./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-examples/standard_strcpy_original-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62aefa12-4775-4111-8d73-1e190db303d8/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62aefa12-4775-4111-8d73-1e190db303d8/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62aefa12-4775-4111-8d73-1e190db303d8/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62aefa12-4775-4111-8d73-1e190db303d8/bin/utaipan-gh47qXpMRh/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-examples/standard_strcpy_original-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62aefa12-4775-4111-8d73-1e190db303d8/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62aefa12-4775-4111-8d73-1e190db303d8/bin/utaipan-gh47qXpMRh --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 25419aae3fa6b25817a0bb63109cdb8dd339b767b8ddb876acb37423139730d4 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 03:15:47,658 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 03:15:47,660 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 03:15:47,673 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 03:15:47,673 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 03:15:47,674 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 03:15:47,674 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 03:15:47,676 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 03:15:47,677 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 03:15:47,677 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 03:15:47,678 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 03:15:47,679 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 03:15:47,679 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 03:15:47,680 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 03:15:47,680 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 03:15:47,681 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 03:15:47,682 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 03:15:47,682 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 03:15:47,683 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 03:15:47,684 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 03:15:47,685 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 03:15:47,687 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 03:15:47,688 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 03:15:47,689 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 03:15:47,692 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 03:15:47,693 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 03:15:47,693 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 03:15:47,694 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 03:15:47,694 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 03:15:47,695 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 03:15:47,696 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 03:15:47,696 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 03:15:47,697 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 03:15:47,698 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 03:15:47,699 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 03:15:47,699 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 03:15:47,700 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 03:15:47,700 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 03:15:47,700 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 03:15:47,701 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 03:15:47,702 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 03:15:47,702 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62aefa12-4775-4111-8d73-1e190db303d8/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-12-14 03:15:47,723 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 03:15:47,723 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 03:15:47,724 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 03:15:47,724 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 03:15:47,725 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 03:15:47,725 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 03:15:47,725 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 03:15:47,725 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 03:15:47,725 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 03:15:47,726 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 03:15:47,726 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 03:15:47,726 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 03:15:47,726 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 03:15:47,726 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 03:15:47,726 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 03:15:47,727 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 03:15:47,727 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 03:15:47,727 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 03:15:47,728 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-14 03:15:47,728 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-14 03:15:47,728 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 03:15:47,728 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 03:15:47,728 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-14 03:15:47,729 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 03:15:47,729 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 03:15:47,729 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 03:15:47,729 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-14 03:15:47,729 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-14 03:15:47,729 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-14 03:15:47,730 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 03:15:47,730 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-14 03:15:47,730 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 03:15:47,730 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 03:15:47,730 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 03:15:47,730 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 03:15:47,731 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 03:15:47,731 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 03:15:47,731 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 03:15:47,731 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 03:15:47,731 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 03:15:47,731 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 03:15:47,732 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 03:15:47,732 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_62aefa12-4775-4111-8d73-1e190db303d8/bin/utaipan-gh47qXpMRh/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62aefa12-4775-4111-8d73-1e190db303d8/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 25419aae3fa6b25817a0bb63109cdb8dd339b767b8ddb876acb37423139730d4 [2022-12-14 03:15:47,935 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 03:15:47,954 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 03:15:47,957 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 03:15:47,958 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 03:15:47,958 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 03:15:47,959 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62aefa12-4775-4111-8d73-1e190db303d8/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/array-examples/standard_strcpy_original-1.i [2022-12-14 03:15:50,529 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 03:15:50,718 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 03:15:50,719 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62aefa12-4775-4111-8d73-1e190db303d8/sv-benchmarks/c/array-examples/standard_strcpy_original-1.i [2022-12-14 03:15:50,725 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62aefa12-4775-4111-8d73-1e190db303d8/bin/utaipan-gh47qXpMRh/data/bc91c07bc/d1bbe99d9e194b15bfdb0cd65e1f1e59/FLAGcee90e1bf [2022-12-14 03:15:51,086 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62aefa12-4775-4111-8d73-1e190db303d8/bin/utaipan-gh47qXpMRh/data/bc91c07bc/d1bbe99d9e194b15bfdb0cd65e1f1e59 [2022-12-14 03:15:51,088 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 03:15:51,089 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 03:15:51,090 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 03:15:51,090 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 03:15:51,093 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 03:15:51,093 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 03:15:51" (1/1) ... [2022-12-14 03:15:51,094 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@140a4cde and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:15:51, skipping insertion in model container [2022-12-14 03:15:51,094 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 03:15:51" (1/1) ... [2022-12-14 03:15:51,100 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 03:15:51,109 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 03:15:51,221 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62aefa12-4775-4111-8d73-1e190db303d8/sv-benchmarks/c/array-examples/standard_strcpy_original-1.i[819,832] [2022-12-14 03:15:51,234 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 03:15:51,240 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 03:15:51,249 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62aefa12-4775-4111-8d73-1e190db303d8/sv-benchmarks/c/array-examples/standard_strcpy_original-1.i[819,832] [2022-12-14 03:15:51,253 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 03:15:51,262 INFO L208 MainTranslator]: Completed translation [2022-12-14 03:15:51,263 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:15:51 WrapperNode [2022-12-14 03:15:51,263 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 03:15:51,264 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 03:15:51,264 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 03:15:51,264 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 03:15:51,269 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:15:51" (1/1) ... [2022-12-14 03:15:51,274 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:15:51" (1/1) ... [2022-12-14 03:15:51,286 INFO L138 Inliner]: procedures = 16, calls = 20, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 64 [2022-12-14 03:15:51,286 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 03:15:51,287 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 03:15:51,287 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 03:15:51,287 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 03:15:51,293 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:15:51" (1/1) ... [2022-12-14 03:15:51,293 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:15:51" (1/1) ... [2022-12-14 03:15:51,295 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:15:51" (1/1) ... [2022-12-14 03:15:51,295 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:15:51" (1/1) ... [2022-12-14 03:15:51,298 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:15:51" (1/1) ... [2022-12-14 03:15:51,301 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:15:51" (1/1) ... [2022-12-14 03:15:51,301 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:15:51" (1/1) ... [2022-12-14 03:15:51,302 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:15:51" (1/1) ... [2022-12-14 03:15:51,303 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 03:15:51,304 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 03:15:51,304 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 03:15:51,304 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 03:15:51,304 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:15:51" (1/1) ... [2022-12-14 03:15:51,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 03:15:51,317 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62aefa12-4775-4111-8d73-1e190db303d8/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 03:15:51,327 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62aefa12-4775-4111-8d73-1e190db303d8/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 03:15:51,329 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62aefa12-4775-4111-8d73-1e190db303d8/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 03:15:51,353 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 03:15:51,353 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 03:15:51,353 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-14 03:15:51,353 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-14 03:15:51,353 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 03:15:51,353 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 03:15:51,354 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-14 03:15:51,354 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 03:15:51,413 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 03:15:51,415 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 03:15:51,551 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 03:15:51,586 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 03:15:51,587 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-12-14 03:15:51,589 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 03:15:51 BoogieIcfgContainer [2022-12-14 03:15:51,589 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 03:15:51,592 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 03:15:51,592 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 03:15:51,595 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 03:15:51,595 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 03:15:51" (1/3) ... [2022-12-14 03:15:51,596 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28be38dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 03:15:51, skipping insertion in model container [2022-12-14 03:15:51,596 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:15:51" (2/3) ... [2022-12-14 03:15:51,596 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28be38dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 03:15:51, skipping insertion in model container [2022-12-14 03:15:51,596 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 03:15:51" (3/3) ... [2022-12-14 03:15:51,598 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_strcpy_original-1.i [2022-12-14 03:15:51,615 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 03:15:51,616 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 16 error locations. [2022-12-14 03:15:51,663 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 03:15:51,670 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;@50b3fea1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 03:15:51,671 INFO L358 AbstractCegarLoop]: Starting to check reachability of 16 error locations. [2022-12-14 03:15:51,675 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 33 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) [2022-12-14 03:15:51,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-12-14 03:15:51,680 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:15:51,681 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-12-14 03:15:51,682 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2022-12-14 03:15:51,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:15:51,687 INFO L85 PathProgramCache]: Analyzing trace with hash 114230, now seen corresponding path program 1 times [2022-12-14 03:15:51,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:15:51,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800988003] [2022-12-14 03:15:51,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:15:51,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:15:51,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:15:51,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 03:15:51,869 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:15:51,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800988003] [2022-12-14 03:15:51,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800988003] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 03:15:51,870 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 03:15:51,870 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 03:15:51,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799087870] [2022-12-14 03:15:51,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 03:15:51,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 03:15:51,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:15:51,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 03:15:51,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 03:15:51,906 INFO L87 Difference]: Start difference. First operand has 34 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 33 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) Second operand has 3 states, 3 states have (on average 1.0) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:15:51,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:15:51,981 INFO L93 Difference]: Finished difference Result 67 states and 70 transitions. [2022-12-14 03:15:51,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 03:15:51,983 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.0) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-12-14 03:15:51,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:15:51,990 INFO L225 Difference]: With dead ends: 67 [2022-12-14 03:15:51,991 INFO L226 Difference]: Without dead ends: 65 [2022-12-14 03:15:51,992 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 [2022-12-14 03:15:51,996 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 30 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 03:15:51,997 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 33 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 03:15:52,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-12-14 03:15:52,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 34. [2022-12-14 03:15:52,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 18 states have (on average 2.0) internal successors, (36), 33 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:15:52,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2022-12-14 03:15:52,026 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 3 [2022-12-14 03:15:52,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:15:52,026 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2022-12-14 03:15:52,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.0) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:15:52,026 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2022-12-14 03:15:52,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-12-14 03:15:52,027 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:15:52,027 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-12-14 03:15:52,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 03:15:52,027 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2022-12-14 03:15:52,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:15:52,028 INFO L85 PathProgramCache]: