./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memcleanup.prp --file ../../sv-benchmarks/c/memsafety-bftpd/bftpd_2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (memcleanup) 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_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/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_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-bftpd/bftpd_2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/config/svcomp-MemCleanup-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/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-memcleanup) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 7c883b81b24ce5a721aa9a1ff13aef8a0d532ba87d9e130e470a0b88a1f8e93e --- 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 11:46:12,660 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 11:46:12,661 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 11:46:12,674 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 11:46:12,674 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 11:46:12,675 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 11:46:12,676 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 11:46:12,677 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 11:46:12,678 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 11:46:12,679 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 11:46:12,679 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 11:46:12,680 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 11:46:12,680 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 11:46:12,681 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 11:46:12,682 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 11:46:12,683 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 11:46:12,683 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 11:46:12,684 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 11:46:12,685 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 11:46:12,686 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 11:46:12,687 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 11:46:12,689 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 11:46:12,690 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 11:46:12,690 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 11:46:12,693 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 11:46:12,693 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 11:46:12,694 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 11:46:12,694 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 11:46:12,695 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 11:46:12,695 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 11:46:12,696 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 11:46:12,696 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 11:46:12,697 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 11:46:12,697 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 11:46:12,698 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 11:46:12,698 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 11:46:12,699 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 11:46:12,699 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 11:46:12,699 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 11:46:12,700 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 11:46:12,700 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 11:46:12,701 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/config/svcomp-MemCleanup-32bit-Taipan_Default.epf [2022-12-14 11:46:12,716 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 11:46:12,716 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 11:46:12,716 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 11:46:12,716 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 11:46:12,717 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 11:46:12,717 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 11:46:12,717 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 11:46:12,717 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 11:46:12,717 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 11:46:12,718 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 11:46:12,718 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 11:46:12,718 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 11:46:12,718 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 11:46:12,718 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 11:46:12,718 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 11:46:12,719 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 11:46:12,719 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 11:46:12,719 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 11:46:12,719 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-14 11:46:12,720 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-14 11:46:12,720 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 11:46:12,720 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 11:46:12,720 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-14 11:46:12,720 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 11:46:12,720 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 11:46:12,721 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 11:46:12,721 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-14 11:46:12,721 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-14 11:46:12,721 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 11:46:12,721 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-14 11:46:12,721 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 11:46:12,721 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 11:46:12,722 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 11:46:12,722 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 11:46:12,722 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 11:46:12,722 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 11:46:12,722 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 11:46:12,723 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 11:46:12,723 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 11:46:12,723 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 11:46:12,723 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 11:46:12,723 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_dc033242-ed9f-4625-b471-5c7de210d0c4/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-memcleanup) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7c883b81b24ce5a721aa9a1ff13aef8a0d532ba87d9e130e470a0b88a1f8e93e [2022-12-14 11:46:12,889 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 11:46:12,906 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 11:46:12,908 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 11:46:12,909 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 11:46:12,909 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 11:46:12,910 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/memsafety-bftpd/bftpd_2.i [2022-12-14 11:46:15,494 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 11:46:15,703 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 11:46:15,704 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/sv-benchmarks/c/memsafety-bftpd/bftpd_2.i [2022-12-14 11:46:15,719 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/data/88c136e7e/b5afe871e011452eb2861f6a6706acd1/FLAGafcd8d675 [2022-12-14 11:46:15,729 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/data/88c136e7e/b5afe871e011452eb2861f6a6706acd1 [2022-12-14 11:46:15,731 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 11:46:15,733 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 11:46:15,734 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 11:46:15,734 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 11:46:15,737 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 11:46:15,738 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 11:46:15" (1/1) ... [2022-12-14 11:46:15,739 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3309811c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:46:15, skipping insertion in model container [2022-12-14 11:46:15,739 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 11:46:15" (1/1) ... [2022-12-14 11:46:15,745 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 11:46:15,775 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 11:46:16,031 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 11:46:16,039 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 11:46:16,064 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 11:46:16,084 INFO L208 MainTranslator]: Completed translation [2022-12-14 11:46:16,085 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:46:16 WrapperNode [2022-12-14 11:46:16,085 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 11:46:16,086 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 11:46:16,086 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 11:46:16,086 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 11:46:16,091 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:46:16" (1/1) ... [2022-12-14 11:46:16,101 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:46:16" (1/1) ... [2022-12-14 11:46:16,117 INFO L138 Inliner]: procedures = 168, calls = 42, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 95 [2022-12-14 11:46:16,117 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 11:46:16,118 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 11:46:16,118 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 11:46:16,118 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 11:46:16,125 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:46:16" (1/1) ... [2022-12-14 11:46:16,125 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:46:16" (1/1) ... [2022-12-14 11:46:16,127 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:46:16" (1/1) ... [2022-12-14 11:46:16,127 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:46:16" (1/1) ... [2022-12-14 11:46:16,132 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:46:16" (1/1) ... [2022-12-14 11:46:16,135 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:46:16" (1/1) ... [2022-12-14 11:46:16,136 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:46:16" (1/1) ... [2022-12-14 11:46:16,136 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:46:16" (1/1) ... [2022-12-14 11:46:16,138 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 11:46:16,139 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 11:46:16,139 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 11:46:16,139 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 11:46:16,139 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:46:16" (1/1) ... [2022-12-14 11:46:16,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 11:46:16,152 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:46:16,161 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 11:46:16,163 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 11:46:16,189 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-14 11:46:16,189 INFO L130 BoogieDeclarations]: Found specification of procedure parse_input [2022-12-14 11:46:16,189 INFO L138 BoogieDeclarations]: Found implementation of procedure parse_input [2022-12-14 11:46:16,190 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-14 11:46:16,190 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 11:46:16,190 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-12-14 11:46:16,190 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 11:46:16,190 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-12-14 11:46:16,190 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 11:46:16,190 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 11:46:16,190 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 11:46:16,278 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 11:46:16,280 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 11:46:16,465 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 11:46:16,498 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 11:46:16,498 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-12-14 11:46:16,500 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 11:46:16 BoogieIcfgContainer [2022-12-14 11:46:16,500 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 11:46:16,502 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 11:46:16,502 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 11:46:16,505 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 11:46:16,505 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 11:46:15" (1/3) ... [2022-12-14 11:46:16,506 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@633b67fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 11:46:16, skipping insertion in model container [2022-12-14 11:46:16,506 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:46:16" (2/3) ... [2022-12-14 11:46:16,506 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@633b67fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 11:46:16, skipping insertion in model container [2022-12-14 11:46:16,506 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 11:46:16" (3/3) ... [2022-12-14 11:46:16,507 INFO L112 eAbstractionObserver]: Analyzing ICFG bftpd_2.i [2022-12-14 11:46:16,521 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 11:46:16,522 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 20 error locations. [2022-12-14 11:46:16,556 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 11:46:16,561 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;@48bdd62d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 11:46:16,561 INFO L358 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2022-12-14 11:46:16,564 INFO L276 IsEmpty]: Start isEmpty. Operand has 58 states, 33 states have (on average 1.8181818181818181) internal successors, (60), 53 states have internal predecessors, (60), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-14 11:46:16,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-12-14 11:46:16,569 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:46:16,570 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-12-14 11:46:16,570 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-14 11:46:16,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:46:16,574 INFO L85 PathProgramCache]: Analyzing trace with hash 130425256, now seen corresponding path program 1 times [2022-12-14 11:46:16,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:46:16,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321593559] [2022-12-14 11:46:16,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:46:16,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:46:16,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:46:16,861 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 11:46:16,861 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:46:16,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321593559] [2022-12-14 11:46:16,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321593559] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:46:16,862 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:46:16,863 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 11:46:16,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118852039] [2022-12-14 11:46:16,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:46:16,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 11:46:16,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:46:16,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 11:46:16,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 11:46:16,901 INFO L87 Difference]: Start difference. First operand has 58 states, 33 states have (on average 1.8181818181818181) internal successors, (60), 53 states have internal predecessors, (60), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 4 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:46:17,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:46:17,027 INFO L93 Difference]: Finished difference Result 118 states and 139 transitions. [2022-12-14 11:46:17,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 11:46:17,029 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-12-14 11:46:17,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:46:17,037 INFO L225 Difference]: With dead ends: 118 [2022-12-14 11:46:17,037 INFO L226 Difference]: Without dead ends: 115 [2022-12-14 11:46:17,038 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 11:46:17,041 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 101 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 11:46:17,042 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 112 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 11:46:17,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-12-14 11:46:17,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 89. [2022-12-14 11:46:17,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 62 states have (on average 1.6451612903225807) internal successors, (102), 79 states have internal predecessors, (102), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2022-12-14 11:46:17,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 120 transitions. [2022-12-14 11:46:17,080 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 120 transitions. Word has length 5 [2022-12-14 11:46:17,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:46:17,081 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 120 transitions. [2022-12-14 11:46:17,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:46:17,081 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 120 transitions. [2022-12-14 11:46:17,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-12-14 11:46:17,082 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:46:17,082 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-12-14 11:46:17,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 11:46:17,083 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-14 11:46:17,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:46:17,084 INFO L85 PathProgramCache]: Analyzing trace with hash 130425257, now seen corresponding path program 1 times [2022-12-14 11:46:17,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:46:17,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576301013] [2022-12-14 11:46:17,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:46:17,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:46:17,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:46:17,249 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 11:46:17,249 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:46:17,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576301013] [2022-12-14 11:46:17,249 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576301013] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:46:17,249 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:46:17,249 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 11:46:17,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130923081] [2022-12-14 11:46:17,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:46:17,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 11:46:17,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:46:17,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 11:46:17,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 11:46:17,251 INFO L87 Difference]: Start difference. First operand 89 states and 120 transitions. Second operand has 5 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:46:17,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:46:17,366 INFO L93 Difference]: Finished difference Result 214 states and 301 transitions. [2022-12-14 11:46:17,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 11:46:17,367 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-12-14 11:46:17,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:46:17,369 INFO L225 Difference]: With dead ends: 214 [2022-12-14 11:46:17,369 INFO L226 Difference]: Without dead ends: 214 [2022-12-14 11:46:17,370 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-12-14 11:46:17,371 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 117 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 11:46:17,372 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 197 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 11:46:17,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2022-12-14 11:46:17,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 163. [2022-12-14 11:46:17,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 128 states have (on average 1.6484375) internal successors, (211), 145 states have internal predecessors, (211), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (34), 11 states have call predecessors, (34), 11 states have call successors, (34) [2022-12-14 11:46:17,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 256 transitions. [2022-12-14 11:46:17,394 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 256 transitions. Word has length 5 [2022-12-14 11:46:17,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:46:17,394 INFO L495 AbstractCegarLoop]: Abstraction has 163 states and 256 transitions. [2022-12-14 11:46:17,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:46:17,394 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 256 transitions. [2022-12-14 11:46:17,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 11:46:17,395 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:46:17,395 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-14 11:46:17,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 11:46:17,395 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-14 11:46:17,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:46:17,396 INFO L85 PathProgramCache]: Analyzing trace with hash -251784379, now seen corresponding path program 1 times [2022-12-14 11:46:17,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:46:17,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919552448] [2022-12-14 11:46:17,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:46:17,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:46:17,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:46:17,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:46:17,604 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:46:17,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919552448] [2022-12-14 11:46:17,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919552448] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:46:17,604 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:46:17,604 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 11:46:17,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310189048] [2022-12-14 11:46:17,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:46:17,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 11:46:17,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:46:17,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 11:46:17,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 11:46:17,606 INFO L87 Difference]: Start difference. First operand 163 states and 256 transitions. Second operand has 5 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:46:17,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:46:17,733 INFO L93 Difference]: Finished difference Result 237 states and 341 transitions. [2022-12-14 11:46:17,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 11:46:17,734 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-12-14 11:46:17,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:46:17,736 INFO L225 Difference]: With dead ends: 237 [2022-12-14 11:46:17,736 INFO L226 Difference]: Without dead ends: 237 [2022-12-14 11:46:17,737 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-12-14 11:46:17,738 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 132 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 11:46:17,739 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 154 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 11:46:17,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2022-12-14 11:46:17,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 166. [2022-12-14 11:46:17,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 131 states have (on average 1.633587786259542) internal successors, (214), 148 states have internal predecessors, (214), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (34), 11 states have call predecessors, (34), 11 states have call successors, (34) [2022-12-14 11:46:17,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 259 transitions. [2022-12-14 11:46:17,759 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 259 transitions. Word has length 6 [2022-12-14 11:46:17,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:46:17,759 INFO L495 AbstractCegarLoop]: Abstraction has 166 states and 259 transitions. [2022-12-14 11:46:17,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:46:17,759 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 259 transitions. [2022-12-14 11:46:17,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-14 11:46:17,760 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:46:17,760 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:46:17,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 11:46:17,760 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-14 11:46:17,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:46:17,761 INFO L85 PathProgramCache]: Analyzing trace with hash 784618888, now seen corresponding path program 1 times [2022-12-14 11:46:17,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:46:17,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362589315] [2022-12-14 11:46:17,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:46:17,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:46:17,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:46:17,932 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 11:46:17,933 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:46:17,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362589315] [2022-12-14 11:46:17,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362589315] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:46:17,933 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:46:17,933 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 11:46:17,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008868938] [2022-12-14 11:46:17,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:46:17,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 11:46:17,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:46:17,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 11:46:17,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 11:46:17,934 INFO L87 Difference]: Start difference. First operand 166 states and 259 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:46:18,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:46:18,042 INFO L93 Difference]: Finished difference Result 216 states and 302 transitions. [2022-12-14 11:46:18,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 11:46:18,043 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-12-14 11:46:18,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:46:18,045 INFO L225 Difference]: With dead ends: 216 [2022-12-14 11:46:18,045 INFO L226 Difference]: Without dead ends: 216 [2022-12-14 11:46:18,045 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-12-14 11:46:18,046 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 117 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 11:46:18,047 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 175 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 11:46:18,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2022-12-14 11:46:18,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 166. [2022-12-14 11:46:18,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 131 states have (on average 1.618320610687023) internal successors, (212), 148 states have internal predecessors, (212), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (34), 11 states have call predecessors, (34), 11 states have call successors, (34) [2022-12-14 11:46:18,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 257 transitions. [2022-12-14 11:46:18,060 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 257 transitions. Word has length 7 [2022-12-14 11:46:18,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:46:18,060 INFO L495 AbstractCegarLoop]: Abstraction has 166 states and 257 transitions. [2022-12-14 11:46:18,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:46:18,060 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 257 transitions. [2022-12-14 11:46:18,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-12-14 11:46:18,061 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:46:18,061 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:46:18,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-14 11:46:18,061 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-14 11:46:18,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:46:18,062 INFO L85 PathProgramCache]: Analyzing trace with hash -1446618201, now seen corresponding path program 1 times [2022-12-14 11:46:18,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:46:18,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043872099] [2022-12-14 11:46:18,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:46:18,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:46:18,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:46:18,123 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 11:46:18,124 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:46:18,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043872099] [2022-12-14 11:46:18,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043872099] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:46:18,124 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:46:18,124 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 11:46:18,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860885838] [2022-12-14 11:46:18,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:46:18,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 11:46:18,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:46:18,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 11:46:18,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 11:46:18,126 INFO L87 Difference]: Start difference. First operand 166 states and 257 transitions. Second operand has 5 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:46:18,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:46:18,208 INFO L93 Difference]: Finished difference Result 244 states and 338 transitions. [2022-12-14 11:46:18,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 11:46:18,208 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-12-14 11:46:18,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:46:18,210 INFO L225 Difference]: With dead ends: 244 [2022-12-14 11:46:18,210 INFO L226 Difference]: Without dead ends: 244 [2022-12-14 11:46:18,210 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-12-14 11:46:18,211 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 169 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 11:46:18,212 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [169 Valid, 160 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 11:46:18,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2022-12-14 11:46:18,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 201. [2022-12-14 11:46:18,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 164 states have (on average 1.5914634146341464) internal successors, (261), 182 states have internal predecessors, (261), 11 states have call successors, (11), 7 states have call predecessors, (11), 8 states have return successors, (34), 11 states have call predecessors, (34), 11 states have call successors, (34) [2022-12-14 11:46:18,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 306 transitions. [2022-12-14 11:46:18,224 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 306 transitions. Word has length 8 [2022-12-14 11:46:18,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:46:18,225 INFO L495 AbstractCegarLoop]: Abstraction has 201 states and 306 transitions. [2022-12-14 11:46:18,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:46:18,225 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 306 transitions. [2022-12-14 11:46:18,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-12-14 11:46:18,225 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:46:18,225 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:46:18,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-14 11:46:18,226 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting parse_inputErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-14 11:46:18,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:46:18,226 INFO L85 PathProgramCache]: Analyzing trace with hash -1895491222, now seen corresponding path program 1 times [2022-12-14 11:46:18,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:46:18,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455224246] [2022-12-14 11:46:18,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:46:18,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:46:18,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:46:18,316 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 11:46:18,317 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:46:18,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455224246] [2022-12-14 11:46:18,317 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455224246] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:46:18,317 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:46:18,317 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 11:46:18,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402385628] [2022-12-14 11:46:18,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:46:18,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 11:46:18,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:46:18,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 11:46:18,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 11:46:18,318 INFO L87 Difference]: Start difference. First operand 201 states and 306 transitions. Second operand has 5 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:46:18,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:46:18,398 INFO L93 Difference]: Finished difference Result 239 states and 321 transitions. [2022-12-14 11:46:18,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 11:46:18,399 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-12-14 11:46:18,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:46:18,400 INFO L225 Difference]: With dead ends: 239 [2022-12-14 11:46:18,400 INFO L226 Difference]: Without dead ends: 239 [2022-12-14 11:46:18,401 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-12-14 11:46:18,401 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 155 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 11:46:18,402 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [155 Valid, 182 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 11:46:18,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2022-12-14 11:46:18,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 211. [2022-12-14 11:46:18,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 173 states have (on average 1.583815028901734) internal successors, (274), 192 states have internal predecessors, (274), 11 states have call successors, (11), 7 states have call predecessors, (11), 9 states have return successors, (34), 11 states have call predecessors, (34), 11 states have call successors, (34) [2022-12-14 11:46:18,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 319 transitions. [2022-12-14 11:46:18,413 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 319 transitions. Word has length 9 [2022-12-14 11:46:18,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:46:18,413 INFO L495 AbstractCegarLoop]: Abstraction has 211 states and 319 transitions. [2022-12-14 11:46:18,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:46:18,413 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 319 transitions. [2022-12-14 11:46:18,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-12-14 11:46:18,414 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:46:18,414 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:46:18,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-14 11:46:18,414 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-14 11:46:18,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:46:18,415 INFO L85 PathProgramCache]: Analyzing trace with hash -354750800, now seen corresponding path program 1 times [2022-12-14 11:46:18,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:46:18,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636381662] [2022-12-14 11:46:18,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:46:18,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:46:18,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:46:18,549 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 11:46:18,549 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:46:18,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636381662] [2022-12-14 11:46:18,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636381662] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:46:18,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580746174] [2022-12-14 11:46:18,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:46:18,550 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:46:18,550 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:46:18,551 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:46:18,553 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 11:46:18,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:46:18,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 11:46:18,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:46:18,752 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 11:46:18,752 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:46:18,842 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 11:46:18,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [580746174] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:46:18,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1010165394] [2022-12-14 11:46:18,861 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-12-14 11:46:18,861 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:46:18,865 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:46:18,871 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:46:18,871 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:46:18,952 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 157 for LOIs [2022-12-14 11:46:20,713 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:46:23,140 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2449#(and (<= |parse_input_~input#1.offset| 0) (= 6 |~#commands~0.base|) (<= 0 ~global~0.offset) (<= 3 |parse_input_~input#1.base|) (<= 0 |parse_input_~input#1.offset|) (<= 0 ~global~0.base) (<= |parse_input_~input#1.base| 3) (= |parse_input_#in~input#1.base| 3) (= |~#commands~0.offset| 0) (<= ~global~0.offset 0) (not (<= (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset| 4) (select |#length| |~#commands~0.base|))) (<= ~global~0.base 0) (= |old(~global~0.base)| 0) (= |#NULL.offset| 0) (< |parse_input_~i~0#1| 2) (= |parse_input_#in~input#1.offset| 0) (= |old(~global~0.offset)| 0) (<= 0 |#StackHeapBarrier|) (<= 0 |parse_input_~i~0#1|) (= |#NULL.base| 0))' at error location [2022-12-14 11:46:23,141 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 11:46:23,141 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 11:46:23,141 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3, 3] total 11 [2022-12-14 11:46:23,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095890675] [2022-12-14 11:46:23,141 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 11:46:23,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-14 11:46:23,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:46:23,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-14 11:46:23,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2022-12-14 11:46:23,142 INFO L87 Difference]: Start difference. First operand 211 states and 319 transitions. Second operand has 13 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:46:23,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:46:23,330 INFO L93 Difference]: Finished difference Result 293 states and 406 transitions. [2022-12-14 11:46:23,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 11:46:23,330 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 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 11:46:23,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:46:23,332 INFO L225 Difference]: With dead ends: 293 [2022-12-14 11:46:23,332 INFO L226 Difference]: Without dead ends: 293 [2022-12-14 11:46:23,333 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2022-12-14 11:46:23,333 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 390 mSDsluCounter, 292 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 390 SdHoareTripleChecker+Valid, 381 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 11:46:23,333 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [390 Valid, 381 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 11:46:23,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2022-12-14 11:46:23,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 223. [2022-12-14 11:46:23,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 182 states have (on average 1.5054945054945055) internal successors, (274), 204 states have internal predecessors, (274), 11 states have call successors, (11), 7 states have call predecessors, (11), 12 states have return successors, (44), 11 states have call predecessors, (44), 11 states have call successors, (44) [2022-12-14 11:46:23,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 329 transitions. [2022-12-14 11:46:23,342 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 329 transitions. Word has length 13 [2022-12-14 11:46:23,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:46:23,342 INFO L495 AbstractCegarLoop]: Abstraction has 223 states and 329 transitions. [2022-12-14 11:46:23,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:46:23,342 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 329 transitions. [2022-12-14 11:46:23,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-12-14 11:46:23,343 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:46:23,343 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:46:23,348 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 11:46:23,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:46:23,545 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-14 11:46:23,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:46:23,547 INFO L85 PathProgramCache]: Analyzing trace with hash 1887627038, now seen corresponding path program 1 times [2022-12-14 11:46:23,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:46:23,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911134232] [2022-12-14 11:46:23,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:46:23,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:46:23,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:46:23,791 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:46:23,791 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:46:23,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911134232] [2022-12-14 11:46:23,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911134232] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:46:23,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115616489] [2022-12-14 11:46:23,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:46:23,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:46:23,792 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:46:23,792 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:46:23,793 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 11:46:23,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:46:23,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-14 11:46:23,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:46:23,945 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 11:46:23,951 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:46:23,952 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:46:24,003 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:46:24,003 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1115616489] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:46:24,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [957229222] [2022-12-14 11:46:24,006 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-12-14 11:46:24,006 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:46:24,006 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:46:24,006 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:46:24,006 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:46:24,025 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 157 for LOIs [2022-12-14 11:46:25,072 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:46:28,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [957229222] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:46:28,072 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 11:46:28,073 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5, 4, 4] total 18 [2022-12-14 11:46:28,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470998055] [2022-12-14 11:46:28,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:46:28,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 11:46:28,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:46:28,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 11:46:28,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2022-12-14 11:46:28,076 INFO L87 Difference]: Start difference. First operand 223 states and 329 transitions. Second operand has 8 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:46:28,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:46:28,899 INFO L93 Difference]: Finished difference Result 211 states and 290 transitions. [2022-12-14 11:46:28,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 11:46:28,900 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-12-14 11:46:28,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:46:28,901 INFO L225 Difference]: With dead ends: 211 [2022-12-14 11:46:28,901 INFO L226 Difference]: Without dead ends: 211 [2022-12-14 11:46:28,901 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 22 SyntacticMatches, 6 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2022-12-14 11:46:28,902 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 33 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 11:46:28,902 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 129 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 11:46:28,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2022-12-14 11:46:28,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 205. [2022-12-14 11:46:28,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 169 states have (on average 1.485207100591716) internal successors, (251), 192 states have internal predecessors, (251), 7 states have call successors, (7), 5 states have call predecessors, (7), 11 states have return successors, (26), 7 states have call predecessors, (26), 7 states have call successors, (26) [2022-12-14 11:46:28,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 284 transitions. [2022-12-14 11:46:28,911 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 284 transitions. Word has length 14 [2022-12-14 11:46:28,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:46:28,911 INFO L495 AbstractCegarLoop]: Abstraction has 205 states and 284 transitions. [2022-12-14 11:46:28,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:46:28,911 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 284 transitions. [2022-12-14 11:46:28,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-12-14 11:46:28,912 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:46:28,912 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:46:28,917 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 11:46:29,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:46:29,114 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-14 11:46:29,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:46:29,114 INFO L85 PathProgramCache]: Analyzing trace with hash 351522922, now seen corresponding path program 1 times [2022-12-14 11:46:29,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:46:29,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988373277] [2022-12-14 11:46:29,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:46:29,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:46:29,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:46:29,161 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:46:29,161 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:46:29,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988373277] [2022-12-14 11:46:29,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988373277] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:46:29,161 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:46:29,161 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 11:46:29,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8598074] [2022-12-14 11:46:29,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:46:29,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 11:46:29,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:46:29,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 11:46:29,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 11:46:29,163 INFO L87 Difference]: Start difference. First operand 205 states and 284 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 11:46:29,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:46:29,173 INFO L93 Difference]: Finished difference Result 211 states and 288 transitions. [2022-12-14 11:46:29,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 11:46:29,174 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2022-12-14 11:46:29,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:46:29,175 INFO L225 Difference]: With dead ends: 211 [2022-12-14 11:46:29,175 INFO L226 Difference]: Without dead ends: 211 [2022-12-14 11:46:29,175 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 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 11:46:29,176 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 13 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 11:46:29,176 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 112 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 11:46:29,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2022-12-14 11:46:29,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 205. [2022-12-14 11:46:29,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 169 states have (on average 1.467455621301775) internal successors, (248), 192 states have internal predecessors, (248), 7 states have call successors, (7), 5 states have call predecessors, (7), 11 states have return successors, (26), 7 states have call predecessors, (26), 7 states have call successors, (26) [2022-12-14 11:46:29,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 281 transitions. [2022-12-14 11:46:29,181 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 281 transitions. Word has length 23 [2022-12-14 11:46:29,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:46:29,181 INFO L495 AbstractCegarLoop]: Abstraction has 205 states and 281 transitions. [2022-12-14 11:46:29,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 11:46:29,182 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 281 transitions. [2022-12-14 11:46:29,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-12-14 11:46:29,182 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:46:29,182 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:46:29,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-14 11:46:29,182 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-14 11:46:29,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:46:29,183 INFO L85 PathProgramCache]: Analyzing trace with hash -1643273810, now seen corresponding path program 1 times [2022-12-14 11:46:29,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:46:29,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922931952] [2022-12-14 11:46:29,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:46:29,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:46:29,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:46:29,361 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:46:29,362 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:46:29,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922931952] [2022-12-14 11:46:29,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922931952] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:46:29,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666304616] [2022-12-14 11:46:29,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:46:29,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:46:29,362 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:46:29,363 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:46:29,364 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 11:46:29,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:46:29,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-14 11:46:29,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:46:29,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:46:29,605 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-12-14 11:46:29,649 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:46:29,649 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:46:29,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1666304616] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:46:29,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [121498393] [2022-12-14 11:46:29,751 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2022-12-14 11:46:29,752 