./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety-ext3/derefAfterFree2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59cfd03c-5307-40f0-b788-a105b0506104/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59cfd03c-5307-40f0-b788-a105b0506104/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_59cfd03c-5307-40f0-b788-a105b0506104/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59cfd03c-5307-40f0-b788-a105b0506104/bin/utaipan-gh47qXpMRh/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-ext3/derefAfterFree2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59cfd03c-5307-40f0-b788-a105b0506104/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_59cfd03c-5307-40f0-b788-a105b0506104/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 6c5050f69dd0fe75249366946a38ba884fb5943ccf611397d2d01e0ccda347b5 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 08:42:05,578 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 08:42:05,580 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 08:42:05,598 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 08:42:05,599 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 08:42:05,600 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 08:42:05,601 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 08:42:05,602 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 08:42:05,603 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 08:42:05,604 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 08:42:05,605 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 08:42:05,606 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 08:42:05,606 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 08:42:05,607 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 08:42:05,608 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 08:42:05,609 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 08:42:05,610 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 08:42:05,611 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 08:42:05,612 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 08:42:05,614 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 08:42:05,615 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 08:42:05,616 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 08:42:05,617 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 08:42:05,618 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 08:42:05,621 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 08:42:05,621 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 08:42:05,622 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 08:42:05,622 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 08:42:05,623 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 08:42:05,624 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 08:42:05,624 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 08:42:05,624 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 08:42:05,625 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 08:42:05,626 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 08:42:05,627 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 08:42:05,627 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 08:42:05,627 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 08:42:05,628 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 08:42:05,628 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 08:42:05,628 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 08:42:05,629 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 08:42:05,630 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59cfd03c-5307-40f0-b788-a105b0506104/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-12-14 08:42:05,651 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 08:42:05,651 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 08:42:05,652 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 08:42:05,652 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 08:42:05,652 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 08:42:05,653 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 08:42:05,653 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 08:42:05,653 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 08:42:05,675 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 08:42:05,675 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 08:42:05,675 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 08:42:05,676 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 08:42:05,676 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 08:42:05,676 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 08:42:05,676 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 08:42:05,676 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 08:42:05,677 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 08:42:05,677 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 08:42:05,677 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-14 08:42:05,678 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-14 08:42:05,678 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 08:42:05,678 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 08:42:05,678 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-14 08:42:05,679 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 08:42:05,679 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 08:42:05,679 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 08:42:05,679 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-14 08:42:05,679 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-14 08:42:05,679 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-14 08:42:05,680 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 08:42:05,680 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-14 08:42:05,680 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 08:42:05,680 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 08:42:05,680 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 08:42:05,681 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 08:42:05,681 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 08:42:05,681 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 08:42:05,681 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 08:42:05,681 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 08:42:05,682 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 08:42:05,682 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 08:42:05,682 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 08:42:05,682 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_59cfd03c-5307-40f0-b788-a105b0506104/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59cfd03c-5307-40f0-b788-a105b0506104/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6c5050f69dd0fe75249366946a38ba884fb5943ccf611397d2d01e0ccda347b5 [2022-12-14 08:42:05,858 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 08:42:05,875 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 08:42:05,877 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 08:42:05,878 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 08:42:05,878 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 08:42:05,879 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59cfd03c-5307-40f0-b788-a105b0506104/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/memsafety-ext3/derefAfterFree2.c [2022-12-14 08:42:08,421 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 08:42:08,581 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 08:42:08,581 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59cfd03c-5307-40f0-b788-a105b0506104/sv-benchmarks/c/memsafety-ext3/derefAfterFree2.c [2022-12-14 08:42:08,586 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59cfd03c-5307-40f0-b788-a105b0506104/bin/utaipan-gh47qXpMRh/data/0438af6b4/43e4c10887e549e8b44b33be424a523a/FLAG7e8388500 [2022-12-14 08:42:08,599 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59cfd03c-5307-40f0-b788-a105b0506104/bin/utaipan-gh47qXpMRh/data/0438af6b4/43e4c10887e549e8b44b33be424a523a [2022-12-14 08:42:08,602 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 08:42:08,603 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 