Analyzing trace with hash 111798, now seen corresponding path program 1 times [2022-12-14 03:15:52,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:15:52,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112838888] [2022-12-14 03:15:52,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:15:52,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:15:52,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:15:52,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 03:15:52,128 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:15:52,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112838888] [2022-12-14 03:15:52,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112838888] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 03:15:52,129 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 03:15:52,129 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 03:15:52,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775530094] [2022-12-14 03:15:52,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 03:15:52,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 03:15:52,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:15:52,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 03:15:52,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 03:15:52,131 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:15:52,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:15:52,161 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2022-12-14 03:15:52,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 03:15:52,162 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-12-14 03:15:52,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:15:52,162 INFO L225 Difference]: With dead ends: 29 [2022-12-14 03:15:52,162 INFO L226 Difference]: Without dead ends: 29 [2022-12-14 03:15:52,162 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 03:15:52,164 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 26 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 03:15:52,165 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 13 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 03:15:52,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-12-14 03:15:52,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-12-14 03:15:52,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 28 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:15:52,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2022-12-14 03:15:52,168 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 3 [2022-12-14 03:15:52,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:15:52,169 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2022-12-14 03:15:52,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:15:52,169 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2022-12-14 03:15:52,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-12-14 03:15:52,170 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:15:52,170 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-12-14 03:15:52,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 03:15:52,170 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2022-12-14 03:15:52,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:15:52,171 INFO L85 PathProgramCache]: Analyzing trace with hash 111799, now seen corresponding path program 1 times [2022-12-14 03:15:52,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:15:52,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184482963] [2022-12-14 03:15:52,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:15:52,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:15:52,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:15:52,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 03:15:52,289 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:15:52,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184482963] [2022-12-14 03:15:52,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184482963] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 03:15:52,290 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 03:15:52,290 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 03:15:52,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420765808] [2022-12-14 03:15:52,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 03:15:52,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 03:15:52,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:15:52,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 03:15:52,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 03:15:52,292 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:15:52,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:15:52,324 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2022-12-14 03:15:52,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 03:15:52,325 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-12-14 03:15:52,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:15:52,325 INFO L225 Difference]: With dead ends: 30 [2022-12-14 03:15:52,325 INFO L226 Difference]: Without dead ends: 30 [2022-12-14 03:15:52,326 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 03:15:52,327 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 0 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 03:15:52,327 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 34 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 03:15:52,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-12-14 03:15:52,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-12-14 03:15:52,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 29 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:15:52,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2022-12-14 03:15:52,331 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 3 [2022-12-14 03:15:52,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:15:52,331 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2022-12-14 03:15:52,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:15:52,331 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2022-12-14 03:15:52,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-12-14 03:15:52,332 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:15:52,332 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-12-14 03:15:52,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 03:15:52,332 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2022-12-14 03:15:52,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:15:52,333 INFO L85 PathProgramCache]: Analyzing trace with hash 107509825, now seen corresponding path program 1 times [2022-12-14 03:15:52,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:15:52,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617053275] [2022-12-14 03:15:52,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:15:52,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:15:52,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:15:52,377 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 03:15:52,377 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:15:52,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617053275] [2022-12-14 03:15:52,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617053275] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 03:15:52,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565962250] [2022-12-14 03:15:52,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:15:52,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:15:52,378 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62aefa12-4775-4111-8d73-1e190db303d8/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 03:15:52,379 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62aefa12-4775-4111-8d73-1e190db303d8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 03:15:52,380 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62aefa12-4775-4111-8d73-1e190db303d8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 03:15:52,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:15:52,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 03:15:52,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 03:15:52,456 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 03:15:52,456 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 03:15:52,473 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 03:15:52,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [565962250] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 03:15:52,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [557563847] [2022-12-14 03:15:52,489 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2022-12-14 03:15:52,489 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 03:15:52,492 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 03:15:52,496 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 03:15:52,497 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 03:15:52,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:15:52,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:15:52,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:15:52,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:15:52,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:15:52,571 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2022-12-14 03:15:52,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:15:52,660 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-12-14 03:15:52,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:15:52,796 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 03:15:52,824 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-12-14 03:15:52,824 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 249 treesize of output 248 [2022-12-14 03:15:52,981 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 03:15:52,999 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 03:15:53,042 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 03:15:53,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [557563847] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 03:15:53,282 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 03:15:53,282 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3, 3] total 9 [2022-12-14 03:15:53,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004271134] [2022-12-14 03:15:53,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 03:15:53,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 03:15:53,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:15:53,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 03:15:53,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2022-12-14 03:15:53,284 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand has 5 states, 4 states have (on average 1.25) internal successors, (5), 4 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) [2022-12-14 03:15:53,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:15:53,571 INFO L93 Difference]: Finished difference Result 48 states and 52 transitions. [2022-12-14 03:15:53,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 03:15:53,572 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.25) internal successors, (5), 4 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 [2022-12-14 03:15:53,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:15:53,572 INFO L225 Difference]: With dead ends: 48 [2022-12-14 03:15:53,572 INFO L226 Difference]: Without dead ends: 48 [2022-12-14 03:15:53,573 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-12-14 03:15:53,574 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 19 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 03:15:53,574 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 35 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 03:15:53,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-12-14 03:15:53,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 38. [2022-12-14 03:15:53,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 37 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:15:53,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2022-12-14 03:15:53,578 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 5 [2022-12-14 03:15:53,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:15:53,578 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2022-12-14 03:15:53,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.25) internal successors, (5), 4 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) [2022-12-14 03:15:53,579 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2022-12-14 03:15:53,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-12-14 03:15:53,579 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:15:53,579 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1] [2022-12-14 03:15:53,584 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62aefa12-4775-4111-8d73-1e190db303d8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 03:15:53,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62aefa12-4775-4111-8d73-1e190db303d8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:15:53,781 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2022-12-14 03:15:53,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:15:53,783 INFO L85 PathProgramCache]: Analyzing trace with hash 107507393, now seen corresponding path program 1 times [2022-12-14 03:15:53,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:15:53,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591307940] [2022-12-14 03:15:53,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:15:53,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:15:53,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:15:53,994 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 03:15:53,994 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:15:53,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591307940] [2022-12-14 03:15:53,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591307940] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 03:15:53,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451548794] [2022-12-14 03:15:53,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:15:53,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:15:53,995 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62aefa12-4775-4111-8d73-1e190db303d8/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 03:15:53,996 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62aefa12-4775-4111-8d73-1e190db303d8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 03:15:53,997 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62aefa12-4775-4111-8d73-1e190db303d8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 03:15:54,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:15:54,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-14 03:15:54,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 03:15:54,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:15:54,050 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 [2022-12-14 03:15:54,057 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 [2022-12-14 03:15:54,087 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 03:15:54,087 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 03:15:54,123 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 03:15:54,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1451548794] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 03:15:54,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [981121552] [2022-12-14 03:15:54,126 INFO L159 IcfgInterpreter]: Started Sifa with 4 locations of interest [2022-12-14 03:15:54,126 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 03:15:54,126 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 03:15:54,126 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 03:15:54,126 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 03:15:54,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:15:54,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:15:54,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:15:54,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:15:54,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:15:54,147 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2022-12-14 03:15:54,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:15:54,175 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-12-14 03:15:54,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:15:54,251 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 03:15:54,275 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-12-14 03:15:54,276 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 249 treesize of output 248 [2022-12-14 03:15:54,403 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 03:15:54,422 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 [2022-12-14 03:15:54,431 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 03:15:54,659 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '419#(and (<= |ULTIMATE.start_main_#t~nondet2#1| 2147483647) (= |ULTIMATE.start_main_~#dst~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#src~0#1.base|) (= |ULTIMATE.start_main_~#src~0#1.offset| 0) (<= 0 (+ 2147483648 |ULTIMATE.start_main_#t~nondet2#1|)) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#dst~0#1.base|) (= |#NULL.offset| 0) (not (<= (+ |ULTIMATE.start_main_~#src~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4) 4) (select |#length| |ULTIMATE.start_main_~#src~0#1.base|))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 03:15:54,659 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 03:15:54,659 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 03:15:54,659 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2022-12-14 03:15:54,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853902366] [2022-12-14 03:15:54,659 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 03:15:54,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 03:15:54,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:15:54,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 03:15:54,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-12-14 03:15:54,660 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 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) [2022-12-14 03:15:54,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:15:54,739 INFO L93 Difference]: Finished difference Result 42 states and 50 transitions. [2022-12-14 03:15:54,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 03:15:54,739 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 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 5 [2022-12-14 03:15:54,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:15:54,740 INFO L225 Difference]: With dead ends: 42 [2022-12-14 03:15:54,740 INFO L226 Difference]: Without dead ends: 42 [2022-12-14 03:15:54,740 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-12-14 03:15:54,741 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 14 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 03:15:54,741 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 