523 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 3.7590361445783134) internal successors, (312), 82 states have internal predecessors, (312), 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 920 [2022-11-22 01:14:25,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:14:25,531 INFO L225 Difference]: With dead ends: 1480 [2022-11-22 01:14:25,531 INFO L226 Difference]: Without dead ends: 1480 [2022-11-22 01:14:25,543 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3138 GetRequests, 2682 SyntacticMatches, 45 SemanticMatches, 411 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76243 ImplicationChecksByTransitivity, 13.1s TimeCoverageRelationStatistics Valid=30536, Invalid=139620, Unknown=0, NotChecked=0, Total=170156 [2022-11-22 01:14:25,543 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 527 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 3045 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 527 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 3211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 3045 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-22 01:14:25,544 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [527 Valid, 8 Invalid, 3211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 3045 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-11-22 01:14:25,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1480 states. [2022-11-22 01:14:25,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1480 to 1194. [2022-11-22 01:14:25,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1194 states, 1193 states have (on average 1.021793797150042) internal successors, (1219), 1193 states have internal predecessors, (1219), 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) [2022-11-22 01:14:25,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1194 states to 1194 states and 1219 transitions. [2022-11-22 01:14:25,563 INFO L78 Accepts]: Start accepts. Automaton has 1194 states and 1219 transitions. Word has length 920 [2022-11-22 01:14:25,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:14:25,564 INFO L495 AbstractCegarLoop]: Abstraction has 1194 states and 1219 transitions. [2022-11-22 01:14:25,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 3.7590361445783134) internal successors, (312), 82 states have internal predecessors, (312), 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) [2022-11-22 01:14:25,565 INFO L276 IsEmpty]: Start isEmpty. Operand 1194 states and 1219 transitions. [2022-11-22 01:14:25,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 984 [2022-11-22 01:14:25,575 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:14:25,575 INFO L195 NwaCegarLoop]: trace histogram [305, 305, 304, 23, 22, 22, 1, 1] [2022-11-22 01:14:25,589 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-11-22 01:14:25,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-11-22 01:14:25,789 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-22 01:14:25,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:14:25,789 INFO L85 PathProgramCache]: Analyzing trace with hash -2139502194, now seen corresponding path program 17 times [2022-11-22 01:14:25,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:14:25,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356244773] [2022-11-22 01:14:25,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:14:25,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:14:26,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:14:31,103 INFO L134 CoverageAnalysis]: Checked inductivity of 146505 backedges. 118958 proven. 14639 refuted. 0 times theorem prover too weak. 12908 trivial. 0 not checked. [2022-11-22 01:14:31,104 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:14:31,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356244773] [2022-11-22 01:14:31,104 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356244773] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:14:31,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036374893] [2022-11-22 01:14:31,105 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 01:14:31,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:14:31,105 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:14:31,108 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:14:31,117 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-11-22 01:14:33,389 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 26 check-sat command(s) [2022-11-22 01:14:33,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:14:33,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 1235 conjuncts, 44 conjunts are in the unsatisfiable core [2022-11-22 01:14:33,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:14:33,430 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-22 01:14:33,430 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-11-22 01:14:39,427 INFO L134 CoverageAnalysis]: Checked inductivity of 146505 backedges. 17491 proven. 28433 refuted. 0 times theorem prover too weak. 100581 trivial. 0 not checked. [2022-11-22 01:14:39,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:14:46,445 INFO L134 CoverageAnalysis]: Checked inductivity of 146505 backedges. 3 proven. 45921 refuted. 0 times theorem prover too weak. 100581 trivial. 