08:42:08,604 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 08:42:08,604 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 08:42:08,608 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 08:42:08,609 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 08:42:08" (1/1) ... [2022-12-14 08:42:08,609 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ed0c74d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:42:08, skipping insertion in model container [2022-12-14 08:42:08,610 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 08:42:08" (1/1) ... [2022-12-14 08:42:08,616 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 08:42:08,628 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 08:42:08,763 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 08:42:08,772 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 08:42:08,784 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 08:42:08,795 INFO L208 MainTranslator]: Completed translation [2022-12-14 08:42:08,795 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:42:08 WrapperNode [2022-12-14 08:42:08,795 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 08:42:08,796 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 08:42:08,796 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 08:42:08,796 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 08:42:08,802 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:42:08" (1/1) ... [2022-12-14 08:42:08,808 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:42:08" (1/1) ... [2022-12-14 08:42:08,825 INFO L138 Inliner]: procedures = 9, calls = 5, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 24 [2022-12-14 08:42:08,826 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 08:42:08,826 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 08:42:08,826 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 08:42:08,826 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 08:42:08,835 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:42:08" (1/1) ... [2022-12-14 08:42:08,835 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:42:08" (1/1) ... [2022-12-14 08:42:08,836 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:42:08" (1/1) ... [2022-12-14 08:42:08,837 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:42:08" (1/1) ... [2022-12-14 08:42:08,840 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:42:08" (1/1) ... [2022-12-14 08:42:08,843 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:42:08" (1/1) ... [2022-12-14 08:42:08,844 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:42:08" (1/1) ... [2022-12-14 08:42:08,845 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:42:08" (1/1) ... [2022-12-14 08:42:08,846 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 08:42:08,847 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 08:42:08,849 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 08:42:08,850 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 08:42:08,850 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:42:08" (1/1) ... [2022-12-14 08:42:08,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 08:42:08,867 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59cfd03c-5307-40f0-b788-a105b0506104/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:42:08,878 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59cfd03c-5307-40f0-b788-a105b0506104/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 08:42:08,880 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59cfd03c-5307-40f0-b788-a105b0506104/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 08:42:08,915 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-14 08:42:08,915 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-14 08:42:08,916 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 08:42:08,916 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 08:42:08,916 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 08:42:08,977 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 08:42:08,979 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 08:42:09,077 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 08:42:09,092 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 08:42:09,093 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-12-14 08:42:09,095 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 08:42:09 BoogieIcfgContainer [2022-12-14 08:42:09,095 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 08:42:09,098 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 08:42:09,098 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 08:42:09,101 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 08:42:09,101 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 08:42:08" (1/3) ... [2022-12-14 08:42:09,102 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@380bbad4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 08:42:09, skipping insertion in model container [2022-12-14 08:42:09,102 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:42:08" (2/3) ... [2022-12-14 08:42:09,102 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@380bbad4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 08:42:09, skipping insertion in model container [2022-12-14 08:42:09,102 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 08:42:09" (3/3) ... [2022-12-14 08:42:09,104 INFO L112 eAbstractionObserver]: Analyzing ICFG derefAfterFree2.c [2022-12-14 08:42:09,123 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 08:42:09,124 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2022-12-14 08:42:09,169 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 08:42:09,177 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;@10b9ca48, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 08:42:09,177 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-12-14 08:42:09,181 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 15 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:42:09,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-12-14 08:42:09,187 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:42:09,187 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-12-14 08:42:09,188 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 3 more)] === [2022-12-14 08:42:09,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:42:09,193 INFO L85 PathProgramCache]: Analyzing trace with hash 64636, now seen corresponding path program 1 times [2022-12-14 08:42:09,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:42:09,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255682184] [2022-12-14 08:42:09,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:42:09,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:42:09,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:42:09,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:42:09,323 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:42:09,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255682184] [2022-12-14 08:42:09,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255682184] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:42:09,324 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:42:09,324 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 08:42:09,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115759535] [2022-12-14 08:42:09,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:42:09,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:42:09,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:42:09,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:42:09,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:42:09,353 INFO L87 Difference]: Start difference. First operand has 16 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 15 states have internal predecessors, (17), 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 08:42:09,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:42:09,388 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2022-12-14 08:42:09,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:42:09,390 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 08:42:09,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:42:09,396 INFO