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:46:29,752 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:46:29,752 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:46:29,752 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:46:29,857 INFO L321 Elim1Store]: treesize reduction 46, result has 64.6 percent of original size [2022-12-14 11:46:29,857 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 111 [2022-12-14 11:46:30,070 INFO L321 Elim1Store]: treesize reduction 118, result has 27.2 percent of original size [2022-12-14 11:46:30,071 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 35 treesize of output 61 [2022-12-14 11:46:30,298 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 187 for LOIs [2022-12-14 11:46:30,957 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:46:39,938 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4017#(and (= ~global~0.base |old(~global~0.base)|) (= |old(#length)| |#length|) (<= 0 |#NULL.base|) (<= 0 |old(~global~0.offset)|) (<= 6 |~#commands~0.base|) (= ~state~0 |old(~state~0)|) (<= 0 ~global~0.offset) (<= |#NULL.offset| 0) (= |parse_input_#in~input#1.base| |parse_input_~input#1.base|) (<= |~#commands~0.base| 6) (<= 0 |parse_input_#in~input#1.offset|) (= |parse_input_#in~input#1.offset| |parse_input_~input#1.offset|) (= |parse_input_#in~input#1.base| 4) (<= 0 |~#commands~0.offset|) (= |parse_input_~i~0#1| 0) (<= |parse_input_#in~input#1.offset| 0) (<= ~global~0.offset 0) (<= |#NULL.base| 0) (not (<= (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset| 4) (select |#length| |~#commands~0.base|))) (= |old(#valid)| |#valid|) (<= 0 |#NULL.offset|) (<= |old(~global~0.offset)| 0) (<= 0 |#StackHeapBarrier|) (<= |~#commands~0.offset| 0))' at error location [2022-12-14 11:46:39,938 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 11:46:39,938 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 11:46:39,938 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 12 [2022-12-14 11:46:39,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716163101] [2022-12-14 11:46:39,938 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 11:46:39,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-14 11:46:39,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:46:39,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-14 11:46:39,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=937, Unknown=1, NotChecked=0, Total=1190 [2022-12-14 11:46:39,940 INFO L87 Difference]: Start difference. First operand 205 states and 281 transitions. Second operand has 14 states, 11 states have (on average 4.0) internal successors, (44), 11 states have internal predecessors, (44), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 11:46:40,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:46:40,473 INFO L93 Difference]: Finished difference Result 320 states and 431 transitions. [2022-12-14 11:46:40,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-14 11:46:40,474 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 11 states have (on average 4.0) internal successors, (44), 11 states have internal predecessors, (44), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 25 [2022-12-14 11:46:40,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:46:40,476 INFO L225 Difference]: With dead ends: 320 [2022-12-14 11:46:40,476 INFO L226 Difference]: Without dead ends: 320 [2022-12-14 11:46:40,476 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 585 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=407, Invalid=1662, Unknown=1, NotChecked=0, Total=2070 [2022-12-14 11:46:40,477 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 699 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 115 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 699 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 11:46:40,477 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [699 Valid, 173 Invalid, 362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 246 Invalid, 1 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 11:46:40,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2022-12-14 11:46:40,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 220. [2022-12-14 11:46:40,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 184 states have (on average 1.4728260869565217) internal successors, (271), 207 states have internal predecessors, (271), 7 states have call successors, (7), 5 states have call predecessors, (7), 11 states have return successors, (26), 7 states have call predecessors, (26), 7 states have call successors, (26) [2022-12-14 11:46:40,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 304 transitions. [2022-12-14 11:46:40,483 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 304 transitions. Word has length 25 [2022-12-14 11:46:40,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:46:40,483 INFO L495 AbstractCegarLoop]: Abstraction has 220 states and 304 transitions. [2022-12-14 11:46:40,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 11 states have (on average 4.0) internal successors, (44), 11 states have internal predecessors, (44), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 11:46:40,484 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 304 transitions. [2022-12-14 11:46:40,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-12-14 11:46:40,484 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:46:40,484 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:46:40,490 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 11:46:40,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-14 11:46:40,685 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-14 11:46:40,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:46:40,685 INFO L85 PathProgramCache]: Analyzing trace with hash 1123038032, now seen corresponding path program 1 times [2022-12-14 11:46:40,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:46:40,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676557798] [2022-12-14 11:46:40,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:46:40,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:46:40,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:46:40,748 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:46:40,748 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:46:40,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676557798] [2022-12-14 11:46:40,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676557798] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:46:40,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055426056] [2022-12-14 11:46:40,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:46:40,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:46:40,749 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:46:40,750 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:46:40,751 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 11:46:40,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:46:40,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 11:46:40,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:46:40,883 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:46:40,883 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:46:40,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1055426056] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:46:40,883 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 11:46:40,883 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 8 [2022-12-14 11:46:40,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284742053] [2022-12-14 11:46:40,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:46:40,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 11:46:40,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:46:40,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 11:46:40,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-12-14 11:46:40,885 INFO L87 Difference]: Start difference. First operand 220 states and 304 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 11:46:40,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:46:40,940 INFO L93 Difference]: Finished difference Result 266 states and 357 transitions. [2022-12-14 11:46:40,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 11:46:40,941 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2022-12-14 11:46:40,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:46:40,942 INFO L225 Difference]: With dead ends: 266 [2022-12-14 11:46:40,943 INFO L226 Difference]: Without dead ends: 266 [2022-12-14 11:46:40,943 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-12-14 11:46:40,943 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 101 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 11:46:40,944 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 141 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 11:46:40,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-12-14 11:46:40,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 224. [2022-12-14 11:46:40,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 188 states have (on average 1.4627659574468086) internal successors, (275), 211 states have internal predecessors, (275), 7 states have call successors, (7), 5 states have call predecessors, (7), 11 states have return successors, (26), 7 states have call predecessors, (26), 7 states have call successors, (26) [2022-12-14 11:46:40,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 308 transitions. [2022-12-14 11:46:40,953 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 308 transitions. Word has length 26 [2022-12-14 11:46:40,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:46:40,953 INFO L495 AbstractCegarLoop]: Abstraction has 224 states and 308 transitions. [2022-12-14 11:46:40,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 11:46:40,954 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 308 transitions. [2022-12-14 11:46:40,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-12-14 11:46:40,954 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:46:40,954 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:46:40,960 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 11:46:41,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-12-14 11:46:41,155 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-14 11:46:41,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:46:41,156 INFO L85 PathProgramCache]: Analyzing trace with hash 1361832013, now seen corresponding path program 1 times [2022-12-14 11:46:41,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:46:41,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054265275] [2022-12-14 11:46:41,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:46:41,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:46:41,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:46:41,531 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:46:41,531 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:46:41,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054265275] [2022-12-14 11:46:41,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054265275] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:46:41,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978297780] [2022-12-14 11:46:41,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:46:41,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:46:41,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:46:41,533 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:46:41,533 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 11:46:41,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:46:41,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-14 11:46:41,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:46:41,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:46:41,802 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-12-14 11:46:41,876 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 11:46:41,879 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 11:46:41,897 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:46:41,898 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:46:42,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [978297780] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:46:42,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [102877292] [2022-12-14 11:46:42,025 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2022-12-14 11:46:42,025 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:46:42,025 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:46:42,025 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:46:42,026 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:46:42,119 INFO L321 Elim1Store]: treesize reduction 46, result has 64.6 percent of original size [2022-12-14 11:46:42,120 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 111 [2022-12-14 11:46:42,298 INFO L321 Elim1Store]: treesize reduction 118, result has 27.2 percent of original size [2022-12-14 11:46:42,298 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 35 treesize of output 61 [2022-12-14 11:46:42,462 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 187 for LOIs [2022-12-14 11:46:43,185 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:46:52,421 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5293#(and (= ~global~0.base |old(~global~0.base)|) (= |old(#length)| |#length|) (<= 0 |#NULL.base|) (<= 0 |old(~global~0.offset)|) (<= 6 |~#commands~0.base|) (= ~state~0 |old(~state~0)|) (<= 0 ~global~0.offset) (<= |#NULL.offset| 0) (= (select (select |#memory_$Pointer$.offset| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset|)) |parse_input_#t~mem3#1.offset|) (= |parse_input_#in~input#1.base| |parse_input_~input#1.base|) (<= (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset| 4) (select |#length| |~#commands~0.base|)) (<= |~#commands~0.base| 6) (<= 0 |parse_input_#in~input#1.offset|) (= |parse_input_#in~input#1.offset| |parse_input_~input#1.offset|) (= |parse_input_#in~input#1.base| 4) (<= 0 |~#commands~0.offset|) (= (select |#valid| |parse_input_#t~mem3#1.base|) 1) (= |parse_input_#t~mem3#1.base| (select (select |#memory_$Pointer$.base| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset|))) (= |parse_input_~i~0#1| 0) (<= |parse_input_#in~input#1.offset| 0) (<= ~global~0.offset 0) (<= |#NULL.base| 0) (or (not (< |parse_input_#t~mem3#1.offset| (select |#length| |parse_input_#t~mem3#1.base|))) (not (<= 0 |parse_input_#t~mem3#1.offset|))) (= |old(#valid)| |#valid|) (<= 0 |#NULL.offset|) (<= |old(~global~0.offset)| 0) (<= 0 |#StackHeapBarrier|) (<= |~#commands~0.offset| 0) (= (select |#valid| |~#commands~0.base|) 1))' at error location [2022-12-14 11:46:52,421 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 11:46:52,421 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 11:46:52,421 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6] total 17 [2022-12-14 11:46:52,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091174682] [2022-12-14 11:46:52,421 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 11:46:52,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-14 11:46:52,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:46:52,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-14 11:46:52,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=313, Invalid=1168, Unknown=1, NotChecked=0, Total=1482 [2022-12-14 11:46:52,423 INFO L87 Difference]: Start difference. First operand 224 states and 308 transitions. Second operand has 18 states, 15 states have (on average 3.2) internal successors, (48), 15 states have internal predecessors, (48), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 11:46:52,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:46:52,922 INFO L93 Difference]: Finished difference Result 264 states and 353 transitions. [2022-12-14 11:46:52,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-14 11:46:52,922 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 15 states have (on average 3.2) internal successors, (48), 15 states have internal predecessors, (48), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 27 [2022-12-14 11:46:52,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:46:52,923 INFO L225 Difference]: With dead ends: 264 [2022-12-14 11:46:52,923 INFO L226 Difference]: Without dead ends: 264 [2022-12-14 11:46:52,924 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 790 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=474, Invalid=1973, Unknown=3, NotChecked=0, Total=2450 [2022-12-14 11:46:52,924 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 522 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 106 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 522 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 11:46:52,924 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [522 Valid, 245 Invalid, 385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 274 Invalid, 5 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 11:46:52,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2022-12-14 11:46:52,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 224. [2022-12-14 11:46:52,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 188 states have (on average 1.452127659574468) internal successors, (273), 211 states have internal predecessors, (273), 7 states have call successors, (7), 5 states have call predecessors, (7), 11 states have return successors, (26), 7 states have call predecessors, (26), 7 states have call successors, (26) [2022-12-14 11:46:52,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 306 transitions. [2022-12-14 11:46:52,929 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 306 transitions. Word has length 27 [2022-12-14 11:46:52,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:46:52,929 INFO L495 AbstractCegarLoop]: Abstraction has 224 states and 306 transitions. [2022-12-14 11:46:52,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 15 states have (on average 3.2) internal successors, (48), 15 states have internal predecessors, (48), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 11:46:52,930 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 306 transitions. [2022-12-14 11:46:52,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-12-14 11:46:52,930 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:46:52,930 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:46:52,934 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 11:46:53,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:46:53,132 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-14 11:46:53,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:46:53,133 INFO L85 PathProgramCache]: Analyzing trace with hash -732880510, now seen corresponding path program 1 times [2022-12-14 11:46:53,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:46:53,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537674727] [2022-12-14 11:46:53,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:46:53,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:46:53,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:46:53,313 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:46:53,313 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:46:53,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537674727] [2022-12-14 11:46:53,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537674727] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:46:53,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589434644] [2022-12-14 11:46:53,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:46:53,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:46:53,314 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:46:53,315 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:46:53,316 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 11:46:53,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:46:53,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 11:46:53,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:46:53,440 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 11:46:53,441 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-12-14 11:46:53,475 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:46:53,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:46:53,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [589434644] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:46:53,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1041462631] [2022-12-14 11:46:53,511 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2022-12-14 11:46:53,512 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:46:53,512 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:46:53,512 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:46:53,512 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:46:53,601 INFO L321 Elim1Store]: treesize reduction 46, result has 64.6 percent of original size [2022-12-14 11:46:53,602 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 111 [2022-12-14 11:46:53,780 INFO L321 Elim1Store]: treesize reduction 118, result has 27.2 percent of original size [2022-12-14 11:46:53,781 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 35 treesize of output 61 [2022-12-14 11:46:53,965 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 187 for LOIs [2022-12-14 11:46:54,614 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:47:03,561 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5940#(and (= ~global~0.base |old(~global~0.base)|) (= |old(#length)| |#length|) (<= 0 |#NULL.base|) (<= 0 |old(~global~0.offset)|) (<= 6 |~#commands~0.base|) (not (= (select |#valid| |parse_input_~input#1.base|) 1)) (= ~state~0 |old(~state~0)|) (<= 0 ~global~0.offset) (< |parse_input_#t~mem3#1.offset| (select |#length| |parse_input_#t~mem3#1.base|)) (<= |#NULL.offset| 0) (= (select (select |#memory_$Pointer$.offset| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset|)) |parse_input_#t~mem3#1.offset|) (= |parse_input_#in~input#1.base| |parse_input_~input#1.base|) (<= (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset| 4) (select |#length| |~#commands~0.base|)) (<= |~#commands~0.base| 6) (<= 0 |parse_input_#in~input#1.offset|) (= |parse_input_#in~input#1.offset| |parse_input_~input#1.offset|) (<= 0 |parse_input_#t~mem3#1.offset|) (= |parse_input_#in~input#1.base| 4) (<= 0 |~#commands~0.offset|) (= (select |#valid| |parse_input_#t~mem3#1.base|) 1) (= |parse_input_#t~mem3#1.base| (select (select |#memory_$Pointer$.base| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset|))) (= |parse_input_~i~0#1| 0) (<= |parse_input_#in~input#1.offset| 0) (<= ~global~0.offset 0) (<= |#NULL.base| 0) (= |old(#valid)| |#valid|) (<= 0 |#NULL.offset|) (<= |old(~global~0.offset)| 0) (<= 0 |#StackHeapBarrier|) (<= |~#commands~0.offset| 0) (= (select |#valid| |~#commands~0.base|) 1))' at error location [2022-12-14 11:47:03,562 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 11:47:03,562 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 11:47:03,562 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2022-12-14 11:47:03,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319022695] [2022-12-14 11:47:03,562 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 11:47:03,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-14 11:47:03,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:47:03,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-14 11:47:03,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=698, Unknown=0, NotChecked=0, Total=930 [2022-12-14 11:47:03,564 INFO L87 Difference]: Start difference. First operand 224 states and 306 transitions. Second operand has 12 states, 10 states have (on average 4.9) internal successors, (49), 9 states have internal predecessors, (49), 1 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-14 11:47:03,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:47:03,934 INFO L93 Difference]: Finished difference Result 336 states and 428 transitions. [2022-12-14 11:47:03,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 11:47:03,935 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 4.9) internal successors, (49), 9 states have internal predecessors, (49), 1 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 28 [2022-12-14 11:47:03,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:47:03,936 INFO L225 Difference]: With dead ends: 336 [2022-12-14 11:47:03,936 INFO L226 Difference]: Without dead ends: 336 [2022-12-14 11:47:03,936 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=340, Invalid=1142, Unknown=0, NotChecked=0, Total=1482 [2022-12-14 11:47:03,937 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 417 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 19 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 417 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 11:47:03,937 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [417 Valid, 341 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 260 Invalid, 2 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 11:47:03,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2022-12-14 11:47:03,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 289. [2022-12-14 11:47:03,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 250 states have (on average 1.428) internal successors, (357), 274 states have internal predecessors, (357), 7 states have call successors, (7), 7 states have call predecessors, (7), 14 states have return successors, (26), 7 states have call predecessors, (26), 7 states have call successors, (26) [2022-12-14 11:47:03,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 390 transitions. [2022-12-14 11:47:03,942 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 390 transitions. Word has length 28 [2022-12-14 11:47:03,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:47:03,942 INFO L495 AbstractCegarLoop]: Abstraction has 289 states and 390 transitions. [2022-12-14 11:47:03,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 4.9) internal successors, (49), 9 states have internal predecessors, (49), 1 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-14 11:47:03,942 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 390 transitions. [2022-12-14 11:47:03,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-12-14 11:47:03,943 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:47:03,943 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:47:03,947 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 11:47:04,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-12-14 11:47:04,145 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting parse_inputErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-14 11:47:04,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:47:04,146 INFO L85 PathProgramCache]: Analyzing trace with hash -1244459281, now seen corresponding path program 1 times [2022-12-14 11:47:04,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:47:04,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419559581] [2022-12-14 11:47:04,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:47:04,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:47:04,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:47:04,321 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:47:04,321 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:47:04,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419559581] [2022-12-14 11:47:04,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419559581] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:47:04,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836599602] [2022-12-14 11:47:04,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:47:04,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:47:04,321 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:47:04,322 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:47:04,323 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 11:47:04,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:47:04,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-14 11:47:04,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:47:04,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:47:04,455 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-12-14 11:47:04,507 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:47:04,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:47:04,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [836599602] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:47:04,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1039238196] [2022-12-14 11:47:04,588 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2022-12-14 11:47:04,588 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:47:04,589 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:47:04,589 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:47:04,589 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:47:04,676 INFO L321 Elim1Store]: treesize reduction 46, result has 64.6 percent of original size [2022-12-14 11:47:04,677 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 111 [2022-12-14 11:47:04,838 INFO L321 Elim1Store]: treesize reduction 118, result has 27.2 percent of original size [2022-12-14 11:47:04,839 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 35 treesize of output 61 [2022-12-14 11:47:05,076 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 187 for LOIs [2022-12-14 11:47:05,747 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:47:14,602 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6729#(and (= ~global~0.base |old(~global~0.base)|) (= |old(#length)| |#length|) (<= 0 |#NULL.base|) (<= 0 |old(~global~0.offset)|) (= (select |#valid| |parse_input_~input#1.base|) 1) (<= 6 |~#commands~0.base|) (not (< |parse_input_~input#1.offset| (select |#length| |parse_input_~input#1.base|))) (= ~state~0 |old(~state~0)|) (<= 0 ~global~0.offset) (< |parse_input_#t~mem3#1.offset| (select |#length| |parse_input_#t~mem3#1.base|)) (<= |#NULL.offset| 0) (= (select (select |#memory_$Pointer$.offset| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset|)) |parse_input_#t~mem3#1.offset|) (= |parse_input_#in~input#1.base| |parse_input_~input#1.base|) (<= (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset| 4) (select |#length| |~#commands~0.base|)) (<= |~#commands~0.base| 6) (<= 0 |parse_input_#in~input#1.offset|) (= |parse_input_#in~input#1.offset| |parse_input_~input#1.offset|) (<= 0 |parse_input_#t~mem3#1.offset|) (= |parse_input_#in~input#1.base| 4) (<= 0 |~#commands~0.offset|) (= (select |#valid| |parse_input_#t~mem3#1.base|) 1) (= |parse_input_#t~mem3#1.base| (select (select |#memory_$Pointer$.base| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset|))) (= |parse_input_~i~0#1| 0) (<= |parse_input_#in~input#1.offset| 0) (<= ~global~0.offset 0) (<= |#NULL.base| 0) (= |old(#valid)| |#valid|) (<= 0 |#NULL.offset|) (<= |old(~global~0.offset)| 0) (<= 0 |#StackHeapBarrier|) (<= |~#commands~0.offset| 0) (= (select |#valid| |~#commands~0.base|) 1))' at error location [2022-12-14 11:47:14,602 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 11:47:14,602 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 11:47:14,603 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 13 [2022-12-14 11:47:14,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40652376] [2022-12-14 11:47:14,603 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 11:47:14,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-14 11:47:14,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:47:14,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-14 11:47:14,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=1084, Unknown=0, NotChecked=0, Total=1332 [2022-12-14 11:47:14,605 INFO L87 Difference]: Start difference. First operand 289 states and 390 transitions. Second operand has 15 states, 10 states have (on average 5.2) internal successors, (52), 10 states have internal predecessors, (52), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 11:47:15,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:47:15,065 INFO L93 Difference]: Finished difference Result 364 states and 452 transitions. [2022-12-14 11:47:15,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-14 11:47:15,065 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 10 states have (on average 5.2) internal successors, (52), 10 states have internal predecessors, (52), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 29 [2022-12-14 11:47:15,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:47:15,067 INFO L225 Difference]: With dead ends: 364 [2022-12-14 11:47:15,067 INFO L226 Difference]: Without dead ends: 364 [2022-12-14 11:47:15,069 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 732 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=402, Invalid=1854, Unknown=0, NotChecked=0, Total=2256 [2022-12-14 11:47:15,069 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 589 mSDsluCounter, 292 mSDsCounter, 0 mSdLazyCounter, 337 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 589 SdHoareTripleChecker+Valid, 343 SdHoareTripleChecker+Invalid, 369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 11:47:15,069 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [589 Valid, 343 Invalid, 369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 337 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 11:47:15,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2022-12-14 11:47:15,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 315. [2022-12-14 11:47:15,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 274 states have (on average 1.4416058394160585) internal successors, (395), 300 states have internal predecessors, (395), 7 states have call successors, (7), 7 states have call predecessors, (7), 16 states have return successors, (22), 7 states have call predecessors, (22), 7 states have call successors, (22) [2022-12-14 11:47:15,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 424 transitions. [2022-12-14 11:47:15,075 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 424 transitions. Word has length 29 [2022-12-14 11:47:15,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:47:15,076 INFO L495 AbstractCegarLoop]: Abstraction has 315 states and 424 transitions. [2022-12-14 11:47:15,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 10 states have (on average 5.2) internal successors, (52), 10 states have internal predecessors, (52), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 11:47:15,076 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 424 transitions. [2022-12-14 11:47:15,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-12-14 11:47:15,076 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:47:15,076 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:47:15,080 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 11:47:15,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-14 11:47:15,278 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-14 11:47:15,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:47:15,279 INFO L85 PathProgramCache]: Analyzing trace with hash 1727568309, now seen corresponding path program 1 times [2022-12-14 11:47:15,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:47:15,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896690710] [2022-12-14 11:47:15,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:47:15,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:47:15,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:47:15,488 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:47:15,488 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:47:15,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896690710] [2022-12-14 11:47:15,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896690710] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:47:15,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743308230] [2022-12-14 11:47:15,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:47:15,488 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:47:15,488 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:47:15,489 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:47:15,490 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 11:47:15,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:47:15,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-14 11:47:15,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:47:15,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:47:15,682 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-12-14 11:47:15,779 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:47:15,779 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:47:17,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [743308230] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:47:17,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1665046754] [2022-12-14 11:47:17,927 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2022-12-14 11:47:17,927 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:47:17,928 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:47:17,928 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:47:17,928 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:47:18,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:47:18,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:47:18,131 INFO L321 Elim1Store]: treesize reduction 148, result has 13.5 percent of original size [2022-12-14 11:47:18,132 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 183 treesize of output 182 [2022-12-14 11:47:18,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:47:18,185 INFO L321 Elim1Store]: treesize reduction 174, result has 23.0 percent of original size [2022-12-14 11:47:18,186 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 12 case distinctions, treesize of input 183 treesize of output 206 [2022-12-14 11:47:18,560 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 41 for LOIs [2022-12-14 11:47:18,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:47:18,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:47:18,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:47:18,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:47:18,746 INFO L321 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-12-14 11:47:18,746 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 35 [2022-12-14 11:47:18,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:47:18,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:47:18,775 INFO L321 Elim1Store]: treesize reduction 52, result has 26.8 percent of original size [2022-12-14 11:47:18,776 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 27 treesize of output 41 [2022-12-14 11:47:18,902 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:47:21,280 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7604#(and (<= |parse_input_~input#1.offset| 0) (= 6 |~#commands~0.base|) (<= 0 ~global~0.offset) (<= 3 |parse_input_~input#1.base|) (<= 0 |parse_input_~input#1.offset|) (= |~#commands~0.offset| 0) (<= ~global~0.offset 0) (not (<= (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset| 4) (select |#length| |~#commands~0.base|))) (<= |parse_input_#in~input#1.base| 4) (= |#NULL.offset| 0) (<= |parse_input_~input#1.base| 4) (< |parse_input_~i~0#1| 2) (= |parse_input_#in~input#1.offset| 0) (<= 3 |parse_input_#in~input#1.base|) (= |old(~global~0.offset)| 0) (<= 0 |#StackHeapBarrier|) (<= 0 |parse_input_~i~0#1|) (= |#NULL.base| 0))' at error location [2022-12-14 11:47:21,280 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 11:47:21,280 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 11:47:21,280 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 15 [2022-12-14 11:47:21,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129276216] [2022-12-14 11:47:21,280 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 11:47:21,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-14 11:47:21,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:47:21,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-14 11:47:21,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=1315, Unknown=2, NotChecked=0, Total=1482 [2022-12-14 11:47:21,281 INFO L87 Difference]: Start difference. First operand 315 states and 424 transitions. Second operand has 17 states, 14 states have (on average 4.285714285714286) internal successors, (60), 14 states have internal predecessors, (60), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 11:47:21,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:47:21,938 INFO L93 Difference]: Finished difference Result 402 states and 519 transitions. [2022-12-14 11:47:21,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-14 11:47:21,938 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 14 states have (on average 4.285714285714286) internal successors, (60), 14 states have internal predecessors, (60), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 33 [2022-12-14 11:47:21,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:47:21,941 INFO L225 Difference]: With dead ends: 402 [2022-12-14 11:47:21,941 INFO L226 Difference]: Without dead ends: 402 [2022-12-14 11:47:21,942 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 674 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=348, Invalid=2200, Unknown=2, NotChecked=0, Total=2550 [2022-12-14 11:47:21,943 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 572 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 432 mSolverCounterSat, 68 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 572 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 432 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 11:47:21,943 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [572 Valid, 258 Invalid, 504 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 432 Invalid, 4 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 11:47:21,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2022-12-14 11:47:21,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 193. [2022-12-14 11:47:21,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 168 states have (on average 1.3869047619047619) internal successors, (233), 184 states have internal predecessors, (233), 4 states have call successors, (4), 4 states have call predecessors, (4), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-12-14 11:47:21,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 244 transitions. [2022-12-14 11:47:21,953 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 244 transitions. Word has length 33 [2022-12-14 11:47:21,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:47:21,953 INFO L495 AbstractCegarLoop]: Abstraction has 193 states and 244 transitions. [2022-12-14 11:47:21,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 14 states have (on average 4.285714285714286) internal successors, (60), 14 states have internal predecessors, (60), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 11:47:21,954 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 244 transitions. [2022-12-14 11:47:21,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-12-14 11:47:21,955 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:47:21,955 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:47:21,959 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-14 11:47:22,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:47:22,155 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-14 11:47:22,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:47:22,156 INFO L85 PathProgramCache]: Analyzing trace with hash 2015009977, now seen corresponding path program 1 times [2022-12-14 11:47:22,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:47:22,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634342542] [2022-12-14 11:47:22,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:47:22,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:47:22,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:47:22,369 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:47:22,369 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:47:22,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634342542] [2022-12-14 11:47:22,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634342542] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:47:22,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153566453] [2022-12-14 11:47:22,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:47:22,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:47:22,370 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:47:22,371 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:47:22,371 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 11:47:22,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:47:22,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-14 11:47:22,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:47:22,592 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 11:47:22,592 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-12-14 11:47:22,689 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 11:47:22,703 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:47:22,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:47:22,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1153566453] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:47:22,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1212339053] [2022-12-14 11:47:22,784 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2022-12-14 11:47:22,784 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:47:22,784 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:47:22,785 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:47:22,785 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:47:22,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:47:22,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:47:22,942 INFO L321 Elim1Store]: treesize reduction 165, result has 19.9 percent of original size [2022-12-14 11:47:22,943 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 196 treesize of output 210 [2022-12-14 11:47:23,016 INFO L321 Elim1Store]: treesize reduction 205, result has 30.0 percent of original size [2022-12-14 11:47:23,016 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 185 treesize of output 234 [2022-12-14 11:47:23,373 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 187 for LOIs [2022-12-14 11:47:23,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:47:23,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:47:23,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:47:23,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:47:23,696 INFO L321 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-12-14 11:47:23,696 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 35 [2022-12-14 11:47:23,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:47:23,729 INFO L321 Elim1Store]: treesize reduction 70, result has 28.6 percent of original size [2022-12-14 11:47:23,729 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 27 treesize of output 45 [2022-12-14 11:47:23,848 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:47:26,361 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8402#(and (<= |parse_input_~input#1.offset| 0) (= 6 |~#commands~0.base|) (<= 0 ~global~0.offset) (<= 3 |parse_input_~input#1.base|) (<= 0 |parse_input_~input#1.offset|) (= |~#commands~0.offset| 0) (<= ~global~0.offset 0) (<= |parse_input_#in~input#1.base| 4) (= |#NULL.offset| 0) (<= |parse_input_~input#1.base| 4) (= |parse_input_#in~input#1.offset| 0) (<= 3 |parse_input_#in~input#1.base|) (= |old(~global~0.offset)| 0) (not (= (select |#valid| |parse_input_#t~mem3#1.base|) 1)) (<= 0 |#StackHeapBarrier|) (<= 0 |parse_input_~i~0#1|) (= |#NULL.base| 0))' at error location [2022-12-14 11:47:26,361 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 11:47:26,361 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 11:47:26,361 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 15 [2022-12-14 11:47:26,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380206162] [2022-12-14 11:47:26,361 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 11:47:26,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-14 11:47:26,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:47:26,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-14 11:47:26,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1234, Unknown=0, NotChecked=0, Total=1406 [2022-12-14 11:47:26,362 INFO L87 Difference]: Start difference. First operand 193 states and 244 transitions. Second operand has 17 states, 15 states have (on average 4.133333333333334) internal successors, (62), 15 states have internal predecessors, (62), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 11:47:26,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:47:26,790 INFO L93 Difference]: Finished difference Result 269 states and 315 transitions. [2022-12-14 11:47:26,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-14 11:47:26,791 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 4.133333333333334) internal successors, (62), 15 states have internal predecessors, (62), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 34 [2022-12-14 11:47:26,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:47:26,792 INFO L225 Difference]: With dead ends: 269 [2022-12-14 11:47:26,792 INFO L226 Difference]: Without dead ends: 269 [2022-12-14 11:47:26,792 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 51 SyntacticMatches, 4 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 727 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=302, Invalid=1954, Unknown=0, NotChecked=0, Total=2256 [2022-12-14 11:47:26,793 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 439 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 392 mSolverCounterSat, 37 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 439 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 392 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 11:47:26,793 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [439 Valid, 388 Invalid, 430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 392 Invalid, 1 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 11:47:26,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2022-12-14 11:47:26,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 193. [2022-12-14 11:47:26,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 168 states have (on average 1.375) internal successors, (231), 184 states have internal predecessors, (231), 4 states have call successors, (4), 4 states have call predecessors, (4), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-12-14 11:47:26,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 242 transitions. [2022-12-14 11:47:26,797 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 242 transitions. Word has length 34 [2022-12-14 11:47:26,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:47:26,797 INFO L495 AbstractCegarLoop]: Abstraction has 193 states and 242 transitions. [2022-12-14 11:47:26,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 4.133333333333334) internal successors, (62), 15 states have internal predecessors, (62), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 11:47:26,798 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 242 transitions. [2022-12-14 11:47:26,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-12-14 11:47:26,798 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:47:26,798 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:47:26,804 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-14 11:47:26,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:47:26,999 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-14 11:47:26,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:47:26,999 INFO L85 PathProgramCache]: Analyzing trace with hash -1959200108, now seen corresponding path program 1 times [2022-12-14 11:47:26,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:47:26,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911402561] [2022-12-14 11:47:26,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:47:27,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:47:27,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:47:27,281 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:47:27,281 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:47:27,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911402561] [2022-12-14 11:47:27,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911402561] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:47:27,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195745765] [2022-12-14 11:47:27,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:47:27,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:47:27,282 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:47:27,283 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:47:27,283 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-14 11:47:27,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:47:27,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 27 conjunts are in the unsatisfiable core [2022-12-14 11:47:27,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:47:27,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:47:27,491 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-12-14 11:47:27,600 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 11:47:27,603 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 11:47:27,617 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:47:27,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:47:27,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1195745765] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:47:27,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2073977984] [2022-12-14 11:47:27,768 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2022-12-14 11:47:27,768 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:47:27,768 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:47:27,768 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:47:27,768 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:47:27,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:47:27,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:47:27,901 INFO L321 Elim1Store]: treesize reduction 148, result has 13.5 percent of original size [2022-12-14 11:47:27,901 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 183 treesize of