0 not checked. [2022-11-22 01:14:46,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2036374893] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:14:46,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [307370932] [2022-11-22 01:14:46,447 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-22 01:14:46,447 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:14:46,447 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:14:46,448 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:14:46,448 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:14:46,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:14:46,460 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-11-22 01:14:46,489 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 15 treesize of output 14 [2022-11-22 01:14:46,623 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 235 treesize of output 237 [2022-11-22 01:14:46,697 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 15 treesize of output 14 [2022-11-22 01:14:46,724 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-22 01:14:46,803 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 [2022-11-22 01:14:46,861 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 15 treesize of output 14 [2022-11-22 01:14:46,895 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 15 treesize of output 14 [2022-11-22 01:14:46,920 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 16 treesize of output 12 [2022-11-22 01:14:46,946 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 15 treesize of output 14 [2022-11-22 01:14:47,003 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 121 treesize of output 123 [2022-11-22 01:14:47,062 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 15 treesize of output 14 [2022-11-22 01:14:47,087 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 16 treesize of output 12 [2022-11-22 01:14:47,112 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 [2022-11-22 01:14:47,168 INFO L321 Elim1Store]: treesize reduction 18, result has 33.3 percent of original size [2022-11-22 01:14:47,169 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 111 treesize of output 117 [2022-11-22 01:14:47,211 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 15 treesize of output 14 [2022-11-22 01:14:47,225 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:14:47,962 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '83150#(and (<= |ULTIMATE.start_foo_#in~b#1.offset| 0) (not (<= (+ |ULTIMATE.start_foo_~i~0#1| |ULTIMATE.start_foo_~b#1.offset| 1) (select |#length| |ULTIMATE.start_foo_~b#1.base|))) (= |ULTIMATE.start_main_~#mask~0#1.offset| 0) (<= 0 |ULTIMATE.start_foo_~b#1.offset|) (< (mod |ULTIMATE.start_foo_~i~0#1| 4294967296) 33) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_foo_#in~b#1.base|) (<= 0 |ULTIMATE.start_foo_~b#1.base|) (<= 0 |ULTIMATE.start_foo_#in~b#1.offset|) (<= 0 |ULTIMATE.start_foo_~size#1|) (<= |ULTIMATE.start_foo_~i~0#1| (+ |ULTIMATE.start_foo_~size#1| 1)) (<= 0 |ULTIMATE.start_foo_#in~size#1|) (<= 0 |ULTIMATE.start_main_~#mask~0#1.base|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_foo_~b#1.offset| 0) (<= 0 |ULTIMATE.start_foo_~i~0#1|) (= |#NULL.base| 0))' at error location [2022-11-22 01:14:47,962 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:14:47,962 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:14:47,963 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 31, 31] total 104 [2022-11-22 01:14:47,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686692642] [2022-11-22 01:14:47,963 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 01:14:47,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2022-11-22 01:14:47,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:14:47,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2022-11-22 01:14:47,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1961, Invalid=10249, Unknown=0, NotChecked=0, Total=12210 [2022-11-22 01:14:47,968 INFO L87 Difference]: Start difference. First operand 1194 states and 1219 transitions. Second operand has 105 states, 105 states have (on average 3.466666666666667) internal successors, (364), 104 states have internal predecessors, (364), 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) [2022-11-22 01:15:27,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:15:27,913 INFO L93 Difference]: Finished difference Result 1383 states and 1437 transitions. [2022-11-22 01:15:27,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 408 states. [2022-11-22 01:15:27,914 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 3.466666666666667) internal successors, (364), 104 states have internal predecessors, (364), 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 983 [2022-11-22 01:15:27,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:15:27,918 INFO L225 Difference]: With dead ends: 1383 [2022-11-22 01:15:27,918 INFO L226 Difference]: Without dead ends: 1383 [2022-11-22 01:15:27,934 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3395 GetRequests, 2880 SyntacticMatches, 0 SemanticMatches, 515 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89416 ImplicationChecksByTransitivity, 40.7s TimeCoverageRelationStatistics Valid=45548, Invalid=221224, Unknown=0, NotChecked=0, Total=266772 [2022-11-22 01:15:27,934 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1805 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4444 mSolverCounterSat, 429 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1805 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 4873 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 429 IncrementalHoareTripleChecker+Valid, 4444 