L225 Difference]: With dead ends: 22 [2022-12-14 08:42:09,396 INFO L226 Difference]: Without dead ends: 21 [2022-12-14 08:42:09,398 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 08:42:09,402 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 5 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 08:42:09,403 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 17 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 08:42:09,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-12-14 08:42:09,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 18. [2022-12-14 08:42:09,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 12 states have (on average 1.75) internal successors, (21), 17 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:42:09,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2022-12-14 08:42:09,432 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 3 [2022-12-14 08:42:09,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:42:09,432 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2022-12-14 08:42:09,432 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 08:42:09,433 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2022-12-14 08:42:09,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-12-14 08:42:09,433 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:42:09,433 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-12-14 08:42:09,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 08:42:09,434 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 3 more)] === [2022-12-14 08:42:09,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:42:09,435 INFO L85 PathProgramCache]: Analyzing trace with hash 63748, now seen corresponding path program 1 times [2022-12-14 08:42:09,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:42:09,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885080868] [2022-12-14 08:42:09,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:42:09,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:42:09,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:42:09,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:42:09,488 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:42:09,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885080868] [2022-12-14 08:42:09,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885080868] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:42:09,488 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:42:09,489 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 08:42:09,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346131761] [2022-12-14 08:42:09,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:42:09,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:42:09,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:42:09,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:42:09,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:42:09,516 INFO L87 Difference]: Start difference. First operand 18 states and 21 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 08:42:09,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:42:09,540 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2022-12-14 08:42:09,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:42:09,540 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 08:42:09,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:42:09,541 INFO L225 Difference]: With dead ends: 23 [2022-12-14 08:42:09,541 INFO L226 Difference]: Without dead ends: 23 [2022-12-14 08:42:09,541 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 08:42:09,542 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 11 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 08:42:09,542 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 9 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 08:42:09,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-12-14 08:42:09,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2022-12-14 08:42:09,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 15 states have (on average 1.6) internal successors, (24), 19 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:42:09,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2022-12-14 08:42:09,557 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 3 [2022-12-14 08:42:09,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:42:09,557 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2022-12-14 08:42:09,558 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 08:42:09,558 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2022-12-14 08:42:09,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-12-14 08:42:09,558 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:42:09,558 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-12-14 08:42:09,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 08:42:09,558 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 3 more)] === [2022-12-14 08:42:09,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:42:09,559 INFO L85 PathProgramCache]: Analyzing trace with hash 63749, now seen corresponding path program 1 times [2022-12-14 08:42:09,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:42:09,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914777757] [2022-12-14 08:42:09,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:42:09,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:42:09,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:42:09,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:42:09,626 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:42:09,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914777757] [2022-12-14 08:42:09,626 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914777757] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:42:09,627 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:42:09,627 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 08:42:09,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055552370] [2022-12-14 08:42:09,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:42:09,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:42:09,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:42:09,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:42:09,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:42:09,629 INFO L87 Difference]: Start difference. First operand 20 states and 24 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 08:42:09,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:42:09,659 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2022-12-14 08:42:09,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:42:09,660 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 08:42:09,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:42:09,660 INFO L225 Difference]: With dead ends: 21 [2022-12-14 08:42:09,660 INFO L226 Difference]: Without dead ends: 21 [2022-12-14 08:42:09,661 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 08:42:09,662 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 2 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 08:42:09,662 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 10 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 08:42:09,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-12-14 08:42:09,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2022-12-14 08:42:09,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 19 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:42:09,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2022-12-14 08:42:09,666 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 3 [2022-12-14 08:42:09,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:42:09,666 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2022-12-14 08:42:09,666 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 08:42:09,667 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2022-12-14 08:42:09,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-14 08:42:09,667 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:42:09,667 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:42:09,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 08:42:09,668 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 