54 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 03:15:54,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-12-14 03:15:54,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 38. [2022-12-14 03:15:54,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 29 states have (on average 1.4827586206896552) internal successors, (43), 37 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:15:54,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2022-12-14 03:15:54,744 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 5 [2022-12-14 03:15:54,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:15:54,745 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2022-12-14 03:15:54,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 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) [2022-12-14 03:15:54,745 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2022-12-14 03:15:54,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-12-14 03:15:54,745 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:15:54,746 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2022-12-14 03:15:54,750 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62aefa12-4775-4111-8d73-1e190db303d8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 03:15:54,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62aefa12-4775-4111-8d73-1e190db303d8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:15:54,948 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2022-12-14 03:15:54,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:15:54,950 INFO L85 PathProgramCache]: Analyzing trace with hash 923771867, now seen corresponding path program 1 times [2022-12-14 03:15:54,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:15:54,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025709394] [2022-12-14 03:15:54,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:15:54,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:15:54,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:15:55,097 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 03:15:55,097 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:15:55,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025709394] [2022-12-14 03:15:55,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025709394] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 03:15:55,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792554721] [2022-12-14 03:15:55,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:15:55,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:15:55,098 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62aefa12-4775-4111-8d73-1e190db303d8/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 03:15:55,099 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62aefa12-4775-4111-8d73-1e190db303d8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 03:15:55,100 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62aefa12-4775-4111-8d73-1e190db303d8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 03:15:55,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:15:55,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 03:15:55,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 03:15:55,154 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 03:15:55,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 03:15:55,183 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 03:15:55,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [792554721] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 03:15:55,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1632392319] [2022-12-14 03:15:55,186 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-12-14 03:15:55,186 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 03:15:55,186 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 03:15:55,187 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 03:15:55,187 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 03:15:55,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:15:55,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:15:55,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:15:55,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:15:55,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:15:55,210 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2022-12-14 03:15:55,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:15:55,240 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-12-14 03:15:55,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:15:55,323 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 03:15:55,342 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-12-14 03:15:55,342 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 249 treesize of output 248 [2022-12-14 03:15:55,456 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 03:15:55,469 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 03:15:55,536 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 03:15:55,968 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '567#(and (= |ULTIMATE.start_main_~#dst~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (= (select |#valid| |ULTIMATE.start_main_~#src~0#1.base|) 1) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) (+ |ULTIMATE.start_main_~#src~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) 0)) (= |ULTIMATE.start_main_#t~mem4#1| (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) (+ |ULTIMATE.start_main_~#src~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4)))) (<= 0 |ULTIMATE.start_main_~#src~0#1.base|) (= |ULTIMATE.start_main_~#src~0#1.offset| 0) (exists ((|v_ULTIMATE.start_main_~i~0#1_71| Int)) (and (<= (+ |ULTIMATE.start_main_~#src~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_71| 4)) (select |#length| |ULTIMATE.start_main_~#src~0#1.base|)) (<= 0 (+ 2147483648 (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) (+ |ULTIMATE.start_main_~#src~0#1.offset| (- 4) (* |v_ULTIMATE.start_main_~i~0#1_71| 4))))) (<= 100000 |v_ULTIMATE.start_main_~i~0#1_71|) (<= 4 (+ |ULTIMATE.start_main_~#src~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_71| 4))) (<= (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) (+ |ULTIMATE.start_main_~#src~0#1.offset| (- 4) (* |v_ULTIMATE.start_main_~i~0#1_71| 4))) 2147483647))) (<= 0 |ULTIMATE.start_main_~#dst~0#1.base|) (= |#NULL.offset| 0) (not (= (select |#valid| |ULTIMATE.start_main_~#dst~0#1.base|) 1)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 03:15:55,968 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 03:15:55,968 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 03:15:55,968 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2022-12-14 03:15:55,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568119135] [2022-12-14 03:15:55,969 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 03:15:55,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-14 03:15:55,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:15:55,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-14 03:15:55,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=148, Unknown=0, NotChecked=0, Total=240 [2022-12-14 03:15:55,970 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:15:56,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:15:56,093 INFO L93 Difference]: Finished difference Result 170 states and 178 transitions. [2022-12-14 03:15:56,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 03:15:56,093 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 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 [2022-12-14 03:15:56,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:15:56,095 INFO L225 Difference]: With dead ends: 170 [2022-12-14 03:15:56,096 INFO L226 Difference]: Without dead ends: 170 [2022-12-14 03:15:56,096 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=92, Invalid=148, Unknown=0, NotChecked=0, Total=240 [2022-12-14 03:15:56,097 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 202 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 03:15:56,097 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [202 Valid, 89 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 03:15:56,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-12-14 03:15:56,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 41. [2022-12-14 03:15:56,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 32 states have (on average 1.40625) internal successors, (45), 40 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:15:56,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2022-12-14 03:15:56,103 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 10 [2022-12-14 03:15:56,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:15:56,103 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2022-12-14 03:15:56,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:15:56,103 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2022-12-14 03:15:56,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-14 03:15:56,103 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:15:56,103 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 1, 1] [2022-12-14 03:15:56,108 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62aefa12-4775-4111-8d73-1e190db303d8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 03:15:56,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62aefa12-4775-4111-8d73-1e190db303d8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:15:56,304 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2022-12-14 03:15:56,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:15:56,305 INFO L85 PathProgramCache]: Analyzing trace with hash 687930847, now seen corresponding path program 2 times [2022-12-14 03:15:56,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:15:56,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177940247] [2022-12-14 03:15:56,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:15:56,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:15:56,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:15:56,533 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 03:15:56,533 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:15:56,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177940247] [2022-12-14 03:15:56,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177940247] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 03:15:56,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414831515] [2022-12-14 03:15:56,533 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 03:15:56,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:15:56,534 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62aefa12-4775-4111-8d73-1e190db303d8/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 03:15:56,534 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62aefa12-4775-4111-8d73-1e190db303d8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 03:15:56,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62aefa12-4775-4111-8d73-1e190db303d8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 03:15:56,571 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-14 03:15:56,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 03:15:56,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 03:15:56,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 03:15:56,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:15:56,583 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-12-14 03:15:56,586 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 18 treesize of output 16 [2022-12-14 03:15:56,647 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 03:15:56,647 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 03:15:56,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414831515] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 03:15:56,647 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 03:15:56,648 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 8 [2022-12-14 03:15:56,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229976367] [2022-12-14 03:15:56,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 03:15:56,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 03:15:56,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:15:56,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 03:15:56,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-12-14 03:15:56,649 INFO L87 Difference]: Start difference. First operand 41 states and 45 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) [2022-12-14 03:15:56,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:15:56,681 INFO L93 Difference]: Finished difference Result 40 states and 43 transitions. [2022-12-14 03:15:56,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 03:15:56,681 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 11 [2022-12-14 03:15:56,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:15:56,682 INFO L225 Difference]: With dead ends: 40 [2022-12-14 03:15:56,682 INFO L226 Difference]: Without dead ends: 40 [2022-12-14 03:15:56,682 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-12-14 03:15:56,683 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 22 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 03:15:56,683 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 32 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 03:15:56,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-12-14 03:15:56,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2022-12-14 03:15:56,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 32 states have (on average 1.34375) internal successors, (43), 39 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:15:56,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2022-12-14 03:15:56,687 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 11 [2022-12-14 03:15:56,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:15:56,687 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2022-12-14 03:15:56,687 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) [2022-12-14 03:15:56,687 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2022-12-14 03:15:56,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-12-14 03:15:56,688 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:15:56,688 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1] [2022-12-14 03:15:56,692 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62aefa12-4775-4111-8d73-1e190db303d8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 03:15:56,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62aefa12-4775-4111-8d73-1e190db303d8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:15:56,889 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2022-12-14 03:15:56,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:15:56,890 INFO L85 PathProgramCache]: Analyzing trace with hash 841694643, now seen corresponding path program 2 times [2022-12-14 03:15:56,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:15:56,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246122083] [2022-12-14 03:15:56,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:15:56,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:15:56,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:15:57,069 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 03:15:57,069 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:15:57,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246122083] [2022-12-14 03:15:57,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246122083] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 03:15:57,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897004699] [2022-12-14 03:15:57,070 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 03:15:57,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:15:57,070 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62aefa12-4775-4111-8d73-1e190db303d8/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 03:15:57,071 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62aefa12-4775-4111-8d73-1e190db303d8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 03:15:57,072 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62aefa12-4775-4111-8d73-1e190db303d8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 03:15:57,113 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-12-14 03:15:57,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 03:15:57,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 03:15:57,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 03:15:57,124 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 03:15:57,124 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-12-14 03:15:57,145 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-12-14 03:15:57,146 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 03:15:57,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [897004699] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 03:15:57,146 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 03:15:57,146 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [8] total 9 [2022-12-14 03:15:57,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474066757] [2022-12-14 03:15:57,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 03:15:57,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 03:15:57,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:15:57,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 03:15:57,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-12-14 03:15:57,147 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:15:57,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:15:57,161 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2022-12-14 03:15:57,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 03:15:57,161 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-12-14 03:15:57,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:15:57,162 INFO L225 Difference]: With dead ends: 38 [2022-12-14 03:15:57,162 INFO L226 Difference]: Without dead ends: 38 [2022-12-14 03:15:57,162 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-12-14 03:15:57,163 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 16 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 03:15:57,163 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 13 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 03:15:57,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-12-14 03:15:57,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-12-14 03:15:57,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 32 states have (on average 1.28125) internal successors, (41), 37 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:15:57,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2022-12-14 03:15:57,165 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 18 [2022-12-14 03:15:57,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:15:57,166 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2022-12-14 03:15:57,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:15:57,166 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2022-12-14 