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:15:27,935 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1805 Valid, 0 Invalid, 4873 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [429 Valid, 4444 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-11-22 01:15:27,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1383 states. [2022-11-22 01:15:27,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1383 to 1236. [2022-11-22 01:15:27,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1236 states, 1235 states have (on average 1.0275303643724696) internal successors, (1269), 1235 states have internal predecessors, (1269), 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) [2022-11-22 01:15:27,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1236 states to 1236 states and 1269 transitions. [2022-11-22 01:15:27,950 INFO L78 Accepts]: Start accepts. Automaton has 1236 states and 1269 transitions. Word has length 983 [2022-11-22 01:15:27,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:15:27,951 INFO L495 AbstractCegarLoop]: Abstraction has 1236 states and 1269 transitions. [2022-11-22 01:15:27,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 105 states have (on average 3.466666666666667) internal successors, (364), 104 states have internal predecessors, (364), 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) [2022-11-22 01:15:27,951 INFO L276 IsEmpty]: Start isEmpty. Operand 1236 states and 1269 transitions. [2022-11-22 01:15:27,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1161 [2022-11-22 01:15:27,963 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:15:27,964 INFO L195 NwaCegarLoop]: trace histogram [362, 362, 361, 25, 24, 24, 1, 1] [2022-11-22 01:15:27,976 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-11-22 01:15:28,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-11-22 01:15:28,172 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-22 01:15:28,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:15:28,172 INFO L85 PathProgramCache]: Analyzing trace with hash 1338453030, now seen corresponding path program 18 times [2022-11-22 01:15:28,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:15:28,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268045832] [2022-11-22 01:15:28,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:15:28,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:15:28,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:15:35,903 INFO L134 CoverageAnalysis]: Checked inductivity of 205563 backedges. 165250 proven. 16800 refuted. 0 times theorem prover too weak. 23513 trivial. 0 not checked. [2022-11-22 01:15:35,904 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:15:35,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268045832] [2022-11-22 01:15:35,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268045832] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:15:35,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391367863] [2022-11-22 01:15:35,904 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-22 01:15:35,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:15:35,904 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:15:35,906 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:15:35,908 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-11-22 01:16:08,323 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-22 01:16:08,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:16:08,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 4793 conjuncts, 61 conjunts are in the unsatisfiable core [2022-11-22 01:16:08,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:16:12,459 INFO L134 CoverageAnalysis]: Checked inductivity of 205563 backedges. 2242 proven. 194736 refuted. 0 times theorem prover too weak. 8585 trivial. 0 not checked. [2022-11-22 01:16:12,459 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:16:16,618 INFO L134 CoverageAnalysis]: Checked inductivity of 205563 backedges. 2242 proven. 194736 refuted. 0 times theorem prover too weak. 8585 trivial. 0 not checked. [2022-11-22 01:16:16,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391367863] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:16:16,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1603769286] [2022-11-22 01:16:16,619 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-22 01:16:16,619 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:16:16,619 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:16:16,620 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:16:16,620 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:16:16,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:16:16,632 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-11-22 01:16:16,655 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 [2022-11-22 01:16:16,732 INFO L321 Elim1Store]: treesize reduction 18, result has 33.3 percent of original size [2022-11-22 01:16:16,733 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 225 treesize of output 231 [2022-11-22 01:16:16,811 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 15 treesize of output 14 [2022-11-22 01:16:16,830 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 11 treesize of output 7 [2022-11-22 01:16:16,876 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 [2022-11-22 01:16:16,929 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 15 treesize of output 14 [2022-11-22 01:16:16,963 