output 182 [2022-12-14 11:47:27,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:47:27,946 INFO L321 Elim1Store]: treesize reduction 174, result has 23.0 percent of original size [2022-12-14 11:47:27,946 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 12 case distinctions, treesize of input 183 treesize of output 206 [2022-12-14 11:47:28,311 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 41 for LOIs [2022-12-14 11:47:28,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:47:28,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:47:28,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:47:28,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:47:28,557 INFO L321 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-12-14 11:47:28,557 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 35 [2022-12-14 11:47:28,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:47:28,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:47:28,588 INFO L321 Elim1Store]: treesize reduction 52, result has 26.8 percent of original size [2022-12-14 11:47:28,588 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 27 treesize of output 41 [2022-12-14 11:47:28,794 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:47:31,944 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9072#(and (<= |parse_input_~input#1.offset| 0) (= 6 |~#commands~0.base|) (<= 0 ~global~0.offset) (<= 3 |parse_input_~input#1.base|) (<= 0 |parse_input_~input#1.offset|) (<= 0 |parse_input_#in~input#1.offset|) (<= 0 |~#commands~0.offset|) (= (select |#valid| |parse_input_#t~mem3#1.base|) 1) (<= |parse_input_#in~input#1.offset| 0) (<= ~global~0.offset 0) (<= |parse_input_#in~input#1.base| 4) (= |#NULL.offset| 0) (<= |parse_input_~input#1.base| 4) (or (not (< |parse_input_#t~mem3#1.offset| (select |#length| |parse_input_#t~mem3#1.base|))) (not (<= 0 |parse_input_#t~mem3#1.offset|))) (<= 3 |parse_input_#in~input#1.base|) (= |old(~global~0.offset)| 0) (<= 0 |#StackHeapBarrier|) (<= 0 |parse_input_~i~0#1|) (<= |~#commands~0.offset| 0) (= |#NULL.base| 0))' at error location [2022-12-14 11:47:31,944 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 11:47:31,944 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 11:47:31,944 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 16 [2022-12-14 11:47:31,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97451808] [2022-12-14 11:47:31,944 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 11:47:31,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-14 11:47:31,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:47:31,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-14 11:47:31,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1473, Unknown=0, NotChecked=0, Total=1640 [2022-12-14 11:47:31,945 INFO L87 Difference]: Start difference. First operand 193 states and 242 transitions. Second operand has 18 states, 15 states have (on average 4.266666666666667) internal successors, (64), 15 states have internal predecessors, (64), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 11:47:32,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:47:32,816 INFO L93 Difference]: Finished difference Result 290 states and 337 transitions. [2022-12-14 11:47:32,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-12-14 11:47:32,816 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 15 states have (on average 4.266666666666667) internal successors, (64), 15 states have internal predecessors, (64), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 35 [2022-12-14 11:47:32,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:47:32,817 INFO L225 Difference]: With dead ends: 290 [2022-12-14 11:47:32,817 INFO L226 Difference]: Without dead ends: 290 [2022-12-14 11:47:32,818 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 51 SyntacticMatches, 4 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 968 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=419, Invalid=2887, Unknown=0, NotChecked=0, Total=3306 [2022-12-14 11:47:32,819 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 525 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 513 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 525 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 11:47:32,819 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [525 Valid, 395 Invalid, 581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 513 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 11:47:32,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2022-12-14 11:47:32,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 194. [2022-12-14 11:47:32,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 170 states have (on average 1.3529411764705883) internal successors, (230), 185 states have internal predecessors, (230), 4 states have call successors, (4), 4 states have call predecessors, (4), 6 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-12-14 11:47:32,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 241 transitions. [2022-12-14 11:47:32,824 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 241 transitions. Word has length 35 [2022-12-14 11:47:32,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:47:32,825 INFO L495 AbstractCegarLoop]: Abstraction has 194 states and 241 transitions. [2022-12-14 11:47:32,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 15 states have (on average 4.266666666666667) internal successors, (64), 15 states have internal predecessors, (64), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 11:47:32,825 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 241 transitions. [2022-12-14 11:47:32,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-12-14 11:47:32,825 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:47:32,825 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:47:32,830 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-14 11:47:33,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-14 11:47:33,027 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting parse_inputErr16ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-14 11:47:33,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:47:33,028 INFO L85 PathProgramCache]: Analyzing trace with hash -724690043, now seen corresponding path program 1 times [2022-12-14 11:47:33,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:47:33,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305739005] [2022-12-14 11:47:33,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:47:33,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:47:33,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:47:33,109 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:47:33,109 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:47:33,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305739005] [2022-12-14 11:47:33,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305739005] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:47:33,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157432801] [2022-12-14 11:47:33,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:47:33,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:47:33,110 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:47:33,111 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:47:33,111 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-14 11:47:33,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:47:33,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 11:47:33,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:47:33,194 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:47:33,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:47:33,225 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:47:33,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [157432801] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:47:33,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1959639402] [2022-12-14 11:47:33,226 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2022-12-14 11:47:33,227 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:47:33,227 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:47:33,227 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:47:33,227 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:47:33,305 INFO L321 Elim1Store]: treesize reduction 118, result has 27.2 percent of original size [2022-12-14 11:47:33,305 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 35 treesize of output 61 [2022-12-14 11:47:33,318 INFO L321 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2022-12-14 11:47:33,319 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 51 [2022-12-14 11:47:33,595 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 41 for LOIs [2022-12-14 11:47:33,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:47:33,714 INFO L321 Elim1Store]: treesize reduction 46, result has 62.3 percent of original size [2022-12-14 11:47:33,714 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 43 treesize of output 103 [2022-12-14 11:47:33,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:47:33,817 INFO L321 Elim1Store]: treesize reduction 110, result has 28.6 percent of original size [2022-12-14 11:47:33,817 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 35 treesize of output 61 [2022-12-14 11:47:33,930 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:47:37,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1959639402] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:47:37,447 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 11:47:37,447 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [3, 3, 3] total 21 [2022-12-14 11:47:37,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600452441] [2022-12-14 11:47:37,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:47:37,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-14 11:47:37,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:47:37,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-14 11:47:37,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2022-12-14 11:47:37,448 INFO L87 Difference]: Start difference. First operand 194 states and 241 transitions. Second operand has 20 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 11:47:37,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:47:37,890 INFO L93 Difference]: Finished difference Result 273 states and 331 transitions. [2022-12-14 11:47:37,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-14 11:47:37,891 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2022-12-14 11:47:37,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:47:37,892 INFO L225 Difference]: With dead ends: 273 [2022-12-14 11:47:37,892 INFO L226 Difference]: Without dead ends: 273 [2022-12-14 11:47:37,892 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 90 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2022-12-14 11:47:37,893 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 66 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 11:47:37,893 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 127 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 11:47:37,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2022-12-14 11:47:37,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 250. [2022-12-14 11:47:37,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 222 states have (on average 1.3333333333333333) internal successors, (296), 239 states have internal predecessors, (296), 5 states have call successors, (5), 5 states have call predecessors, (5), 9 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2022-12-14 11:47:37,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 313 transitions. [2022-12-14 11:47:37,896 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 313 transitions. Word has length 37 [2022-12-14 11:47:37,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:47:37,896 INFO L495 AbstractCegarLoop]: Abstraction has 250 states and 313 transitions. [2022-12-14 11:47:37,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 11:47:37,897 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 313 transitions. [2022-12-14 11:47:37,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-12-14 11:47:37,897 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:47:37,897 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:47:37,902 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-14 11:47:38,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-14 11:47:38,098 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting parse_inputErr16ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-14 11:47:38,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:47:38,098 INFO L85 PathProgramCache]: Analyzing trace with hash 1556026682, now seen corresponding path program 1 times [2022-12-14 11:47:38,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:47:38,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859772735] [2022-12-14 11:47:38,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:47:38,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:47:38,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:47:38,159 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 11:47:38,159 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:47:38,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859772735] [2022-12-14 11:47:38,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859772735] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:47:38,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850830494] [2022-12-14 11:47:38,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:47:38,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:47:38,159 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:47:38,160 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:47:38,161 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-14 11:47:38,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:47:38,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 11:47:38,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:47:38,260 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 11:47:38,261 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:47:38,317 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 11:47:38,317 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [850830494] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-14 11:47:38,317 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-14 11:47:38,317 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3, 2] total 6 [2022-12-14 11:47:38,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353306535] [2022-12-14 11:47:38,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:47:38,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 11:47:38,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:47:38,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 11:47:38,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-12-14 11:47:38,318 INFO L87 Difference]: Start difference. First operand 250 states and 313 transitions. Second operand has 4 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 11:47:38,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:47:38,341 INFO L93 Difference]: Finished difference Result 393 states and 494 transitions. [2022-12-14 11:47:38,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 11:47:38,342 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2022-12-14 11:47:38,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:47:38,343 INFO L225 Difference]: With dead ends: 393 [2022-12-14 11:47:38,343 INFO L226 Difference]: Without dead ends: 393 [2022-12-14 11:47:38,343 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-12-14 11:47:38,343 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 62 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 11:47:38,343 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 122 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 11:47:38,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2022-12-14 11:47:38,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 377. [2022-12-14 11:47:38,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 338 states have (on average 1.331360946745562) internal successors, (450), 360 states have internal predecessors, (450), 8 states have call successors, (8), 8 states have call predecessors, (8), 17 states have return successors, (27), 8 states have call predecessors, (27), 8 states have call successors, (27) [2022-12-14 11:47:38,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 485 transitions. [2022-12-14 11:47:38,349 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 485 transitions. Word has length 38 [2022-12-14 11:47:38,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:47:38,350 INFO L495 AbstractCegarLoop]: Abstraction has 377 states and 485 transitions. [2022-12-14 11:47:38,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 11:47:38,350 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 485 transitions. [2022-12-14 11:47:38,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-12-14 11:47:38,350 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:47:38,350 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:47:38,356 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-14 11:47:38,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:47:38,551 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting parse_inputErr17ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-14 11:47:38,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:47:38,551 INFO L85 PathProgramCache]: Analyzing trace with hash -990554755, now seen corresponding path program 1 times [2022-12-14 11:47:38,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:47:38,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785773031] [2022-12-14 11:47:38,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:47:38,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:47:38,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:47:38,614 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:47:38,614 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:47:38,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785773031] [2022-12-14 11:47:38,614 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785773031] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:47:38,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331327637] [2022-12-14 11:47:38,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:47:38,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:47:38,615 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:47:38,616 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:47:38,616 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-14 11:47:38,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:47:38,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 11:47:38,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:47:38,707 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:47:38,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:47:38,743 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:47:38,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331327637] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:47:38,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1901680787] [2022-12-14 11:47:38,745 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2022-12-14 11:47:38,745 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:47:38,745 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:47:38,745 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:47:38,746 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:47:38,824 INFO L321 Elim1Store]: treesize reduction 118, result has 27.2 percent of original size [2022-12-14 11:47:38,824 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 35 treesize of output 61 [2022-12-14 11:47:38,841 INFO L321 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2022-12-14 11:47:38,841 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 51 [2022-12-14 11:47:39,084 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 41 for LOIs [2022-12-14 11:47:39,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:47:39,192 INFO L321 Elim1Store]: treesize reduction 110, result has 28.6 percent of original size [2022-12-14 11:47:39,192 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 35 treesize of output 61 [2022-12-14 11:47:39,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:47:39,213 INFO L321 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-12-14 11:47:39,213 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 51 [2022-12-14 11:47:39,309 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:47:42,393 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11594#(and (= |parse_input_c1_~x~0#1.offset| 0) (not (= ~global~0.base 0)) (= (select |#valid| |parse_input_~input#1.base|) 1) (not (< ~global~0.base |#StackHeapBarrier|)) (= 6 |~#commands~0.base|) (= |parse_input_#t~mem6#1.base| (select (select |#memory_$Pointer$.base| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset| 4))) (not (= |parse_input_c1_~x~0#1.base| 0)) (= |parse_input_##fun~~TO~VOID_#in~#fp#1.base| |parse_input_#t~mem6#1.base|) (< |parse_input_~input#1.offset| (select |#length| |parse_input_~input#1.base|)) (= |parse_input_#in~input#1.base| |parse_input_~input#1.base|) (= (select |#valid| |parse_input_c1_~x~0#1.base|) 1) (= (select |#length| |parse_input_c1_~x~0#1.base|) 1) (<= 0 |parse_input_#in~input#1.offset|) (= |parse_input_#in~input#1.offset| |parse_input_~input#1.offset|) (= ~global~0.offset 0) (<= 0 (select (select |#memory_$Pointer$.offset| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset|))) (<= 0 |~#commands~0.offset|) (= |parse_input_#t~mem6#1.offset| |parse_input_##fun~~TO~VOID_#in~#fp#1.offset|) (<= (select (select |#memory_int| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset| 8)) ~state~0) (= |parse_input_~i~0#1| 0) (<= |parse_input_#in~input#1.offset| 0) (= |parse_input_#t~mem6#1.offset| (select (select |#memory_$Pointer$.offset| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset| 4))) (<= |parse_input_#in~input#1.base| 4) (not (= |parse_input_c1_~x~0#1.base| |parse_input_~input#1.base|)) (not (= |parse_input_c1_~x~0#1.base| (select (select |#memory_$Pointer$.base| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset|)))) (= |#NULL.offset| 0) (< (select (select |#memory_$Pointer$.offset| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset|)) (select |#length| (select (select |#memory_$Pointer$.base| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset|)))) (< |parse_input_c1_~x~0#1.base| |#StackHeapBarrier|) (<= 3 |parse_input_#in~input#1.base|) (= |old(~global~0.offset)| 0) (= (select |#valid| (select (select |#memory_$Pointer$.base| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset|))) 1) (<= 0 |#StackHeapBarrier|) (<= (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset| 9) (select |#length| |~#commands~0.base|)) (or (not (= |parse_input_##fun~~TO~VOID_#in~#fp#1.offset| |#funAddr~c2.offset|)) (not (= |parse_input_##fun~~TO~VOID_#in~#fp#1.base| |#funAddr~c2.base|))) (<= |~#commands~0.offset| 0) (= (select |#valid| |~#commands~0.base|) 1) (= |#NULL.base| 0))' at error location [2022-12-14 11:47:42,393 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 11:47:42,394 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 11:47:42,394 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 3 [2022-12-14 11:47:42,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633096433] [2022-12-14 11:47:42,394 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 11:47:42,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 11:47:42,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:47:42,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 11:47:42,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=388, Unknown=0, NotChecked=0, Total=506 [2022-12-14 11:47:42,395 INFO L87 Difference]: Start difference. First operand 377 states and 485 transitions. Second operand has 4 states, 3 states have (on average 11.666666666666666) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 11:47:42,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:47:42,429 INFO L93 Difference]: Finished difference Result 378 states and 482 transitions. [2022-12-14 11:47:42,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 11:47:42,430 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 11.666666666666666) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2022-12-14 11:47:42,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:47:42,430 INFO L225 Difference]: With dead ends: 378 [2022-12-14 11:47:42,431 INFO L226 Difference]: Without dead ends: 378 [2022-12-14 11:47:42,431 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 90 SyntacticMatches, 5 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=124, Invalid=428, Unknown=0, NotChecked=0, Total=552 [2022-12-14 11:47:42,431 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 44 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 11:47:42,431 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 67 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 11:47:42,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2022-12-14 11:47:42,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 375. [2022-12-14 11:47:42,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 375 states, 338 states have (on average 1.3136094674556213) internal successors, (444), 358 states have internal predecessors, (444), 8 states have call successors, (8), 8 states have call predecessors, (8), 17 states have return successors, (27), 8 states have call predecessors, (27), 8 states have call successors, (27) [2022-12-14 11:47:42,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 479 transitions. [2022-12-14 11:47:42,436 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 479 transitions. Word has length 38 [2022-12-14 11:47:42,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:47:42,437 INFO L495 AbstractCegarLoop]: Abstraction has 375 states and 479 transitions. [2022-12-14 11:47:42,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 11.666666666666666) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 11:47:42,437 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 479 transitions. [2022-12-14 11:47:42,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-12-14 11:47:42,437 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:47:42,437 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:47:42,441 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-12-14 11:47:42,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:47:42,639 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting parse_inputErr18ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-14 11:47:42,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:47:42,639 INFO L85 PathProgramCache]: Analyzing trace with hash -642426233, now seen corresponding path program 1 times [2022-12-14 11:47:42,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:47:42,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480805211] [2022-12-14 11:47:42,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:47:42,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:47:42,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:47:42,752 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:47:42,752 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:47:42,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480805211] [2022-12-14 11:47:42,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480805211] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:47:42,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121699715] [2022-12-14 11:47:42,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:47:42,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:47:42,752 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:47:42,753 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:47:42,754 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-14 11:47:42,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:47:42,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-14 11:47:42,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:47:42,814 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 11:47:42,842 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 11:47:42,842 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-12-14 11:47:42,847 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:47:42,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:47:42,947 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:47:42,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121699715] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:47:42,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [206000244] [2022-12-14 11:47:42,949 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2022-12-14 11:47:42,949 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:47:42,949 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:47:42,949 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:47:42,949 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:47:43,010 INFO L321 Elim1Store]: treesize reduction 118, result has 27.2 percent of original size [2022-12-14 11:47:43,011 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 35 treesize of output 61 [2022-12-14 11:47:43,025 INFO L321 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2022-12-14 11:47:43,025 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 51 [2022-12-14 11:47:43,270 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 41 for LOIs [2022-12-14 11:47:43,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:47:43,386 INFO L321 Elim1Store]: treesize reduction 110, result has 28.6 percent of original size [2022-12-14 11:47:43,387 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 35 treesize of output 61 [2022-12-14 11:47:43,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:47:43,405 INFO L321 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-12-14 11:47:43,405 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 51 [2022-12-14 11:47:43,503 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:47:46,831 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '12602#(and (= |parse_input_c1_~x~0#1.offset| 0) (not (= ~global~0.base 0)) (= (select |#valid| |parse_input_~input#1.base|) 1) (not (= (select |#valid| ~global~0.base) 1)) (= 6 |~#commands~0.base|) (= |parse_input_#t~mem6#1.base| (select (select |#memory_$Pointer$.base| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset| 4))) (not (= |parse_input_c1_~x~0#1.base| 0)) (= |parse_input_##fun~~TO~VOID_#in~#fp#1.base| |parse_input_#t~mem6#1.base|) (< |parse_input_~input#1.offset| (select |#length| |parse_input_~input#1.base|)) (= |parse_input_#in~input#1.base| |parse_input_~input#1.base|) (= (select |#valid| |parse_input_c1_~x~0#1.base|) 1) (= (select |#length| |parse_input_c1_~x~0#1.base|) 1) (<= 0 |parse_input_#in~input#1.offset|) (= |parse_input_#in~input#1.offset| |parse_input_~input#1.offset|) (< ~global~0.base |#StackHeapBarrier|) (= ~global~0.offset 0) (<= 0 (select (select |#memory_$Pointer$.offset| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset|))) (<= 0 |~#commands~0.offset|) (= |parse_input_#t~mem6#1.offset| |parse_input_##fun~~TO~VOID_#in~#fp#1.offset|) (<= (select (select |#memory_int| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset| 8)) ~state~0) (= |parse_input_~i~0#1| 0) (<= |parse_input_#in~input#1.offset| 0) (= |parse_input_#t~mem6#1.offset| (select (select |#memory_$Pointer$.offset| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset| 4))) (<= |parse_input_#in~input#1.base| 4) (not (= |parse_input_c1_~x~0#1.base| |parse_input_~input#1.base|)) (not (= |parse_input_c1_~x~0#1.base| (select (select |#memory_$Pointer$.base| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset|)))) (= |#NULL.offset| 0) (< (select (select |#memory_$Pointer$.offset| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset|)) (select |#length| (select (select |#memory_$Pointer$.base| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset|)))) (< |parse_input_c1_~x~0#1.base| |#StackHeapBarrier|) (<= 3 |parse_input_#in~input#1.base|) (= |old(~global~0.offset)| 0) (= (select |#valid| (select (select |#memory_$Pointer$.base| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset|))) 1) (<= 0 |#StackHeapBarrier|) (<= (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset| 9) (select |#length| |~#commands~0.base|)) (or (not (= |parse_input_##fun~~TO~VOID_#in~#fp#1.offset| |#funAddr~c2.offset|)) (not (= |parse_input_##fun~~TO~VOID_#in~#fp#1.base| |#funAddr~c2.base|))) (<= |~#commands~0.offset| 0) (= (select |#valid| |~#commands~0.base|) 1) (= |#NULL.base| 0))' at error location [2022-12-14 11:47:46,832 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 11:47:46,832 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 11:47:46,832 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 4] total 5 [2022-12-14 11:47:46,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979539089] [2022-12-14 11:47:46,832 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 11:47:46,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 11:47:46,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:47:46,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 11:47:46,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=506, Unknown=0, NotChecked=0, Total=650 [2022-12-14 11:47:46,833 INFO L87 Difference]: Start difference. First operand 375 states and 479 transitions. Second operand has 6 states, 5 states have (on average 11.0) internal successors, (55), 6 states have internal predecessors, (55), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-14 11:47:46,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:47:46,906 INFO L93 Difference]: Finished difference Result 409 states and 512 transitions. [2022-12-14 11:47:46,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 11:47:46,907 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 11.0) internal successors, (55), 6 states have internal predecessors, (55), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 39 [2022-12-14 11:47:46,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:47:46,908 INFO L225 Difference]: With dead ends: 409 [2022-12-14 11:47:46,908 INFO L226 Difference]: Without dead ends: 409 [2022-12-14 11:47:46,908 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 95 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=152, Invalid=550, Unknown=0, NotChecked=0, Total=702 [2022-12-14 11:47:46,909 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 54 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 11:47:46,909 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 166 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 11:47:46,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2022-12-14 11:47:46,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 382. [2022-12-14 11:47:46,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 345 states have (on average 1.3101449275362318) internal successors, (452), 365 states have internal predecessors, (452), 8 states have call successors, (8), 8 states have call predecessors, (8), 17 states have return successors, (27), 8 states have call predecessors, (27), 8 states have call successors, (27) [2022-12-14 11:47:46,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 487 transitions. [2022-12-14 11:47:46,914 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 487 transitions. Word has length 39 [2022-12-14 11:47:46,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:47:46,914 INFO L495 AbstractCegarLoop]: Abstraction has 382 states and 487 transitions. [2022-12-14 11:47:46,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 11.0) internal successors, (55), 6 states have internal predecessors, (55), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-14 11:47:46,914 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 487 transitions. [2022-12-14 11:47:46,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-12-14 11:47:46,915 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:47:46,915 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:47:46,919 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-12-14 11:47:47,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-12-14 11:47:47,117 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting parse_inputErr18ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-14 11:47:47,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:47:47,118 INFO L85 PathProgramCache]: Analyzing trace with hash 693025532, now seen corresponding path program 1 times [2022-12-14 11:47:47,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:47:47,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474333753] [2022-12-14 11:47:47,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:47:47,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:47:47,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:47:47,183 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 11:47:47,183 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:47:47,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474333753] [2022-12-14 11:47:47,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474333753] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:47:47,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078087693] [2022-12-14 11:47:47,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:47:47,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:47:47,183 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:47:47,184 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:47:47,185 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-14 11:47:47,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:47:47,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 11:47:47,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:47:47,278 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 11:47:47,278 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:47:47,330 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 11:47:47,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2078087693] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-14 11:47:47,330 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-14 11:47:47,330 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3, 2] total 6 [2022-12-14 11:47:47,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899683946] [2022-12-14 11:47:47,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:47:47,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 11:47:47,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:47:47,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 11:47:47,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-12-14 11:47:47,331 INFO L87 Difference]: Start difference. First operand 382 states and 487 transitions. Second operand has 4 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 11:47:47,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:47:47,360 INFO L93 Difference]: Finished difference Result 453 states and 565 transitions. [2022-12-14 11:47:47,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 11:47:47,360 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2022-12-14 11:47:47,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:47:47,361 INFO L225 Difference]: With dead ends: 453 [2022-12-14 11:47:47,361 INFO L226 Difference]: Without dead ends: 453 [2022-12-14 11:47:47,361 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-12-14 11:47:47,362 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 73 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 11:47:47,362 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 112 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 11:47:47,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2022-12-14 11:47:47,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 430. [2022-12-14 11:47:47,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 430 states, 389 states have (on average 1.3110539845758356) internal successors, (510), 411 states have internal predecessors, (510), 9 states have call successors, (9), 9 states have call predecessors, (9), 20 states have return successors, (30), 9 states have call predecessors, (30), 9 states have call successors, (30) [2022-12-14 11:47:47,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 549 transitions. [2022-12-14 11:47:47,367 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 549 transitions. Word has length 40 [2022-12-14 11:47:47,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:47:47,367 INFO L495 AbstractCegarLoop]: Abstraction has 430 states and 549 transitions. [2022-12-14 11:47:47,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 11:47:47,368 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 549 transitions. [2022-12-14 11:47:47,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-12-14 11:47:47,368 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:47:47,368 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:47:47,373 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-12-14 11:47:47,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:47:47,569 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting parse_inputErr10ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-14 11:47:47,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:47:47,569 INFO L85 PathProgramCache]: Analyzing trace with hash -1106991010, now seen corresponding path program 1 times [2022-12-14 11:47:47,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:47:47,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188159085] [2022-12-14 11:47:47,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:47:47,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:47:47,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:47:47,595 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-12-14 11:47:47,595 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:47:47,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188159085] [2022-12-14 11:47:47,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188159085] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:47:47,596 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:47:47,596 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 11:47:47,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722188457] [2022-12-14 11:47:47,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:47:47,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 11:47:47,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:47:47,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 11:47:47,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 11:47:47,597 INFO L87 Difference]: Start difference. First operand 430 states and 549 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 11:47:47,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:47:47,605 INFO L93 Difference]: Finished difference Result 310 states and 372 transitions. [2022-12-14 11:47:47,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 11:47:47,605 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2022-12-14 11:47:47,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:47:47,607 INFO L225 Difference]: With dead ends: 310 [2022-12-14 11:47:47,607 INFO L226 Difference]: Without dead ends: 310 [2022-12-14 11:47:47,607 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 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 11:47:47,607 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 4 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 11:47:47,607 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 86 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 11:47:47,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2022-12-14 11:47:47,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 292. [2022-12-14 11:47:47,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 266 states have (on average 1.2406015037593985) internal successors, (330), 277 states have internal predecessors, (330), 7 states have call successors, (7), 7 states have call predecessors, (7), 12 states have return successors, (17), 7 states have call predecessors, (17), 7 states have call successors, (17) [2022-12-14 11:47:47,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 354 transitions. [2022-12-14 11:47:47,614 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 354 transitions. Word has length 44 [2022-12-14 11:47:47,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:47:47,614 INFO L495 AbstractCegarLoop]: Abstraction has 292 states and 354 transitions. [2022-12-14 11:47:47,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 11:47:47,614 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 354 transitions. [2022-12-14 11:47:47,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-12-14 11:47:47,615 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:47:47,615 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:47:47,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-12-14 11:47:47,615 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting parse_inputErr16ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-14 11:47:47,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:47:47,615 INFO L85 PathProgramCache]: Analyzing trace with hash -1705702260, now seen corresponding path program 1 times [2022-12-14 11:47:47,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:47:47,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944092382] [2022-12-14 11:47:47,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:47:47,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:47:47,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:47:47,660 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 19 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-14 11:47:47,660 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:47:47,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944092382] [2022-12-14 11:47:47,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944092382] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:47:47,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453987513] [2022-12-14 11:47:47,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:47:47,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:47:47,660 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:47:47,661 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:47:47,662 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-14 11:47:47,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:47:47,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-14 11:47:47,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:47:47,884 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 19 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 11:47:47,885 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:47:48,129 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 21 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:47:48,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453987513] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:47:48,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1536489997] [2022-12-14 11:47:48,130 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2022-12-14 11:47:48,130 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:47:48,131 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:47:48,131 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:47:48,131 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:47:48,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:47:48,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:47:48,258 INFO L321 Elim1Store]: treesize reduction 148, result has 13.5 percent of original size [2022-12-14 11:47:48,258 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 183 treesize of output 182 [2022-12-14 11:47:48,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:47:48,302 INFO L321 Elim1Store]: treesize reduction 174, result has 23.0 percent of original size [2022-12-14 11:47:48,302 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 12 case distinctions, treesize of input 183 treesize of output 206 [2022-12-14 11:47:48,588 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 41 for LOIs [2022-12-14 11:47:48,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:47:48,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:47:48,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:47:48,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:47:48,733 INFO L321 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-12-14 11:47:48,734 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 35 [2022-12-14 11:47:48,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:47:48,771 INFO L321 Elim1Store]: treesize reduction 70, result has 28.6 percent of original size [2022-12-14 11:47:48,771 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 27 treesize of output 45 [2022-12-14 11:47:48,940 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:47:51,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1536489997] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:47:51,187 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 11:47:51,187 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [3, 5, 7] total 31 [2022-12-14 11:47:51,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365220460] [2022-12-14 11:47:51,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:47:51,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-14 11:47:51,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:47:51,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-14 11:47:51,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=777, Unknown=0, NotChecked=0, Total=930 [2022-12-14 11:47:51,188 INFO L87 Difference]: Start difference. First operand 292 states and 354 transitions. Second operand has 20 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 17 states have internal predecessors, (23), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 11:47:52,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:47:52,700 INFO L93 Difference]: Finished difference Result 312 states and 373 transitions. [2022-12-14 11:47:52,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-12-14 11:47:52,701 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 17 states have internal predecessors, (23), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2022-12-14 11:47:52,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:47:52,702 INFO L225 Difference]: With dead ends: 312 [2022-12-14 11:47:52,703 INFO L226 Difference]: Without dead ends: 312 [2022-12-14 11:47:52,704 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 105 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 490 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=315, Invalid=1665, Unknown=0, NotChecked=0, Total=1980 [2022-12-14 11:47:52,704 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 56 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 369 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 369 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 11:47:52,704 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 140 Invalid, 373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 369 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 11:47:52,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2022-12-14 11:47:52,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 250. [2022-12-14 11:47:52,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 227 states have (on average 1.2466960352422907) internal successors, (283), 237 states have internal predecessors, (283), 6 states have call successors, (6), 6 states have call predecessors, (6), 10 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2022-12-14 11:47:52,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 301 transitions. [2022-12-14 11:47:52,708 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 301 transitions. Word has length 45 [2022-12-14 11:47:52,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:47:52,708 INFO L495 AbstractCegarLoop]: Abstraction has 250 states and 301 transitions. [2022-12-14 11:47:52,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 17 states have internal predecessors, (23), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 11:47:52,708 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 301 transitions. [2022-12-14 11:47:52,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-12-14 11:47:52,708 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:47:52,709 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:47:52,713 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-12-14 11:47:52,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:47:52,910 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-14 11:47:52,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:47:52,911 INFO L85 PathProgramCache]: Analyzing trace with hash 2087117614, now seen corresponding path program 1 times [2022-12-14 11:47:52,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:47:52,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044686331] [2022-12-14 11:47:52,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:47:52,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:47:52,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:47:53,103 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:47:53,103 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:47:53,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044686331] [2022-12-14 11:47:53,104 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044686331] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:47:53,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931506884] [2022-12-14 11:47:53,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:47:53,104 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:47:53,104 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:47:53,105 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:47:53,106 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-12-14 11:47:53,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:47:53,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-14 11:47:53,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:47:53,249 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-14 11:47:53,249 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-12-14 11:47:53,309 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 