3 more)] === [2022-12-14 08:42:09,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:42:09,668 INFO L85 PathProgramCache]: Analyzing trace with hash -1257107777, now seen corresponding path program 1 times [2022-12-14 08:42:09,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:42:09,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067339990] [2022-12-14 08:42:09,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:42:09,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:42:09,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:42:09,718 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 08:42:09,719 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:42:09,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067339990] [2022-12-14 08:42:09,719 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067339990] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:42:09,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974342946] [2022-12-14 08:42:09,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:42:09,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:42:09,719 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59cfd03c-5307-40f0-b788-a105b0506104/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:42:09,721 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59cfd03c-5307-40f0-b788-a105b0506104/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:42:09,722 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59cfd03c-5307-40f0-b788-a105b0506104/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 08:42:09,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:42:09,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 08:42:09,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:42:09,790 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 08:42:09,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:42:09,813 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 08:42:09,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [974342946] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:42:09,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1527382170] [2022-12-14 08:42:09,833 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 08:42:09,833 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 08:42:09,838 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 08:42:09,844 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 08:42:09,844 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 08:42:09,907 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 6 treesize of output 5 [2022-12-14 08:42:09,930 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-12-14 08:42:09,974 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2022-12-14 08:42:10,053 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 155 treesize of output 148 [2022-12-14 08:42:10,109 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-12-14 08:42:10,160 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-12-14 08:42:10,184 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 08:42:10,415 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '194#(and (not (= |ULTIMATE.start_main_old_#valid#1| |#valid|)) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~p~0#1.offset| 0) (not (< |ULTIMATE.start_main_~i~0#1| 10)) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_#res#1| 0) (= |#NULL.base| 0))' at error location [2022-12-14 08:42:10,416 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 08:42:10,416 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 08:42:10,416 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2022-12-14 08:42:10,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788838784] [2022-12-14 08:42:10,416 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 08:42:10,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 08:42:10,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:42:10,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 08:42:10,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-12-14 08:42:10,418 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:42:10,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:42:10,453 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2022-12-14 08:42:10,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 08:42:10,453 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-12-14 08:42:10,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:42:10,453 INFO L225 Difference]: With dead ends: 32 [2022-12-14 08:42:10,453 INFO L226 Difference]: Without dead ends: 32 [2022-12-14 08:42:10,454 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-12-14 08:42:10,454 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 26 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 08:42:10,454 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 21 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 08:42:10,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-12-14 08:42:10,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2022-12-14 08:42:10,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 25 states have (on average 1.4) internal successors, (35), 29 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 08:42:10,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2022-12-14 08:42:10,457 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 7 [2022-12-14 08:42:10,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:42:10,457 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2022-12-14 08:42:10,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:42:10,457 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2022-12-14 08:42:10,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-14 08:42:10,458 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:42:10,458 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2022-12-14 08:42:10,464 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59cfd03c-5307-40f0-b788-a105b0506104/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 08:42:10,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59cfd03c-5307-40f0-b788-a105b0506104/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:42:10,660 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 3 more)] === [2022-12-14 08:42:10,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:42:10,662 INFO L85 PathProgramCache]: Analyzing trace with hash -1257108664, now seen corresponding path program 1 times [2022-12-14 08:42:10,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:42:10,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366897928] [2022-12-14 08:42:10,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:42:10,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:42:10,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:42:10,854 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:42:10,854 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:42:10,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366897928] [2022-12-14 08:42:10,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366897928] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:42:10,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39718843] [2022-12-14 08:42:10,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:42:10,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:42:10,855 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59cfd03c-5307-40f0-b788-a105b0506104/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:42:10,856 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59cfd03c-5307-40f0-b788-a105b0506104/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:42:10,857 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59cfd03c-5307-40f0-b788-a105b0506104/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 08:42:10,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:42:10,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 08:42:10,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:42:10,896 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 08:42:10,942 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 08:42:10,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:42:10,987 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 