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 15 treesize of output 14 [2022-11-22 01:16:16,983 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 01:16:17,014 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 15 treesize of output 14 [2022-11-22 01:16:17,073 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 121 treesize of output 123 [2022-11-22 01:16:17,124 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 15 treesize of output 14 [2022-11-22 01:16:17,152 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 01:16:17,171 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 [2022-11-22 01:16:17,226 INFO L321 Elim1Store]: treesize reduction 18, result has 33.3 percent of original size [2022-11-22 01:16:17,227 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 111 treesize of output 117 [2022-11-22 01:16:17,277 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 15 treesize of output 14 [2022-11-22 01:16:17,290 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:16:18,334 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '93683#(and (<= |ULTIMATE.start_foo_#in~b#1.offset| 0) (not (<= (+ |ULTIMATE.start_foo_~i~0#1| |ULTIMATE.start_foo_~b#1.offset| 1) (select |#length| |ULTIMATE.start_foo_~b#1.base|))) (= |ULTIMATE.start_main_~#mask~0#1.offset| 0) (<= 0 |ULTIMATE.start_foo_~b#1.offset|) (< (mod |ULTIMATE.start_foo_~i~0#1| 4294967296) 33) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_foo_#in~b#1.base|) (<= 0 |ULTIMATE.start_foo_~b#1.base|) (<= 0 |ULTIMATE.start_foo_#in~b#1.offset|) (<= 0 |ULTIMATE.start_foo_~size#1|) (<= |ULTIMATE.start_foo_~i~0#1| (+ |ULTIMATE.start_foo_~size#1| 1)) (<= 0 |ULTIMATE.start_foo_#in~size#1|) (<= 0 |ULTIMATE.start_main_~#mask~0#1.base|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_foo_~b#1.offset| 0) (<= 0 |ULTIMATE.start_foo_~i~0#1|) (= |#NULL.base| 0))' at error location [2022-11-22 01:16:18,334 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:16:18,334 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:16:18,334 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 59, 59] total 141 [2022-11-22 01:16:18,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917730582] [2022-11-22 01:16:18,334 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 01:16:18,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 142 states [2022-11-22 01:16:18,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:16:18,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 142 interpolants. [2022-11-22 01:16:18,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3069, Invalid=18687, Unknown=0, NotChecked=0, Total=21756 [2022-11-22 01:16:18,337 INFO L87 Difference]: Start difference. First operand 1236 states and 1269 transitions. Second operand has 142 states, 142 states have (on average 4.02112676056338) internal successors, (571), 141 states have internal predecessors, (571), 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) [2022-11-22 01:16:58,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:16:58,186 INFO L93 Difference]: Finished difference Result 3538 states and 3725 transitions. [2022-11-22 01:16:58,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 620 states. [2022-11-22 01:16:58,186 INFO L78 Accepts]: Start accepts. Automaton has has 142 states, 142 states have (on average 4.02112676056338) internal successors, (571), 141 states have internal predecessors, (571), 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 1160 [2022-11-22 01:16:58,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:16:58,192 INFO L225 Difference]: With dead ends: 3538 [2022-11-22 01:16:58,192 INFO L226 Difference]: Without dead ends: 3538 [2022-11-22 01:16:58,210 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4137 GetRequests, 3357 SyntacticMatches, 19 SemanticMatches, 761 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220931 ImplicationChecksByTransitivity, 38.7s TimeCoverageRelationStatistics Valid=55314, Invalid=526092, Unknown=0, NotChecked=0, Total=581406 [2022-11-22 01:16:58,211 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 3648 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 14089 mSolverCounterSat, 1077 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3648 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 15166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1077 IncrementalHoareTripleChecker+Valid, 14089 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.0s IncrementalHoareTripleChecker+Time [2022-11-22 01:16:58,211 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3648 Valid, 3 Invalid, 15166 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1077 Valid, 14089 Invalid, 0 Unknown, 0 Unchecked, 7.0s Time] [2022-11-22 01:16:58,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3538 states. [2022-11-22 01:16:58,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3538 to 2313. [2022-11-22 01:16:58,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2313 states, 2312 states have (on average 1.0480103806228374) internal successors, (2423), 2312 states have internal predecessors, (2423), 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) [2022-11-22 01:16:58,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2313 states to 2313 states and 2423 transitions. [2022-11-22 01:16:58,242 INFO L78 Accepts]: Start accepts. Automaton has 2313 states and 2423 transitions. Word has length 1160 [2022-11-22 01:16:58,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:16:58,242 