11:47:53,310 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-12-14 11:47:53,329 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 11:47:53,329 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-12-14 11:47:53,364 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:47:53,364 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:47:53,388 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-12-14 11:47:53,388 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 110 treesize of output 105 [2022-12-14 11:47:53,532 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-12-14 11:47:53,533 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 110 treesize of output 105 [2022-12-14 11:47:53,657 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:47:53,657 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1931506884] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:47:53,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [242943601] [2022-12-14 11:47:53,658 INFO L159 IcfgInterpreter]: Started Sifa with 27 locations of interest [2022-12-14 11:47:53,658 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:47:53,658 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:47:53,659 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:47:53,659 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:47:53,741 INFO L321 Elim1Store]: treesize reduction 46, result has 64.6 percent of original size [2022-12-14 11:47:53,741 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 111 [2022-12-14 11:47:53,891 INFO L321 Elim1Store]: treesize reduction 118, result has 27.2 percent of original size [2022-12-14 11:47:53,891 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 35 treesize of output 61 [2022-12-14 11:47:54,009 INFO L321 Elim1Store]: treesize reduction 136, result has 28.0 percent of original size [2022-12-14 11:47:54,009 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 40 treesize of output 73 [2022-12-14 11:47:54,021 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2022-12-14 11:47:54,082 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2022-12-14 11:47:54,337 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 25 for LOIs [2022-12-14 11:47:54,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:47:54,414 INFO L321 Elim1Store]: treesize reduction 46, result has 62.3 percent of original size [2022-12-14 11:47:54,414 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 43 treesize of output 103 [2022-12-14 11:47:54,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:47:54,510 INFO L321 Elim1Store]: treesize reduction 110, result has 28.6 percent of original size [2022-12-14 11:47:54,511 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 35 treesize of output 61 [2022-12-14 11:47:54,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:47:54,621 INFO L321 Elim1Store]: treesize reduction 128, result has 29.3 percent of original size [2022-12-14 11:47:54,621 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 40 treesize of output 73 [2022-12-14 11:47:54,642 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2022-12-14 11:47:54,688 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2022-12-14 11:47:54,721 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2022-12-14 11:47:54,769 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:47:57,351 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '16337#(and (= 6 |~#commands~0.base|) (<= 0 ~global~0.offset) (not (= (select |#valid| |~#commands~0.base|) 1)) (= |parse_input_#in~input#1.base| |parse_input_~input#1.base|) (= |parse_input_#in~input#1.offset| |parse_input_~input#1.offset|) (= |~#commands~0.offset| 0) (= |parse_input_~i~0#1| 0) (<= ~global~0.offset 0) (= |#NULL.offset| 0) (= |parse_input_#in~input#1.offset| 0) (<= 3 |parse_input_#in~input#1.base|) (= |old(~global~0.offset)| 0) (<= 0 |#StackHeapBarrier|) (<= |parse_input_#in~input#1.base| 5) (= |#NULL.base| 0))' at error location [2022-12-14 11:47:57,351 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 11:47:57,351 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 11:47:57,352 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 10] total 25 [2022-12-14 11:47:57,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331398658] [2022-12-14 11:47:57,352 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 11:47:57,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-12-14 11:47:57,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:47:57,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-12-14 11:47:57,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=1674, Unknown=0, NotChecked=0, Total=1980 [2022-12-14 11:47:57,353 INFO L87 Difference]: Start difference. First operand 250 states and 301 transitions. Second operand has 26 states, 23 states have (on average 5.478260869565218) internal successors, (126), 25 states have internal predecessors, (126), 6 states have call successors, (8), 8 states have call predecessors, (8), 6 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2022-12-14 11:47:57,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:47:57,516 INFO L93 Difference]: Finished difference Result 255 states and 306 transitions. [2022-12-14 11:47:57,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 11:47:57,516 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 23 states have (on average 5.478260869565218) internal successors, (126), 25 states have internal predecessors, (126), 6 states have call successors, (8), 8 states have call predecessors, (8), 6 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) Word has length 48 [2022-12-14 11:47:57,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:47:57,517 INFO L225 Difference]: With dead ends: 255 [2022-12-14 11:47:57,517 INFO L226 Difference]: Without dead ends: 255 [2022-12-14 11:47:57,517 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 108 SyntacticMatches, 4 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 762 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=392, Invalid=1960, Unknown=0, NotChecked=0, Total=2352 [2022-12-14 11:47:57,518 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 139 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 11:47:57,518 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 114 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 11:47:57,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2022-12-14 11:47:57,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 249. [2022-12-14 11:47:57,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 227 states have (on average 1.2422907488986785) internal successors, (282), 236 states have internal predecessors, (282), 6 states have call successors, (6), 6 states have call predecessors, (6), 10 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2022-12-14 11:47:57,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 300 transitions. [2022-12-14 11:47:57,521 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 300 transitions. Word has length 48 [2022-12-14 11:47:57,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:47:57,521 INFO L495 AbstractCegarLoop]: Abstraction has 249 states and 300 transitions. [2022-12-14 11:47:57,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 23 states have (on average 5.478260869565218) internal successors, (126), 25 states have internal predecessors, (126), 6 states have call successors, (8), 8 states have call predecessors, (8), 6 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2022-12-14 11:47:57,521 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 300 transitions. [2022-12-14 11:47:57,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-12-14 11:47:57,522 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:47:57,522 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:47:57,526 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-12-14 11:47:57,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-12-14 11:47:57,723 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-14 11:47:57,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:47:57,724 INFO L85 PathProgramCache]: Analyzing trace with hash 187710493, now seen corresponding path program 1 times [2022-12-14 11:47:57,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:47:57,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236918796] [2022-12-14 11:47:57,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:47:57,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:47:57,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:47:57,783 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 24 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:47:57,783 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:47:57,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236918796] [2022-12-14 11:47:57,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236918796] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:47:57,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929823660] [2022-12-14 11:47:57,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:47:57,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:47:57,784 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:47:57,785 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:47:57,785 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-12-14 11:47:57,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:47:57,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 11:47:57,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:47:57,871 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 24 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:47:57,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:47:57,924 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 24 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:47:57,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1929823660] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:47:57,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1448528271] [2022-12-14 11:47:57,925 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2022-12-14 11:47:57,925 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:47:57,925 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:47:57,925 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:47:57,925 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:47:57,995 INFO L321 Elim1Store]: treesize reduction 118, result has 27.2 percent of original size [2022-12-14 11:47:57,996 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 35 treesize of output 61 [2022-12-14 11:47:58,009 INFO L321 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2022-12-14 11:47:58,010 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 51 [2022-12-14 11:47:58,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:47:58,282 INFO L321 Elim1Store]: treesize reduction 52, result has 1.9 percent of original size [2022-12-14 11:47:58,283 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 723 treesize of output 699 [2022-12-14 11:47:58,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:47:58,299 INFO L321 Elim1Store]: treesize reduction 52, result has 1.9 percent of original size [2022-12-14 11:47:58,299 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 699 treesize of output 675 [2022-12-14 11:47:58,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:47:58,505 INFO L321 Elim1Store]: treesize reduction 52, result has 1.9 percent of original size [2022-12-14 11:47:58,506 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 723 treesize of output 699 [2022-12-14 11:47:58,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:47:58,523 INFO L321 Elim1Store]: treesize reduction 52, result has 1.9 percent of original size [2022-12-14 11:47:58,523 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 699 treesize of output 675 [2022-12-14 11:47:58,739 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 42 for LOIs [2022-12-14 11:47:58,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:47:58,846 INFO L321 Elim1Store]: treesize reduction 110, result has 28.6 percent of original size [2022-12-14 11:47:58,846 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 35 treesize of output 61 [2022-12-14 11:47:58,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:47:58,862 INFO L321 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-12-14 11:47:58,862 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 51 [2022-12-14 11:47:58,931 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:48:01,631 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '17159#(and (= 6 |~#commands~0.base|) (not (= (select |#valid| |parse_input_~input#1.base|) 1)) (<= 0 ~global~0.offset) (< |parse_input_#t~mem3#1.offset| (select |#length| |parse_input_#t~mem3#1.base|)) (= (select (select |#memory_$Pointer$.offset| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset|)) |parse_input_#t~mem3#1.offset|) (= |parse_input_#in~input#1.base| |parse_input_~input#1.base|) (<= (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset| 4) (select |#length| |~#commands~0.base|)) (<= 0 |parse_input_#in~input#1.offset|) (= |parse_input_#in~input#1.offset| |parse_input_~input#1.offset|) (<= 0 |parse_input_#t~mem3#1.offset|) (<= 0 |~#commands~0.offset|) (= (select |#valid| |parse_input_#t~mem3#1.base|) 1) (= |parse_input_#t~mem3#1.base| (select (select |#memory_$Pointer$.base| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset|))) (= |parse_input_~i~0#1| 0) (<= |parse_input_#in~input#1.offset| 0) (<= ~global~0.offset 0) (= |#NULL.offset| 0) (<= 3 |parse_input_#in~input#1.base|) (= |old(~global~0.offset)| 0) (<= 0 |#StackHeapBarrier|) (<= |parse_input_#in~input#1.base| 5) (<= |~#commands~0.offset| 0) (= (select |#valid| |~#commands~0.base|) 1) (= |#NULL.base| 0))' at error location [2022-12-14 11:48:01,631 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 11:48:01,631 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 11:48:01,631 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 7 [2022-12-14 11:48:01,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267845599] [2022-12-14 11:48:01,631 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 11:48:01,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 11:48:01,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:48:01,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 11:48:01,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=513, Unknown=0, NotChecked=0, Total=650 [2022-12-14 11:48:01,633 INFO L87 Difference]: Start difference. First operand 249 states and 300 transitions. Second operand has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 7 states have internal predecessors, (57), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 11:48:01,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:48:01,715 INFO L93 Difference]: Finished difference Result 267 states and 312 transitions. [2022-12-14 11:48:01,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-14 11:48:01,715 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 7 states have internal predecessors, (57), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 48 [2022-12-14 11:48:01,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:48:01,716 INFO L225 Difference]: With dead ends: 267 [2022-12-14 11:48:01,716 INFO L226 Difference]: Without dead ends: 267 [2022-12-14 11:48:01,716 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=177, Invalid=815, Unknown=0, NotChecked=0, Total=992 [2022-12-14 11:48:01,716 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 79 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 11:48:01,716 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 189 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 11:48:01,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2022-12-14 11:48:01,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 249. [2022-12-14 11:48:01,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 227 states have (on average 1.2290748898678414) internal successors, (279), 236 states have internal predecessors, (279), 6 states have call successors, (6), 6 states have call predecessors, (6), 10 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2022-12-14 11:48:01,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 297 transitions. [2022-12-14 11:48:01,719 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 297 transitions. Word has length 48 [2022-12-14 11:48:01,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:48:01,720 INFO L495 AbstractCegarLoop]: Abstraction has 249 states and 297 transitions. [2022-12-14 11:48:01,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 7 states have internal predecessors, (57), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 11:48:01,720 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 297 transitions. [2022-12-14 11:48:01,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-12-14 11:48:01,720 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:48:01,720 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:48:01,724 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-12-14 11:48:01,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-12-14 11:48:01,921 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-14 11:48:01,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:48:01,921 INFO L85 PathProgramCache]: Analyzing trace with hash 1739820872, now seen corresponding path program 1 times [2022-12-14 11:48:01,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:48:01,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834274277] [2022-12-14 11:48:01,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:48:01,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:48:01,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:48:02,017 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-12-14 11:48:02,018 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:48:02,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834274277] [2022-12-14 11:48:02,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834274277] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:48:02,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340234664] [2022-12-14 11:48:02,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:48:02,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:48:02,018 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:48:02,019 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:48:02,020 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-12-14 11:48:02,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:48:02,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-14 11:48:02,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:48:02,133 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 11:48:02,134 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-12-14 11:48:02,157 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-12-14 11:48:02,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:48:02,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1340234664] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:48:02,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2045017009] [2022-12-14 11:48:02,201 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2022-12-14 11:48:02,201 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:48:02,201 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:48:02,201 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:48:02,201 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:48:02,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:48:02,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:48:02,382 INFO L321 Elim1Store]: treesize reduction 165, result has 19.9 percent of original size [2022-12-14 11:48:02,382 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 196 treesize of output 210 [2022-12-14 11:48:02,452 INFO L321 Elim1Store]: treesize reduction 205, result has 30.0 percent of original size [2022-12-14 11:48:02,453 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 185 treesize of output 234 [2022-12-14 11:48:02,708 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 35 for LOIs [2022-12-14 11:48:02,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:48:02,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:48:02,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:48:02,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:48:02,942 INFO L321 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-12-14 11:48:02,942 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 35 [2022-12-14 11:48:02,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:48:02,975 INFO L321 Elim1Store]: treesize reduction 70, result has 28.6 percent of original size [2022-12-14 11:48:02,975 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 27 treesize of output 45 [2022-12-14 11:48:03,114 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:48:04,972 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '17887#(and (<= |parse_input_~input#1.offset| 0) (<= 0 |#NULL.base|) (<= 6 |~#commands~0.base|) (not (= (select |#valid| |parse_input_~input#1.base|) 1)) (<= 3 |parse_input_~input#1.base|) (< |parse_input_#t~mem3#1.offset| (select |#length| |parse_input_#t~mem3#1.base|)) (<= |#NULL.offset| 0) (<= 0 |parse_input_~input#1.offset|) (<= |~#commands~0.base| 6) (<= 0 |parse_input_#in~input#1.offset|) (<= 0 |parse_input_#t~mem3#1.offset|) (<= 0 |~#commands~0.offset|) (= (select |#valid| |parse_input_#t~mem3#1.base|) 1) (<= |parse_input_#in~input#1.offset| 0) (<= |#NULL.base| 0) (<= |parse_input_~input#1.base| 5) (<= 3 |parse_input_#in~input#1.base|) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (<= |parse_input_#in~input#1.base| 5) (<= 0 |parse_input_~i~0#1|) (<= |~#commands~0.offset| 0))' at error location [2022-12-14 11:48:04,972 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 11:48:04,972 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 11:48:04,972 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 8 [2022-12-14 11:48:04,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377952901] [2022-12-14 11:48:04,972 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 11:48:04,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-14 11:48:04,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:48:04,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-14 11:48:04,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=687, Unknown=0, NotChecked=0, Total=812 [2022-12-14 11:48:04,973 INFO L87 Difference]: Start difference. First operand 249 states and 297 transitions. Second operand has 10 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 1 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-14 11:48:05,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:48:05,167 INFO L93 Difference]: Finished difference Result 261 states and 303 transitions. [2022-12-14 11:48:05,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 11:48:05,168 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 1 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 49 [2022-12-14 11:48:05,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:48:05,168 INFO L225 Difference]: With dead ends: 261 [2022-12-14 11:48:05,168 INFO L226 Difference]: Without dead ends: 261 [2022-12-14 11:48:05,169 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 78 SyntacticMatches, 9 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=196, Invalid=1136, Unknown=0, NotChecked=0, Total=1332 [2022-12-14 11:48:05,169 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 192 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 11:48:05,169 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [192 Valid, 201 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 11:48:05,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2022-12-14 11:48:05,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 249. [2022-12-14 11:48:05,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 227 states have (on average 1.2202643171806167) internal successors, (277), 236 states have internal predecessors, (277), 6 states have call successors, (6), 6 states have call predecessors, (6), 10 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2022-12-14 11:48:05,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 295 transitions. [2022-12-14 11:48:05,172 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 295 transitions. Word has length 49 [2022-12-14 11:48:05,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:48:05,172 INFO L495 AbstractCegarLoop]: Abstraction has 249 states and 295 transitions. [2022-12-14 11:48:05,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 1 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-14 11:48:05,172 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 295 transitions. [2022-12-14 11:48:05,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-12-14 11:48:05,173 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:48:05,173 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:48:05,178 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-12-14 11:48:05,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-12-14 11:48:05,373 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-14 11:48:05,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:48:05,374 INFO L85 PathProgramCache]: Analyzing trace with hash 276136575, now seen corresponding path program 1 times [2022-12-14 11:48:05,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:48:05,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021032086] [2022-12-14 11:48:05,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:48:05,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:48:05,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:48:05,905 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:48:05,905 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:48:05,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021032086] [2022-12-14 11:48:05,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021032086] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:48:05,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890801460] [2022-12-14 11:48:05,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:48:05,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:48:05,906 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:48:05,906 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:48:05,908 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-12-14 11:48:05,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:48:05,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 33 conjunts are in the unsatisfiable core [2022-12-14 11:48:05,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:48:06,154 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-14 11:48:06,155 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-12-14 11:48:06,312 INFO L321 Elim1Store]: treesize reduction 30, result has 37.5 percent of original size [2022-12-14 11:48:06,312 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-12-14 11:48:06,352 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-12-14 11:48:06,352 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 26 [2022-12-14 11:48:06,475 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 11:48:06,493 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:48:06,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:48:06,574 INFO L321 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2022-12-14 11:48:06,574 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 178 treesize of output 165 [2022-12-14 11:48:06,796 INFO L321 Elim1Store]: treesize reduction 5, result has 84.8 percent of original size [2022-12-14 11:48:06,797 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 84 treesize of output 101 [2022-12-14 11:48:07,078 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 1 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:48:07,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [890801460] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:48:07,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1556602837] [2022-12-14 11:48:07,080 INFO L159 IcfgInterpreter]: Started Sifa with 27 locations of interest [2022-12-14 11:48:07,080 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:48:07,080 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:48:07,080 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:48:07,080 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:48:07,174 INFO L321 Elim1Store]: treesize reduction 46, result has 64.6 percent of original size [2022-12-14 11:48:07,174 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 111 [2022-12-14 11:48:07,346 INFO L321 Elim1Store]: treesize reduction 118, result has 27.2 percent of original size [2022-12-14 11:48:07,347 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 35 treesize of output 61 [2022-12-14 11:48:07,486 INFO L321 Elim1Store]: treesize reduction 136, result has 28.0 percent of original size [2022-12-14 11:48:07,486 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 40 treesize of output 73 [2022-12-14 11:48:07,508 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2022-12-14 11:48:07,563 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2022-12-14 11:48:07,803 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 25 for LOIs [2022-12-14 11:48:07,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:48:07,890 INFO L321 Elim1Store]: treesize reduction 110, result has 28.6 percent of original size [2022-12-14 11:48:07,890 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 35 treesize of output 61 [2022-12-14 11:48:07,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:48:07,907 INFO L321 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-12-14 11:48:07,907 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 51 [2022-12-14 11:48:07,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:48:08,019 INFO L321 Elim1Store]: treesize reduction 128, result has 29.3 percent of original size [2022-12-14 11:48:08,020 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 40 treesize of output 73 [2022-12-14 11:48:08,084 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:48:11,270 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '18761#(and (= 6 |~#commands~0.base|) (<= 0 ~global~0.offset) (= (select (select |#memory_$Pointer$.offset| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset|)) |parse_input_#t~mem3#1.offset|) (= |parse_input_#in~input#1.base| |parse_input_~input#1.base|) (<= (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset| 4) (select |#length| |~#commands~0.base|)) (= |parse_input_#in~input#1.offset| |parse_input_~input#1.offset|) (= |~#commands~0.offset| 0) (= |parse_input_#t~mem3#1.base| (select (select |#memory_$Pointer$.base| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset|))) (= |parse_input_~i~0#1| 0) (<= ~global~0.offset 0) (= |#NULL.offset| 0) (= |parse_input_#in~input#1.offset| 0) (<= 3 |parse_input_#in~input#1.base|) (= |old(~global~0.offset)| 0) (not (= (select |#valid| |parse_input_#t~mem3#1.base|) 1)) (<= 0 |#StackHeapBarrier|) (<= |parse_input_#in~input#1.base| 5) (= (select |#valid| |~#commands~0.base|) 1) (= |#NULL.base| 0))' at error location [2022-12-14 11:48:11,270 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 11:48:11,270 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 11:48:11,270 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 12, 14] total 42 [2022-12-14 11:48:11,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326546316] [2022-12-14 11:48:11,271 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 11:48:11,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-12-14 11:48:11,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:48:11,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-12-14 11:48:11,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=464, Invalid=3318, Unknown=0, NotChecked=0, Total=3782 [2022-12-14 11:48:11,274 INFO L87 Difference]: Start difference. First operand 249 states and 295 transitions. Second operand has 43 states, 37 states have (on average 3.5405405405405403) internal successors, (131), 35 states have internal predecessors, (131), 8 states have call successors, (9), 9 states have call predecessors, (9), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-12-14 11:48:12,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:48:12,115 INFO L93 Difference]: Finished difference Result 310 states and 359 transitions. [2022-12-14 11:48:12,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-14 11:48:12,115 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 37 states have (on average 3.5405405405405403) internal successors, (131), 35 states have internal predecessors, (131), 8 states have call successors, (9), 9 states have call predecessors, (9), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 49 [2022-12-14 11:48:12,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:48:12,116 INFO L225 Difference]: With dead ends: 310 [2022-12-14 11:48:12,116 INFO L226 Difference]: Without dead ends: 310 [2022-12-14 11:48:12,117 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 103 SyntacticMatches, 2 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1798 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=845, Invalid=4705, Unknown=0, NotChecked=0, Total=5550 [2022-12-14 11:48:12,117 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 570 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 441 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 570 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 11:48:12,117 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [570 Valid, 246 Invalid, 588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 441 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 11:48:12,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2022-12-14 11:48:12,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 249. [2022-12-14 11:48:12,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 227 states have (on average 1.2158590308370043) internal successors, (276), 236 states have internal predecessors, (276), 6 states have call successors, (6), 6 states have call predecessors, (6), 10 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2022-12-14 11:48:12,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 294 transitions. [2022-12-14 11:48:12,121 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 294 transitions. Word has length 49 [2022-12-14 11:48:12,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:48:12,121 INFO L495 AbstractCegarLoop]: Abstraction has 249 states and 294 transitions. [2022-12-14 11:48:12,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 37 states have (on average 3.5405405405405403) internal successors, (131), 35 states have internal predecessors, (131), 8 states have call successors, (9), 9 states have call predecessors, (9), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-12-14 11:48:12,121 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 294 transitions. [2022-12-14 11:48:12,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-12-14 11:48:12,121 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:48:12,121 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:48:12,127 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-12-14 11:48:12,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-12-14 11:48:12,322 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting parse_inputErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-14 11:48:12,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:48:12,322 INFO L85 PathProgramCache]: Analyzing trace with hash -1900127767, now seen corresponding path program 1 times [2022-12-14 11:48:12,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:48:12,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441183757] [2022-12-14 11:48:12,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:48:12,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:48:12,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:48:12,489 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-12-14 11:48:12,489 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:48:12,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441183757] [2022-12-14 11:48:12,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441183757] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:48:12,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323714297] [2022-12-14 11:48:12,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:48:12,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:48:12,490 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:48:12,490 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:48:12,491 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-12-14 11:48:12,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:48:12,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-14 11:48:12,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:48:12,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:48:12,671 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-12-14 11:48:12,722 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-12-14 11:48:12,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:48:12,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1323714297] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:48:12,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [463507019] [2022-12-14 11:48:12,809 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2022-12-14 11:48:12,809 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:48:12,809 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:48:12,809 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:48:12,809 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:48:12,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:48:12,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:48:12,972 INFO L321 Elim1Store]: treesize reduction 148, result has 13.5 percent of original size [2022-12-14 11:48:12,972 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 183 treesize of output 182 [2022-12-14 11:48:12,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:48:13,029 INFO L321 Elim1Store]: treesize reduction 174, result has 23.0 percent of original size [2022-12-14 11:48:13,029 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 12 case distinctions, treesize of input 183 treesize of output 206 [2022-12-14 11:48:13,255 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 35 for LOIs [2022-12-14 11:48:13,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:48:13,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:48:13,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:48:13,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:48:13,394 INFO L321 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-12-14 11:48:13,394 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 35 [2022-12-14 11:48:13,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:48:13,426 INFO L321 Elim1Store]: treesize reduction 70, result has 28.6 percent of original size [2022-12-14 11:48:13,426 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 27 treesize of output 45 [2022-12-14 11:48:13,509 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:48:15,184 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '19559#(and (<= |parse_input_~input#1.offset| 0) (<= (select |#length| |parse_input_~input#1.base|) |parse_input_~input#1.offset|) (= (select |#valid| |parse_input_~input#1.base|) 1) (= 6 |~#commands~0.base|) (<= 3 |parse_input_~input#1.base|) (< |parse_input_#t~mem3#1.offset| (select |#length| |parse_input_#t~mem3#1.base|)) (<= 0 |parse_input_~input#1.offset|) (<= 0 |parse_input_#t~mem3#1.offset|) (= (select |#valid| |parse_input_#t~mem3#1.base|) 1) (= |~#commands~0.offset| 0) (<= |parse_input_~input#1.base| 5) (= |#NULL.offset| 0) (= |parse_input_#in~input#1.offset| 0) (<= 3 |parse_input_#in~input#1.base|) (<= 0 |#StackHeapBarrier|) (<= |parse_input_#in~input#1.base| 5) (<= 0 |parse_input_~i~0#1|) (= |#NULL.base| 0))' at error location [2022-12-14 11:48:15,184 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 11:48:15,184 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 11:48:15,184 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 13 [2022-12-14 11:48:15,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359197924] [2022-12-14 11:48:15,185 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 11:48:15,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-14 11:48:15,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:48:15,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-14 11:48:15,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1099, Unknown=0, NotChecked=0, Total=1260 [2022-12-14 11:48:15,186 INFO L87 Difference]: Start difference. First operand 249 states and 294 transitions. Second operand has 15 states, 10 states have (on average 6.0) internal successors, (60), 10 states have internal predecessors, (60), 4 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-14 11:48:15,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:48:15,526 INFO L93 Difference]: Finished difference Result 257 states and 296 transitions. [2022-12-14 11:48:15,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-14 11:48:15,527 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 10 states have (on average 6.0) internal successors, (60), 10 states have internal predecessors, (60), 4 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 50 [2022-12-14 11:48:15,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:48:15,527 INFO L225 Difference]: With dead ends: 257 [2022-12-14 11:48:15,527 INFO L226 Difference]: Without dead ends: 257 [2022-12-14 11:48:15,528 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 74 SyntacticMatches, 9 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 822 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=290, Invalid=1690, Unknown=0, NotChecked=0, Total=1980 [2022-12-14 11:48:15,528 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 304 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 304 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 11:48:15,529 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [304 Valid, 192 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 11:48:15,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2022-12-14 11:48:15,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 248. [2022-12-14 11:48:15,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 227 states have (on average 1.1894273127753303) internal successors, (270), 235 states have internal predecessors, (270), 6 states have call successors, (6), 6 states have call predecessors, (6), 10 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2022-12-14 11:48:15,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 288 transitions. [2022-12-14 11:48:15,531 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 288 transitions. Word has length 50 [2022-12-14 11:48:15,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:48:15,532 INFO L495 AbstractCegarLoop]: Abstraction has 248 states and 288 transitions. [2022-12-14 11:48:15,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 10 states have (on average 6.0) internal successors, (60), 10 states have internal predecessors, (60), 4 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-14 11:48:15,532 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 288 transitions. [2022-12-14 11:48:15,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-12-14 11:48:15,532 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:48:15,532 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:48:15,537 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-12-14 11:48:15,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-12-14 11:48:15,733 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-14 11:48:15,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:48:15,733 INFO L85 PathProgramCache]: Analyzing trace with hash -920722335, now seen corresponding path program 1 times [2022-12-14 11:48:15,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:48:15,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443755768] [2022-12-14 11:48:15,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:48:15,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:48:15,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:48:16,007 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:48:16,007 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:48:16,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443755768] [2022-12-14 11:48:16,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443755768] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:48:16,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586663812] [2022-12-14 11:48:16,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:48:16,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:48:16,008 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:48:16,009 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:48:16,010 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-12-14 11:48:16,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:48:16,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 26 conjunts are in the unsatisfiable core [2022-12-14 11:48:16,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:48:16,144 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 11:48:16,144 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-12-14 11:48:16,219 WARN L859 $PredicateComparison]: unable to prove that (exists ((|parse_input_c1_~x~0#1.base| Int) (v_ArrVal_176 Int)) (= |c_#valid| (store (store |c_old(#valid)| |parse_input_c1_~x~0#1.base| 1) |c_old(~global~0.base)| v_ArrVal_176))) is different from true [2022-12-14 11:48:16,240 INFO L321 Elim1Store]: treesize reduction 24, result has 38.5 percent of original size [2022-12-14 11:48:16,241 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 23 [2022-12-14 11:48:16,287 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 12 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 5 not checked. [2022-12-14 11:48:16,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:48:16,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [586663812] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:48:16,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [771437983] [2022-12-14 11:48:16,522 INFO L159 IcfgInterpreter]: Started Sifa with 27 locations of interest [2022-12-14 11:48:16,522 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:48:16,522 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:48:16,522 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:48:16,522 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:48:16,596 INFO L321 Elim1Store]: treesize reduction 46, result has 64.6 percent of original size [2022-12-14 11:48:16,596 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 111 [2022-12-14 11:48:16,762 INFO L321 Elim1Store]: treesize reduction 118, result has 27.2 percent of original size [2022-12-14 11:48:16,762 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 35 treesize of output 61 [2022-12-14 11:48:16,864 INFO L321 Elim1Store]: treesize reduction 136, result has 28.0 percent of original size [2022-12-14 11:48:16,864 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 40 treesize of output 73 [2022-12-14 11:48:16,878 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2022-12-14 11:48:16,930 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2022-12-14 11:48:17,193 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 25 for LOIs [2022-12-14 11:48:17,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:48:17,259 INFO L321 Elim1Store]: treesize reduction 110, result has 28.6 percent of original size [2022-12-14 11:48:17,260 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 35 treesize of output 61 [2022-12-14 11:48:17,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:48:17,274 INFO L321 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-12-14 11:48:17,275 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 51 [2022-12-14 11:48:17,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:48:17,374 INFO L321 Elim1Store]: treesize reduction 128, result has 29.3 percent of original size [2022-12-14 11:48:17,374 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 40 treesize of output 73 [2022-12-14 11:48:17,432 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:48:19,515 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '20365#(and (= 6 |~#commands~0.base|) (not (= (select |#valid| |parse_input_~input#1.base|) 1)) (<= 0 ~global~0.offset) (< |parse_input_#t~mem3#1.offset| (select |#length| |parse_input_#t~mem3#1.base|)) (= (select (select |#memory_$Pointer$.offset| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset|)) |parse_input_#t~mem3#1.offset|) (= |parse_input_#in~input#1.base| |parse_input_~input#1.base|) (<= (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset| 4) (select |#length| |~#commands~0.base|)) (= |parse_input_#in~input#1.offset| |parse_input_~input#1.offset|) (<= 0 |parse_input_#t~mem3#1.offset|) (= (select |#valid| |parse_input_#t~mem3#1.base|) 1) (= |~#commands~0.offset| 0) (= |parse_input_#t~mem3#1.base| (select (select |#memory_$Pointer$.base| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset|))) (= |parse_input_~i~0#1| 0) (<= ~global~0.offset 0) (= |#NULL.offset| 0) (= |parse_input_#in~input#1.offset| 0) (<= 3 |parse_input_#in~input#1.base|) (= |old(~global~0.offset)| 0) (<= 0 |#StackHeapBarrier|) (<= |parse_input_#in~input#1.base| 5) (= (select |#valid| |~#commands~0.base|) 1) (= |#NULL.base| 0))' at error location [2022-12-14 11:48:19,515 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 11:48:19,515 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 11:48:19,515 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2022-12-14 11:48:19,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281316073] [2022-12-14 11:48:19,515 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 11:48:19,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-14 11:48:19,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:48:19,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-14 11:48:19,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=1428, Unknown=1, NotChecked=78, Total=1722 [2022-12-14 11:48:19,516 INFO L87 Difference]: Start difference. First operand 248 states and 288 transitions. Second operand has 20 states, 17 states have (on average 4.705882352941177) internal successors, (80), 16 states have internal predecessors, (80), 2 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-14 11:48:20,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:48:20,275 INFO L93 Difference]: Finished difference Result 253 states and 293 transitions. [2022-12-14 11:48:20,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-14 11:48:20,275 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 4.705882352941177) internal successors, (80), 16 states have internal predecessors, (80), 2 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 51 [2022-12-14 11:48:20,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:48:20,276 INFO L225 Difference]: With dead ends: 253 [2022-12-14 11:48:20,276 INFO L226 Difference]: Without dead ends: 253 [2022-12-14 11:48:20,278 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 101 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 784 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=422, Invalid=2337, Unknown=1, NotChecked=102, Total=2862 [2022-12-14 11:48:20,278 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 312 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 365 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 312 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 480 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 62 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 11:48:20,279 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [312 Valid, 265 Invalid, 480 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 365 Invalid, 0 Unknown, 62 Unchecked, 0.2s Time] [2022-12-14 11:48:20,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2022-12-14 11:48:20,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 247. [2022-12-14 11:48:20,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 227 states have (on average 1.1850220264317182) internal successors, (269), 234 states have internal predecessors, (269), 6 states have call successors, (6), 6 states have call predecessors, (6), 10 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2022-12-14 11:48:20,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 287 transitions. [2022-12-14 11:48:20,282 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 287 transitions. Word has length 51 [2022-12-14 11:48:20,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:48:20,282 INFO L495 AbstractCegarLoop]: Abstraction has 247 states and 287 transitions. [2022-12-14 11:48:20,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 4.705882352941177) internal successors, (80), 16 states have internal predecessors, (80), 2 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-14 11:48:20,282 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 287 transitions. [2022-12-14 11:48:20,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-12-14 11:48:20,283 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:48:20,283 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:48:20,288 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-12-14 11:48:20,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:48:20,484 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-14 11:48:20,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:48:20,485 INFO L85 PathProgramCache]: Analyzing trace with hash 1822194776, now seen corresponding path program 1 times [2022-12-14 11:48:20,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:48:20,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293057568] [2022-12-14 11:48:20,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:48:20,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:48:20,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:48:20,936 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:48:20,936 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:48:20,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293057568] [2022-12-14 11:48:20,936 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293057568] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:48:20,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673010791] [2022-12-14 