08:42:10,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [39718843] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:42:10,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1438180518] [2022-12-14 08:42:10,989 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2022-12-14 08:42:10,989 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 08:42:10,989 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 08:42:10,989 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 08:42:10,990 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 08:42:10,998 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 6 treesize of output 5 [2022-12-14 08:42:11,007 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-12-14 08:42:11,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:42:11,023 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-12-14 08:42:11,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:42:11,061 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-12-14 08:42:11,061 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 157 treesize of output 150 [2022-12-14 08:42:11,093 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-12-14 08:42:11,154 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 15 treesize of output 11 [2022-12-14 08:42:11,162 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 08:42:11,375 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '307#(and (<= |ULTIMATE.start_main_~i~0#1| 10) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~i~0#1|) (not (<= (+ |ULTIMATE.start_main_~p~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4) 4) (select |#length| |ULTIMATE.start_main_~p~0#1.base|))) (= |ULTIMATE.start_main_~p~0#1.offset| 0) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 08:42:11,375 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 08:42:11,375 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 08:42:11,375 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 7 [2022-12-14 08:42:11,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976035349] [2022-12-14 08:42:11,376 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 08:42:11,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-14 08:42:11,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:42:11,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-14 08:42:11,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2022-12-14 08:42:11,377 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:42:11,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:42:11,485 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2022-12-14 08:42:11,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 08:42:11,486 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-12-14 08:42:11,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:42:11,486 INFO L225 Difference]: With dead ends: 29 [2022-12-14 08:42:11,486 INFO L226 Difference]: Without dead ends: 29 [2022-12-14 08:42:11,487 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2022-12-14 08:42:11,488 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 42 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 08:42:11,488 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 4 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 08:42:11,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-12-14 08:42:11,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-12-14 08:42:11,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 25 states have (on average 1.24) 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 08:42:11,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2022-12-14 08:42:11,490 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 7 [2022-12-14 08:42:11,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:42:11,490 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2022-12-14 08:42:11,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:42:11,491 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2022-12-14 08:42:11,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-12-14 08:42:11,491 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:42:11,491 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1] [2022-12-14 08:42:11,496 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59cfd03c-5307-40f0-b788-a105b0506104/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 08:42:11,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59cfd03c-5307-40f0-b788-a105b0506104/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:42:11,692 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 3 more)] === [2022-12-14 08:42:11,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:42:11,693 INFO L85 PathProgramCache]: Analyzing trace with hash -1518770230, now seen corresponding path program 1 times [2022-12-14 08:42:11,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:42:11,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315976364] [2022-12-14 08:42:11,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:42:11,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:42:11,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:42:11,747 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 08:42:11,748 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:42:11,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315976364] [2022-12-14 08:42:11,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315976364] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:42:11,749 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:42:11,749 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 08:42:11,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611779589] [2022-12-14 08:42:11,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:42:11,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:42:11,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:42:11,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:42:11,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:42:11,753 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:42:11,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:42:11,771 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2022-12-14 08:42:11,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:42:11,772 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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 13 [2022-12-14 08:42:11,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:42:11,774 INFO L225 Difference]: With dead ends: 28 [2022-12-14 08:42:11,774 INFO L226 Difference]: Without dead ends: 28 [2022-12-14 08:42:11,775 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 08:42:11,777 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 7 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 08:42:11,778 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 9 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 08:42:11,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-12-14 08:42:11,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-12-14 08:42:11,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 25 states have (on average 1.2) internal successors, (30), 27 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:42:11,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2022-12-14 08:42:11,784 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 13 [2022-12-14 08:42:11,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:42:11,785 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2022-12-14 08:42:11,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:42:11,785 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2022-12-14 08:42:11,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-12-14 08:42:11,786 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:42:11,786 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1] [2022-12-14 08:42:11,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-14 08:42:11,787 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 3 more)] === [2022-12-14 08:42:11,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:42:11,788 INFO L85 PathProgramCache]: Analyzing trace with hash 162763176, now seen corresponding path program 1 times [2022-12-14 