03:15:57,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-12-14 03:15:57,166 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:15:57,167 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1] [2022-12-14 03:15:57,171 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62aefa12-4775-4111-8d73-1e190db303d8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 03:15:57,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62aefa12-4775-4111-8d73-1e190db303d8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-12-14 03:15:57,369 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2022-12-14 03:15:57,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:15:57,370 INFO L85 PathProgramCache]: Analyzing trace with hash 841694644, now seen corresponding path program 1 times [2022-12-14 03:15:57,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:15:57,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393428760] [2022-12-14 03:15:57,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:15:57,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:15:57,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:15:57,555 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 03:15:57,555 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:15:57,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393428760] [2022-12-14 03:15:57,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393428760] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 03:15:57,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324685338] [2022-12-14 03:15:57,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:15:57,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:15:57,556 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62aefa12-4775-4111-8d73-1e190db303d8/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 03:15:57,557 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62aefa12-4775-4111-8d73-1e190db303d8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 03:15:57,569 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62aefa12-4775-4111-8d73-1e190db303d8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 03:15:57,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:15:57,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 03:15:57,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 03:15:57,636 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 03:15:57,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 03:15:57,698 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 03:15:57,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [324685338] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 03:15:57,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [97422869] [2022-12-14 03:15:57,700 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-12-14 03:15:57,700 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 03:15:57,700 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 03:15:57,700 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 03:15:57,700 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 03:15:57,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:15:57,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:15:57,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:15:57,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:15:57,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:15:57,718 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2022-12-14 03:15:57,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:15:57,742 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-12-14 03:15:57,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:15:57,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:15:57,813 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-12-14 03:15:57,813 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 259 treesize of output 247 [2022-12-14 03:15:57,889 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 03:15:57,912 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 [2022-12-14 03:15:57,938 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 03:15:58,179 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1161#(and (= |ULTIMATE.start_main_~#dst~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (= (select |#valid| |ULTIMATE.start_main_~#src~0#1.base|) 1) (<= (+ |ULTIMATE.start_main_~#src~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4) 4) (select |#length| |ULTIMATE.start_main_~#src~0#1.base|)) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) (+ |ULTIMATE.start_main_~#src~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) 0)) (= |ULTIMATE.start_main_#t~mem4#1| (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) (+ |ULTIMATE.start_main_~#src~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4)))) (<= 0 |ULTIMATE.start_main_~#src~0#1.base|) (= |ULTIMATE.start_main_~#src~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#dst~0#1.base|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (not (<= (+ |ULTIMATE.start_main_~#dst~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4) 4) (select |#length| |ULTIMATE.start_main_~#dst~0#1.base|))) (= |#NULL.base| 0))' at error location [2022-12-14 03:15:58,180 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 03:15:58,180 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 03:15:58,180 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-12-14 03:15:58,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416083675] [2022-12-14 03:15:58,180 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 03:15:58,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-14 03:15:58,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:15:58,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-14 03:15:58,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=314, Unknown=0, NotChecked=0, Total=552 [2022-12-14 03:15:58,181 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 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) [2022-12-14 03:15:58,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:15:58,423 INFO L93 Difference]: Finished difference Result 330 states and 346 transitions. [2022-12-14 03:15:58,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-14 03:15:58,424 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 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 18 [2022-12-14 03:15:58,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:15:58,425 INFO L225 Difference]: With dead ends: 330 [2022-12-14 03:15:58,425 INFO L226 Difference]: Without dead ends: 330 [2022-12-14 03:15:58,425 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=238, Invalid=314, Unknown=0, NotChecked=0, Total=552 [2022-12-14 03:15:58,426 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 613 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 613 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 03:15:58,426 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [613 Valid, 145 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 03:15:58,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2022-12-14 03:15:58,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 54. [2022-12-14 03:15:58,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 48 states have (on average 1.1875) internal successors, (57), 53 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) [2022-12-14 03:15:58,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 57 transitions. [2022-12-14 03:15:58,433 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 57 transitions. Word has length 18 [2022-12-14 03:15:58,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:15:58,433 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 57 transitions. [2022-12-14 03:15:58,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 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) [2022-12-14 03:15:58,433 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 57 transitions. [2022-12-14 03:15:58,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-12-14 03:15:58,434 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:15:58,434 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1] [2022-12-14 03:15:58,439 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62aefa12-4775-4111-8d73-1e190db303d8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 03:15:58,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62aefa12-4775-4111-8d73-1e190db303d8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:15:58,634 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2022-12-14 03:15:58,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:15:58,635 INFO L85 PathProgramCache]: Analyzing trace with hash -596088476, now seen corresponding path program 2 times [2022-12-14 03:15:58,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:15:58,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316534869] [2022-12-14 03:15:58,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:15:58,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:15:58,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:15:58,882 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 03:15:58,883 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:15:58,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316534869] [2022-12-14 03:15:58,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316534869] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 03:15:58,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937441787] [2022-12-14 03:15:58,883 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 03:15:58,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:15:58,883 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62aefa12-4775-4111-8d73-1e190db303d8/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 03:15:58,884 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62aefa12-4775-4111-8d73-1e190db303d8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 03:15:58,885 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62aefa12-4775-4111-8d73-1e190db303d8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 03:15:58,932 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-12-14 03:15:58,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 03:15:58,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-14 03:15:58,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 03:15:58,946 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 03:15:58,946 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-12-14 03:15:59,048 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2022-12-14 03:15:59,049 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 03:15:59,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937441787] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 03:15:59,049 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 03:15:59,049 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [16] total 18 [2022-12-14 03:15:59,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909169718] [2022-12-14 03:15:59,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 03:15:59,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 03:15:59,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:15:59,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 03:15:59,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=186, Unknown=0, NotChecked=0, Total=342 [2022-12-14 03:15:59,050 INFO L87 Difference]: Start difference. First operand 54 states and 57 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:15:59,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:15:59,079 INFO L93 Difference]: Finished difference Result 66 states and 70 transitions. [2022-12-14 03:15:59,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 03:15:59,079 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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 34 [2022-12-14 03:15:59,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:15:59,080 INFO L225 Difference]: With dead ends: 66 [2022-12-14 03:15:59,080 INFO L226 Difference]: Without dead ends: 66 [2022-12-14 03:15:59,080 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=156, Invalid=186, Unknown=0, NotChecked=0, Total=342 [2022-12-14 03:15:59,081 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 43 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 03:15:59,081 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 17 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 03:15:59,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-12-14 03:15:59,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 59. [2022-12-14 03:15:59,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 53 states have (on average 1.2075471698113207) internal successors, (64), 58 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:15:59,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 64 transitions. [2022-12-14 03:15:59,084 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 64 transitions. Word has length 34 [2022-12-14 03:15:59,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:15:59,085 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 64 transitions. [2022-12-14 03:15:59,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:15:59,085 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 64 transitions. [2022-12-14 03:15:59,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-12-14 03:15:59,085 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:15:59,085 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 03:15:59,091 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62aefa12-4775-4111-8d73-1e190db303d8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 03:15:59,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62aefa12-4775-4111-8d73-1e190db303d8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-14 03:15:59,287 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2022-12-14 03:15:59,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:15:59,287 INFO L85 PathProgramCache]: Analyzing trace with hash -1298872181, now seen corresponding path program 1 times [2022-12-14 03:15:59,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:15:59,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466189121] [2022-12-14 03:15:59,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:15:59,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:15:59,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:15:59,606 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 03:15:59,607 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:15:59,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466189121] [2022-12-14 03:15:59,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466189121] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 03:15:59,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600148305] [2022-12-14 03:15:59,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:15:59,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:15:59,607 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62aefa12-4775-4111-8d73-1e190db303d8/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 03:15:59,608 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62aefa12-4775-4111-8d73-1e190db303d8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 03:15:59,609 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62aefa12-4775-4111-8d73-1e190db303d8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 03:15:59,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:15:59,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-14 03:15:59,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 03:15:59,706 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 03:15:59,706 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 03:15:59,934 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 03:15:59,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600148305] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 03:15:59,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [594988772] [2022-12-14 03:15:59,935 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-12-14 03:15:59,936 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 03:15:59,936 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 03:15:59,936 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 03:15:59,936 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 03:15:59,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:15:59,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:15:59,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:15:59,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:15:59,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:15:59,952 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2022-12-14 03:15:59,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:15:59,973 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-12-14 03:16:00,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:16:00,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:16:00,028 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-12-14 03:16:00,028 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 259 treesize of output 247 [2022-12-14 03:16:00,080 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 03:16:00,105 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 03:16:00,142 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 03:16:00,142 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2022-12-14 03:16:00,201 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 03:16:00,202 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 03:16:00,230 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-12-14 03:16:00,230 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 118 treesize of output 115 [2022-12-14 03:16:00,293 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 03:16:00,301 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 03:16:00,301 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 03:16:00,318 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 03:16:00,326 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 03:16:00,326 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 03:16:00,340 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 03:16:00,855 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2032#(and (or (= |ULTIMATE.start_main_~i~0#1| 0) (and (<= (+ |ULTIMATE.start_main_~#dst~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4)) (select |#length| |ULTIMATE.start_main_~#dst~0#1.base|)) (= (select |#valid| |ULTIMATE.start_main_~#dst~0#1.base|) 1) (= (select |#valid| |ULTIMATE.start_main_~#src~0#1.base|) 1) (<= (+ |ULTIMATE.start_main_~#src~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4)) (select |#length| |ULTIMATE.start_main_~#src~0#1.base|)) (= (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) (+ |ULTIMATE.start_main_~#src~0#1.offset| (- 4) (* |ULTIMATE.start_main_~i~0#1| 4))) (select (select |#memory_int| |ULTIMATE.start_main_~#dst~0#1.base|) (+ |ULTIMATE.start_main_~#dst~0#1.offset| (- 4) (* |ULTIMATE.start_main_~i~0#1| 