11:48:20,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:48:20,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:48:20,937 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:48:20,937 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:48:20,938 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-12-14 11:48:20,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:48:21,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 32 conjunts are in the unsatisfiable core [2022-12-14 11:48:21,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:48:21,192 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 11:48:21,193 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-12-14 11:48:21,436 INFO L321 Elim1Store]: treesize reduction 24, result has 38.5 percent of original size [2022-12-14 11:48:21,436 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 23 [2022-12-14 11:48:21,535 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 11:48:21,563 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 12 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:48:21,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:48:21,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1673010791] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:48:21,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [452746054] [2022-12-14 11:48:21,660 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2022-12-14 11:48:21,660 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:48:21,661 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:48:21,661 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:48:21,661 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:48:21,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:48:21,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:48:21,787 INFO L321 Elim1Store]: treesize reduction 165, result has 19.9 percent of original size [2022-12-14 11:48:21,788 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 196 treesize of output 210 [2022-12-14 11:48:21,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:48:21,833 INFO L321 Elim1Store]: treesize reduction 187, result has 29.7 percent of original size [2022-12-14 11:48:21,834 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 12 case distinctions, treesize of input 185 treesize of output 230 [2022-12-14 11:48:21,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:48:22,000 INFO L321 Elim1Store]: treesize reduction 240, result has 28.8 percent of original size [2022-12-14 11:48:22,000 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 5 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 17 case distinctions, treesize of input 379 treesize of output 404 [2022-12-14 11:48:22,376 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 25 for LOIs [2022-12-14 11:48:22,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:48:22,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:48:22,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:48:22,690 INFO L321 Elim1Store]: treesize reduction 157, result has 20.7 percent of original size [2022-12-14 11:48:22,690 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 232 treesize of output 246 [2022-12-14 11:48:22,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:48:22,764 INFO L321 Elim1Store]: treesize reduction 197, result has 30.9 percent of original size [2022-12-14 11:48:22,765 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 13 case distinctions, treesize of input 221 treesize of output 270 [2022-12-14 11:48:23,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:48:23,081 INFO L321 Elim1Store]: treesize reduction 232, result has 29.5 percent of original size [2022-12-14 11:48:23,081 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 16 case distinctions, treesize of input 547 treesize of output 551 [2022-12-14 11:48:23,878 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:48:29,888 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '21148#(and (<= 0 ~global~0.offset) (<= ~global~0.offset 0) (<= 3 |parse_input_#in~input#1.base|) (not (= (select |#valid| |parse_input_#t~mem3#1.base|) 1)) (or (and (= (select |#valid| |parse_input_~input#1.base|) 1) (= 6 |~#commands~0.base|) (< |parse_input_~input#1.offset| (select |#length| |parse_input_~input#1.base|)) (< (select (select |#memory_$Pointer$.offset| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) (- 9) |~#commands~0.offset|)) (select |#length| (select (select |#memory_$Pointer$.base| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) (- 9) |~#commands~0.offset|)))) (= (select (select |#memory_$Pointer$.offset| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset|)) |parse_input_#t~mem3#1.offset|) (= |parse_input_#in~input#1.base| |parse_input_~input#1.base|) (= |parse_input_~i~0#1| 1) (<= (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset| 4) (select |#length| |~#commands~0.base|)) (= |parse_input_#in~input#1.offset| |parse_input_~input#1.offset|) (= (select |#valid| (select (select |#memory_$Pointer$.base| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) (- 9) |~#commands~0.offset|))) 1) (= |~#commands~0.offset| 0) (= |parse_input_#t~mem3#1.base| (select (select |#memory_$Pointer$.base| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset|))) (= |#NULL.offset| 0) (= |parse_input_#in~input#1.offset| 0) (<= 0 (select (select |#memory_$Pointer$.offset| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) (- 9) |~#commands~0.offset|))) (= |old(~global~0.offset)| 0) (= (select |#valid| |~#commands~0.base|) 1) (= |#NULL.base| 0)) (and (= 6 |~#commands~0.base|) (= (select (select |#memory_$Pointer$.offset| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset|)) |parse_input_#t~mem3#1.offset|) (= |parse_input_#in~input#1.base| |parse_input_~input#1.base|) (<= (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset| 4) (select |#length| |~#commands~0.base|)) (= |parse_input_#in~input#1.offset| |parse_input_~input#1.offset|) (= |~#commands~0.offset| 0) (= |parse_input_#t~mem3#1.base| (select (select |#memory_$Pointer$.base| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset|))) (= |parse_input_~i~0#1| 0) (= |#NULL.offset| 0) (= |parse_input_#in~input#1.offset| 0) (= |old(~global~0.offset)| 0) (= (select |#valid| |~#commands~0.base|) 1) (= |#NULL.base| 0))) (<= 0 |#StackHeapBarrier|) (<= |parse_input_#in~input#1.base| 5))' at error location [2022-12-14 11:48:29,888 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 11:48:29,888 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 11:48:29,888 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 25 [2022-12-14 11:48:29,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603259048] [2022-12-14 11:48:29,889 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 11:48:29,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-12-14 11:48:29,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:48:29,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-12-14 11:48:29,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=2207, Unknown=6, NotChecked=0, Total=2450 [2022-12-14 11:48:29,890 INFO L87 Difference]: Start difference. First operand 247 states and 287 transitions. Second operand has 27 states, 23 states have (on average 4.521739130434782) internal successors, (104), 23 states have internal predecessors, (104), 5 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-14 11:48:31,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:48:31,024 INFO L93 Difference]: Finished difference Result 318 states and 363 transitions. [2022-12-14 11:48:31,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-14 11:48:31,024 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 23 states have (on average 4.521739130434782) internal successors, (104), 23 states have internal predecessors, (104), 5 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 57 [2022-12-14 11:48:31,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:48:31,025 INFO L225 Difference]: With dead ends: 318 [2022-12-14 11:48:31,025 INFO L226 Difference]: Without dead ends: 318 [2022-12-14 11:48:31,026 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 91 SyntacticMatches, 3 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1148 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=528, Invalid=3498, Unknown=6, NotChecked=0, Total=4032 [2022-12-14 11:48:31,026 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 550 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 513 mSolverCounterSat, 97 mSolverCounterUnsat, 17 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 550 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 513 IncrementalHoareTripleChecker+Invalid, 17 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 11:48:31,026 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [550 Valid, 220 Invalid, 627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 513 Invalid, 17 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 11:48:31,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2022-12-14 11:48:31,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 244. [2022-12-14 11:48:31,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 225 states have (on average 1.1822222222222223) internal successors, (266), 231 states have internal predecessors, (266), 6 states have call successors, (6), 6 states have call predecessors, (6), 10 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2022-12-14 11:48:31,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 284 transitions. [2022-12-14 11:48:31,029 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 284 transitions. Word has length 57 [2022-12-14 11:48:31,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:48:31,029 INFO L495 AbstractCegarLoop]: Abstraction has 244 states and 284 transitions. [2022-12-14 11:48:31,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 23 states have (on average 4.521739130434782) internal successors, (104), 23 states have internal predecessors, (104), 5 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-14 11:48:31,030 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 284 transitions. [2022-12-14 11:48:31,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-12-14 11:48:31,030 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:48:31,030 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:48:31,035 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-12-14 11:48:31,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:48:31,232 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting parse_inputErr16ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-14 11:48:31,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:48:31,233 INFO L85 PathProgramCache]: Analyzing trace with hash 631491711, now seen corresponding path program 1 times [2022-12-14 11:48:31,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:48:31,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657746467] [2022-12-14 11:48:31,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:48:31,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:48:31,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:48:31,308 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 30 proven. 2 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-12-14 11:48:31,308 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:48:31,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657746467] [2022-12-14 11:48:31,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657746467] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:48:31,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783477281] [2022-12-14 11:48:31,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:48:31,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:48:31,309 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:48:31,309 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:48:31,310 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-12-14 11:48:31,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:48:31,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 11:48:31,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:48:31,383 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 30 proven. 2 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-12-14 11:48:31,384 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:48:31,404 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 30 proven. 2 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-12-14 11:48:31,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1783477281] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:48:31,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [981508675] [2022-12-14 11:48:31,405 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2022-12-14 11:48:31,405 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:48:31,405 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:48:31,405 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:48:31,405 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:48:31,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:48:31,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:48:31,585 INFO L321 Elim1Store]: treesize reduction 165, result has 19.9 percent of original size [2022-12-14 11:48:31,586 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 196 treesize of output 210 [2022-12-14 11:48:31,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:48:31,634 INFO L321 Elim1Store]: treesize reduction 187, result has 29.7 percent of original size [2022-12-14 11:48:31,634 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 12 case distinctions, treesize of input 185 treesize of output 230 [2022-12-14 11:48:31,893 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 35 for LOIs [2022-12-14 11:48:32,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:48:32,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:48:32,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:48:32,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:48:32,114 INFO L321 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-12-14 11:48:32,114 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 35 [2022-12-14 11:48:32,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:48:32,147 INFO L321 Elim1Store]: treesize reduction 70, result has 28.6 percent of original size [2022-12-14 11:48:32,147 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 27 treesize of output 45 [2022-12-14 11:48:32,312 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:48:34,378 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '22104#(and (<= |parse_input_~input#1.offset| 0) (= |parse_input_c1_~x~0#1.offset| 0) (<= 0 |#NULL.base|) (= (select |#valid| |parse_input_~input#1.base|) 1) (<= 6 |~#commands~0.base|) (= |parse_input_#t~mem6#1.base| (select (select |#memory_$Pointer$.base| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset| 4))) (not (= |parse_input_c1_~x~0#1.base| 0)) (= |parse_input_##fun~~TO~VOID_#in~#fp#1.base| |parse_input_#t~mem6#1.base|) (<= 3 |parse_input_~input#1.base|) (< |parse_input_~input#1.offset| (select |#length| |parse_input_~input#1.base|)) (<= |#NULL.offset| 0) (<= 0 |parse_input_~input#1.offset|) (= (select |#valid| |parse_input_c1_~x~0#1.base|) 1) (not (= ~global~0.offset 0)) (= (select |#length| |parse_input_c1_~x~0#1.base|) 1) (<= |~#commands~0.base| 6) (<= 0 |parse_input_#in~input#1.offset|) (<= 0 |~#commands~0.offset|) (= |parse_input_#t~mem6#1.offset| |parse_input_##fun~~TO~VOID_#in~#fp#1.offset|) (<= (select (select |#memory_int| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset| 8)) ~state~0) (<= |parse_input_#in~input#1.offset| 0) (<= |#NULL.base| 0) (= |parse_input_#t~mem6#1.offset| (select (select |#memory_$Pointer$.offset| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset| 4))) (not (= |parse_input_c1_~x~0#1.base| |parse_input_~input#1.base|)) (<= |parse_input_~input#1.base| 5) (< |parse_input_c1_~x~0#1.base| |#StackHeapBarrier|) (<= 3 |parse_input_#in~input#1.base|) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (<= |parse_input_#in~input#1.base| 5) (<= 0 |parse_input_~i~0#1|) (<= (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset| 9) (select |#length| |~#commands~0.base|)) (or (not (= |parse_input_##fun~~TO~VOID_#in~#fp#1.offset| |#funAddr~c2.offset|)) (not (= |parse_input_##fun~~TO~VOID_#in~#fp#1.base| |#funAddr~c2.base|))) (<= |~#commands~0.offset| 0) (= (select |#valid| |~#commands~0.base|) 1))' at error location [2022-12-14 11:48:34,378 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 11:48:34,378 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 11:48:34,378 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 3 [2022-12-14 11:48:34,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567939403] [2022-12-14 11:48:34,379 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 11:48:34,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 11:48:34,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:48:34,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 11:48:34,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=355, Unknown=0, NotChecked=0, Total=462 [2022-12-14 11:48:34,379 INFO L87 Difference]: Start difference. First operand 244 states and 284 transitions. Second operand has 4 states, 3 states have (on average 12.666666666666666) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-14 11:48:34,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:48:34,399 INFO L93 Difference]: Finished difference Result 249 states and 288 transitions. [2022-12-14 11:48:34,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 11:48:34,399 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 12.666666666666666) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 58 [2022-12-14 11:48:34,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:48:34,400 INFO L225 Difference]: With dead ends: 249 [2022-12-14 11:48:34,400 INFO L226 Difference]: Without dead ends: 249 [2022-12-14 11:48:34,400 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 147 SyntacticMatches, 10 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=113, Invalid=393, Unknown=0, NotChecked=0, Total=506 [2022-12-14 11:48:34,401 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 27 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 11:48:34,401 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 55 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 11:48:34,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2022-12-14 11:48:34,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 242. [2022-12-14 11:48:34,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 224 states have (on average 1.1741071428571428) internal successors, (263), 229 states have internal predecessors, (263), 6 states have call successors, (6), 6 states have call predecessors, (6), 10 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2022-12-14 11:48:34,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 281 transitions. [2022-12-14 11:48:34,404 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 281 transitions. Word has length 58 [2022-12-14 11:48:34,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:48:34,404 INFO L495 AbstractCegarLoop]: Abstraction has 242 states and 281 transitions. [2022-12-14 11:48:34,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 12.666666666666666) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-14 11:48:34,404 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 281 transitions. [2022-12-14 11:48:34,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-12-14 11:48:34,404 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:48:34,404 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:48:34,409 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-12-14 11:48:34,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-12-14 11:48:34,605 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting parse_inputErr18ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-14 11:48:34,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:48:34,606 INFO L85 PathProgramCache]: Analyzing trace with hash 635004488, now seen corresponding path program 1 times [2022-12-14 11:48:34,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:48:34,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535823218] [2022-12-14 11:48:34,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:48:34,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:48:34,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:48:34,800 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 24 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:48:34,800 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:48:34,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535823218] [2022-12-14 11:48:34,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535823218] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:48:34,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603905343] [2022-12-14 11:48:34,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:48:34,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:48:34,800 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:48:34,801 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:48:34,802 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-12-14 11:48:34,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:48:34,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 29 conjunts are in the unsatisfiable core [2022-12-14 11:48:34,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:48:34,875 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 11:48:34,948 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 11:48:34,949 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 21 [2022-12-14 11:48:34,964 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-12-14 11:48:34,964 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2022-12-14 11:48:34,971 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 26 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:48:34,971 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:48:35,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [603905343] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:48:35,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [447273067] [2022-12-14 11:48:35,016 INFO L159 IcfgInterpreter]: Started Sifa with 27 locations of interest [2022-12-14 11:48:35,016 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 11:48:35,016 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 11:48:35,016 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 11:48:35,016 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 11:48:35,075 INFO L321 Elim1Store]: treesize reduction 118, result has 27.2 percent of original size [2022-12-14 11:48:35,075 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 35 treesize of output 61 [2022-12-14 11:48:35,087 INFO L321 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2022-12-14 11:48:35,087 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 51 [2022-12-14 11:48:35,151 INFO L321 Elim1Store]: treesize reduction 136, result has 28.0 percent of original size [2022-12-14 11:48:35,151 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 40 treesize of output 73 [2022-12-14 11:48:35,383 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 25 for LOIs [2022-12-14 11:48:35,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:48:35,467 INFO L321 Elim1Store]: treesize reduction 46, result has 62.3 percent of original size [2022-12-14 11:48:35,467 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 43 treesize of output 103 [2022-12-14 11:48:35,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:48:35,565 INFO L321 Elim1Store]: treesize reduction 110, result has 28.6 percent of original size [2022-12-14 11:48:35,565 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 35 treesize of output 61 [2022-12-14 11:48:35,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:48:35,678 INFO L321 Elim1Store]: treesize reduction 128, result has 29.3 percent of original size [2022-12-14 11:48:35,678 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 40 treesize of output 73 [2022-12-14 11:48:35,698 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2022-12-14 11:48:35,738 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2022-12-14 11:48:35,769 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2022-12-14 11:48:35,825 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 11:48:38,253 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '22868#(and (= |parse_input_c1_~x~0#1.offset| 0) (not (= ~global~0.base 0)) (= (select |#valid| |parse_input_~input#1.base|) 1) (not (= (select |#valid| ~global~0.base) 1)) (= 6 |~#commands~0.base|) (= |parse_input_#t~mem6#1.base| (select (select |#memory_$Pointer$.base| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset| 4))) (not (= |parse_input_c1_~x~0#1.base| 0)) (= |parse_input_##fun~~TO~VOID_#in~#fp#1.base| |parse_input_#t~mem6#1.base|) (< |parse_input_~input#1.offset| (select |#length| |parse_input_~input#1.base|)) (= |parse_input_#in~input#1.base| |parse_input_~input#1.base|) (= (select |#valid| |parse_input_c1_~x~0#1.base|) 1) (= (select |#length| |parse_input_c1_~x~0#1.base|) 1) (= |parse_input_#in~input#1.offset| |parse_input_~input#1.offset|) (< ~global~0.base |#StackHeapBarrier|) (= ~global~0.offset 0) (<= 0 (select (select |#memory_$Pointer$.offset| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset|))) (= |parse_input_#t~mem6#1.offset| |parse_input_##fun~~TO~VOID_#in~#fp#1.offset|) (<= (select (select |#memory_int| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset| 8)) ~state~0) (= |~#commands~0.offset| 0) (= |parse_input_~i~0#1| 0) (= |parse_input_#t~mem6#1.offset| (select (select |#memory_$Pointer$.offset| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset| 4))) (not (= |parse_input_c1_~x~0#1.base| |parse_input_~input#1.base|)) (not (= |parse_input_c1_~x~0#1.base| (select (select |#memory_$Pointer$.base| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset|)))) (= |#NULL.offset| 0) (< (select (select |#memory_$Pointer$.offset| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset|)) (select |#length| (select (select |#memory_$Pointer$.base| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset|)))) (= |parse_input_#in~input#1.offset| 0) (< |parse_input_c1_~x~0#1.base| |#StackHeapBarrier|) (<= 3 |parse_input_#in~input#1.base|) (= |old(~global~0.offset)| 0) (= (select |#valid| (select (select |#memory_$Pointer$.base| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset|))) 1) (<= 0 |#StackHeapBarrier|) (<= |parse_input_#in~input#1.base| 5) (<= (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset| 9) (select |#length| |~#commands~0.base|)) (or (not (= |parse_input_##fun~~TO~VOID_#in~#fp#1.offset| |#funAddr~c2.offset|)) (not (= |parse_input_##fun~~TO~VOID_#in~#fp#1.base| |#funAddr~c2.base|))) (= (select |#valid| |~#commands~0.base|) 1) (= |#NULL.base| 0))' at error location [2022-12-14 11:48:38,253 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 11:48:38,253 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 11:48:38,253 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2022-12-14 11:48:38,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952687944] [2022-12-14 11:48:38,253 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 11:48:38,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-14 11:48:38,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:48:38,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-14 11:48:38,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=785, Unknown=0, NotChecked=0, Total=930 [2022-12-14 11:48:38,254 INFO L87 Difference]: Start difference. First operand 242 states and 281 transitions. Second operand has 11 states, 10 states have (on average 6.7) internal successors, (67), 11 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-12-14 11:48:38,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:48:38,460 INFO L93 Difference]: Finished difference Result 294 states and 339 transitions. [2022-12-14 11:48:38,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-14 11:48:38,461 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 6.7) internal successors, (67), 11 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 62 [2022-12-14 11:48:38,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:48:38,461 INFO L225 Difference]: With dead ends: 294 [2022-12-14 11:48:38,461 INFO L226 Difference]: Without dead ends: 294 [2022-12-14 11:48:38,461 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 118 SyntacticMatches, 7 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=184, Invalid=1076, Unknown=0, NotChecked=0, Total=1260 [2022-12-14 11:48:38,462 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 38 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 11:48:38,462 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 224 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 11:48:38,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2022-12-14 11:48:38,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 282. [2022-12-14 11:48:38,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 261 states have (on average 1.1724137931034482) internal successors, (306), 267 states have internal predecessors, (306), 7 states have call successors, (7), 7 states have call predecessors, (7), 12 states have return successors, (15), 7 states have call predecessors, (15), 7 states have call successors, (15) [2022-12-14 11:48:38,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 328 transitions. [2022-12-14 11:48:38,465 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 328 transitions. Word has length 62 [2022-12-14 11:48:38,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:48:38,465 INFO L495 AbstractCegarLoop]: Abstraction has 282 states and 328 transitions. [2022-12-14 11:48:38,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 6.7) internal successors, (67), 11 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-12-14 11:48:38,465 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 328 transitions. [2022-12-14 11:48:38,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-12-14 11:48:38,465 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:48:38,465 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:48:38,471 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-12-14 11:48:38,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-12-14 11:48:38,667 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting parse_inputErr18ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-14 11:48:38,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:48:38,667 INFO L85 PathProgramCache]: Analyzing trace with hash 476729907, now seen corresponding path program 1 times [2022-12-14 11:48:38,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:48:38,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324508896] [2022-12-14 11:48:38,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:48:38,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:48:38,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:48:38,760 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 33 proven. 2 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-12-14 11:48:38,760 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 11:48:38,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324508896] [2022-12-14 11:48:38,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324508896] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:48:38,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434828632] [2022-12-14 11:48:38,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:48:38,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:48:38,761 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:48:38,761 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:48:38,762 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-12-14 11:48:38,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:48:38,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-14 11:48:38,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:48:38,879 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 33 proven. 2 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-12-14 11:48:38,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:48:38,981 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-12-14 11:48:38,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1434828632] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-14 11:48:38,981 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-14 11:48:38,982 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4, 5] total 9 [2022-12-14 11:48:38,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471874104] [2022-12-14 11:48:38,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:48:38,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 11:48:38,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 11:48:38,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 11:48:38,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-12-14 11:48:38,982 INFO L87 Difference]: Start difference. First operand 282 states and 328 transitions. Second operand has 6 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-14 11:48:39,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:48:39,018 INFO L93 Difference]: Finished difference Result 258 states and 294 transitions. [2022-12-14 11:48:39,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 11:48:39,018 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 63 [2022-12-14 11:48:39,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:48:39,019 INFO L225 Difference]: With dead ends: 258 [2022-12-14 11:48:39,019 INFO L226 Difference]: Without dead ends: 250 [2022-12-14 11:48:39,019 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2022-12-14 11:48:39,019 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 48 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 11:48:39,019 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 155 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 11:48:39,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2022-12-14 11:48:39,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 196. [2022-12-14 11:48:39,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 183 states have (on average 1.1639344262295082) internal successors, (213), 185 states have internal predecessors, (213), 5 states have call successors, (5), 5 states have call predecessors, (5), 7 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-12-14 11:48:39,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 225 transitions. [2022-12-14 11:48:39,022 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 225 transitions. Word has length 63 [2022-12-14 11:48:39,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:48:39,022 INFO L495 AbstractCegarLoop]: Abstraction has 196 states and 225 transitions. [2022-12-14 11:48:39,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-14 11:48:39,022 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 225 transitions. [2022-12-14 11:48:39,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-12-14 11:48:39,023 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:48:39,023 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:48:39,027 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-12-14 11:48:39,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:48:39,224 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-14 11:48:39,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:48:39,225 INFO L85 PathProgramCache]: Analyzing trace with hash 1831591415, now seen corresponding path program 1 times [2022-12-14 11:48:39,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 11:48:39,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775720607] [2022-12-14 11:48:39,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:48:39,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 11:48:39,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-14 11:48:39,268 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-14 11:48:39,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-14 11:48:39,295 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-12-14 11:48:39,295 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-14 11:48:39,296 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK (19 of 20 remaining) [2022-12-14 11:48:39,297 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 20 remaining) [2022-12-14 11:48:39,297 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 20 remaining) [2022-12-14 11:48:39,298 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (16 of 20 remaining) [2022-12-14 11:48:39,298 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (15 of 20 remaining) [2022-12-14 11:48:39,298 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE (14 of 20 remaining) [2022-12-14 11:48:39,298 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE (13 of 20 remaining) [2022-12-14 11:48:39,298 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 20 remaining) [2022-12-14 11:48:39,298 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 20 remaining) [2022-12-14 11:48:39,298 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 20 remaining) [2022-12-14 11:48:39,298 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 20 remaining) [2022-12-14 11:48:39,298 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr10ASSERT_VIOLATIONMEMORY_FREE (8 of 20 remaining) [2022-12-14 11:48:39,298 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr11ASSERT_VIOLATIONMEMORY_FREE (7 of 20 remaining) [2022-12-14 11:48:39,298 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr12ASSERT_VIOLATIONMEMORY_FREE (6 of 20 remaining) [2022-12-14 11:48:39,298 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr13ASSERT_VIOLATIONMEMORY_FREE (5 of 20 remaining) [2022-12-14 11:48:39,298 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr14ASSERT_VIOLATIONMEMORY_FREE (4 of 20 remaining) [2022-12-14 11:48:39,298 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr15ASSERT_VIOLATIONMEMORY_FREE (3 of 20 remaining) [2022-12-14 11:48:39,298 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr16ASSERT_VIOLATIONMEMORY_FREE (2 of 20 remaining) [2022-12-14 11:48:39,298 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr17ASSERT_VIOLATIONMEMORY_FREE (1 of 20 remaining) [2022-12-14 11:48:39,299 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr18ASSERT_VIOLATIONMEMORY_FREE (0 of 20 remaining) [2022-12-14 11:48:39,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-12-14 11:48:39,301 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:48:39,303 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-12-14 11:48:39,336 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.12 11:48:39 BoogieIcfgContainer [2022-12-14 11:48:39,336 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-12-14 11:48:39,337 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-12-14 11:48:39,337 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-12-14 11:48:39,337 INFO L275 PluginConnector]: Witness Printer initialized [2022-12-14 11:48:39,337 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 11:46:16" (3/4) ... [2022-12-14 11:48:39,340 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-12-14 11:48:39,340 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-12-14 11:48:39,340 INFO L158 Benchmark]: Toolchain (without parser) took 143607.59ms. Allocated memory was 136.3MB in the beginning and 197.1MB in the end (delta: 60.8MB). Free memory was 103.7MB in the beginning and 72.1MB in the end (delta: 31.6MB). Peak memory consumption was 93.8MB. Max. memory is 16.1GB. [2022-12-14 11:48:39,340 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 136.3MB. Free memory is still 77.6MB. There was no memory consumed. Max. memory is 16.1GB. [2022-12-14 11:48:39,340 INFO L158 Benchmark]: CACSL2BoogieTranslator took 351.05ms. Allocated memory is still 136.3MB. Free memory was 103.7MB in the beginning and 84.3MB in the end (delta: 19.4MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. [2022-12-14 11:48:39,341 INFO L158 Benchmark]: Boogie Procedure Inliner took 31.49ms. Allocated memory is still 136.3MB. Free memory was 84.3MB in the beginning and 82.0MB in the end (delta: 2.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-14 11:48:39,341 INFO L158 Benchmark]: Boogie Preprocessor took 20.53ms. Allocated memory is still 136.3MB. Free memory was 82.0MB in the beginning and 80.1MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-14 11:48:39,341 INFO L158 Benchmark]: RCFGBuilder took 361.94ms. Allocated memory is still 136.3MB. Free memory was 80.1MB in the beginning and 63.1MB in the end (delta: 17.0MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2022-12-14 11:48:39,341 INFO L158 Benchmark]: TraceAbstraction took 142834.19ms. Allocated memory was 136.3MB in the beginning and 197.1MB in the end (delta: 60.8MB). Free memory was 62.5MB in the beginning and 72.1MB in the end (delta: -9.6MB). Peak memory consumption was 51.8MB. Max. memory is 16.1GB. [2022-12-14 11:48:39,341 INFO L158 Benchmark]: Witness Printer took 3.04ms. Allocated memory is still 197.1MB. Free memory is still 72.1MB. There was no memory consumed. Max. memory is 16.1GB. [2022-12-14 11:48:39,342 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 136.3MB. Free memory is still 77.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 351.05ms. Allocated memory is still 136.3MB. Free memory was 103.7MB in the beginning and 84.3MB in the end (delta: 19.4MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 31.49ms. Allocated memory is still 136.3MB. Free memory was 84.3MB in the beginning and 82.0MB in the end (delta: 2.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 20.53ms. Allocated memory is still 136.3MB. Free memory was 82.0MB in the beginning and 80.1MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 361.94ms. Allocated memory is still 136.3MB. Free memory was 80.1MB in the beginning and 63.1MB in the end (delta: 17.0MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * TraceAbstraction took 142834.19ms. Allocated memory was 136.3MB in the beginning and 197.1MB in the end (delta: 60.8MB). Free memory was 62.5MB in the beginning and 72.1MB in the end (delta: -9.6MB). Peak memory consumption was 51.8MB. Max. memory is 16.1GB. * Witness Printer took 3.04ms. Allocated memory is still 197.1MB. Free memory is still 72.1MB. There was no memory consumed. 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 - UnprovableResult [Line: 721]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of strcmp at line 693. Possible FailurePath: [L685] int state = STATE_1; [L686] char *global = 0; [L687-L690] const struct command commands[] = { {"c1",c1,STATE_1}, {"c2",c2,STATE_2} }; [L722] CALL parse_input("c1") VAL [\old(global)={0:0}, \old(state)=0, commands={6:0}, global={0:0}, state=0] [L692] int i = 0; VAL [\old(global)={0:0}, \old(state)=0, commands={6:0}, global={0:0}, i=0, input={3:0}, input={3:0}, state=0] [L692] COND TRUE i < 2 VAL [\old(global)={0:0}, \old(state)=0, commands={6:0}, global={0:0}, i=0, input={3:0}, input={3:0}, state=0] [L693] EXPR commands[i].name VAL [\old(global)={0:0}, \old(state)=0, commands={6:0}, commands[i].name={1:0}, global={0:0}, i=0, input={3:0}, input={3:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)={0:0}, \old(state)=0, commands={6:0}, commands[i].name={1:0}, global={0:0}, i=0, input={3:0}, input={3:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)={0:0}, \old(state)=0, commands={6:0}, commands[i].name={1:0}, global={0:0}, i=0, input={3:0}, input={3:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)={0:0}, \old(state)=0, commands={6:0}, commands[i].name={1:0}, global={0:0}, i=0, input={3:0}, input={3:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)={0:0}, \old(state)=0, commands={6:0}, commands[i].name={1:0}, global={0:0}, i=0, input={3:0}, input={3:0}, state=0] [L693] COND FALSE !(strcmp(commands[i].name,input) == 0) [L692] i++ VAL [\old(global)={0:0}, \old(state)=0, commands={6:0}, global={0:0}, i=1, input={3:0}, input={3:0}, state=0] [L692] COND TRUE i < 2 VAL [\old(global)={0:0}, \old(state)=0, commands={6:0}, global={0:0}, i=1, input={3:0}, input={3:0}, state=0] [L693] EXPR commands[i].name VAL [\old(global)={0:0}, \old(state)=0, commands={6:0}, commands[i].name={2:0}, global={0:0}, i=1, input={3:0}, input={3:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)={0:0}, \old(state)=0, commands={6:0}, commands[i].name={2:0}, global={0:0}, i=1, input={3:0}, input={3:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)={0:0}, \old(state)=0, commands={6:0}, commands[i].name={2:0}, global={0:0}, i=1, input={3:0}, input={3:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)={0:0}, \old(state)=0, commands={6:0}, commands[i].name={2:0}, global={0:0}, i=1, input={3:0}, input={3:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)={0:0}, \old(state)=0, commands={6:0}, commands[i].name={2:0}, global={0:0}, i=1, input={3:0}, input={3:0}, state=0] [L693] COND FALSE !(strcmp(commands[i].name,input) == 0) [L692] i++ VAL [\old(global)={0:0}, \old(state)=0, commands={6:0}, global={0:0}, i=2, input={3:0}, input={3:0}, state=0] [L692] COND FALSE !(i < 2) VAL [\old(global)={0:0}, \old(state)=0, commands={6:0}, global={0:0}, i=2, input={3:0}, input={3:0}, state=0] [L722] RET parse_input("c1") VAL [commands={6:0}, global={0:0}, state=0] [L723] CALL parse_input("c1") VAL [\old(global)={0:0}, \old(state)=0, commands={6:0}, global={0:0}, state=0] [L692] int i = 0; VAL [\old(global)={0:0}, \old(state)=0, commands={6:0}, global={0:0}, i=0, input={4:0}, input={4:0}, state=0] [L692] COND TRUE i < 2 VAL [\old(global)={0:0}, \old(state)=0, commands={6:0}, global={0:0}, i=0, input={4:0}, input={4:0}, state=0] [L693] EXPR commands[i].name VAL [\old(global)={0:0}, \old(state)=0, commands={6:0}, commands[i].name={1:0}, global={0:0}, i=0, input={4:0}, input={4:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)={0:0}, \old(state)=0, commands={6:0}, commands[i].name={1:0}, global={0:0}, i=0, input={4:0}, input={4:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)={0:0}, \old(state)=0, commands={6:0}, commands[i].name={1:0}, global={0:0}, i=0, input={4:0}, input={4:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)={0:0}, \old(state)=0, commands={6:0}, commands[i].name={1:0}, global={0:0}, i=0, input={4:0}, input={4:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)={0:0}, \old(state)=0, commands={6:0}, commands[i].name={1:0}, global={0:0}, i=0, input={4:0}, input={4:0}, state=0] [L693] COND FALSE !(strcmp(commands[i].name,input) == 0) [L692] i++ VAL [\old(global)={0:0}, \old(state)=0, commands={6:0}, global={0:0}, i=1, input={4:0}, input={4:0}, state=0] [L692] COND TRUE i < 2 VAL [\old(global)={0:0}, \old(state)=0, commands={6:0}, global={0:0}, i=1, input={4:0}, input={4:0}, state=0] [L693] EXPR commands[i].name VAL [\old(global)={0:0}, \old(state)=0, commands={6:0}, commands[i].name={2:0}, global={0:0}, i=1, input={4:0}, input={4:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)={0:0}, \old(state)=0, commands={6:0}, commands[i].name={2:0}, global={0:0}, i=1, input={4:0}, input={4:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)={0:0}, \old(state)=0, commands={6:0}, commands[i].name={2:0}, global={0:0}, i=1, input={4:0}, input={4:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)={0:0}, \old(state)=0, commands={6:0}, commands[i].name={2:0}, global={0:0}, i=1, input={4:0}, input={4:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)={0:0}, \old(state)=0, commands={6:0}, commands[i].name={2:0}, global={0:0}, i=1, input={4:0}, input={4:0}, state=0] [L693] COND FALSE !(strcmp(commands[i].name,input) == 0) [L692] i++ VAL [\old(global)={0:0}, \old(state)=0, commands={6:0}, global={0:0}, i=2, input={4:0}, input={4:0}, state=0] [L692] COND FALSE !(i < 2) VAL [\old(global)={0:0}, \old(state)=0, commands={6:0}, global={0:0}, i=2, input={4:0}, input={4:0}, state=0] [L723] RET parse_input("c1") VAL [commands={6:0}, global={0:0}, state=0] [L724] CALL parse_input("c2") VAL [\old(global)={0:0}, \old(state)=0, commands={6:0}, global={0:0}, state=0] [L692] int i = 0; VAL [\old(global)={0:0}, \old(state)=0, commands={6:0}, global={0:0}, i=0, input={5:0}, input={5:0}, state=0] [L692] COND TRUE i < 2 VAL [\old(global)={0:0}, \old(state)=0, commands={6:0}, global={0:0}, i=0, input={5:0}, input={5:0}, state=0] [L693] EXPR commands[i].name VAL [\old(global)={0:0}, \old(state)=0, commands={6:0}, commands[i].name={1:0}, global={0:0}, i=0, input={5:0}, input={5:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)={0:0}, \old(state)=0, commands={6:0}, commands[i].name={1:0}, global={0:0}, i=0, input={5:0}, input={5:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)={0:0}, \old(state)=0, commands={6:0}, commands[i].name={1:0}, global={0:0}, i=0, input={5:0}, input={5:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)={0:0}, \old(state)=0, commands={6:0}, commands[i].name={1:0}, global={0:0}, i=0, input={5:0}, input={5:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)={0:0}, \old(state)=0, commands={6:0}, commands[i].name={1:0}, global={0:0}, i=0, input={5:0}, input={5:0}, state=0] [L693] COND TRUE strcmp(commands[i].name,input) == 0 [L694] EXPR commands[i].state_needed VAL [\old(global)={0:0}, \old(state)=0, commands={6:0}, commands[i].state_needed=0, global={0:0}, i=0, input={5:0}, input={5:0}, state=0] [L694] COND TRUE state >= commands[i].state_needed [L695] EXPR commands[i].function [L695] CALL commands[i].function() [L702] char *x = (char *)malloc(sizeof(char)); [L703] COND FALSE !(!x) VAL [\old(global)={0:0}, \old(state)=0, commands={6:0}, global={0:0}, state=0, x={-3:0}] [L706] COND FALSE !(\read(*global)) VAL [\old(global)={0:0}, \old(state)=0, commands={6:0}, global={0:0}, state=0, x={-3:0}] [L709] global = x [L710] state = STATE_2 VAL [\old(global)={0:0}, \old(state)=0, commands={6:0}, global={-3:0}, state=1, x={-3:0}] [L695] RET commands[i].function() [L724] RET parse_input("c2") VAL [commands={6:0}, global={-3:0}, state=1] [L725] return 0; VAL [\result=0, commands={6:0}, global={-3:0}, state=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: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 693]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 693]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 693]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 693]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 717]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 717]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 717]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 718]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 718]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 718]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 707]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 707]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 707]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 58 locations, 20 error locations. Started 1 CEGAR loops. OverallTime: 142.8s, OverallIterations: 35, TraceHistogramMax: 5, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 11.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 30 mSolverCounterUnknown, 7710 SdHoareTripleChecker+Valid, 4.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 7709 mSDsluCounter, 6567 SdHoareTripleChecker+Invalid, 4.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 62 IncrementalHoareTripleChecker+Unchecked, 4954 mSDsCounter, 963 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 6576 IncrementalHoareTripleChecker+Invalid, 7631 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 963 mSolverCounterUnsat, 1613 mSDtfsCounter, 6576 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2970 GetRequests, 1965 SyntacticMatches, 79 SemanticMatches, 926 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 12904 ImplicationChecksByTransitivity, 98.