INFO L495 AbstractCegarLoop]: Abstraction has 2313 states and 2423 transitions. [2022-11-22 01:16:58,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 142 states, 142 states have (on average 4.02112676056338) internal successors, (571), 141 states have internal predecessors, (571), 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) [2022-11-22 01:16:58,243 INFO L276 IsEmpty]: Start isEmpty. Operand 2313 states and 2423 transitions. [2022-11-22 01:16:58,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1647 [2022-11-22 01:16:58,266 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:16:58,266 INFO L195 NwaCegarLoop]: trace histogram [517, 517, 516, 32, 31, 31, 1, 1] [2022-11-22 01:16:58,305 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-11-22 01:16:58,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-11-22 01:16:58,474 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-22 01:16:58,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:16:58,475 INFO L85 PathProgramCache]: Analyzing trace with hash 1846788026, now seen corresponding path program 19 times [2022-11-22 01:16:58,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:16:58,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948165086] [2022-11-22 01:16:58,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:16:58,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:16:59,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:17:09,129 INFO L134 CoverageAnalysis]: Checked inductivity of 417611 backedges. 172873 proven. 5593 refuted. 0 times theorem prover too weak. 239145 trivial. 0 not checked. [2022-11-22 01:17:09,129 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:17:09,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948165086] [2022-11-22 01:17:09,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948165086] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:17:09,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636325461] [2022-11-22 01:17:09,130 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-22 01:17:09,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:17:09,130 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:17:09,131 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:17:09,133 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-11-22 01:17:10,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:17:10,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 6722 conjuncts, 48 conjunts are in the unsatisfiable core [2022-11-22 01:17:10,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:17:13,488 INFO L134 CoverageAnalysis]: Checked inductivity of 417611 backedges. 303442 proven. 18082 refuted. 0 times theorem prover too weak. 96087 trivial. 0 not checked. [2022-11-22 01:17:13,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:17:16,646 INFO L134 CoverageAnalysis]: Checked inductivity of 417611 backedges. 303442 proven. 18082 refuted. 0 times theorem prover too weak. 96087 trivial. 0 not checked. [2022-11-22 01:17:16,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [636325461] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:17:16,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [467325983] [2022-11-22 01:17:16,648 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-22 01:17:16,648 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:17:16,648 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:17:16,648 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:17:16,648 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:17:16,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:17:16,659 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-11-22 01:17:16,681 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 [2022-11-22 01:17:16,761 INFO L321 Elim1Store]: treesize reduction 18, result has 33.3 percent of original size [2022-11-22 01:17:16,761 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 225 treesize of output 231 [2022-11-22 01:17:16,819 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 15 treesize of output 14 [2022-11-22 01:17:16,838 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 01:17:16,893 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 [2022-11-22 01:17:16,943 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 15 treesize of output 14 [2022-11-22 01:17:16,969 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 01:17:17,003 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 [2022-11-22 01:17:17,053 INFO L321 Elim1Store]: treesize reduction 18, result has 33.3 percent of original size [2022-11-22 01:17:17,054 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 111 treesize of output 117 [2022-11-22 01:17:17,102 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 15 treesize of output 14 [2022-11-22 01:17:17,121 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 01:17:17,139 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 [2022-11-22 01:17:17,191 INFO L321 Elim1Store]: treesize reduction 18, result has 33.3 percent of original size [2022-11-22 01:17:17,191 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 111 treesize of output 117 [2022-11-22 01:17:17,238 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 15 treesize of output 14 [2022-11-22 01:17:17,249 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:17:18,081 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '110758#(and (<= |ULTIMATE.start_foo_#in~b#1.offset| 0) (not (<= (+ |ULTIMATE.start_foo_~i~0#1| |ULTIMATE.start_foo_~b#1.offset| 1) (select |#length| |ULTIMATE.start_foo_~b#1.base|))) (= |ULTIMATE.start_main_~#mask~0#1.offset| 0) (<= 0 |ULTIMATE.start_foo_~b#1.offset|) (< (mod |ULTIMATE.start_foo_~i~0#1| 4294967296) 33) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_foo_#in~b#1.base|) (<= 0 |ULTIMATE.start_foo_~b#1.base|) (<= 0 |ULTIMATE.start_foo_#in~b#1.offset|) (<= 0 |ULTIMATE.start_foo_~size#1|) (<= |ULTIMATE.start_foo_~i~0#1| (+ |ULTIMATE.start_foo_~size#1| 1)) (<= 0 |ULTIMATE.start_foo_#in~size#1|) (<= 0 |ULTIMATE.start_main_~#mask~0#1.base|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_foo_~b#1.offset| 0) (<= 0 |ULTIMATE.start_foo_~i~0#1|) (= |#NULL.base| 0))' at error location [2022-11-22 01:17:18,081 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:17:18,081 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:17:18,082 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 46, 46] total 118 [2022-11-22 01:17:18,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195831923] [2022-11-22 01:17:18,082 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 01:17:18,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 118 states [2022-11-22 01:17:18,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:17:18,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2022-11-22 01:17:18,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2155, Invalid=13097, Unknown=0, NotChecked=0, Total=15252 [2022-11-22 01:17:18,085 INFO L87 Difference]: Start difference. First operand 2313 states and 2423 transitions. Second operand has 118 states, 118 states have (on average 3.5762711864406778) internal successors, (422), 118 states have internal predecessors, (422), 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) [2022-11-22 01:17:48,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:17:48,072 INFO L93 Difference]: Finished difference Result 1875 states and 1929 transitions. [2022-11-22 01:17:48,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 347 states. [2022-11-22 01:17:48,073 INFO L78 Accepts]: Start accepts. Automaton has has 118 states, 118 states have (on average 3.5762711864406778) internal successors, (422), 118 states have internal predecessors, (422), 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 1646 [2022-11-22 01:17:48,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:17:48,077 INFO L225 Difference]: With dead ends: 1875 [2022-11-22 01:17:48,077 INFO L226 Difference]: Without dead ends: 1875 [2022-11-22 01:17:48,084 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5310 GetRequests, 4845 SyntacticMatches, 22 SemanticMatches, 443 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54543 ImplicationChecksByTransitivity, 26.4s TimeCoverageRelationStatistics Valid=33208, Invalid=164372, Unknown=0, NotChecked=0, Total=197580 [2022-11-22 01:17:48,084 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 180 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 15712 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 15754 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 15712 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.8s IncrementalHoareTripleChecker+Time [2022-11-22 01:17:48,085 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [180 Valid, 0 Invalid, 15754 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [42 Valid, 15712 Invalid, 0 Unknown, 0 Unchecked, 6.8s Time] [2022-11-22 01:17:48,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1875 states. [2022-11-22 01:17:48,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1875 to 1875. [2022-11-22 01:17:48,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1875 states, 1874 states have (on average 1.0293489861259337) internal successors, (1929), 1874 states have internal predecessors, (1929), 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) [2022-11-22 01:17:48,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1875 states to 1875 states and 1929 transitions. [2022-11-22 01:17:48,105 INFO L78 Accepts]: Start accepts. Automaton has 1875 states and 1929 transitions. Word has length 1646 [2022-11-22 01:17:48,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:17:48,106 INFO L495 AbstractCegarLoop]: Abstraction has 1875 states and 1929 transitions. [2022-11-22 01:17:48,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 118 states, 118 states have (on average 3.5762711864406778) internal successors, (422), 118 states have internal predecessors, (422), 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) [2022-11-22 01:17:48,106 INFO L276 IsEmpty]: Start isEmpty. Operand 1875 states and 1929 transitions. [2022-11-22 01:17:48,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1692 [2022-11-22 01:17:48,130 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:17:48,130 INFO L195 NwaCegarLoop]: trace histogram [532, 532, 531, 32, 31, 31, 1, 1] [2022-11-22 01:17:48,150 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-11-22 01:17:48,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2022-11-22 01:17:48,349 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-22 01:17:48,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:17:48,350 INFO L85 PathProgramCache]: Analyzing trace with hash -1638501726, now seen corresponding path program 20 times [2022-11-22 01:17:48,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:17:48,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814103782] [2022-11-22 01:17:48,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:17:48,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:17:49,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:17:59,919 INFO L134 CoverageAnalysis]: Checked inductivity of 441656 backedges. 