4)))))) (<= 0 |#NULL.base|) (<= |ULTIMATE.start_main_~#src~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#src~0#1.base|) (<= 0 |ULTIMATE.start_main_~#src~0#1.offset|) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#dst~0#1.offset|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |#NULL.base| 0) (<= 0 |ULTIMATE.start_main_~#dst~0#1.base|) (<= |ULTIMATE.start_main_~#dst~0#1.offset| 0) (not (<= (+ |ULTIMATE.start_main_~#src~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4) 4) (select |#length| |ULTIMATE.start_main_~#src~0#1.base|))) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|))' at error location [2022-12-14 03:16:00,855 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 03:16:00,855 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 03:16:00,855 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 32 [2022-12-14 03:16:00,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914657086] [2022-12-14 03:16:00,856 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 03:16:00,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-12-14 03:16:00,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:16:00,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-12-14 03:16:00,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=543, Invalid=863, Unknown=0, NotChecked=0, Total=1406 [2022-12-14 03:16:00,858 INFO L87 Difference]: Start difference. First operand 59 states and 64 transitions. Second operand has 33 states, 33 states have (on average 2.0606060606060606) internal successors, (68), 32 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:16:01,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:16:01,371 INFO L93 Difference]: Finished difference Result 680 states and 712 transitions. [2022-12-14 03:16:01,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-12-14 03:16:01,371 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0606060606060606) internal successors, (68), 32 states have internal predecessors, (68), 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 35 [2022-12-14 03:16:01,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:16:01,372 INFO L225 Difference]: With dead ends: 680 [2022-12-14 03:16:01,373 INFO L226 Difference]: Without dead ends: 680 [2022-12-14 03:16:01,373 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 81 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=543, Invalid=863, Unknown=0, NotChecked=0, Total=1406 [2022-12-14 03:16:01,373 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 1799 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 414 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1799 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 818 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 414 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 03:16:01,373 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1799 Valid, 280 Invalid, 818 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [414 Valid, 404 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 03:16:01,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 680 states. [2022-12-14 03:16:01,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 680 to 91. [2022-12-14 03:16:01,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 85 states have (on average 1.1294117647058823) internal successors, (96), 90 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:16:01,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 96 transitions. [2022-12-14 03:16:01,378 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 96 transitions. Word has length 35 [2022-12-14 03:16:01,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:16:01,378 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 96 transitions. [2022-12-14 03:16:01,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.0606060606060606) internal successors, (68), 32 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:16:01,378 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 96 transitions. [2022-12-14 03:16:01,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-12-14 03:16:01,379 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:16:01,379 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 03:16:01,384 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62aefa12-4775-4111-8d73-1e190db303d8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-14 03:16:01,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62aefa12-4775-4111-8d73-1e190db303d8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:16:01,581 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2022-12-14 03:16:01,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:16:01,582 INFO L85 PathProgramCache]: Analyzing trace with hash -532054741, now seen corresponding path program 2 times [2022-12-14 03:16:01,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:16:01,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252571909] [2022-12-14 03:16:01,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:16:01,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:16:01,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:16:02,217 INFO L134 CoverageAnalysis]: Checked inductivity of 901 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 03:16:02,217 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:16:02,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252571909] [2022-12-14 03:16:02,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252571909] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 03:16:02,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494353248] [2022-12-14 03:16:02,217 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 03:16:02,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:16:02,218 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62aefa12-4775-4111-8d73-1e190db303d8/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 03:16:02,218 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62aefa12-4775-4111-8d73-1e190db303d8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 03:16:02,219 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62aefa12-4775-4111-8d73-1e190db303d8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 03:16:02,279 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-14 03:16:02,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 03:16:02,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 03:16:02,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 03:16:02,390 INFO L134 CoverageAnalysis]: Checked inductivity of 901 backedges. 30 proven. 1 refuted. 0 times theorem prover too weak. 870 trivial. 0 not checked. [2022-12-14 03:16:02,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 03:16:02,481 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 7 treesize of output 5 [2022-12-14 03:16:02,533 INFO L134 CoverageAnalysis]: Checked inductivity of 901 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 870 trivial. 0 not checked. [2022-12-14 03:16:02,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [494353248] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 03:16:02,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1354009938] [2022-12-14 03:16:02,535 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-12-14 03:16:02,535 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 03:16:02,535 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 03:16:02,535 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 03:16:02,536 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 03:16:02,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:16:02,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:16:02,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:16:02,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:16:02,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:16:02,552 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2022-12-14 03:16:02,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:16:02,573 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-12-14 03:16:02,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:16:02,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:16:02,634 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-12-14 03:16:02,635 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 259 treesize of output 247 [2022-12-14 03:16:02,693 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 03:16:02,715 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 03:16:02,749 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 03:16:02,749 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2022-12-14 03:16:02,786 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 03:16:02,787 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 03:16:02,829 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-12-14 03:16:02,830 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 118 treesize of output 115 [2022-12-14 03:16:02,886 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 03:16:02,893 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 03:16:02,894 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 03:16:02,908 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 03:16:02,916 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 03:16:02,916 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 03:16:02,939 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 03:16:03,501 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3245#(and (or (= |ULTIMATE.start_main_~i~0#1| 0) (and (<= (+ |ULTIMATE.start_main_~#dst~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4)) (select |#length| |ULTIMATE.start_main_~#dst~0#1.base|)) (= (select |#valid| |ULTIMATE.start_main_~#dst~0#1.base|) 1) (= (select |#valid| |ULTIMATE.start_main_~#src~0#1.base|) 1) (<= (+ |ULTIMATE.start_main_~#src~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4)) (select |#length| |ULTIMATE.start_main_~#src~0#1.base|)) (= (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) (+ |ULTIMATE.start_main_~#src~0#1.offset| (- 4) (* |ULTIMATE.start_main_~i~0#1| 4))) (select (select |#memory_int| |ULTIMATE.start_main_~#dst~0#1.base|) (+ |ULTIMATE.start_main_~#dst~0#1.offset| (- 4) (* |ULTIMATE.start_main_~i~0#1| 4)))))) (<= 0 |#NULL.base|) (<= |ULTIMATE.start_main_~#src~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#src~0#1.base|) (<= 0 |ULTIMATE.start_main_~#src~0#1.offset|) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#dst~0#1.offset|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |#NULL.base| 0) (<= 0 |ULTIMATE.start_main_~#dst~0#1.base|) (<= |ULTIMATE.start_main_~#dst~0#1.offset| 0) (not (<= (+ |ULTIMATE.start_main_~#src~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4) 4) (select |#length| |ULTIMATE.start_main_~#src~0#1.base|))) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|))' at error location [2022-12-14 03:16:03,502 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 03:16:03,502 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 03:16:03,502 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 4, 4] total 40 [2022-12-14 03:16:03,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829125370] [2022-12-14 03:16:03,502 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 03:16:03,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-12-14 03:16:03,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:16:03,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-12-14 03:16:03,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=682, Invalid=1388, Unknown=0, NotChecked=0, Total=2070 [2022-12-14 03:16:03,505 INFO L87 Difference]: Start difference. First operand 91 states and 96 transitions. Second operand has 41 states, 41 states have (on average 2.1219512195121952) internal successors, (87), 40 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:16:05,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:16:05,826 INFO L93 Difference]: Finished difference Result 730 states and 766 transitions. [2022-12-14 03:16:05,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-12-14 03:16:05,826 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1219512195121952) internal successors, (87), 40 states have internal predecessors, (87), 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 67 [2022-12-14 03:16:05,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:16:05,827 INFO L225 Difference]: With dead ends: 730 [2022-12-14 03:16:05,828 INFO L226 Difference]: Without dead ends: 730 [2022-12-14 03:16:05,829 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 185 SyntacticMatches, 2 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2942 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3733, Invalid=8257, Unknown=0, NotChecked=0, Total=11990 [2022-12-14 03:16:05,829 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 3088 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 534 mSolverCounterSat, 382 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3088 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 916 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 382 IncrementalHoareTripleChecker+Valid, 534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 03:16:05,830 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3088 Valid, 295 Invalid, 916 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [382 Valid, 534 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 03:16:05,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 730 states. [2022-12-14 03:16:05,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 730 to 120. [2022-12-14 03:16:05,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 114 states have (on average 1.2017543859649122) internal successors, (137), 119 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:16:05,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 137 transitions. [2022-12-14 03:16:05,834 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 137 transitions. Word has length 67 [2022-12-14 03:16:05,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:16:05,834 INFO L495 AbstractCegarLoop]: Abstraction has 120 states and 137 transitions. [2022-12-14 03:16:05,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.1219512195121952) internal successors, (87), 40 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:16:05,835 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 137 transitions. [2022-12-14 03:16:05,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-12-14 03:16:05,835 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:16:05,835 INFO L195 NwaCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 03:16:05,840 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62aefa12-4775-4111-8d73-1e190db303d8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-14 03:16:06,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62aefa12-4775-4111-8d73-1e190db303d8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-12-14 03:16:06,037 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2022-12-14 03:16:06,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:16:06,038 INFO L85 PathProgramCache]: Analyzing trace with hash -279830977, now seen corresponding path program 1 times [2022-12-14 03:16:06,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:16:06,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300007725] [2022-12-14 03:16:06,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:16:06,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:16:06,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:16:06,725 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 03:16:06,725 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:16:06,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300007725] [2022-12-14 03:16:06,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300007725] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 03:16:06,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391776057] [2022-12-14 03:16:06,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:16:06,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:16:06,726 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62aefa12-4775-4111-8d73-1e190db303d8/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 03:16:06,726 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62aefa12-4775-4111-8d73-1e190db303d8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 03:16:06,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62aefa12-4775-4111-8d73-1e190db303d8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-14 03:16:06,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:16:06,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 33 conjunts are in the unsatisfiable core [2022-12-14 03:16:06,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 03:16:06,897 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 03:16:06,897 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 03:16:07,789 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 03:16:07,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1391776057] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 03:16:07,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1567760659] [2022-12-14 03:16:07,790 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-12-14 03:16:07,790 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 03:16:07,791 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 03:16:07,791 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 03:16:07,791 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 03:16:07,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:16:07,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:16:07,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:16:07,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:16:07,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:16:07,805 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2022-12-14 03:16:07,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:16:07,822 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-12-14 03:16:07,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:16:07,858 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 03:16:07,880 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-12-14 03:16:07,881 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 249 treesize of output 248 [2022-12-14 03:16:07,947 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 03:16:07,957 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 03:16:08,022 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-12-14 03:16:08,022 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 2 case distinctions, treesize of input 15 treesize of output 14 [2022-12-14 03:16:08,034 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 03:16:08,562 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4715#(and (= |ULTIMATE.start_main_~i~0#1| 0) (not (= |ULTIMATE.start_main_old_#valid#1| |#valid|)) (= |#NULL.offset| 0) (exists ((|v_ULTIMATE.start_main_~i~0#1_242| Int) (|v_ULTIMATE.start_main_~#src~0#1.base_26| Int)) (and (<= 0 |v_ULTIMATE.start_main_~#src~0#1.base_26|) (= (select (select |#memory_int| |v_ULTIMATE.start_main_~#src~0#1.base_26|) (* |ULTIMATE.start_main_~i~0#1| 4)) 0) (<= 4 (* |v_ULTIMATE.start_main_~i~0#1_242| 4)) (<= 4 (select |#length| |v_ULTIMATE.start_main_~#src~0#1.base_26|)) (<= (* |v_ULTIMATE.start_main_~i~0#1_242| 4) (select |#length| |v_ULTIMATE.start_main_~#src~0#1.base_26|)) (= 0 (select (select |#memory_int| |v_ULTIMATE.start_main_~#src~0#1.base_26|) 0)) (<= 0 (+ (select (select |#memory_int| |v_ULTIMATE.start_main_~#src~0#1.base_26|) (+ (* |v_ULTIMATE.start_main_~i~0#1_242| 4) (- 4))) 2147483648)) (not (< |v_ULTIMATE.start_main_~i~0#1_242| 100000)) (<= (select (select |#memory_int| |v_ULTIMATE.start_main_~#src~0#1.base_26|) (+ (* |v_ULTIMATE.start_main_~i~0#1_242| 4) (- 4))) 2147483647) (<= (+ (* |ULTIMATE.start_main_~i~0#1| 4) 4) (select |#length| |v_ULTIMATE.start_main_~#src~0#1.base_26|)) (= (select |#valid| |v_ULTIMATE.start_main_~#src~0#1.base_26|) 0))) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_#res#1| 0) (= |#NULL.base| 0))' at error location [2022-12-14 03:16:08,562 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 03:16:08,562 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 03:16:08,563 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2022-12-14 03:16:08,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946938315] [2022-12-14 03:16:08,563 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 03:16:08,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-12-14 03:16:08,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:16:08,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-12-14 03:16:08,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2622, Invalid=2928, Unknown=0, NotChecked=0, Total=5550 [2022-12-14 03:16:08,565 INFO L87 Difference]: Start difference. First operand 120 states and 137 transitions. Second operand has 67 states, 67 states have (on average 2.0597014925373136) internal successors, (138), 66 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:16:11,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:16:11,132 INFO L93 Difference]: Finished difference Result 1443 states and 1517 transitions. [2022-12-14 03:16:11,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-12-14 03:16:11,132 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 2.0597014925373136) internal successors, (138), 66 states have internal predecessors, (138), 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 [2022-12-14 03:16:11,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:16:11,134 INFO L225 Difference]: With dead ends: 1443 [2022-12-14 03:16:11,135 INFO L226 Difference]: Without dead ends: 1443 [2022-12-14 03:16:11,135 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 169 SyntacticMatches, 2 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1346 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2622, Invalid=2928, Unknown=0, NotChecked=0, Total=5550 [2022-12-14 03:16:11,136 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 4021 mSDsluCounter, 576 mSDsCounter, 0 mSdLazyCounter, 844 mSolverCounterSat, 642 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4021 SdHoareTripleChecker+Valid, 586 SdHoareTripleChecker+Invalid, 1486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 642 IncrementalHoareTripleChecker+Valid, 844 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-12-14 03:16:11,136 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4021 Valid, 586 Invalid, 1486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [642 Valid, 844 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-12-14 03:16:11,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1443 states. [2022-12-14 03:16:11,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1443 to 186. [2022-12-14 03:16:11,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 180 states have (on average 1.1277777777777778) internal successors, (203), 185 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:16:11,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 203 transitions. [2022-12-14 03:16:11,144 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 203 transitions. Word has length 71 [2022-12-14 03:16:11,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:16:11,144 INFO L495 AbstractCegarLoop]: Abstraction has 186 states and 203 transitions. [2022-12-14 03:16:11,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 2.0597014925373136) internal successors, (138), 66 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:16:11,145 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 203 transitions. [2022-12-14 03:16:11,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-12-14 03:16:11,148 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:16:11,148 INFO L195 NwaCegarLoop]: trace histogram [64, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 03:16:11,153 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62aefa12-4775-4111-8d73-1e190db303d8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-14 03:16:11,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62aefa12-4775-4111-8d73-1e190db303d8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:16:11,349 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2022-12-14 03:16:11,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:16:11,350 INFO L85 PathProgramCache]: Analyzing trace with hash -1822331767, now seen corresponding path program 2 times [2022-12-14 03:16:11,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:16:11,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001576461] [2022-12-14 03:16:11,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:16:11,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:16:11,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:16:13,456 INFO L134 CoverageAnalysis]: Checked inductivity of 4096 backedges. 0 proven. 4096 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 03:16:13,456 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:16:13,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001576461] [2022-12-14 03:16:13,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001576461] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 03:16:13,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920666360] [2022-12-14 03:16:13,456 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 03:16:13,456 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:16:13,456 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62aefa12-4775-4111-8d73-1e190db303d8/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 03:16:13,457 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62aefa12-4775-4111-8d73-1e190db303d8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 03:16:13,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62aefa12-4775-4111-8d73-1e190db303d8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-14 03:16:13,530 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-12-14 03:16:13,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 03:16:13,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 03:16:13,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 03:16:14,261 WARN L859 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_847 Int) (v_ArrVal_846 Int) (|v_ULTIMATE.start_main_~#src~0#1.base_27| Int) (v_ArrVal_845 Int) (|v_ULTIMATE.start_main_~#dst~0#1.base_16| Int)) (and (= (select |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#src~0#1.base_27|) 0) (= |c_#valid| (store (store (store (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#src~0#1.base_27| v_ArrVal_847) |v_ULTIMATE.start_main_~#dst~0#1.base_16| v_ArrVal_846) |v_ULTIMATE.start_main_~#src~0#1.base_27| 0) |v_ULTIMATE.start_main_~#dst~0#1.base_16| 0)) (= (select (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#src~0#1.base_27| v_ArrVal_845) |v_ULTIMATE.start_main_~#dst~0#1.base_16|) 0))) is different from true [2022-12-14 03:16:14,264 INFO L134 CoverageAnalysis]: Checked inductivity of 4096 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4096 trivial. 0 not checked. [2022-12-14 03:16:14,264 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 03:16:14,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920666360] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 03:16:14,264 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 03:16:14,264 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [66] total 68 [2022-12-14 03:16:14,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830591082] [2022-12-14 03:16:14,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 03:16:14,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 03:16:14,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:16:14,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 03:16:14,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2215, Invalid=2344, Unknown=1, NotChecked=132, Total=4692 [2022-12-14 03:16:14,266 INFO L87 Difference]: Start difference. First operand 186 states and 203 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:16:14,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:16:14,286 INFO L93 Difference]: Finished difference Result 185 states and 202 transitions. [2022-12-14 03:16:14,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 03:16:14,287 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 137 [2022-12-14 03:16:14,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:16:14,288 INFO L225 Difference]: With dead ends: 185 [2022-12-14 03:16:14,288 INFO L226 Difference]: Without dead ends: 183 [2022-12-14 03:16:14,290 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2215, Invalid=2344, Unknown=1, NotChecked=132, Total=4692 [2022-12-14 03:16:14,291 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 14 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 23 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 03:16:14,291 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 10 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 23 Unchecked, 0.0s Time] [2022-12-14 03:16:14,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-12-14 03:16:14,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 183. [2022-12-14 03:16:14,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 178 states have (on average 1.101123595505618) internal successors, (196), 182 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:16:14,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 196 transitions. [2022-12-14 03:16:14,294 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 196 transitions. Word has length 137 [2022-12-14 03:16:14,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:16:14,294 INFO L495 AbstractCegarLoop]: Abstraction has 183 states and 196 transitions. [2022-12-14 03:16:14,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:16:14,294 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 196 transitions. [2022-12-14 03:16:14,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-12-14 03:16:14,295 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:16:14,295 INFO L195 NwaCegarLoop]: trace histogram [64, 64, 2, 2, 2, 1, 1, 1, 1] [2022-12-14 03:16:14,300 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62aefa12-4775-4111-8d73-1e190db303d8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-14 03:16:14,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62aefa12-4775-4111-8d73-1e190db303d8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-14 03:16:14,496 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2022-12-14 03:16:14,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:16:14,496 INFO L85 PathProgramCache]: Analyzing trace with hash 861527848, now seen corresponding path program 1 times [2022-12-14 03:16:14,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:16:14,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039085968] [2022-12-14 03:16:14,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:16:14,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:16:14,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:16:16,824 INFO L134 CoverageAnalysis]: Checked inductivity of 4100 backedges. 0 proven. 4096 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 03:16:16,824 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:16:16,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039085968] [2022-12-14 03:16:16,824 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039085968] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 03:16:16,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504612157] [2022-12-14 03:16:16,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:16:16,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:16:16,825 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62aefa12-4775-4111-8d73-1e190db303d8/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 03:16:16,825 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62aefa12-4775-4111-8d73-1e190db303d8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 03:16:16,826 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62aefa12-4775-4111-8d73-1e190db303d8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-14 03:16:16,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:16:16,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 920 conjuncts, 66 conjunts are in the unsatisfiable core [2022-12-14 03:16:16,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 03:16:17,098 INFO L134 CoverageAnalysis]: Checked inductivity of 4100 backedges. 0 proven. 4096 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 03:16:17,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 03:16:20,791 INFO L134 CoverageAnalysis]: Checked inductivity of 4100 backedges. 0 proven. 4096 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 03:16:20,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1504612157] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 03:16:20,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [639140224] [2022-12-14 03:16:20,792 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-12-14 03:16:20,792 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 03:16:20,793 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 03:16:20,793 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 03:16:20,793 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 03:16:20,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:16:20,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:16:20,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:16:20,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:16:20,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:16:20,807 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2022-12-14 03:16:20,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:16:20,824 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-12-14 03:16:20,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:16:20,859 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 03:16:20,880 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-12-14 03:16:20,880 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 249 treesize of output 248 [2022-12-14 03:16:20,948 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 03:16:20,956 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 03:16:21,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:16:21,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:16:21,016 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 03:16:21,023 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 03:16:21,023 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 49 [2022-12-14 03:16:21,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:16:21,118 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 03:16:21,118 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 03:16:21,162 INFO L321 Elim1Store]: treesize reduction 225, result has 14.1 percent of original size [2022-12-14 03:16:21,163 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 12 case distinctions, treesize of input 225 treesize of output 191 [2022-12-14 03:16:21,224 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 03:16:21,234 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 03:16:21,235 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 03:16:21,262 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 03:16:21,272 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 03:16:21,272 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 03:16:21,281 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 03:16:22,143 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8152#(and (= |ULTIMATE.start_main_~#dst~0#1.offset| 0) (= (select |#valid| |ULTIMATE.start_main_~#src~0#1.base|) 1) (<= (+ |ULTIMATE.start_main_~#src~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4) 4) (select |#length| |ULTIMATE.start_main_~#src~0#1.base|)) (= |ULTIMATE.start_main_#t~mem4#1| (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) (+ |ULTIMATE.start_main_~#src~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4)))) (<= 0 |ULTIMATE.start_main_~#src~0#1.base|) (= |ULTIMATE.start_main_~#src~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#dst~0#1.base|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (not (<= (+ |ULTIMATE.start_main_~#dst~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4) 4) (select |#length| |ULTIMATE.start_main_~#dst~0#1.base|))) (= |#NULL.base| 0))' at error location [2022-12-14 03:16:22,143 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 03:16:22,143 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 03:16:22,143 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66, 66] total 132 [2022-12-14 03:16:22,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226496780] [2022-12-14 03:16:22,143 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 03:16:22,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 133 states [2022-12-14 03:16:22,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:16:22,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 133 interpolants. [2022-12-14 03:16:22,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8793, Invalid=10113, Unknown=0, NotChecked=0, Total=18906 [2022-12-14 03:16:22,150 INFO L87 Difference]: Start difference. First operand 183 states and 196 transitions. Second operand has 133 states, 133 states have (on average 2.0150375939849625) internal successors, (268), 132 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:16:39,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:16:39,843 INFO L93 Difference]: Finished difference Result 2502 states and 2639 transitions. [2022-12-14 03:16:39,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2022-12-14 03:16:39,843 INFO L78 Accepts]: Start accepts. Automaton has has 133 states, 133 states have (on average 2.0150375939849625) internal successors, (268), 132 states have internal predecessors, (268), 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 138 [2022-12-14 03:16:39,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:16:39,849 INFO L225 Difference]: With dead ends: 2502 [2022-12-14 03:16:39,849 