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=430occurred in iteration=22, InterpolantAutomatonStates: 327, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 34 MinimizatonAttempts, 1441 StatesRemovedByMinimization, 34 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 1.0s SatisfiabilityAnalysisTime, 14.0s InterpolantComputationTime, 2244 NumberOfCodeBlocks, 2244 NumberOfCodeBlocksAsserted, 61 NumberOfCheckSat, 2636 ConstructedInterpolants, 149 QuantifiedInterpolants, 24877 SizeOfPredicates, 105 NumberOfNonLiveVariables, 6937 ConjunctsInSsa, 471 ConjunctsInUnsatCore, 73 InterpolantComputations, 12 PerfectInterpolantSequences, 917/1594 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: OVERALL_TIME: 2.6s, ICFG_INTERPRETER_ENTERED_PROCEDURES: 6, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 58, DAG_INTERPRETER_EARLY_EXITS: 0, TOOLS_POST_APPLICATIONS: 141, TOOLS_POST_TIME: 1.9s, TOOLS_POST_CALL_APPLICATIONS: 9, TOOLS_POST_CALL_TIME: 0.2s, TOOLS_POST_RETURN_APPLICATIONS: 4, TOOLS_POST_RETURN_TIME: 0.2s, TOOLS_QUANTIFIERELIM_APPLICATIONS: 154, TOOLS_QUANTIFIERELIM_TIME: 2.3s, TOOLS_QUANTIFIERELIM_MAX_TIME: 0.2s, FLUID_QUERY_TIME: 0.0s, FLUID_QUERIES: 236, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 10, DOMAIN_JOIN_TIME: 0.1s, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME: 0.0s, DOMAIN_WIDEN_APPLICATIONS: 3, DOMAIN_WIDEN_TIME: 0.0s, DOMAIN_ISSUBSETEQ_APPLICATIONS: 6, DOMAIN_ISSUBSETEQ_TIME: 0.0s, DOMAIN_ISBOTTOM_APPLICATIONS: 58, DOMAIN_ISBOTTOM_TIME: 0.1s, LOOP_SUMMARIZER_APPLICATIONS: 3, LOOP_SUMMARIZER_CACHE_MISSES: 3, LOOP_SUMMARIZER_OVERALL_TIME: 0.7s, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME: 0.7s, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 6, CALL_SUMMARIZER_APPLICATIONS: 4, CALL_SUMMARIZER_CACHE_MISSES: 2, CALL_SUMMARIZER_OVERALL_TIME: 0.3s, CALL_SUMMARIZER_NEW_COMPUTATION_TIME: 0.3s, PROCEDURE_GRAPH_BUILDER_TIME: 0.0s, PATH_EXPR_TIME: 0.0s, REGEX_TO_DAG_TIME: 0.0s, DAG_COMPRESSION_TIME: 0.0s, DAG_COMPRESSION_PROCESSED_NODES: 692, DAG_COMPRESSION_RETAINED_NODES: 172, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2022-12-14 11:48:39,359 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/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 Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### 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_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/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_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-bftpd/bftpd_2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/config/svcomp-MemCleanup-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/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-memcleanup) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 7c883b81b24ce5a721aa9a1ff13aef8a0d532ba87d9e130e470a0b88a1f8e93e --- 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 11:48:40,840 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 11:48:40,841 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 11:48:40,854 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 11:48:40,855 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 11:48:40,855 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 11:48:40,856 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 11:48:40,857 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 11:48:40,858 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 11:48:40,859 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 11:48:40,860 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 11:48:40,860 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 11:48:40,861 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 11:48:40,861 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 11:48:40,862 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 11:48:40,863 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 11:48:40,863 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 11:48:40,864 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 11:48:40,865 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 11:48:40,866 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 11:48:40,867 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 11:48:40,868 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 11:48:40,869 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 11:48:40,870 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 11:48:40,874 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 11:48:40,875 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 11:48:40,875 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 11:48:40,876 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 11:48:40,876 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 11:48:40,877 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 11:48:40,878 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 11:48:40,879 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 11:48:40,880 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 11:48:40,880 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 11:48:40,892 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 11:48:40,892 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 11:48:40,893 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 11:48:40,893 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 11:48:40,893 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 11:48:40,894 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 11:48:40,895 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 11:48:40,896 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/config/svcomp-MemCleanup-32bit-Taipan_Bitvector.epf [2022-12-14 11:48:40,922 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 11:48:40,923 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 11:48:40,923 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 11:48:40,923 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 11:48:40,924 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 11:48:40,924 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 11:48:40,924 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 11:48:40,924 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 11:48:40,925 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 11:48:40,925 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 11:48:40,925 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 11:48:40,925 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 11:48:40,926 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-14 11:48:40,926 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-14 11:48:40,926 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 11:48:40,926 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 11:48:40,926 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-14 11:48:40,927 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 11:48:40,927 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 11:48:40,927 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 11:48:40,927 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-14 11:48:40,927 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-14 11:48:40,927 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 11:48:40,928 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-14 11:48:40,928 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-12-14 11:48:40,928 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-12-14 11:48:40,928 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 11:48:40,928 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 11:48:40,929 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 11:48:40,929 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-14 11:48:40,929 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 11:48:40,929 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 11:48:40,929 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 11:48:40,929 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 11:48:40,929 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-12-14 11:48:40,930 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-12-14 11:48:40,930 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 11:48:40,930 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-14 11:48:40,930 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_dc033242-ed9f-4625-b471-5c7de210d0c4/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-memcleanup) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7c883b81b24ce5a721aa9a1ff13aef8a0d532ba87d9e130e470a0b88a1f8e93e [2022-12-14 11:48:41,150 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 11:48:41,168 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 11:48:41,170 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 11:48:41,170 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 11:48:41,171 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 11:48:41,172 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/memsafety-bftpd/bftpd_2.i [2022-12-14 11:48:43,766 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 11:48:43,946 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 11:48:43,947 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/sv-benchmarks/c/memsafety-bftpd/bftpd_2.i [2022-12-14 11:48:43,956 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/data/548af0d45/ef34918e83c44c7e817c335942e093c6/FLAG5cbfc10df [2022-12-14 11:48:43,970 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/data/548af0d45/ef34918e83c44c7e817c335942e093c6 [2022-12-14 11:48:43,973 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 11:48:43,974 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 11:48:43,976 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 11:48:43,976 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 11:48:43,979 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 11:48:43,980 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 11:48:43" (1/1) ... [2022-12-14 11:48:43,981 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@40b26f2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:48:43, skipping insertion in model container [2022-12-14 11:48:43,981 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 11:48:43" (1/1) ... [2022-12-14 11:48:43,988 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 11:48:44,020 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 11:48:44,241 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 11:48:44,252 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 11:48:44,284 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 11:48:44,311 INFO L208 MainTranslator]: Completed translation [2022-12-14 11:48:44,311 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:48:44 WrapperNode [2022-12-14 11:48:44,311 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 11:48:44,312 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 11:48:44,312 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 11:48:44,313 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 11:48:44,318 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:48:44" (1/1) ... [2022-12-14 11:48:44,331 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:48:44" (1/1) ... [2022-12-14 11:48:44,357 INFO L138 Inliner]: procedures = 169, calls = 42, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 96 [2022-12-14 11:48:44,357 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 11:48:44,358 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 11:48:44,358 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 11:48:44,358 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 11:48:44,374 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:48:44" (1/1) ... [2022-12-14 11:48:44,374 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:48:44" (1/1) ... [2022-12-14 11:48:44,378 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:48:44" (1/1) ... [2022-12-14 11:48:44,378 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:48:44" (1/1) ... [2022-12-14 11:48:44,383 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:48:44" (1/1) ... [2022-12-14 11:48:44,386 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:48:44" (1/1) ... [2022-12-14 11:48:44,387 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:48:44" (1/1) ... [2022-12-14 11:48:44,388 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:48:44" (1/1) ... [2022-12-14 11:48:44,390 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 11:48:44,391 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 11:48:44,391 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 11:48:44,391 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 11:48:44,392 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:48:44" (1/1) ... [2022-12-14 11:48:44,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 11:48:44,406 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:48:44,415 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 11:48:44,417 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 11:48:44,448 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2022-12-14 11:48:44,448 INFO L130 BoogieDeclarations]: Found specification of procedure parse_input [2022-12-14 11:48:44,448 INFO L138 BoogieDeclarations]: Found implementation of procedure parse_input [2022-12-14 11:48:44,448 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-14 11:48:44,448 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 11:48:44,449 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-12-14 11:48:44,449 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 11:48:44,449 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-12-14 11:48:44,449 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-12-14 11:48:44,449 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 11:48:44,449 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 11:48:44,557 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 11:48:44,560 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 11:48:44,811 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 11:48:44,817 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 11:48:44,817 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-12-14 11:48:44,819 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 11:48:44 BoogieIcfgContainer [2022-12-14 11:48:44,819 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 11:48:44,822 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 11:48:44,822 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 11:48:44,825 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 11:48:44,825 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 11:48:43" (1/3) ... [2022-12-14 11:48:44,826 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@96c5a2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 11:48:44, skipping insertion in model container [2022-12-14 11:48:44,826 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:48:44" (2/3) ... [2022-12-14 11:48:44,826 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@96c5a2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 11:48:44, skipping insertion in model container [2022-12-14 11:48:44,826 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 11:48:44" (3/3) ... [2022-12-14 11:48:44,828 INFO L112 eAbstractionObserver]: Analyzing ICFG bftpd_2.i [2022-12-14 11:48:44,846 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 11:48:44,846 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 20 error locations. [2022-12-14 11:48:44,885 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 11:48:44,890 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;@5d0e0956, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 11:48:44,890 INFO L358 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2022-12-14 11:48:44,893 INFO L276 IsEmpty]: Start isEmpty. Operand has 61 states, 36 states have (on average 1.7777777777777777) internal successors, (64), 56 states have internal predecessors, (64), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-14 11:48:44,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 11:48:44,898 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:48:44,899 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-14 11:48:44,899 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-14 11:48:44,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:48:44,903 INFO L85 PathProgramCache]: Analyzing trace with hash -772449407, now seen corresponding path program 1 times [2022-12-14 11:48:44,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:48:44,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1999696881] [2022-12-14 11:48:44,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:48:44,913 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 11:48:44,914 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:48:44,915 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 11:48:44,916 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-12-14 11:48:45,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:48:45,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 11:48:45,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:48:45,113 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 11:48:45,113 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:48:45,114 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:48:45,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1999696881] [2022-12-14 11:48:45,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1999696881] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:48:45,115 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:48:45,115 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 11:48:45,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183917914] [2022-12-14 11:48:45,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:48:45,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 11:48:45,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:48:45,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 11:48:45,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 11:48:45,150 INFO L87 Difference]: Start difference. First operand has 61 states, 36 states have (on average 1.7777777777777777) internal successors, (64), 56 states have internal predecessors, (64), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:48:45,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:48:45,290 INFO L93 Difference]: Finished difference Result 110 states and 128 transitions. [2022-12-14 11:48:45,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 11:48:45,293 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-12-14 11:48:45,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:48:45,300 INFO L225 Difference]: With dead ends: 110 [2022-12-14 11:48:45,300 INFO L226 Difference]: Without dead ends: 106 [2022-12-14 11:48:45,302 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 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 11:48:45,305 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 52 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 11:48:45,306 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 101 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 11:48:45,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-12-14 11:48:45,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 84. [2022-12-14 11:48:45,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 57 states have (on average 1.7017543859649122) internal successors, (97), 76 states have internal predecessors, (97), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-12-14 11:48:45,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 110 transitions. [2022-12-14 11:48:45,342 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 110 transitions. Word has length 6 [2022-12-14 11:48:45,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:48:45,343 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 110 transitions. [2022-12-14 11:48:45,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:48:45,343 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 110 transitions. [2022-12-14 11:48:45,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 11:48:45,344 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:48:45,344 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-14 11:48:45,356 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-12-14 11:48:45,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 11:48:45,545 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-14 11:48:45,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:48:45,546 INFO L85 PathProgramCache]: Analyzing trace with hash -772449406, now seen corresponding path program 1 times [2022-12-14 11:48:45,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:48:45,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [696932544] [2022-12-14 11:48:45,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:48:45,547 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 11:48:45,547 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:48:45,548 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 11:48:45,549 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-12-14 11:48:45,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:48:45,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-14 11:48:45,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:48:45,681 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 11:48:45,681 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:48:45,682 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:48:45,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [696932544] [2022-12-14 11:48:45,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [696932544] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:48:45,682 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:48:45,682 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 11:48:45,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689673393] [2022-12-14 11:48:45,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:48:45,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 11:48:45,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:48:45,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 11:48:45,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 11:48:45,685 INFO L87 Difference]: Start difference. First operand 84 states and 110 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:48:45,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:48:45,876 INFO L93 Difference]: Finished difference Result 206 states and 278 transitions. [2022-12-14 11:48:45,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 11:48:45,876 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-12-14 11:48:45,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:48:45,879 INFO L225 Difference]: With dead ends: 206 [2022-12-14 11:48:45,879 INFO L226 Difference]: Without dead ends: 206 [2022-12-14 11:48:45,879 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 11:48:45,880 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 124 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 11:48:45,881 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 142 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 11:48:45,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-12-14 11:48:45,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 152. [2022-12-14 11:48:45,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 119 states have (on average 1.7394957983193278) internal successors, (207), 138 states have internal predecessors, (207), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (22), 9 states have call predecessors, (22), 9 states have call successors, (22) [2022-12-14 11:48:45,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 238 transitions. [2022-12-14 11:48:45,900 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 238 transitions. Word has length 6 [2022-12-14 11:48:45,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:48:45,901 INFO L495 AbstractCegarLoop]: Abstraction has 152 states and 238 transitions. [2022-12-14 11:48:45,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:48:45,901 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 238 transitions. [2022-12-14 11:48:45,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-14 11:48:45,902 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:48:45,902 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:48:45,909 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Ended with exit code 0 [2022-12-14 11:48:46,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 11:48:46,104 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-14 11:48:46,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:48:46,106 INFO L85 PathProgramCache]: Analyzing trace with hash 1823872140, now seen corresponding path program 1 times [2022-12-14 11:48:46,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:48:46,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1498075693] [2022-12-14 11:48:46,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:48:46,108 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 11:48:46,109 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:48:46,111 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 11:48:46,114 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-12-14 11:48:46,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:48:46,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 11:48:46,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:48:46,355 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 11:48:46,368 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 11:48:46,368 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:48:46,368 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:48:46,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1498075693] [2022-12-14 11:48:46,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1498075693] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:48:46,369 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:48:46,369 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 11:48:46,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442741598] [2022-12-14 11:48:46,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:48:46,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 11:48:46,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:48:46,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 11:48:46,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 11:48:46,370 INFO L87 Difference]: Start difference. First operand 152 states and 238 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:48:46,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:48:46,614 INFO L93 Difference]: Finished difference Result 228 states and 325 transitions. [2022-12-14 11:48:46,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 11:48:46,615 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-12-14 11:48:46,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:48:46,617 INFO L225 Difference]: With dead ends: 228 [2022-12-14 11:48:46,617 INFO L226 Difference]: Without dead ends: 228 [2022-12-14 11:48:46,617 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-12-14 11:48:46,618 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 135 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 11:48:46,619 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 164 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 11:48:46,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2022-12-14 11:48:46,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 155. [2022-12-14 11:48:46,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 122 states have (on average 1.721311475409836) internal successors, (210), 141 states have internal predecessors, (210), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (22), 9 states have call predecessors, (22), 9 states have call successors, (22) [2022-12-14 11:48:46,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 241 transitions. [2022-12-14 11:48:46,635 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 241 transitions. Word has length 7 [2022-12-14 11:48:46,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:48:46,635 INFO L495 AbstractCegarLoop]: Abstraction has 155 states and 241 transitions. [2022-12-14 11:48:46,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:48:46,636 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 241 transitions. [2022-12-14 11:48:46,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-12-14 11:48:46,636 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:48:46,636 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:48:46,643 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-12-14 11:48:46,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 11:48:46,838 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-14 11:48:46,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:48:46,841 INFO L85 PathProgramCache]: Analyzing trace with hash 705461537, now seen corresponding path program 1 times [2022-12-14 11:48:46,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:48:46,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1221064166] [2022-12-14 11:48:46,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:48:46,844 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 11:48:46,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:48:46,847 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 11:48:46,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-12-14 11:48:47,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:48:47,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 11:48:47,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:48:47,115 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 11:48:47,119 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 11:48:47,140 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 11:48:47,140 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:48:47,140 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:48:47,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1221064166] [2022-12-14 11:48:47,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1221064166] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:48:47,141 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:48:47,141 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 11:48:47,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144317906] [2022-12-14 11:48:47,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:48:47,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 11:48:47,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:48:47,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 11:48:47,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 11:48:47,142 INFO L87 Difference]: Start difference. First operand 155 states and 241 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:48:47,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:48:47,332 INFO L93 Difference]: Finished difference Result 208 states and 279 transitions. [2022-12-14 11:48:47,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 11:48:47,333 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-12-14 11:48:47,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:48:47,334 INFO L225 Difference]: With dead ends: 208 [2022-12-14 11:48:47,334 INFO L226 Difference]: Without dead ends: 208 [2022-12-14 11:48:47,335 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-12-14 11:48:47,335 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 127 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 11:48:47,336 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 190 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 11:48:47,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2022-12-14 11:48:47,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 155. [2022-12-14 11:48:47,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 122 states have (on average 1.7049180327868851) internal successors, (208), 141 states have internal predecessors, (208), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (22), 9 states have call predecessors, (22), 9 states have call successors, (22) [2022-12-14 11:48:47,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 239 transitions. [2022-12-14 11:48:47,348 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 239 transitions. Word has length 8 [2022-12-14 11:48:47,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:48:47,348 INFO L495 AbstractCegarLoop]: Abstraction has 155 states and 239 transitions. [2022-12-14 11:48:47,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:48:47,353 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 239 transitions. [2022-12-14 11:48:47,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-12-14 11:48:47,353 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:48:47,354 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:48:47,361 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Ended with exit code 0 [2022-12-14 11:48:47,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 11:48:47,556 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-14 11:48:47,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:48:47,558 INFO L85 PathProgramCache]: Analyzing trace with hash 394471214, now seen corresponding path program 1 times [2022-12-14 11:48:47,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:48:47,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1942193409] [2022-12-14 11:48:47,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:48:47,560 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 11:48:47,560 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:48:47,563 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 11:48:47,566 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-12-14 11:48:47,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:48:47,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 11:48:47,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:48:47,771 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 11:48:47,771 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:48:47,771 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:48:47,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1942193409] [2022-12-14 11:48:47,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1942193409] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:48:47,772 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:48:47,772 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 11:48:47,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215711323] [2022-12-14 11:48:47,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:48:47,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 11:48:47,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:48:47,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 11:48:47,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 11:48:47,773 INFO L87 Difference]: Start difference. First operand 155 states and 239 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:48:47,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:48:47,888 INFO L93 Difference]: Finished difference Result 234 states and 321 transitions. [2022-12-14 11:48:47,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 11:48:47,888 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-12-14 11:48:47,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:48:47,889 INFO L225 Difference]: With dead ends: 234 [2022-12-14 11:48:47,889 INFO L226 Difference]: Without dead ends: 234 [2022-12-14 11:48:47,890 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-12-14 11:48:47,891 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 134 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 11:48:47,891 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 183 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 11:48:47,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2022-12-14 11:48:47,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 191. [2022-12-14 11:48:47,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 156 states have (on average 1.6538461538461537) internal successors, (258), 176 states have internal predecessors, (258), 9 states have call successors, (9), 5 states have call predecessors, (9), 6 states have return successors, (22), 9 states have call predecessors, (22), 9 states have call successors, (22) [2022-12-14 11:48:47,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 289 transitions. [2022-12-14 11:48:47,902 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 289 transitions. Word has length 9 [2022-12-14 11:48:47,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:48:47,903 INFO L495 AbstractCegarLoop]: Abstraction has 191 states and 289 transitions. [2022-12-14 11:48:47,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:48:47,903 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 289 transitions. [2022-12-14 11:48:47,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-12-14 11:48:47,903 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:48:47,903 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:48:47,911 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-12-14 11:48:48,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 11:48:48,105 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting parse_inputErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-14 11:48:48,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:48:48,106 INFO L85 PathProgramCache]: Analyzing trace with hash -656294205, now seen corresponding path program 1 times [2022-12-14 11:48:48,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:48:48,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [221604229] [2022-12-14 11:48:48,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:48:48,107 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 11:48:48,108 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:48:48,110 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 11:48:48,112 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-12-14 11:48:48,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:48:48,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 11:48:48,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:48:48,277 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 11:48:48,277 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:48:48,277 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:48:48,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [221604229] [2022-12-14 11:48:48,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [221604229] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:48:48,277 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:48:48,278 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 11:48:48,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096164215] [2022-12-14 11:48:48,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:48:48,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 11:48:48,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:48:48,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 11:48:48,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 11:48:48,279 INFO L87 Difference]: Start difference. First operand 191 states and 289 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:48:48,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:48:48,425 INFO L93 Difference]: Finished difference Result 231 states and 304 transitions. [2022-12-14 11:48:48,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 11:48:48,426 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-12-14 11:48:48,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:48:48,427 INFO L225 Difference]: With dead ends: 231 [2022-12-14 11:48:48,427 INFO L226 Difference]: Without dead ends: 231 [2022-12-14 11:48:48,427 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-12-14 11:48:48,428 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 122 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 11:48:48,428 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 227 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 11:48:48,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2022-12-14 11:48:48,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 201. [2022-12-14 11:48:48,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 165 states have (on average 1.6424242424242423) internal successors, (271), 186 states have internal predecessors, (271), 9 states have call successors, (9), 5 states have call predecessors, (9), 7 states have return successors, (22), 9 states have call predecessors, (22), 9 states have call successors, (22) [2022-12-14 11:48:48,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 302 transitions. [2022-12-14 11:48:48,438 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 302 transitions. Word has length 10 [2022-12-14 11:48:48,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:48:48,438 INFO L495 AbstractCegarLoop]: Abstraction has 201 states and 302 transitions. [2022-12-14 11:48:48,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:48:48,438 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 302 transitions. [2022-12-14 11:48:48,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-12-14 11:48:48,438 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:48:48,439 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:48:48,449 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Ended with exit code 0 [2022-12-14 11:48:48,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 11:48:48,640 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-14 11:48:48,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:48:48,642 INFO L85 PathProgramCache]: Analyzing trace with hash 12795785, now seen corresponding path program 1 times [2022-12-14 11:48:48,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:48:48,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1618948937] [2022-12-14 11:48:48,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:48:48,643 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 11:48:48,644 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:48:48,646 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 11:48:48,649 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-12-14 11:48:48,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:48:48,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 11:48:48,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:48:48,849 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 11:48:48,849 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:48:49,144 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 11:48:49,144 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:48:49,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1618948937] [2022-12-14 11:48:49,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1618948937] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:48:49,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [42141506] [2022-12-14 11:48:49,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:48:49,145 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 11:48:49,145 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 11:48:49,146 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 11:48:49,147 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2022-12-14 11:48:49,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:48:49,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 11:48:49,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:48:49,324 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 11:48:49,324 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:48:49,476 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 11:48:49,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [42141506] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:48:49,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646885834] [2022-12-14 11:48:49,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:48:49,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:48:49,477 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:48:49,478 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:48:49,479 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 11:48:49,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:48:49,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 11:48:49,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:48:49,617 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 11:48:49,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:48:49,751 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 11:48:49,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [646885834] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:48:49,752 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 11:48:49,752 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3, 3, 3, 3] total 6 [2022-12-14 11:48:49,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145033285] [2022-12-14 11:48:49,752 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 11:48:49,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 11:48:49,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:48:49,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 11:48:49,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-12-14 11:48:49,753 INFO L87 Difference]: Start difference. First operand 201 states and 302 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:48:50,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:48:50,133 INFO L93 Difference]: Finished difference Result 367 states and 495 transitions. [2022-12-14 11:48:50,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 11:48:50,134 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (2), 2 states have call predecessors, (2), 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 11:48:50,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:48:50,135 INFO L225 Difference]: With dead ends: 367 [2022-12-14 11:48:50,135 INFO L226 Difference]: Without dead ends: 367 [2022-12-14 11:48:50,136 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-12-14 11:48:50,136 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 245 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 11:48:50,137 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [245 Valid, 312 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 11:48:50,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2022-12-14 11:48:50,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 239. [2022-12-14 11:48:50,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 200 states have (on average 1.62) internal successors, (324), 224 states have internal predecessors, (324), 9 states have call successors, (9), 5 states have call predecessors, (9), 10 states have return successors, (30), 9 states have call predecessors, (30), 9 states have call successors, (30) [2022-12-14 11:48:50,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 363 transitions. [2022-12-14 11:48:50,148 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 363 transitions. Word has length 14 [2022-12-14 11:48:50,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:48:50,149 INFO L495 AbstractCegarLoop]: Abstraction has 239 states and 363 transitions. [2022-12-14 11:48:50,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:48:50,149 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 363 transitions. [2022-12-14 11:48:50,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-12-14 11:48:50,149 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:48:50,149 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:48:50,157 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Ended with exit code 0 [2022-12-14 11:48:50,356 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (9)] Ended with exit code 0 [2022-12-14 11:48:50,559 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-14 11:48:50,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:48:50,753 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-14 11:48:50,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:48:50,755 INFO L85 PathProgramCache]: Analyzing trace with hash 396669285, now seen corresponding path program 1 times [2022-12-14 11:48:50,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:48:50,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1324984787] [2022-12-14 11:48:50,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:48:50,756 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 11:48:50,757 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:48:50,759 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 11:48:50,762 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-12-14 11:48:50,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:48:50,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 11:48:50,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:48:50,946 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 11:48:50,956 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:48:50,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:48:51,085 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:48:51,085 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:48:51,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1324984787] [2022-12-14 11:48:51,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1324984787] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:48:51,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1757875703] [2022-12-14 11:48:51,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:48:51,086 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 11:48:51,086 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 11:48:51,086 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 11:48:51,087 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2022-12-14 11:48:51,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:48:51,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 11:48:51,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:48:51,336 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 11:48:51,351 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:48:51,351 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:48:51,410 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:48:51,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1757875703] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:48:51,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844984081] [2022-12-14 11:48:51,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:48:51,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:48:51,411 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:48:51,412 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:48:51,412 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-14 11:48:51,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:48:51,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 11:48:51,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:48:51,718 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 11:48:51,723 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:48:51,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:48:52,023 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:48:52,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844984081] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:48:52,024 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 11:48:52,024 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 18 [2022-12-14 11:48:52,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183078981] [2022-12-14 11:48:52,024 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 11:48:52,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-14 11:48:52,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:48:52,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-14 11:48:52,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2022-12-14 11:48:52,025 INFO L87 Difference]: Start difference. First operand 239 states and 363 transitions. Second operand has 20 states, 19 states have (on average 3.5789473684210527) internal successors, (68), 19 states have internal predecessors, (68), 5 states have call successors, (5), 5 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:48:53,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:48:53,444 INFO L93 Difference]: Finished difference Result 601 states and 793 transitions. [2022-12-14 11:48:53,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-12-14 11:48:53,444 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 3.5789473684210527) internal successors, (68), 19 states have internal predecessors, (68), 5 states have call successors, (5), 5 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-12-14 11:48:53,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:48:53,448 INFO L225 Difference]: With dead ends: 601 [2022-12-14 11:48:53,448 INFO L226 Difference]: Without dead ends: 601 [2022-12-14 11:48:53,448 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=351, Invalid=1131, Unknown=0, NotChecked=0, Total=1482 [2022-12-14 11:48:53,449 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 1299 mSDsluCounter, 418 mSDsCounter, 0 mSdLazyCounter, 512 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1299 SdHoareTripleChecker+Valid, 506 SdHoareTripleChecker+Invalid, 648 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-12-14 11:48:53,449 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1299 Valid, 506 Invalid, 648 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 512 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-12-14 11:48:53,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 601 states. [2022-12-14 11:48:53,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 601 to 307. [2022-12-14 11:48:53,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 267 states have (on average 1.6254681647940075) internal successors, (434), 292 states have internal predecessors, (434), 9 states have call successors, (9), 5 states have call predecessors, (9), 11 states have return successors, (32), 9 states have call predecessors, (32), 9 states have call successors, (32) [2022-12-14 11:48:53,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 475 transitions. [2022-12-14 11:48:53,458 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 475 transitions. Word has length 15 [2022-12-14 11:48:53,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:48:53,458 INFO L495 AbstractCegarLoop]: Abstraction has 307 states and 475 transitions. [2022-12-14 11:48:53,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 3.5789473684210527) internal successors, (68), 19 states have internal predecessors, (68), 5 states have call successors, (5), 5 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:48:53,459 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 475 transitions. [2022-12-14 11:48:53,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-12-14 11:48:53,459 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:48:53,459 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:48:53,461 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (12)] Ended with exit code 0 [2022-12-14 11:48:53,667 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-12-14 11:48:53,868 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-12-14 11:48:54,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:48:54,062 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-14 11:48:54,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:48:54,063 INFO L85 PathProgramCache]: Analyzing trace with hash -588154008, now seen corresponding path program 1 times [2022-12-14 11:48:54,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:48:54,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [806957450] [2022-12-14 11:48:54,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:48:54,064 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 11:48:54,064 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:48:54,065 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 11:48:54,066 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-12-14 11:48:54,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:48:54,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 11:48:54,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:48:54,275 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 11:48:54,278 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 11:48:54,290 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:48:54,291 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:48:54,419 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:48:54,419 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:48:54,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [806957450] [2022-12-14 11:48:54,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [806957450] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:48:54,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [322399984] [2022-12-14 