156982 proven. 2760 refuted. 0 times theorem prover too weak. 281914 trivial. 0 not checked. [2022-11-22 01:17:59,919 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:17:59,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814103782] [2022-11-22 01:17:59,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814103782] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:17:59,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775478140] [2022-11-22 01:17:59,920 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 01:17:59,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:17:59,920 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:17:59,921 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:17:59,923 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-11-22 01:18:10,857 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2022-11-22 01:18:10,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:18:10,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 1752 conjuncts, 66 conjunts are in the unsatisfiable core [2022-11-22 01:18:10,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:18:14,581 INFO L134 CoverageAnalysis]: Checked inductivity of 441656 backedges. 123620 proven. 8713 refuted. 0 times theorem prover too weak. 309323 trivial. 0 not checked. [2022-11-22 01:18:14,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:18:19,954 INFO L134 CoverageAnalysis]: Checked inductivity of 441656 backedges. 123620 proven. 8713 refuted. 0 times theorem prover too weak. 309323 trivial. 0 not checked. [2022-11-22 01:18:19,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1775478140] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:18:19,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2065455389] [2022-11-22 01:18:19,956 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-22 01:18:19,956 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 01:18:19,957 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 01:18:19,957 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 01:18:19,957 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 01:18:19,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:18:19,969 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-11-22 01:18:19,992 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 [2022-11-22 01:18:20,068 INFO L321 Elim1Store]: treesize reduction 18, result has 33.3 percent of original size [2022-11-22 01:18:20,069 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 225 treesize of output 231 [2022-11-22 01:18:20,128 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 15 treesize of output 14 [2022-11-22 01:18:20,147 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 16 treesize of output 12 [2022-11-22 01:18:20,200 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 [2022-11-22 01:18:20,238 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 15 treesize of output 14 [2022-11-22 01:18:20,270 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 01:18:20,296 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 15 treesize of output 14 [2022-11-22 01:18:20,344 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 121 treesize of output 123 [2022-11-22 01:18:20,399 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 15 treesize of output 14 [2022-11-22 01:18:20,422 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-22 01:18:20,445 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 [2022-11-22 01:18:20,495 INFO L321 Elim1Store]: treesize reduction 18, result has 33.3 percent of original size [2022-11-22 01:18:20,495 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 111 treesize of output 117 [2022-11-22 01:18:20,545 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 15 treesize of output 14 [2022-11-22 01:18:20,558 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 01:18:21,710 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '125473#(and (<= |ULTIMATE.start_foo_#in~b#1.offset| 0) (not (<= (+ |ULTIMATE.start_foo_~i~0#1| |ULTIMATE.start_foo_~b#1.offset| 1) (select |#length| |ULTIMATE.start_foo_~b#1.base|))) (= |ULTIMATE.start_main_~#mask~0#1.offset| 0) (<= 0 |ULTIMATE.start_foo_~b#1.offset|) (< (mod |ULTIMATE.start_foo_~i~0#1| 4294967296) 33) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (<= 0 |ULTIMATE.start_foo_#in~b#1.base|) (<= 0 |ULTIMATE.start_foo_~b#1.base|) (<= 0 |ULTIMATE.start_foo_#in~b#1.offset|) (<= 0 |ULTIMATE.start_foo_~size#1|) (<= |ULTIMATE.start_foo_~i~0#1| (+ |ULTIMATE.start_foo_~size#1| 1)) (<= 0 |ULTIMATE.start_foo_#in~size#1|) (<= 0 |ULTIMATE.start_main_~#mask~0#1.base|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_foo_~b#1.offset| 0) (<= 0 |ULTIMATE.start_foo_~i~0#1|) (= |#NULL.base| 0))' at error location [2022-11-22 01:18:21,711 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 01:18:21,711 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 01:18:21,711 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 63, 63] total 176 [2022-11-22 01:18:21,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79753437] [2022-11-22 01:18:21,712 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 01:18:21,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 176 states [2022-11-22 