INFO L226 Difference]: Without dead ends: 2502 [2022-12-14 03:16:39,852 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 478 GetRequests, 338 SyntacticMatches, 4 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2014 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=8793, Invalid=10113, Unknown=0, NotChecked=0, Total=18906 [2022-12-14 03:16:39,852 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 7491 mSDsluCounter, 786 mSDsCounter, 0 mSdLazyCounter, 1716 mSolverCounterSat, 1524 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7491 SdHoareTripleChecker+Valid, 793 SdHoareTripleChecker+Invalid, 3240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1524 IncrementalHoareTripleChecker+Valid, 1716 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-12-14 03:16:39,853 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7491 Valid, 793 Invalid, 3240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1524 Valid, 1716 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-12-14 03:16:39,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2502 states. [2022-12-14 03:16:39,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2502 to 315. [2022-12-14 03:16:39,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 310 states have (on average 1.0580645161290323) internal successors, (328), 314 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:16:39,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 328 transitions. [2022-12-14 03:16:39,868 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 328 transitions. Word has length 138 [2022-12-14 03:16:39,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:16:39,868 INFO L495 AbstractCegarLoop]: Abstraction has 315 states and 328 transitions. [2022-12-14 03:16:39,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 133 states, 133 states have (on average 2.0150375939849625) internal successors, (268), 132 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:16:39,869 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 328 transitions. [2022-12-14 03:16:39,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2022-12-14 03:16:39,872 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:16:39,872 INFO L195 NwaCegarLoop]: trace histogram [130, 130, 2, 2, 2, 1, 1, 1, 1] [2022-12-14 03:16:39,877 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62aefa12-4775-4111-8d73-1e190db303d8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-14 03:16:40,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62aefa12-4775-4111-8d73-1e190db303d8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-14 03:16:40,073 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2022-12-14 03:16:40,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:16:40,074 INFO L85 PathProgramCache]: Analyzing trace with hash 1119712404, now seen corresponding path program 2 times [2022-12-14 03:16:40,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:16:40,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987921596] [2022-12-14 03:16:40,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:16:40,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:16:40,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:16:48,528 INFO L134 CoverageAnalysis]: Checked inductivity of 16904 backedges. 0 proven. 16900 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 03:16:48,528 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:16:48,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987921596] [2022-12-14 03:16:48,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987921596] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 03:16:48,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948505339] [2022-12-14 03:16:48,529 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 03:16:48,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:16:48,529 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62aefa12-4775-4111-8d73-1e190db303d8/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 03:16:48,529 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62aefa12-4775-4111-8d73-1e190db303d8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 03:16:48,530 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62aefa12-4775-4111-8d73-1e190db303d8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-14 03:16:48,641 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-12-14 03:16:48,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 03:16:48,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-14 03:16:48,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 03:16:48,659 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 03:16:48,659 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 [2022-12-14 03:16:48,667 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 [2022-12-14 03:16:50,664 INFO L134 CoverageAnalysis]: Checked inductivity of 16904 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 16901 trivial. 0 not checked. [2022-12-14 03:16:50,664 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 03:16:53,781 INFO L134 CoverageAnalysis]: Checked inductivity of 16904 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 16901 trivial. 0 not checked. [2022-12-14 03:16:53,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1948505339] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 03:16:53,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [780540386] [2022-12-14 03:16:53,783 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-12-14 03:16:53,783 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 03:16:53,783 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 03:16:53,784 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 03:16:53,784 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 03:16:53,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:16:53,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:16:53,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:16:53,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:16:53,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:16:53,799 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2022-12-14 03:16:53,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:16:53,817 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-12-14 03:16:53,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:16:53,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:16:53,866 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-12-14 03:16:53,866 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 259 treesize of output 247 [2022-12-14 03:16:53,908 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 03:16:53,924 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 03:16:53,952 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 03:16:53,958 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 03:16:53,958 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 29 [2022-12-14 03:16:53,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:16:53,999 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 03:16:53,999 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 03:16:54,007 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 03:16:54,007 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 133 treesize of output 111 [2022-12-14 03:16:54,033 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 03:16:54,039 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 03:16:54,039 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 03:16:54,052 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 03:16:54,058 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 03:16:54,059 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 03:16:54,064 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 03:16:55,165 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '12725#(and (= |ULTIMATE.start_main_~#dst~0#1.offset| 0) (= (select |#valid| |ULTIMATE.start_main_~#src~0#1.base|) 1) (<= (+ |ULTIMATE.start_main_~#src~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4) 4) (select |#length| |ULTIMATE.start_main_~#src~0#1.base|)) (= |ULTIMATE.start_main_#t~mem4#1| (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) (+ |ULTIMATE.start_main_~#src~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4)))) (<= 0 |ULTIMATE.start_main_~#src~0#1.base|) (= |ULTIMATE.start_main_~#src~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#dst~0#1.base|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (not (<= (+ |ULTIMATE.start_main_~#dst~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4) 4) (select |#length| |ULTIMATE.start_main_~#dst~0#1.base|))) (= |#NULL.base| 0))' at error location [2022-12-14 03:16:55,165 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 03:16:55,165 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 03:16:55,165 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [132, 2, 2] total 136 [2022-12-14 03:16:55,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616421980] [2022-12-14 03:16:55,166 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 03:16:55,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 137 states [2022-12-14 03:16:55,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:16:55,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 137 interpolants. [2022-12-14 03:16:55,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8803, Invalid=11219, Unknown=0, NotChecked=0, Total=20022 [2022-12-14 03:16:55,172 INFO L87 Difference]: Start difference. First operand 315 states and 328 transitions. Second operand has 137 states, 137 states have (on average 2.124087591240876) internal successors, (291), 136 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:16:57,200 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 03:17:39,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:17:39,944 INFO L93 Difference]: Finished difference Result 2266 states and 2403 transitions. [2022-12-14 03:17:39,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 267 states. [2022-12-14 03:17:39,945 INFO L78 Accepts]: Start accepts. Automaton has has 137 states, 137 states have (on average 2.124087591240876) internal successors, (291), 136 states have internal predecessors, (291), 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 270 [2022-12-14 03:17:39,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:17:39,948 INFO L225 Difference]: With dead ends: 2266 [2022-12-14 03:17:39,948 INFO L226 Difference]: Without dead ends: 2266 [2022-12-14 03:17:39,959 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1204 GetRequests, 796 SyntacticMatches, 4 SemanticMatches, 404 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37097 ImplicationChecksByTransitivity, 30.9s TimeCoverageRelationStatistics Valid=53617, Invalid=110813, Unknown=0, NotChecked=0, Total=164430 [2022-12-14 03:17:39,959 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 11000 mSDsluCounter, 786 mSDsCounter, 0 mSdLazyCounter, 1464 mSolverCounterSat, 3099 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11000 SdHoareTripleChecker+Valid, 793 SdHoareTripleChecker+Invalid, 4564 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3099 IncrementalHoareTripleChecker+Valid, 1464 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2022-12-14 03:17:39,959 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11000 Valid, 793 Invalid, 4564 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3099 Valid, 1464 Invalid, 1 Unknown, 0 Unchecked, 6.1s Time] [2022-12-14 03:17:39,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2266 states. [2022-12-14 03:17:39,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2266 to 312. [2022-12-14 03:17:39,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 309 states have (on average 1.035598705501618) internal successors, (320), 311 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:17:39,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 320 transitions. [2022-12-14 03:17:39,967 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 320 transitions. Word has length 270 [2022-12-14 03:17:39,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:17:39,967 INFO L495 AbstractCegarLoop]: Abstraction has 312 states and 320 transitions. [2022-12-14 03:17:39,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 137 states, 137 states have (on average 2.124087591240876) internal successors, (291), 136 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:17:39,967 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 320 transitions. [2022-12-14 03:17:39,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2022-12-14 03:17:39,969 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:17:39,969 INFO L195 NwaCegarLoop]: trace histogram [131, 131, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 03:17:39,975 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62aefa12-4775-4111-8d73-1e190db303d8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-12-14 03:17:40,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62aefa12-4775-4111-8d73-1e190db303d8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-14 03:17:40,171 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2022-12-14 03:17:40,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:17:40,172 INFO L85 PathProgramCache]: Analyzing trace with hash 514028516, now seen corresponding path program 1 times [2022-12-14 03:17:40,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:17:40,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903102421] [2022-12-14 03:17:40,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:17:40,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:17:40,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:17:48,053 INFO L134 CoverageAnalysis]: Checked inductivity of 17161 backedges. 0 proven. 17161 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 03:17:48,054 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:17:48,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903102421] [2022-12-14 03:17:48,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903102421] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 03:17:48,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990085028] [2022-12-14 03:17:48,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:17:48,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:17:48,054 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62aefa12-4775-4111-8d73-1e190db303d8/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 03:17:48,055 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62aefa12-4775-4111-8d73-1e190db303d8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 03:17:48,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62aefa12-4775-4111-8d73-1e190db303d8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-14 03:17:48,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:17:48,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 1790 conjuncts, 133 conjunts are in the unsatisfiable core [2022-12-14 03:17:48,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 03:17:48,512 INFO L134 CoverageAnalysis]: Checked inductivity of 17161 backedges. 0 proven. 17161 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 03:17:48,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 03:18:01,853 INFO L134 CoverageAnalysis]: Checked inductivity of 17161 backedges. 0 proven. 17161 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 03:18:01,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [990085028] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 03:18:01,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1155854399] [2022-12-14 03:18:01,855 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-12-14 03:18:01,855 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 03:18:01,855 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 03:18:01,856 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 03:18:01,856 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 03:18:01,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:18:01,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:18:01,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:18:01,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:18:01,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:18:01,873 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2022-12-14 03:18:01,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:18:01,894 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-12-14 03:18:01,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:18:01,933 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 03:18:01,956 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-12-14 03:18:01,956 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 249 treesize of output 248 [2022-12-14 03:18:02,037 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 03:18:02,049 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 03:18:02,104 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 03:18:02,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1155854399] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 03:18:02,708 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 03:18:02,708 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [133, 133, 133] total 272 [2022-12-14 03:18:02,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257410384] [2022-12-14 03:18:02,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 03:18:02,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 03:18:02,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:18:02,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 03:18:02,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36587, Invalid=37669, Unknown=0, NotChecked=0, Total=74256 [2022-12-14 03:18:02,713 INFO L87 Difference]: Start difference. First operand 312 states and 320 transitions. Second operand has 8 states, 8 states have (on average 1.625) internal successors, (13), 7 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) [2022-12-14 03:18:03,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:18:03,074 INFO L93 Difference]: Finished difference Result 315 states and 322 transitions. [2022-12-14 03:18:03,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 03:18:03,075 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 7 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 273 [2022-12-14 03:18:03,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:18:03,076 INFO L225 Difference]: With dead ends: 315 [2022-12-14 03:18:03,076 INFO L226 Difference]: Without dead ends: 312 [2022-12-14 03:18:03,079 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 951 GetRequests, 678 SyntacticMatches, 1 SemanticMatches, 272 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4092 ImplicationChecksByTransitivity, 18.1s TimeCoverageRelationStatistics Valid=36591, Invalid=38211, Unknown=0, NotChecked=0, Total=74802 [2022-12-14 03:18:03,079 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 3 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 03:18:03,080 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 30 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 03:18:03,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2022-12-14 03:18:03,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 312. [2022-12-14 03:18:03,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 309 states have (on average 1.0323624595469256) internal successors, (319), 311 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:18:03,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 319 transitions. [2022-12-14 03:18:03,082 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 319 transitions. Word has length 273 [2022-12-14 03:18:03,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:18:03,083 INFO L495 AbstractCegarLoop]: Abstraction has 312 states and 319 transitions. [2022-12-14 03:18:03,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 7 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) [2022-12-14 03:18:03,083 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 319 transitions. [2022-12-14 03:18:03,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2022-12-14 03:18:03,084 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:18:03,085 INFO L195 NwaCegarLoop]: trace histogram [131, 131, 3, 2, 2, 2, 1, 1, 1, 1, 1] [2022-12-14 03:18:03,092 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62aefa12-4775-4111-8d73-1e190db303d8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-12-14 03:18:03,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62aefa12-4775-4111-8d73-1e190db303d8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-14 03:18:03,285 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2022-12-14 03:18:03,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:18:03,285 INFO L85 PathProgramCache]: Analyzing trace with hash 1220466882, now seen corresponding path program 1 times [2022-12-14 03:18:03,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:18:03,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597723368] [2022-12-14 03:18:03,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:18:03,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:18:03,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:18:03,632 INFO L134 CoverageAnalysis]: Checked inductivity of 17169 backedges. 