11:48:54,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:48:54,419 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 11:48:54,419 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 11:48:54,420 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 11:48:54,421 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2022-12-14 11:48:54,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:48:54,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 11:48:54,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:48:54,636 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 11:48:54,641 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 11:48:54,646 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:48:54,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:48:54,710 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:48:54,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [322399984] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:48:54,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098156705] [2022-12-14 11:48:54,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:48:54,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:48:54,711 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:48:54,712 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:48:54,713 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-14 11:48:54,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:48:54,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 11:48:54,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:48:55,055 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 11:48:55,060 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 11:48:55,102 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:48:55,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:48:55,413 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:48:55,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098156705] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:48:55,413 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 11:48:55,413 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 15 [2022-12-14 11:48:55,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365216998] [2022-12-14 11:48:55,413 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 11:48:55,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-14 11:48:55,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:48:55,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-14 11:48:55,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2022-12-14 11:48:55,414 INFO L87 Difference]: Start difference. First operand 307 states and 475 transitions. Second operand has 17 states, 16 states have (on average 3.625) internal successors, (58), 16 states have internal predecessors, (58), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:48:57,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:48:57,365 INFO L93 Difference]: Finished difference Result 830 states and 1133 transitions. [2022-12-14 11:48:57,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-14 11:48:57,366 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.625) internal successors, (58), 16 states have internal predecessors, (58), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-12-14 11:48:57,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:48:57,368 INFO L225 Difference]: With dead ends: 830 [2022-12-14 11:48:57,368 INFO L226 Difference]: Without dead ends: 830 [2022-12-14 11:48:57,368 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=242, Invalid=750, Unknown=0, NotChecked=0, Total=992 [2022-12-14 11:48:57,368 INFO L413 NwaCegarLoop]: 105 mSDtfsCounter, 1131 mSDsluCounter, 523 mSDsCounter, 0 mSdLazyCounter, 437 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1131 SdHoareTripleChecker+Valid, 628 SdHoareTripleChecker+Invalid, 509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-12-14 11:48:57,369 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1131 Valid, 628 Invalid, 509 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 437 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-12-14 11:48:57,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 830 states. [2022-12-14 11:48:57,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 830 to 422. [2022-12-14 11:48:57,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 422 states, 375 states have (on average 1.6426666666666667) internal successors, (616), 403 states have internal predecessors, (616), 11 states have call successors, (11), 7 states have call predecessors, (11), 16 states have return successors, (48), 11 states have call predecessors, (48), 11 states have call successors, (48) [2022-12-14 11:48:57,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 675 transitions. [2022-12-14 11:48:57,381 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 675 transitions. Word has length 16 [2022-12-14 11:48:57,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:48:57,381 INFO L495 AbstractCegarLoop]: Abstraction has 422 states and 675 transitions. [2022-12-14 11:48:57,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 3.625) internal successors, (58), 16 states have internal predecessors, (58), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:48:57,381 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 675 transitions. [2022-12-14 11:48:57,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-12-14 11:48:57,382 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:48:57,382 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:48:57,384 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (15)] Ended with exit code 0 [2022-12-14 11:48:57,610 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Ended with exit code 0 [2022-12-14 11:48:57,797 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-12-14 11:48:57,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:48:57,984 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting parse_inputErr10ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-14 11:48:57,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:48:57,986 INFO L85 PathProgramCache]: Analyzing trace with hash -1776199670, now seen corresponding path program 1 times [2022-12-14 11:48:57,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:48:57,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1406958233] [2022-12-14 11:48:57,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:48:57,987 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 11:48:57,987 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:48:57,988 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 11:48:57,989 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-12-14 11:48:58,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:48:58,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-14 11:48:58,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:48:58,108 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 11:48:58,108 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:48:58,108 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:48:58,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1406958233] [2022-12-14 11:48:58,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1406958233] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:48:58,108 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:48:58,108 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 11:48:58,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364730378] [2022-12-14 11:48:58,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:48:58,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 11:48:58,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:48:58,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 11:48:58,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 11:48:58,109 INFO L87 Difference]: Start difference. First operand 422 states and 675 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:48:58,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:48:58,139 INFO L93 Difference]: Finished difference Result 420 states and 622 transitions. [2022-12-14 11:48:58,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 11:48:58,139 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-12-14 11:48:58,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:48:58,141 INFO L225 Difference]: With dead ends: 420 [2022-12-14 11:48:58,141 INFO L226 Difference]: Without dead ends: 420 [2022-12-14 11:48:58,141 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 16 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 11:48:58,141 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 27 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 11:48:58,142 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 118 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 11:48:58,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2022-12-14 11:48:58,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 397. [2022-12-14 11:48:58,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397 states, 350 states have (on average 1.5742857142857143) internal successors, (551), 377 states have internal predecessors, (551), 11 states have call successors, (11), 8 states have call predecessors, (11), 16 states have return successors, (41), 11 states have call predecessors, (41), 11 states have call successors, (41) [2022-12-14 11:48:58,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 603 transitions. [2022-12-14 11:48:58,149 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 603 transitions. Word has length 18 [2022-12-14 11:48:58,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:48:58,149 INFO L495 AbstractCegarLoop]: Abstraction has 397 states and 603 transitions. [2022-12-14 11:48:58,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:48:58,149 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 603 transitions. [2022-12-14 11:48:58,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-12-14 11:48:58,149 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:48:58,150 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2022-12-14 11:48:58,161 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-12-14 11:48:58,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 11:48:58,351 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-14 11:48:58,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:48:58,352 INFO L85 PathProgramCache]: Analyzing trace with hash 323759248, now seen corresponding path program 2 times [2022-12-14 11:48:58,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:48:58,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [707802669] [2022-12-14 11:48:58,354 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 11:48:58,354 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 11:48:58,355 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:48:58,357 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 11:48:58,360 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-12-14 11:48:58,450 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 11:48:58,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:48:58,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 11:48:58,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:48:58,603 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:48:58,603 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:48:59,140 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:48:59,140 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:48:59,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [707802669] [2022-12-14 11:48:59,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [707802669] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:48:59,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1351434957] [2022-12-14 11:48:59,140 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 11:48:59,141 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 11:48:59,141 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 11:48:59,141 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 11:48:59,142 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2022-12-14 11:48:59,244 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 11:48:59,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:48:59,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 11:48:59,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:48:59,303 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:48:59,303 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:48:59,420 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:48:59,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1351434957] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:48:59,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230772192] [2022-12-14 11:48:59,420 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-14 11:48:59,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:48:59,421 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:48:59,421 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:48:59,423 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-12-14 11:48:59,471 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-14 11:48:59,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 11:48:59,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-14 11:48:59,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:48:59,494 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:48:59,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:48:59,529 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:48:59,529 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230772192] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:48:59,529 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 11:48:59,529 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 16 [2022-12-14 11:48:59,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941951736] [2022-12-14 11:48:59,529 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 11:48:59,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-14 11:48:59,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:48:59,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-14 11:48:59,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2022-12-14 11:48:59,530 INFO L87 Difference]: Start difference. First operand 397 states and 603 transitions. Second operand has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:49:00,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:49:00,143 INFO L93 Difference]: Finished difference Result 495 states and 681 transitions. [2022-12-14 11:49:00,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-14 11:49:00,144 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-12-14 11:49:00,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:49:00,147 INFO L225 Difference]: With dead ends: 495 [2022-12-14 11:49:00,147 INFO L226 Difference]: Without dead ends: 495 [2022-12-14 11:49:00,147 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2022-12-14 11:49:00,148 INFO L413 NwaCegarLoop]: 106 mSDtfsCounter, 475 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 475 SdHoareTripleChecker+Valid, 484 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 11:49:00,148 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [475 Valid, 484 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 11:49:00,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2022-12-14 11:49:00,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 336. [2022-12-14 11:49:00,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 288 states have (on average 1.5104166666666667) internal successors, (435), 316 states have internal predecessors, (435), 11 states have call successors, (11), 8 states have call predecessors, (11), 17 states have return successors, (36), 11 states have call predecessors, (36), 11 states have call successors, (36) [2022-12-14 11:49:00,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 482 transitions. [2022-12-14 11:49:00,156 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 482 transitions. Word has length 22 [2022-12-14 11:49:00,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:49:00,156 INFO L495 AbstractCegarLoop]: Abstraction has 336 states and 482 transitions. [2022-12-14 11:49:00,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 11:49:00,156 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 482 transitions. [2022-12-14 11:49:00,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-12-14 11:49:00,157 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:49:00,157 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:49:00,159 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (19)] Ended with exit code 0 [2022-12-14 11:49:00,372 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-12-14 11:49:00,571 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-12-14 11:49:00,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 11:49:00,760 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-14 11:49:00,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:49:00,761 INFO L85 PathProgramCache]: Analyzing trace with hash 382694474, now seen corresponding path program 1 times [2022-12-14 11:49:00,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:49:00,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2088795385] [2022-12-14 11:49:00,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:49:00,763 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 11:49:00,763 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:49:00,764 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 11:49:00,766 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-12-14 11:49:00,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:49:00,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 11:49:00,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:49:00,828 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:49:00,828 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:49:00,828 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:49:00,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2088795385] [2022-12-14 11:49:00,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2088795385] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:49:00,829 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:49:00,829 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 11:49:00,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629550880] [2022-12-14 11:49:00,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:49:00,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 11:49:00,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:49:00,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 11:49:00,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 11:49:00,830 INFO L87 Difference]: Start difference. First operand 336 states and 482 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 11:49:00,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:49:00,833 INFO L93 Difference]: Finished difference Result 259 states and 362 transitions. [2022-12-14 11:49:00,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 11:49:00,838 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2022-12-14 11:49:00,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:49:00,839 INFO L225 Difference]: With dead ends: 259 [2022-12-14 11:49:00,839 INFO L226 Difference]: Without dead ends: 259 [2022-12-14 11:49:00,839 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 23 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 11:49:00,840 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 13 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 11:49:00,840 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 126 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 11:49:00,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2022-12-14 11:49:00,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 259. [2022-12-14 11:49:00,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 219 states have (on average 1.5068493150684932) internal successors, (330), 244 states have internal predecessors, (330), 8 states have call successors, (8), 6 states have call predecessors, (8), 12 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2022-12-14 11:49:00,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 362 transitions. [2022-12-14 11:49:00,844 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 362 transitions. Word has length 25 [2022-12-14 11:49:00,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:49:00,844 INFO L495 AbstractCegarLoop]: Abstraction has 259 states and 362 transitions. [2022-12-14 11:49:00,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 11:49:00,844 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 362 transitions. [2022-12-14 11:49:00,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-12-14 11:49:00,845 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:49:00,845 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:49:00,856 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Ended with exit code 0 [2022-12-14 11:49:01,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 11:49:01,045 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-14 11:49:01,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:49:01,046 INFO L85 PathProgramCache]: Analyzing trace with hash -1752183410, now seen corresponding path program 1 times [2022-12-14 11:49:01,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:49:01,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1645352725] [2022-12-14 11:49:01,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:49:01,046 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 11:49:01,047 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:49:01,047 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 11:49:01,048 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-12-14 11:49:01,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:49:01,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 11:49:01,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:49:03,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:49:03,328 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-12-14 11:49:03,374 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:49:03,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:49:06,334 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:49:06,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1645352725] [2022-12-14 11:49:06,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1645352725] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:49:06,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2110160435] [2022-12-14 11:49:06,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:49:06,335 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 11:49:06,335 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 11:49:06,336 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 11:49:06,336 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2022-12-14 11:49:06,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:49:06,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 11:49:06,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:49:08,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:49:08,709 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-12-14 11:49:08,738 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:49:08,739 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:49:08,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2110160435] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:49:08,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360055105] [2022-12-14 11:49:08,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:49:08,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:49:08,921 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:49:08,922 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:49:08,923 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-12-14 11:49:08,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:49:08,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 11:49:08,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:49:11,152 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 11:49:11,153 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-14 11:49:11,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:49:11,486 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-12-14 11:49:11,512 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:49:11,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:49:11,630 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-12-14 11:49:11,631 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 14 [2022-12-14 11:49:14,292 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-12-14 11:49:14,292 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 14 [2022-12-14 11:49:16,451 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:49:16,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360055105] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:49:16,451 INFO L184 FreeRefinementEngine]: Found 0 perfect and 4 imperfect interpolant sequences. [2022-12-14 11:49:16,451 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 4] total 12 [2022-12-14 11:49:16,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262185745] [2022-12-14 11:49:16,452 INFO L85 oduleStraightlineAll]: Using 4 imperfect interpolants to construct interpolant automaton [2022-12-14 11:49:16,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-14 11:49:16,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:49:16,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-14 11:49:16,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=151, Unknown=9, NotChecked=0, Total=210 [2022-12-14 11:49:16,453 INFO L87 Difference]: Start difference. First operand 259 states and 362 transitions. Second operand has 14 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 13 states have internal predecessors, (69), 3 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-14 11:49:19,291 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 11:49:23,357 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 11:49:25,383 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 11:49:29,501 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 11:49:31,508 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 11:49:33,517 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 11:49:35,530 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 11:49:39,617 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 11:49:47,754 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 11:49:49,763 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 11:49:57,907 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 11:49:59,913 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 11:50:06,122 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 11:50:08,136 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 11:50:08,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:50:08,400 INFO L93 Difference]: Finished difference Result 397 states and 512 transitions. [2022-12-14 11:50:08,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-12-14 11:50:08,401 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 13 states have internal predecessors, (69), 3 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 27 [2022-12-14 11:50:08,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:50:08,402 INFO L225 Difference]: With dead ends: 397 [2022-12-14 11:50:08,402 INFO L226 Difference]: Without dead ends: 397 [2022-12-14 11:50:08,402 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 97 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 36.7s TimeCoverageRelationStatistics Valid=248, Invalid=545, Unknown=19, NotChecked=0, Total=812 [2022-12-14 11:50:08,403 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 382 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 99 mSolverCounterUnsat, 59 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 28.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 382 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 59 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 28.8s IncrementalHoareTripleChecker+Time [2022-12-14 11:50:08,403 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [382 Valid, 145 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 154 Invalid, 59 Unknown, 0 Unchecked, 28.8s Time] [2022-12-14 11:50:08,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2022-12-14 11:50:08,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 269. [2022-12-14 11:50:08,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 231 states have (on average 1.393939393939394) internal successors, (322), 254 states have internal predecessors, (322), 8 states have call successors, (8), 6 states have call predecessors, (8), 13 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) [2022-12-14 11:50:08,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 356 transitions. [2022-12-14 11:50:08,409 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 356 transitions. Word has length 27 [2022-12-14 11:50:08,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:50:08,409 INFO L495 AbstractCegarLoop]: Abstraction has 269 states and 356 transitions. [2022-12-14 11:50:08,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 13 states have internal predecessors, (69), 3 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-14 11:50:08,409 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 356 transitions. [2022-12-14 11:50:08,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-12-14 11:50:08,409 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:50:08,409 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:50:08,412 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (23)] Forceful destruction successful, exit code 0 [2022-12-14 11:50:08,638 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-12-14 11:50:08,824 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-12-14 11:50:09,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:50:09,012 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-14 11:50:09,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:50:09,013 INFO L85 PathProgramCache]: Analyzing trace with hash 2041807728, now seen corresponding path program 1 times [2022-12-14 11:50:09,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:50:09,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2141145036] [2022-12-14 11:50:09,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:50:09,015 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 11:50:09,015 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:50:09,016 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 11:50:09,017 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-12-14 11:50:09,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:50:09,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 11:50:09,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:50:09,246 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:50:09,246 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:50:09,424 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:50:09,424 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:50:09,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2141145036] [2022-12-14 11:50:09,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2141145036] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:50:09,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [965462149] [2022-12-14 11:50:09,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:50:09,425 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 11:50:09,425 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 11:50:09,425 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 11:50:09,426 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2022-12-14 11:50:09,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:50:09,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 11:50:09,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:50:09,616 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:50:09,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:50:09,763 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:50:09,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [965462149] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:50:09,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451958069] [2022-12-14 11:50:09,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:50:09,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:50:09,764 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:50:09,765 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:50:09,766 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-12-14 11:50:09,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:50:09,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 11:50:09,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:50:09,899 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:50:09,899 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:50:10,048 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:50:10,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1451958069] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:50:10,048 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 11:50:10,048 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 7 [2022-12-14 11:50:10,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660085000] [2022-12-14 11:50:10,049 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 11:50:10,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-14 11:50:10,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:50:10,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-14 11:50:10,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-12-14 11:50:10,050 INFO L87 Difference]: Start difference. First operand 269 states and 356 transitions. Second operand has 9 states, 8 states have (on average 6.0) internal successors, (48), 6 states have internal predecessors, (48), 1 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-14 11:50:10,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:50:10,504 INFO L93 Difference]: Finished difference Result 386 states and 473 transitions. [2022-12-14 11:50:10,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 11:50:10,505 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 6.0) internal successors, (48), 6 states have internal predecessors, (48), 1 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 28 [2022-12-14 11:50:10,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:50:10,506 INFO L225 Difference]: With dead ends: 386 [2022-12-14 11:50:10,506 INFO L226 Difference]: Without dead ends: 386 [2022-12-14 11:50:10,506 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2022-12-14 11:50:10,506 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 256 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 11:50:10,507 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [256 Valid, 277 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 11:50:10,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2022-12-14 11:50:10,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 341. [2022-12-14 11:50:10,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 300 states have (on average 1.35) internal successors, (405), 324 states have internal predecessors, (405), 8 states have call successors, (8), 8 states have call predecessors, (8), 16 states have return successors, (25), 8 states have call predecessors, (25), 8 states have call successors, (25) [2022-12-14 11:50:10,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 438 transitions. [2022-12-14 11:50:10,513 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 438 transitions. Word has length 28 [2022-12-14 11:50:10,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:50:10,513 INFO L495 AbstractCegarLoop]: Abstraction has 341 states and 438 transitions. [2022-12-14 11:50:10,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 6.0) internal successors, (48), 6 states have internal predecessors, (48), 1 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-14 11:50:10,514 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 438 transitions. [2022-12-14 11:50:10,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-12-14 11:50:10,514 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:50:10,515 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:50:10,517 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (26)] Forceful destruction successful, exit code 0 [2022-12-14 11:50:10,743 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2022-12-14 11:50:10,923 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-12-14 11:50:11,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:50:11,117 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting parse_inputErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-14 11:50:11,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:50:11,118 INFO L85 PathProgramCache]: Analyzing trace with hash -1128469823, now seen corresponding path program 1 times [2022-12-14 11:50:11,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:50:11,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [165113444] [2022-12-14 11:50:11,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:50:11,120 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 11:50:11,121 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:50:11,123 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 11:50:11,124 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-12-14 11:50:11,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:50:11,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 11:50:11,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:50:11,363 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:50:11,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:50:11,603 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:50:11,603 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:50:11,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [165113444] [2022-12-14 11:50:11,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [165113444] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:50:11,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [957362906] [2022-12-14 11:50:11,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:50:11,603 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 11:50:11,603 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 11:50:11,604 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 11:50:11,605 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2022-12-14 11:50:11,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:50:11,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 11:50:11,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:50:11,984 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:50:11,984 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:50:11,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [957362906] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:50:11,984 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-14 11:50:11,984 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4, 4] total 13 [2022-12-14 11:50:11,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979364089] [2022-12-14 11:50:11,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:50:11,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 11:50:11,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:50:11,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 11:50:11,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-12-14 11:50:11,985 INFO L87 Difference]: Start difference. First operand 341 states and 438 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 11:50:12,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:50:12,237 INFO L93 Difference]: Finished difference Result 416 states and 519 transitions. [2022-12-14 11:50:12,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 11:50:12,238 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2022-12-14 11:50:12,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:50:12,240 INFO L225 Difference]: With dead ends: 416 [2022-12-14 11:50:12,240 INFO L226 Difference]: Without dead ends: 416 [2022-12-14 11:50:12,240 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2022-12-14 11:50:12,241 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 108 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 11:50:12,241 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 194 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 11:50:12,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2022-12-14 11:50:12,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 354. [2022-12-14 11:50:12,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 313 states have (on average 1.3354632587859425) internal successors, (418), 337 states have internal predecessors, (418), 8 states have call successors, (8), 8 states have call predecessors, (8), 16 states have return successors, (25), 8 states have call predecessors, (25), 8 states have call successors, (25) [2022-12-14 11:50:12,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 451 transitions. [2022-12-14 11:50:12,247 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 451 transitions. Word has length 29 [2022-12-14 11:50:12,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:50:12,248 INFO L495 AbstractCegarLoop]: Abstraction has 354 states and 451 transitions. [2022-12-14 11:50:12,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 11:50:12,248 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 451 transitions. [2022-12-14 11:50:12,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-12-14 11:50:12,248 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:50:12,248 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:50:12,250 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (29)] Forceful destruction successful, exit code 0 [2022-12-14 11:50:12,456 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2022-12-14 11:50:12,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 11:50:12,650 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-14 11:50:12,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:50:12,651 INFO L85 PathProgramCache]: Analyzing trace with hash -221078483, now seen corresponding path program 1 times [2022-12-14 11:50:12,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:50:12,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [996034878] [2022-12-14 11:50:12,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:50:12,653 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 11:50:12,653 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:50:12,655 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 11:50:12,656 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-12-14 11:50:12,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:50:12,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-14 11:50:12,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:50:15,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:50:15,254 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-12-14 11:50:15,397 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 11:50:15,402 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 11:50:15,447 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:50:15,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:50:17,794 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:50:17,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [996034878] [2022-12-14 11:50:17,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [996034878] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:50:17,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1206980292] [2022-12-14 11:50:17,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:50:17,794 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 11:50:17,795 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 11:50:17,795 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 11:50:17,796 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2022-12-14 11:50:17,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:50:17,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-14 11:50:17,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:50:22,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:50:22,451 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-12-14 11:50:22,528 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 11:50:22,532 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 11:50:22,548 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:50:22,548 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:50:24,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1206980292] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:50:24,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651285359] [2022-12-14 11:50:24,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:50:24,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:50:24,776 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:50:24,777 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:50:24,778 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-12-14 11:50:24,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:50:24,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 11:50:24,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:50:27,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:50:27,266 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-12-14 11:50:27,327 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 11:50:27,332 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 11:50:27,347 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:50:27,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:50:29,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651285359] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:50:29,558 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 11:50:29,558 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 7 [2022-12-14 11:50:29,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484676057] [2022-12-14 11:50:29,559 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 11:50:29,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-14 11:50:29,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:50:29,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-14 11:50:29,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=119, Unknown=5, NotChecked=0, Total=156 [2022-12-14 11:50:29,560 INFO L87 Difference]: Start difference. First operand 354 states and 451 transitions. Second operand has 9 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 11:50:36,239 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 11:51:02,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:51:02,923 INFO L93 Difference]: Finished difference Result 415 states and 513 transitions. [2022-12-14 11:51:02,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-12-14 11:51:02,924 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2022-12-14 11:51:02,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:51:02,925 INFO L225 Difference]: With dead ends: 415 [2022-12-14 11:51:02,925 INFO L226 Difference]: Without dead ends: 415 [2022-12-14 11:51:02,925 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 90 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 45.5s TimeCoverageRelationStatistics Valid=197, Invalid=486, Unknown=19, NotChecked=0, Total=702 [2022-12-14 11:51:02,926 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 198 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 28 mSolverCounterUnsat, 16 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 16 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-12-14 11:51:02,926 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [198 Valid, 166 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 174 Invalid, 16 Unknown, 0 Unchecked, 2.5s Time] [2022-12-14 11:51:02,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2022-12-14 11:51:02,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 354. [2022-12-14 11:51:02,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 313 states have (on average 1.3194888178913737) internal successors, (413), 337 states have internal predecessors, (413), 8 states have call successors, (8), 8 states have call predecessors, (8), 16 states have return successors, (25), 8 states have call predecessors, (25), 8 states have call successors, (25) [2022-12-14 11:51:02,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 446 transitions. [2022-12-14 11:51:02,932 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 446 transitions. Word has length 29 [2022-12-14 11:51:02,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:51:02,932 INFO L495 AbstractCegarLoop]: Abstraction has 354 states and 446 transitions. [2022-12-14 11:51:02,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 11:51:02,932 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 446 transitions. [2022-12-14 11:51:02,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-12-14 11:51:02,933 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:51:02,933 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:51:02,940 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-12-14 11:51:03,161 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Ended with exit code 0 [2022-12-14 11:51:03,340 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (31)] Forceful destruction successful, exit code 0 [2022-12-14 11:51:03,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 11:51:03,536 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting parse_inputErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-14 11:51:03,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:51:03,537 INFO L85 PathProgramCache]: Analyzing trace with hash 740687428, now seen corresponding path program 1 times [2022-12-14 11:51:03,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:51:03,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [583135310] [2022-12-14 11:51:03,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:51:03,539 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 11:51:03,539 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:51:03,540 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 11:51:03,541 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2022-12-14 11:51:03,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:51:03,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 11:51:03,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:51:03,841 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 11:51:03,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:51:04,125 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 11:51:04,125 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:51:04,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [583135310] [2022-12-14 11:51:04,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [583135310] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:51:04,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [572163810] [2022-12-14 11:51:04,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:51:04,126 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 11:51:04,126 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 11:51:04,127 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 11:51:04,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (34)] Waiting until timeout for monitored process [2022-12-14 11:51:04,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:51:04,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 11:51:04,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:51:04,379 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 11:51:04,379 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:51:04,595 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 11:51:04,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [572163810] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:51:04,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426135715] [2022-12-14 11:51:04,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:51:04,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:51:04,596 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:51:04,597 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:51:04,598 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-12-14 11:51:04,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:51:04,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 11:51:04,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:51:04,818 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 11:51:04,818 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:51:04,998 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 11:51:04,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426135715] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:51:04,998 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 11:51:04,998 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 8 [2022-12-14 11:51:04,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702697663] [2022-12-14 11:51:04,999 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 11:51:04,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-14 11:51:04,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:51:04,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-14 11:51:04,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-12-14 11:51:04,999 INFO L87 Difference]: Start difference. First operand 354 states and 446 transitions. Second operand has 10 states, 9 states have (on average 4.444444444444445) internal successors, (40), 7 states have internal predecessors, (40), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 11:51:05,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:51:05,678 INFO L93 Difference]: Finished difference Result 381 states and 457 transitions. [2022-12-14 11:51:05,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-14 11:51:05,680 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.444444444444445) internal successors, (40), 7 states have internal predecessors, (40), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 31 [2022-12-14 11:51:05,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:51:05,681 INFO L225 Difference]: With dead ends: 381 [2022-12-14 11:51:05,681 