08:42:11,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:42:11,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178176575] [2022-12-14 08:42:11,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:42:11,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:42:11,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:42:11,841 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 08:42:11,841 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:42:11,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178176575] [2022-12-14 08:42:11,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178176575] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:42:11,842 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:42:11,842 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 08:42:11,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168310125] [2022-12-14 08:42:11,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:42:11,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:42:11,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:42:11,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:42:11,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:42:11,843 INFO L87 Difference]: Start difference. First operand 28 states and 30 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 08:42:11,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:42:11,851 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2022-12-14 08:42:11,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:42:11,852 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 14 [2022-12-14 08:42:11,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:42:11,852 INFO L225 Difference]: With dead ends: 27 [2022-12-14 08:42:11,853 INFO L226 Difference]: Without dead ends: 27 [2022-12-14 08:42:11,853 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 08:42:11,853 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 5 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 08:42:11,853 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 6 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 08:42:11,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-12-14 08:42:11,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-12-14 08:42:11,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 25 states have (on average 1.16) internal successors, (29), 26 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:42:11,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2022-12-14 08:42:11,856 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 14 [2022-12-14 08:42:11,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:42:11,856 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2022-12-14 08:42:11,856 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 08:42:11,856 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2022-12-14 08:42:11,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-12-14 08:42:11,856 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:42:11,856 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2022-12-14 08:42:11,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-14 08:42:11,857 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 3 more)] === [2022-12-14 08:42:11,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:42:11,857 INFO L85 PathProgramCache]: Analyzing trace with hash -52758481, now seen corresponding path program 1 times [2022-12-14 08:42:11,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:42:11,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993535170] [2022-12-14 08:42:11,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:42:11,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:42:11,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:42:11,894 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:42:11,894 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:42:11,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993535170] [2022-12-14 08:42:11,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993535170] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:42:11,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229883266] [2022-12-14 08:42:11,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:42:11,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:42:11,895 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59cfd03c-5307-40f0-b788-a105b0506104/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:42:11,896 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59cfd03c-5307-40f0-b788-a105b0506104/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:42:11,896 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59cfd03c-5307-40f0-b788-a105b0506104/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 08:42:11,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:42:11,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 08:42:11,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:42:11,946 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:42:11,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:42:11,967 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:42:11,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229883266] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:42:11,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1813363609] [2022-12-14 08:42:11,968 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 08:42:11,968 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 08:42:11,969 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 08:42:11,969 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 08:42:11,969 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 08:42:11,981 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 6 treesize of output 5 [2022-12-14 08:42:11,992 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-12-14 08:42:12,008 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2022-12-14 08:42:12,052 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 155 treesize of output 148 [2022-12-14 08:42:12,075 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-12-14 08:42:12,086 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-12-14 08:42:12,099 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 08:42:12,115 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-12-14 08:42:12,152 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-12-14 08:42:12,159 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 08:42:12,331 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '603#(and (<= |ULTIMATE.start_main_~i~0#1| 10) (not (= (select |#valid| |ULTIMATE.start_main_~p~0#1.base|) 1)) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~p~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 08:42:12,331 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 08:42:12,331 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 08:42:12,331 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6 [2022-12-14 08:42:12,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030229656] [2022-12-14 08:42:12,331 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 08:42:12,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 08:42:12,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:42:12,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 08:42:12,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2022-12-14 08:42:12,333 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:42:12,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:42:12,357 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2022-12-14 08:42:12,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 08:42:12,357 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-12-14 08:42:12,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:42:12,358 INFO L225 Difference]: With dead ends: 34 [2022-12-14 08:42:12,358 INFO L226 Difference]: Without dead ends: 34 [2022-12-14 08:42:12,358 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2022-12-14 08:42:12,359 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 1 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 08:42:12,359 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 16 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 08:42:12,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-12-14 