01:18:21,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 01:18:21,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 176 interpolants. [2022-11-22 01:18:21,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4331, Invalid=28611, Unknown=0, NotChecked=0, Total=32942 [2022-11-22 01:18:21,718 INFO L87 Difference]: Start difference. First operand 1875 states and 1929 transitions. Second operand has 176 states, 176 states have (on average 2.960227272727273) internal successors, (521), 176 states have internal predecessors, (521), 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) [2022-11-22 01:18:42,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:18:42,315 INFO L93 Difference]: Finished difference Result 2170 states and 2233 transitions. [2022-11-22 01:18:42,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 306 states. [2022-11-22 01:18:42,316 INFO L78 Accepts]: Start accepts. Automaton has has 176 states, 176 states have (on average 2.960227272727273) internal successors, (521), 176 states have internal predecessors, (521), 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 1691 [2022-11-22 01:18:42,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:18:42,321 INFO L225 Difference]: With dead ends: 2170 [2022-11-22 01:18:42,321 INFO L226 Difference]: Without dead ends: 2170 [2022-11-22 01:18:42,329 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5428 GetRequests, 4946 SyntacticMatches, 0 SemanticMatches, 482 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72273 ImplicationChecksByTransitivity, 27.1s TimeCoverageRelationStatistics Valid=31156, Invalid=202616, Unknown=0, NotChecked=0, Total=233772 [2022-11-22 01:18:42,329 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 3506 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 5473 mSolverCounterSat, 916 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3506 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 6389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 916 IncrementalHoareTripleChecker+Valid, 5473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-11-22 01:18:42,330 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3506 Valid, 0 Invalid, 6389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [916 Valid, 5473 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-11-22 01:18:42,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2170 states. [2022-11-22 01:18:42,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2170 to 1875. [2022-11-22 01:18:42,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1875 states, 1874 states have (on average 1.0240128068303096) internal successors, (1919), 1874 states have internal predecessors, (1919), 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) [2022-11-22 01:18:42,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1875 states to 1875 states and 1919 transitions. [2022-11-22 01:18:42,348 INFO L78 Accepts]: Start accepts. Automaton has 1875 states and 1919 transitions. Word has length 1691 [2022-11-22 01:18:42,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:18:42,349 INFO L495 AbstractCegarLoop]: Abstraction has 1875 states and 1919 transitions. [2022-11-22 01:18:42,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 176 states, 176 states have (on average 2.960227272727273) internal successors, (521), 176 states have internal predecessors, (521), 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) [2022-11-22 01:18:42,349 INFO L276 IsEmpty]: Start isEmpty. Operand 1875 states and 1919 transitions. [2022-11-22 01:18:42,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1731 [2022-11-22 01:18:42,373 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:18:42,374 INFO L195 NwaCegarLoop]: trace histogram [545, 545, 544, 32, 31, 31, 1, 1] [2022-11-22 01:18:42,389 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-11-22 01:18:42,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:18:42,589 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-22 01:18:42,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:18:42,590 INFO L85 PathProgramCache]: Analyzing trace with hash -649382550, now seen corresponding path program 21 times [2022-11-22 01:18:42,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 01:18:42,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695788490] [2022-11-22 01:18:42,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:18:42,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 01:18:43,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:18:54,234 INFO L134 CoverageAnalysis]: Checked inductivity of 463041 backedges. 196118 proven. 2988 refuted. 0 times theorem prover too weak. 263935 trivial. 0 not checked. [2022-11-22 01:18:54,234 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 01:18:54,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695788490] [2022-11-22 01:18:54,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695788490] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 01:18:54,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67925937] [2022-11-22 01:18:54,235 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-22 01:18:54,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:18:54,235 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:18:54,236 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:18:54,239 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c12e6212-0d69-4eed-90c3-edb47a66d9e5/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process