0 proven. 261 refuted. 0 times theorem prover too weak. 16908 trivial. 0 not checked. [2022-12-14 03:18:03,632 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:18:03,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597723368] [2022-12-14 03:18:03,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597723368] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 03:18:03,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148099693] [2022-12-14 03:18:03,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:18:03,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:18:03,633 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62aefa12-4775-4111-8d73-1e190db303d8/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 03:18:03,634 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62aefa12-4775-4111-8d73-1e190db303d8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 03:18:03,634 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62aefa12-4775-4111-8d73-1e190db303d8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-14 03:18:03,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:18:03,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 1811 conjuncts, 133 conjunts are in the unsatisfiable core [2022-12-14 03:18:03,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 03:18:08,446 INFO L134 CoverageAnalysis]: Checked inductivity of 17169 backedges. 0 proven. 17161 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 03:18:08,446 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 03:18:22,017 INFO L134 CoverageAnalysis]: Checked inductivity of 17169 backedges. 0 proven. 17161 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 03:18:22,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148099693] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 03:18:22,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1211065814] [2022-12-14 03:18:22,019 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-12-14 03:18:22,019 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 03:18:22,019 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 03:18:22,019 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 03:18:22,019 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 03:18:22,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:18:22,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:18:22,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:18:22,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:18:22,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:18:22,036 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2022-12-14 03:18:22,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:18:22,057 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-12-14 03:18:22,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:18:22,097 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 03:18:22,123 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-12-14 03:18:22,123 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 249 treesize of output 248 [2022-12-14 03:18:22,202 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 03:18:22,214 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 03:18:22,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:18:22,268 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 03:18:22,268 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 39 [2022-12-14 03:18:22,350 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 03:18:22,351 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 03:18:22,424 INFO L321 Elim1Store]: treesize reduction 281, result has 18.8 percent of original size [2022-12-14 03:18:22,424 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 208 treesize of output 193 [2022-12-14 03:18:22,532 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 03:18:22,538 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 03:18:22,538 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 03:18:22,552 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 03:18:22,557 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 03:18:22,558 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 03:18:22,564 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 03:18:23,607 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '20289#(and (= |ULTIMATE.start_main_~#dst~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 |ULTIMATE.start_main_~#src~0#1.base|) (= |ULTIMATE.start_main_~#src~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#dst~0#1.base|) (= |#NULL.offset| 0) (not (<= (+ |ULTIMATE.start_main_~#src~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4) 4) (select |#length| |ULTIMATE.start_main_~#src~0#1.base|))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 03:18:23,607 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 03:18:23,607 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 03:18:23,607 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 133, 133] total 268 [2022-12-14 03:18:23,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246671080] [2022-12-14 03:18:23,608 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 03:18:23,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 269 states [2022-12-14 03:18:23,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:18:23,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 269 interpolants. [2022-12-14 03:18:23,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36335, Invalid=39565, Unknown=0, NotChecked=0, Total=75900 [2022-12-14 03:18:23,616 INFO L87 Difference]: Start difference. First operand 312 states and 319 transitions. Second operand has 269 states, 269 states have (on average 2.037174721189591) internal successors, (548), 268 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:22:01,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 03:22:01,829 INFO L93 Difference]: Finished difference Result 4518 states and 4786 transitions. [2022-12-14 03:22:01,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 267 states. [2022-12-14 03:22:01,830 INFO L78 Accepts]: Start accepts. Automaton has has 269 states, 269 states have (on average 2.037174721189591) internal successors, (548), 268 states have internal predecessors, (548), 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 276 [2022-12-14 03:22:01,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 03:22:01,836 INFO L225 Difference]: With dead ends: 4518 [2022-12-14 03:22:01,836 INFO L226 Difference]: Without dead ends: 4518 [2022-12-14 03:22:01,848 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1092 GetRequests, 555 SyntacticMatches, 0 SemanticMatches, 537 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47599 ImplicationChecksByTransitivity, 41.9s TimeCoverageRelationStatistics Valid=106556, Invalid=183426, Unknown=0, NotChecked=0, Total=289982 [2022-12-14 03:22:01,848 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 19381 mSDsluCounter, 1590 mSDsCounter, 0 mSdLazyCounter, 2924 mSolverCounterSat, 2578 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19381 SdHoareTripleChecker+Valid, 1597 SdHoareTripleChecker+Invalid, 5502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2578 IncrementalHoareTripleChecker+Valid, 2924 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.8s IncrementalHoareTripleChecker+Time [2022-12-14 03:22:01,848 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19381 Valid, 1597 Invalid, 5502 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2578 Valid, 2924 Invalid, 0 Unknown, 0 Unchecked, 6.8s Time] [2022-12-14 03:22:01,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4518 states. [2022-12-14 03:22:01,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4518 to 578. [2022-12-14 03:22:01,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 578 states, 575 states have (on average 1.017391304347826) internal successors, (585), 577 states have internal predecessors, (585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:22:01,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 578 states to 578 states and 585 transitions. [2022-12-14 03:22:01,860 INFO L78 Accepts]: Start accepts. Automaton has 578 states and 585 transitions. Word has length 276 [2022-12-14 03:22:01,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 03:22:01,861 INFO L495 AbstractCegarLoop]: Abstraction has 578 states and 585 transitions. [2022-12-14 03:22:01,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 269 states, 269 states have (on average 2.037174721189591) internal successors, (548), 268 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 03:22:01,861 INFO L276 IsEmpty]: Start isEmpty. Operand 578 states and 585 transitions. [2022-12-14 03:22:01,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 544 [2022-12-14 03:22:01,863 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 03:22:01,863 INFO L195 NwaCegarLoop]: trace histogram [264, 264, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 03:22:01,870 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62aefa12-4775-4111-8d73-1e190db303d8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-12-14 03:22:02,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62aefa12-4775-4111-8d73-1e190db303d8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-14 03:22:02,065 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2022-12-14 03:22:02,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 03:22:02,066 INFO L85 PathProgramCache]: Analyzing trace with hash 381792734, now seen corresponding path program 1 times [2022-12-14 03:22:02,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 03:22:02,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552303066] [2022-12-14 03:22:02,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:22:02,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 03:22:02,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:22:36,565 INFO L134 CoverageAnalysis]: Checked inductivity of 69698 backedges. 0 proven. 69696 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 03:22:36,565 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 03:22:36,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552303066] [2022-12-14 03:22:36,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552303066] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 03:22:36,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527392233] [2022-12-14 03:22:36,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 03:22:36,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 03:22:36,565 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62aefa12-4775-4111-8d73-1e190db303d8/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 03:22:36,566 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62aefa12-4775-4111-8d73-1e190db303d8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 03:22:36,566 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_62aefa12-4775-4111-8d73-1e190db303d8/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-14 03:22:37,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 03:22:37,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 3542 conjuncts, 266 conjunts are in the unsatisfiable core [2022-12-14 03:22:37,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 03:22:37,524 INFO L134 CoverageAnalysis]: Checked inductivity of 69698 backedges. 0 proven. 69696 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 03:22:37,524 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 03:23:30,990 INFO L134 CoverageAnalysis]: Checked inductivity of 69698 backedges. 0 proven. 69696 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 03:23:30,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1527392233] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 03:23:30,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [313994544] [2022-12-14 03:23:30,991 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 03:23:30,991 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 03:23:30,991 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 03:23:30,991 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 03:23:30,992 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 03:23:31,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:23:31,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:23:31,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:23:31,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:23:31,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:23:31,005 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2022-12-14 03:23:31,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:23:31,020 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-12-14 03:23:31,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:23:31,054 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 03:23:31,075 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-12-14 03:23:31,075 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 249 treesize of output 248 [2022-12-14 03:23:31,143 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 03:23:31,154 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 03:23:31,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:23:31,201 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 03:23:31,209 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 03:23:31,210 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 49 [2022-12-14 03:23:31,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 03:23:31,277 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 03:23:31,278 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 03:23:31,322 INFO L321 Elim1Store]: treesize reduction 225, result has 14.1 percent of original size [2022-12-14 03:23:31,323 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 12 case distinctions, treesize of input 225 treesize of output 191 [2022-12-14 03:23:31,376 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 03:23:31,383 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 03:23:31,383 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 03:23:31,399 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 03:23:31,408 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 03:23:31,408 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 03:23:31,427 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 03:23:33,175 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '29703#(and (= |ULTIMATE.start_main_~#dst~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (= (select |#valid| |ULTIMATE.start_main_~#dst~0#1.base|) 1) (= (select |#valid| |ULTIMATE.start_main_~#src~0#1.base|) 1) (<= (+ |ULTIMATE.start_main_~#src~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4) 4) (select |#length| |ULTIMATE.start_main_~#src~0#1.base|)) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) (+ |ULTIMATE.start_main_~#src~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) 0)) (<= 0 |ULTIMATE.start_main_~#src~0#1.base|) (= |ULTIMATE.start_main_~#src~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_#t~mem6#1| (select (select |#memory_int| |ULTIMATE.start_main_~#dst~0#1.base|) (+ |ULTIMATE.start_main_~#dst~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4)))) (= |ULTIMATE.start_main_#t~mem7#1| (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) (+ |ULTIMATE.start_main_~#src~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4)))) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem7#1| |ULTIMATE.start_main_#t~mem6#1|) 1 0)) (<= 0 |ULTIMATE.start_main_~#dst~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= (+ |ULTIMATE.start_main_~#dst~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4) 4) (select |#length| |ULTIMATE.start_main_~#dst~0#1.base|)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 03:23:33,175 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 03:23:33,175 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 03:23:33,176 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [266, 266, 266] total 532 [2022-12-14 03:23:33,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542074725] [2022-12-14 03:23:33,176 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 03:23:33,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 533 states [2022-12-14 03:23:33,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 03:23:33,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 533 interpolants. [2022-12-14 03:23:33,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145007, Invalid=150385, Unknown=0, NotChecked=0, Total=295392 [2022-12-14 03:23:33,207 INFO L87 Difference]: Start difference. First operand 578 states and 585 transitions. Second operand has 533 states, 533 states have (on average 2.016885553470919) internal successors, (1075), 532 states have internal predecessors, (1075), 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)