08:42:12,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2022-12-14 08:42:12,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 31 states have (on average 1.096774193548387) internal successors, (34), 32 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:42:12,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2022-12-14 08:42:12,363 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 18 [2022-12-14 08:42:12,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:42:12,363 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2022-12-14 08:42:12,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:42:12,363 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2022-12-14 08:42:12,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-12-14 08:42:12,364 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:42:12,364 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1] [2022-12-14 08:42:12,369 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59cfd03c-5307-40f0-b788-a105b0506104/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 08:42:12,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59cfd03c-5307-40f0-b788-a105b0506104/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:42:12,565 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 3 more)] === [2022-12-14 08:42:12,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:42:12,566 INFO L85 PathProgramCache]: Analyzing trace with hash -197830453, now seen corresponding path program 2 times [2022-12-14 08:42:12,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:42:12,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522470018] [2022-12-14 08:42:12,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:42:12,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:42:12,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:42:12,743 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:42:12,743 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:42:12,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522470018] [2022-12-14 08:42:12,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522470018] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:42:12,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249044069] [2022-12-14 08:42:12,744 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 08:42:12,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:42:12,744 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59cfd03c-5307-40f0-b788-a105b0506104/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:42:12,745 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59cfd03c-5307-40f0-b788-a105b0506104/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:42:12,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59cfd03c-5307-40f0-b788-a105b0506104/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 08:42:12,791 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-14 08:42:12,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 08:42:12,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-14 08:42:12,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:42:12,817 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:42:12,817 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:42:12,872 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:42:12,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249044069] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:42:12,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [511621678] [2022-12-14 08:42:12,874 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 08:42:12,874 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 08:42:12,874 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 08:42:12,875 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 08:42:12,875 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 08:42:12,883 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 6 treesize of output 5 [2022-12-14 08:42:12,894 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-12-14 08:42:12,910 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2022-12-14 08:42:12,953 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 155 treesize of output 148 [2022-12-14 08:42:12,987 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-12-14 08:42:13,028 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-12-14 08:42:13,034 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 08:42:13,227 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '820#(and (not (= |ULTIMATE.start_main_old_#valid#1| |#valid|)) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~p~0#1.offset| 0) (not (< |ULTIMATE.start_main_~i~0#1| 10)) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_#res#1| 0) (= |#NULL.base| 0))' at error location [2022-12-14 08:42:13,227 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 08:42:13,227 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 08:42:13,227 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-12-14 08:42:13,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462656092] [2022-12-14 08:42:13,227 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 08:42:13,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-14 08:42:13,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:42:13,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-14 08:42:13,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2022-12-14 08:42:13,229 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 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 08:42:13,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:42:13,277 INFO L93 Difference]: Finished difference Result 48 states and 53 transitions. [2022-12-14 08:42:13,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 08:42:13,278 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 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) Word has length 23 [2022-12-14 08:42:13,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:42:13,279 INFO L225 Difference]: With dead ends: 48 [2022-12-14 08:42:13,279 INFO L226 Difference]: Without dead ends: 48 [2022-12-14 08:42:13,280 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2022-12-14 08:42:13,280 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 13 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 08:42:13,281 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 24 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 08:42:13,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-12-14 08:42:13,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2022-12-14 08:42:13,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 46 states have (on average 1.1521739130434783) internal successors, (53), 47 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:42:13,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 53 transitions. [2022-12-14 08:42:13,285 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 53 transitions. Word has length 23 [2022-12-14 08:42:13,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:42:13,285 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 53 transitions. [2022-12-14 08:42:13,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 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 08:42:13,285 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions. [2022-12-14 08:42:13,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-12-14 08:42:13,286 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:42:13,286 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 5, 1, 1, 1, 1, 1, 1] [2022-12-14 08:42:13,290 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59cfd03c-5307-40f0-b788-a105b0506104/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-12-14 08:42:13,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59cfd03c-5307-40f0-b788-a105b0506104/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:42:13,487 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 3 more)] === [2022-12-14 08:42:13,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:42:13,489 INFO L85 PathProgramCache]: Analyzing trace with hash 1316000454, now seen corresponding path program 2 times [2022-12-14 08:42:13,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:42:13,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838814944] [2022-12-14 08:42:13,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:42:13,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:42:13,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-14 08:42:13,535 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-14 08:42:13,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-14 08:42:13,579 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-12-14 08:42:13,579 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-14 08:42:13,581 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 6 remaining) [2022-12-14 08:42:13,583 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 6 remaining) [2022-12-14 08:42:13,583 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (3 of 6 remaining) [2022-12-14 08:42:13,583 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_FREE (2 of 6 remaining) [2022-12-14 08:42:13,583 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE (1 of 6 remaining) [2022-12-14 08:42:13,584 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (0 of 6 remaining) [2022-12-14 08:42:13,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-14 08:42:13,587 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1, 1, 1, 1] [2022-12-14 08:42:13,591 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-12-14 08:42:13,607 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.12 08:42:13 BoogieIcfgContainer [2022-12-14 08:42:13,607 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-12-14 08:42:13,607 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-12-14 08:42:13,607 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-12-14 08:42:13,608 INFO L275 PluginConnector]: Witness Printer initialized [2022-12-14 08:42:13,608 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 08:42:09" (3/4) ... [2022-12-14 08:42:13,609 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2022-12-14 08:42:13,636 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59cfd03c-5307-40f0-b788-a105b0506104/bin/utaipan-gh47qXpMRh/witness.graphml [2022-12-14 08:42:13,636 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-12-14 08:42:13,636 INFO L158 Benchmark]: Toolchain (without parser) took 5033.38ms. Allocated memory was 121.6MB in the beginning and 230.7MB in the end (delta: 109.1MB). Free memory was 88.9MB in the beginning and 94.5MB in the end (delta: -5.6MB). Peak memory consumption was 105.1MB. Max. memory is 16.1GB. [2022-12-14 08:42:13,636 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 121.6MB. Free memory is still 89.6MB. There was no memory consumed. Max. memory is 16.1GB. [2022-12-14 08:42:13,637 INFO L158 Benchmark]: CACSL2BoogieTranslator took 191.50ms. Allocated memory is still 121.6MB. Free memory was 88.6MB in the beginning and 79.3MB in the end (delta: 9.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-12-14 08:42:13,637 INFO L158 Benchmark]: Boogie Procedure Inliner took 29.52ms. Allocated memory is still 121.6MB. Free memory was 79.3MB in the beginning and 78.0MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. [2022-12-14 08:42:13,637 INFO L158 Benchmark]: Boogie Preprocessor took 20.18ms. Allocated memory is still 121.6MB. Free memory was 77.9MB in the beginning and 76.8MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-14 08:42:13,637 INFO L158 Benchmark]: RCFGBuilder took 248.55ms. Allocated memory is still 121.6MB. Free memory was 76.8MB in the beginning and 66.4MB in the end (delta: 10.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-12-14 08:42:13,637 INFO L158 Benchmark]: TraceAbstraction took 4509.47ms. Allocated memory was 121.6MB in the beginning and 230.7MB in the end (delta: 109.1MB). Free memory was 65.7MB in the beginning and 96.6MB in the end (delta: -30.9MB). Peak memory consumption was 79.9MB. Max. memory is 16.1GB. [2022-12-14 08:42:13,638 INFO L158 Benchmark]: Witness Printer took 28.50ms. Allocated memory is still 230.7MB. Free memory was 96.6MB in the beginning and 94.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-14 08:42:13,638 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 121.6MB. Free memory is still 89.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 191.50ms. Allocated memory is still 121.6MB. Free memory was 88.6MB in the beginning and 79.3MB in the end (delta: 9.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 29.52ms. Allocated memory is still 121.6MB. Free memory was 79.3MB in the beginning and 78.0MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 20.18ms. Allocated memory is still 121.6MB. Free memory was 77.9MB in the beginning and 76.8MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 248.55ms. Allocated memory is still 121.6MB. Free memory was 76.8MB in the beginning and 66.4MB in the end (delta: 10.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 4509.47ms. Allocated memory was 121.6MB in the beginning and 230.7MB in the end (delta: 109.1MB). Free memory was 65.7MB in the beginning and 96.6MB in the end (delta: -30.9MB). Peak memory consumption was 79.9MB. Max. memory is 16.1GB. * Witness Printer took 28.50ms. Allocated memory is still 230.7MB. Free memory was 96.6MB in the beginning and 94.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: -1]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L6] int* p = malloc(10 * sizeof(int)); [L8] int i = 0; VAL [i=0, p={-1:0}] [L8] COND TRUE i < 10 VAL [i=0, p={-1:0}] [L9] p[i] = 1 VAL [i=0, p={-1:0}] [L10] COND FALSE !(i == 5) VAL [i=0, p={-1:0}] [L8] i++ VAL [i=1, p={-1:0}] [L8] COND TRUE i < 10 VAL [i=1, p={-1:0}] [L9] p[i] = 1 VAL [i=1, p={-1:0}] [L10] COND FALSE !(i == 5) VAL [i=1, p={-1:0}] [L8] i++ VAL [i=2, p={-1:0}] [L8] COND TRUE i < 10 VAL [i=2, p={-1:0}] [L9] p[i] = 1 VAL [i=2, p={-1:0}] [L10] COND FALSE !(i == 5) VAL [i=2, p={-1:0}] [L8] i++ VAL [i=3, p={-1:0}] [L8] COND TRUE i < 10 VAL [i=3, p={-1:0}] [L9] p[i] = 1 VAL [i=3, p={-1:0}] [L10] COND FALSE !(i == 5) VAL [i=3, p={-1:0}] [L8] i++ VAL [i=4, p={-1:0}] [L8] COND TRUE i < 10 VAL [i=4, p={-1:0}] [L9] p[i] = 1 VAL [i=4, p={-1:0}] [L10] COND FALSE !(i == 5) VAL [i=4, p={-1:0}] [L8] i++ VAL [i=5, p={-1:0}] [L8] COND TRUE i < 10 VAL [i=5, p={-1:0}] [L9] p[i] = 1 VAL [i=5, p={-1:0}] [L10] COND TRUE i == 5 VAL [i=5, p={-1:0}] [L11] free(p) VAL [i=5, p={-1:0}] [L11] free(p) VAL [i=5, p={-1:0}] [L11] free(p) [L8] i++ VAL [i=6, p={-1:0}] [L8] COND TRUE i < 10 VAL [i=6, p={-1:0}] [L9] p[i] = 1 - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 11]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 11]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 11]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 5]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 16 locations, 6 error locations. Started 1 CEGAR loops. OverallTime: 4.4s, OverallIterations: 10, TraceHistogramMax: 7, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 112 SdHoareTripleChecker+Valid, 0.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 112 mSDsluCounter, 116 SdHoareTripleChecker+Invalid, 0.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 57 mSDsCounter, 22 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 229 IncrementalHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 22 mSolverCounterUnsat, 59 mSDtfsCounter, 229 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 184 GetRequests, 120 SyntacticMatches, 6 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 1.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=48occurred in iteration=9, InterpolantAutomatonStates: 47, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 9 MinimizatonAttempts, 10 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.9s InterpolantComputationTime, 176 NumberOfCodeBlocks, 176 NumberOfCodeBlocksAsserted, 19 NumberOfCheckSat, 184 ConstructedInterpolants, 0 QuantifiedInterpolants, 786 SizeOfPredicates, 0 NumberOfNonLiveVariables, 236 ConjunctsInSsa, 23 ConjunctsInUnsatCore, 17 InterpolantComputations, 5 PerfectInterpolantSequences, 45/218 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-12-14 08:42:13,652 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_59cfd03c-5307-40f0-b788-a105b0506104/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-deref)