INFO L226 Difference]: Without dead ends: 381 [2022-12-14 11:51:05,681 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2022-12-14 11:51:05,681 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 362 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 362 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 11:51:05,681 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [362 Valid, 283 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 11:51:05,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2022-12-14 11:51:05,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 364. [2022-12-14 11:51:05,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 322 states have (on average 1.3012422360248448) internal successors, (419), 347 states have internal predecessors, (419), 8 states have call successors, (8), 8 states have call predecessors, (8), 17 states have return successors, (25), 8 states have call predecessors, (25), 8 states have call successors, (25) [2022-12-14 11:51:05,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 452 transitions. [2022-12-14 11:51:05,687 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 452 transitions. Word has length 31 [2022-12-14 11:51:05,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:51:05,687 INFO L495 AbstractCegarLoop]: Abstraction has 364 states and 452 transitions. [2022-12-14 11:51:05,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.444444444444445) internal successors, (40), 7 states have internal predecessors, (40), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 11:51:05,687 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 452 transitions. [2022-12-14 11:51:05,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-12-14 11:51:05,688 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:51:05,688 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:51:05,690 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (34)] Forceful destruction successful, exit code 0 [2022-12-14 11:51:05,915 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (33)] Ended with exit code 0 [2022-12-14 11:51:06,098 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-12-14 11:51:06,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:51:06,291 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting parse_inputErr16ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-14 11:51:06,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:51:06,292 INFO L85 PathProgramCache]: Analyzing trace with hash 753387604, now seen corresponding path program 1 times [2022-12-14 11:51:06,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:51:06,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [92601595] [2022-12-14 11:51:06,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:51:06,293 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 11:51:06,293 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:51:06,296 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 11:51:06,299 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2022-12-14 11:51:06,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:51:06,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 11:51:06,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:51:06,464 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:51:06,464 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:51:06,565 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:51:06,565 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:51:06,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [92601595] [2022-12-14 11:51:06,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [92601595] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:51:06,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [438960038] [2022-12-14 11:51:06,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:51:06,566 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 11:51:06,566 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 11:51:06,567 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 11:51:06,568 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (37)] Waiting until timeout for monitored process [2022-12-14 11:51:06,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:51:06,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 11:51:06,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:51:06,722 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:51:06,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:51:06,820 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:51:06,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [438960038] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:51:06,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857217395] [2022-12-14 11:51:06,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:51:06,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:51:06,821 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:51:06,822 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:51:06,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-12-14 11:51:06,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:51:06,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 11:51:06,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:51:06,969 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:51:06,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:51:07,067 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:51:07,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1857217395] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:51:07,067 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 11:51:07,067 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3, 3, 3, 3] total 3 [2022-12-14 11:51:07,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798178605] [2022-12-14 11:51:07,068 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 11:51:07,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 11:51:07,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:51:07,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 11:51:07,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 11:51:07,069 INFO L87 Difference]: Start difference. First operand 364 states and 452 transitions. Second operand has 4 states, 3 states have (on average 12.333333333333334) internal successors, (37), 4 states have internal predecessors, (37), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 11:51:07,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:51:07,111 INFO L93 Difference]: Finished difference Result 365 states and 451 transitions. [2022-12-14 11:51:07,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 11:51:07,111 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 12.333333333333334) internal successors, (37), 4 states have internal predecessors, (37), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2022-12-14 11:51:07,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:51:07,112 INFO L225 Difference]: With dead ends: 365 [2022-12-14 11:51:07,112 INFO L226 Difference]: Without dead ends: 365 [2022-12-14 11:51:07,112 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 11:51:07,113 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 49 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 11:51:07,113 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 107 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 11:51:07,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2022-12-14 11:51:07,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 362. [2022-12-14 11:51:07,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 322 states have (on average 1.2888198757763976) internal successors, (415), 345 states have internal predecessors, (415), 8 states have call successors, (8), 8 states have call predecessors, (8), 17 states have return successors, (25), 8 states have call predecessors, (25), 8 states have call successors, (25) [2022-12-14 11:51:07,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 448 transitions. [2022-12-14 11:51:07,118 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 448 transitions. Word has length 40 [2022-12-14 11:51:07,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:51:07,118 INFO L495 AbstractCegarLoop]: Abstraction has 362 states and 448 transitions. [2022-12-14 11:51:07,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 12.333333333333334) internal successors, (37), 4 states have internal predecessors, (37), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 11:51:07,119 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 448 transitions. [2022-12-14 11:51:07,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-12-14 11:51:07,119 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:51:07,119 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:51:07,121 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (37)] Ended with exit code 0 [2022-12-14 11:51:07,348 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2022-12-14 11:51:07,529 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-12-14 11:51:07,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:51:07,722 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting parse_inputErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-14 11:51:07,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:51:07,723 INFO L85 PathProgramCache]: Analyzing trace with hash -1556115366, now seen corresponding path program 1 times [2022-12-14 11:51:07,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:51:07,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [531855877] [2022-12-14 11:51:07,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:51:07,725 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 11:51:07,726 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:51:07,727 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 11:51:07,728 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2022-12-14 11:51:07,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:51:07,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-14 11:51:07,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:51:10,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:51:10,282 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-12-14 11:51:10,611 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:51:10,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:51:13,413 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:51:13,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [531855877] [2022-12-14 11:51:13,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [531855877] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:51:13,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [433692108] [2022-12-14 11:51:13,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:51:13,413 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 11:51:13,414 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 11:51:13,414 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 11:51:13,415 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (40)] Waiting until timeout for monitored process [2022-12-14 11:51:13,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:51:13,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-14 11:51:13,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:51:15,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:51:15,976 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-12-14 11:51:16,220 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:51:16,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:51:16,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [433692108] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:51:16,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29662169] [2022-12-14 11:51:16,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:51:16,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:51:16,730 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:51:16,731 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:51:16,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-12-14 11:51:16,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:51:16,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-14 11:51:16,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:51:19,122 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 11:51:19,123 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-14 11:51:19,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 11:51:19,626 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-12-14 11:51:19,906 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:51:19,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:51:20,389 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-12-14 11:51:20,389 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 14 [2022-12-14 11:51:23,163 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-12-14 11:51:23,163 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 14 [2022-12-14 11:51:25,340 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:51:25,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [29662169] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:51:25,341 INFO L184 FreeRefinementEngine]: Found 0 perfect and 4 imperfect interpolant sequences. [2022-12-14 11:51:25,341 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 5] total 14 [2022-12-14 11:51:25,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151829734] [2022-12-14 11:51:25,341 INFO L85 oduleStraightlineAll]: Using 4 imperfect interpolants to construct interpolant automaton [2022-12-14 11:51:25,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-14 11:51:25,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:51:25,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-14 11:51:25,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=202, Unknown=11, NotChecked=0, Total=272 [2022-12-14 11:51:25,343 INFO L87 Difference]: Start difference. First operand 362 states and 448 transitions. Second operand has 16 states, 15 states have (on average 6.466666666666667) internal successors, (97), 15 states have internal predecessors, (97), 3 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-14 11:51:30,515 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 11:51:38,658 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 11:51:42,907 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 11:51:44,911 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 11:51:51,211 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 11:51:53,222 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 11:51:53,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:51:53,616 INFO L93 Difference]: Finished difference Result 435 states and 520 transitions. [2022-12-14 11:51:53,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-14 11:51:53,617 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 6.466666666666667) internal successors, (97), 15 states have internal predecessors, (97), 3 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 41 [2022-12-14 11:51:53,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:51:53,618 INFO L225 Difference]: With dead ends: 435 [2022-12-14 11:51:53,618 INFO L226 Difference]: Without dead ends: 435 [2022-12-14 11:51:53,619 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 179 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 28.8s TimeCoverageRelationStatistics Valid=241, Invalid=612, Unknown=17, NotChecked=0, Total=870 [2022-12-14 11:51:53,619 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 470 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 81 mSolverCounterUnsat, 51 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 470 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 51 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.1s IncrementalHoareTripleChecker+Time [2022-12-14 11:51:53,619 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [470 Valid, 190 Invalid, 365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 233 Invalid, 51 Unknown, 0 Unchecked, 13.1s Time] [2022-12-14 11:51:53,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2022-12-14 11:51:53,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 360. [2022-12-14 11:51:53,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 322 states have (on average 1.2577639751552796) internal successors, (405), 343 states have internal predecessors, (405), 8 states have call successors, (8), 8 states have call predecessors, (8), 17 states have return successors, (25), 8 states have call predecessors, (25), 8 states have call successors, (25) [2022-12-14 11:51:53,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 438 transitions. [2022-12-14 11:51:53,625 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 438 transitions. Word has length 41 [2022-12-14 11:51:53,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:51:53,625 INFO L495 AbstractCegarLoop]: Abstraction has 360 states and 438 transitions. [2022-12-14 11:51:53,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 6.466666666666667) internal successors, (97), 15 states have internal predecessors, (97), 3 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-14 11:51:53,625 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 438 transitions. [2022-12-14 11:51:53,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-12-14 11:51:53,625 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:51:53,626 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:51:53,629 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (40)] Ended with exit code 0 [2022-12-14 11:51:53,831 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2022-12-14 11:51:54,040 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (39)] Ended with exit code 0 [2022-12-14 11:51:54,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 11:51:54,228 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting parse_inputErr17ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-14 11:51:54,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:51:54,229 INFO L85 PathProgramCache]: Analyzing trace with hash 1880179342, now seen corresponding path program 1 times [2022-12-14 11:51:54,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:51:54,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1325133301] [2022-12-14 11:51:54,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:51:54,230 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 11:51:54,231 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:51:54,233 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 11:51:54,236 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2022-12-14 11:51:54,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:51:54,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-14 11:51:54,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:51:54,722 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:51:54,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:51:54,911 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:51:54,912 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:51:54,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1325133301] [2022-12-14 11:51:54,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1325133301] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:51:54,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1730220668] [2022-12-14 11:51:54,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:51:54,912 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 11:51:54,912 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 11:51:54,913 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 11:51:54,914 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (43)] Waiting until timeout for monitored process [2022-12-14 11:51:54,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:51:54,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 11:51:55,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:51:55,108 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:51:55,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:51:55,271 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:51:55,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1730220668] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:51:55,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294138953] [2022-12-14 11:51:55,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:51:55,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:51:55,272 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:51:55,273 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:51:55,274 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-12-14 11:51:55,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:51:55,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 11:51:55,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:51:55,476 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:51:55,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:51:55,646 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:51:55,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1294138953] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:51:55,646 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 11:51:55,646 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3, 3, 3, 3] total 6 [2022-12-14 11:51:55,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128534907] [2022-12-14 11:51:55,647 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 11:51:55,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 11:51:55,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:51:55,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 11:51:55,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-12-14 11:51:55,648 INFO L87 Difference]: Start difference. First operand 360 states and 438 transitions. Second operand has 7 states, 6 states have (on average 12.666666666666666) internal successors, (76), 7 states have internal predecessors, (76), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 11:51:55,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:51:55,879 INFO L93 Difference]: Finished difference Result 320 states and 377 transitions. [2022-12-14 11:51:55,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 11:51:55,881 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 12.666666666666666) internal successors, (76), 7 states have internal predecessors, (76), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 41 [2022-12-14 11:51:55,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:51:55,883 INFO L225 Difference]: With dead ends: 320 [2022-12-14 11:51:55,883 INFO L226 Difference]: Without dead ends: 320 [2022-12-14 11:51:55,883 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 235 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2022-12-14 11:51:55,884 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 108 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 11:51:55,884 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 156 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 11:51:55,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2022-12-14 11:51:55,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 298. [2022-12-14 11:51:55,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 268 states have (on average 1.25) internal successors, (335), 283 states have internal predecessors, (335), 7 states have call successors, (7), 7 states have call predecessors, (7), 12 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2022-12-14 11:51:55,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 358 transitions. [2022-12-14 11:51:55,890 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 358 transitions. Word has length 41 [2022-12-14 11:51:55,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:51:55,891 INFO L495 AbstractCegarLoop]: Abstraction has 298 states and 358 transitions. [2022-12-14 11:51:55,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 12.666666666666666) internal successors, (76), 7 states have internal predecessors, (76), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 11:51:55,891 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 358 transitions. [2022-12-14 11:51:55,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-12-14 11:51:55,891 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:51:55,891 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:51:55,893 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (43)] Forceful destruction successful, exit code 0 [2022-12-14 11:51:56,099 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (42)] Ended with exit code 0 [2022-12-14 11:51:56,300 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2022-12-14 11:51:56,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:51:56,494 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting parse_inputErr18ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-14 11:51:56,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:51:56,495 INFO L85 PathProgramCache]: Analyzing trace with hash -1843982442, now seen corresponding path program 1 times [2022-12-14 11:51:56,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:51:56,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1248800527] [2022-12-14 11:51:56,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:51:56,496 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 11:51:56,496 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:51:56,497 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 11:51:56,498 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2022-12-14 11:51:56,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:51:56,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 11:51:56,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:51:56,672 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 7 [2022-12-14 11:51:56,796 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 11:51:56,796 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-12-14 11:51:56,832 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:51:56,832 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:51:57,002 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:51:57,002 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:51:57,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1248800527] [2022-12-14 11:51:57,003 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1248800527] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:51:57,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [94005432] [2022-12-14 11:51:57,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:51:57,003 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 11:51:57,003 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 11:51:57,004 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 11:51:57,005 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (46)] Waiting until timeout for monitored process [2022-12-14 11:51:57,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:51:57,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 11:51:57,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:51:57,217 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 7 [2022-12-14 11:51:57,323 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 11:51:57,323 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-12-14 11:51:57,353 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:51:57,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:51:57,526 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:51:57,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [94005432] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:51:57,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689708620] [2022-12-14 11:51:57,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:51:57,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:51:57,527 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:51:57,528 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:51:57,529 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-12-14 11:51:57,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:51:57,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 11:51:57,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:51:57,604 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 7 [2022-12-14 11:51:57,720 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 11:51:57,720 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-12-14 11:51:57,742 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:51:57,743 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:51:57,929 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:51:57,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689708620] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:51:57,929 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 11:51:57,929 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3, 3, 3, 3] total 3 [2022-12-14 11:51:57,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373919817] [2022-12-14 11:51:57,930 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 11:51:57,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 11:51:57,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:51:57,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 11:51:57,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 11:51:57,931 INFO L87 Difference]: Start difference. First operand 298 states and 358 transitions. Second operand has 4 states, 3 states have (on average 13.0) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 11:51:58,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:51:58,136 INFO L93 Difference]: Finished difference Result 320 states and 377 transitions. [2022-12-14 11:51:58,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 11:51:58,136 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 13.0) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2022-12-14 11:51:58,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:51:58,137 INFO L225 Difference]: With dead ends: 320 [2022-12-14 11:51:58,137 INFO L226 Difference]: Without dead ends: 320 [2022-12-14 11:51:58,138 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 239 SyntacticMatches, 5 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 11:51:58,138 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 31 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 11:51:58,139 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 153 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 11:51:58,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2022-12-14 11:51:58,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 306. [2022-12-14 11:51:58,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 276 states have (on average 1.2427536231884058) internal successors, (343), 291 states have internal predecessors, (343), 7 states have call successors, (7), 7 states have call predecessors, (7), 12 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2022-12-14 11:51:58,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 366 transitions. [2022-12-14 11:51:58,143 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 366 transitions. Word has length 42 [2022-12-14 11:51:58,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:51:58,143 INFO L495 AbstractCegarLoop]: Abstraction has 306 states and 366 transitions. [2022-12-14 11:51:58,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 13.0) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 11:51:58,143 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 366 transitions. [2022-12-14 11:51:58,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-12-14 11:51:58,144 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:51:58,144 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:51:58,150 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2022-12-14 11:51:58,374 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (45)] Ended with exit code 0 [2022-12-14 11:51:58,552 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (46)] Ended with exit code 0 [2022-12-14 11:51:58,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 11:51:58,747 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting parse_inputErr10ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-14 11:51:58,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:51:58,748 INFO L85 PathProgramCache]: Analyzing trace with hash -639148643, now seen corresponding path program 1 times [2022-12-14 11:51:58,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:51:58,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1646141714] [2022-12-14 11:51:58,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:51:58,750 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 11:51:58,751 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:51:58,752 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 11:51:58,753 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2022-12-14 11:51:58,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:51:58,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 11:51:58,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:51:58,846 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-12-14 11:51:58,846 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:51:58,847 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:51:58,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1646141714] [2022-12-14 11:51:58,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1646141714] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:51:58,847 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:51:58,847 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 11:51:58,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565894362] [2022-12-14 11:51:58,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:51:58,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 11:51:58,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:51:58,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 11:51:58,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 11:51:58,848 INFO L87 Difference]: Start difference. First operand 306 states and 366 transitions. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 11:51:58,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:51:58,852 INFO L93 Difference]: Finished difference Result 258 states and 294 transitions. [2022-12-14 11:51:58,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 11:51:58,852 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2022-12-14 11:51:58,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:51:58,853 INFO L225 Difference]: With dead ends: 258 [2022-12-14 11:51:58,853 INFO L226 Difference]: Without dead ends: 258 [2022-12-14 11:51:58,853 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 45 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 11:51:58,854 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 4 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 1 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 11:51:58,854 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 96 Invalid, 1 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 11:51:58,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2022-12-14 11:51:58,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 245. [2022-12-14 11:51:58,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 223 states have (on average 1.1838565022421526) internal successors, (264), 232 states have internal predecessors, (264), 6 states have call successors, (6), 6 states have call predecessors, (6), 9 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) [2022-12-14 11:51:58,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 281 transitions. [2022-12-14 11:51:58,858 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 281 transitions. Word has length 47 [2022-12-14 11:51:58,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:51:58,858 INFO L495 AbstractCegarLoop]: Abstraction has 245 states and 281 transitions. [2022-12-14 11:51:58,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 11:51:58,858 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 281 transitions. [2022-12-14 11:51:58,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-12-14 11:51:58,858 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:51:58,859 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:51:58,871 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (48)] Forceful destruction successful, exit code 0 [2022-12-14 11:51:59,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 11:51:59,059 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-14 11:51:59,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:51:59,059 INFO L85 PathProgramCache]: Analyzing trace with hash 825866446, now seen corresponding path program 1 times [2022-12-14 11:51:59,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:51:59,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1613017067] [2022-12-14 11:51:59,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:51:59,060 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 11:51:59,060 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:51:59,061 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 11:51:59,062 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (49)] Waiting until timeout for monitored process [2022-12-14 11:51:59,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:51:59,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 11:51:59,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:51:59,392 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-12-14 11:51:59,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:51:59,852 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-12-14 11:51:59,853 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:51:59,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1613017067] [2022-12-14 11:51:59,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1613017067] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:51:59,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [72311932] [2022-12-14 11:51:59,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:51:59,853 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 11:51:59,853 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 11:51:59,854 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 11:51:59,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (50)] Waiting until timeout for monitored process [2022-12-14 11:51:59,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:52:00,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 11:52:00,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:52:00,347 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-12-14 11:52:00,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:52:00,728 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-12-14 11:52:00,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [72311932] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:52:00,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341531957] [2022-12-14 11:52:00,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:52:00,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:52:00,728 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:52:00,729 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:52:00,730 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-12-14 11:52:00,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:52:00,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 11:52:00,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:52:01,012 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-12-14 11:52:01,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:52:01,414 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-12-14 11:52:01,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341531957] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:52:01,414 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 11:52:01,414 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 10 [2022-12-14 11:52:01,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695497781] [2022-12-14 11:52:01,414 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 11:52:01,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-14 11:52:01,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:52:01,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-14 11:52:01,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-12-14 11:52:01,416 INFO L87 Difference]: Start difference. First operand 245 states and 281 transitions. Second operand has 12 states, 11 states have (on average 4.0) internal successors, (44), 8 states have internal predecessors, (44), 2 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-12-14 11:52:02,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:52:02,203 INFO L93 Difference]: Finished difference Result 261 states and 292 transitions. [2022-12-14 11:52:02,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-14 11:52:02,204 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.0) internal successors, (44), 8 states have internal predecessors, (44), 2 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 51 [2022-12-14 11:52:02,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:52:02,204 INFO L225 Difference]: With dead ends: 261 [2022-12-14 11:52:02,204 INFO L226 Difference]: Without dead ends: 261 [2022-12-14 11:52:02,205 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 290 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=157, Invalid=349, Unknown=0, NotChecked=0, Total=506 [2022-12-14 11:52:02,205 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 251 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 11:52:02,206 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [251 Valid, 257 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 11:52:02,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2022-12-14 11:52:02,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 245. [2022-12-14 11:52:02,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 223 states have (on average 1.1748878923766817) internal successors, (262), 232 states have internal predecessors, (262), 6 states have call successors, (6), 6 states have call predecessors, (6), 9 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) [2022-12-14 11:52:02,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 279 transitions. [2022-12-14 11:52:02,209 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 279 transitions. Word has length 51 [2022-12-14 11:52:02,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:52:02,210 INFO L495 AbstractCegarLoop]: Abstraction has 245 states and 279 transitions. [2022-12-14 11:52:02,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.0) internal successors, (44), 8 states have internal predecessors, (44), 2 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-12-14 11:52:02,210 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 279 transitions. [2022-12-14 11:52:02,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-12-14 11:52:02,210 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:52:02,210 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:52:02,219 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (49)] Forceful destruction successful, exit code 0 [2022-12-14 11:52:02,426 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2022-12-14 11:52:02,617 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (50)] Ended with exit code 0 [2022-12-14 11:52:02,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 11:52:02,813 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-14 11:52:02,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:52:02,814 INFO L85 PathProgramCache]: Analyzing trace with hash -563187969, now seen corresponding path program 1 times [2022-12-14 11:52:02,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:52:02,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [259762595] [2022-12-14 11:52:02,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:52:02,815 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 11:52:02,816 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:52:02,818 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 11:52:02,821 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (52)] Waiting until timeout for monitored process [2022-12-14 11:52:02,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:52:02,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 11:52:02,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:52:03,173 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 11:52:03,173 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-14 11:52:05,842 INFO L321 Elim1Store]: treesize reduction 34, result has 40.4 percent of original size [2022-12-14 11:52:05,843 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 38 [2022-12-14 11:52:05,885 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 13 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:52:05,885 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:52:06,058 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-12-14 11:52:06,058 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 128 treesize of output 123 [2022-12-14 11:52:09,180 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:52:09,180 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:52:09,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [259762595] [2022-12-14 11:52:09,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [259762595] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:52:09,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [240662269] [2022-12-14 11:52:09,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:52:09,180 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 11:52:09,180 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 11:52:09,181 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 11:52:09,182 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (53)] Waiting until timeout for monitored process [2022-12-14 11:52:09,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:52:09,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 11:52:09,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:52:09,702 INFO L321 Elim1Store]: treesize reduction 12, result has 42.9 percent of original size [2022-12-14 11:52:09,703 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 22 [2022-12-14 11:52:10,065 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 11:52:10,066 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-12-14 11:52:10,157 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-12-14 11:52:10,158 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 24 [2022-12-14 11:52:10,350 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:52:10,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:52:10,484 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-12-14 11:52:10,485 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 128 treesize of output 123 [2022-12-14 11:52:17,055 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-12-14 11:52:17,056 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 63 [2022-12-14 11:52:17,420 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:52:17,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [240662269] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:52:17,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791599371] [2022-12-14 11:52:17,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:52:17,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:52:17,421 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:52:17,422 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:52:17,423 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-12-14 11:52:17,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:52:17,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 11:52:17,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:52:17,552 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 11:52:17,553 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-14 11:52:17,924 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 11:52:17,925 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-12-14 11:52:18,007 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-12-14 11:52:18,007 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 24 [2022-12-14 11:52:18,069 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 16 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:52:18,070 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:52:18,183 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-12-14 11:52:18,183 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 128 treesize of output 123 [2022-12-14 11:52:28,729 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-12-14 11:52:28,730 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 63 [2022-12-14 11:52:28,905 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:52:28,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1791599371] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:52:28,905 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 11:52:28,906 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 10, 7, 8] total 31 [2022-12-14 11:52:28,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266697861] [2022-12-14 11:52:28,906 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 11:52:28,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-12-14 11:52:28,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:52:28,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-12-14 11:52:28,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=795, Unknown=9, NotChecked=0, Total=992 [2022-12-14 11:52:28,908 INFO L87 Difference]: Start difference. First operand 245 states and 279 transitions. Second operand has 32 states, 29 states have (on average 6.172413793103448) internal successors, (179), 30 states have internal predecessors, (179), 7 states have call successors, (11), 10 states have call predecessors, (11), 6 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) [2022-12-14 11:52:43,005 WARN L233 SmtUtils]: Spent 9.21s on a formula simplification. DAG size of input: 42 DAG size of output: 33 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 11:52:44,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:52:44,515 INFO L93 Difference]: Finished difference Result 247 states and 281 transitions. [2022-12-14 11:52:44,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 11:52:44,516 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 29 states have (on average 6.172413793103448) internal successors, (179), 30 states have internal predecessors, (179), 7 states have call successors, (11), 10 states have call predecessors, (11), 6 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) Word has length 51 [2022-12-14 11:52:44,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:52:44,516 INFO L225 Difference]: With dead ends: 247 [2022-12-14 11:52:44,517 INFO L226 Difference]: Without dead ends: 247 [2022-12-14 11:52:44,517 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 265 SyntacticMatches, 7 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 37.0s TimeCoverageRelationStatistics Valid=378, Invalid=1095, Unknown=9, NotChecked=0, Total=1482 [2022-12-14 11:52:44,517 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 346 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 346 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 11:52:44,518 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [346 Valid, 118 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 11:52:44,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2022-12-14 11:52:44,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 244. [2022-12-14 11:52:44,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 223 states have (on average 1.1704035874439462) internal successors, (261), 231 states have internal predecessors, (261), 6 states have call successors, (6), 6 states have call predecessors, (6), 9 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) [2022-12-14 11:52:44,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 278 transitions. [2022-12-14 11:52:44,521 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 278 transitions. Word has length 51 [2022-12-14 11:52:44,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:52:44,521 INFO L495 AbstractCegarLoop]: Abstraction has 244 states and 278 transitions. [2022-12-14 11:52:44,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 29 states have (on average 6.172413793103448) internal successors, (179), 30 states have internal predecessors, (179), 7 states have call successors, (11), 10 states have call predecessors, (11), 6 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) [2022-12-14 11:52:44,521 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 278 transitions. [2022-12-14 11:52:44,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-12-14 11:52:44,522 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:52:44,522 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:52:44,536 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (52)] Forceful destruction successful, exit code 0 [2022-12-14 11:52:44,731 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2022-12-14 11:52:44,931 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (53)] Forceful destruction successful, exit code 0 [2022-12-14 11:52:45,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 11:52:45,124 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting parse_inputErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-14 11:52:45,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:52:45,125 INFO L85 PathProgramCache]: Analyzing trace with hash -167943901, now seen corresponding path program 1 times [2022-12-14 11:52:45,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:52:45,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [235126716] [2022-12-14 11:52:45,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:52:45,127 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 11:52:45,127 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:52:45,128 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 11:52:45,129 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (55)] Waiting until timeout for monitored process [2022-12-14 11:52:45,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:52:45,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 11:52:45,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:52:45,533 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-12-14 11:52:45,533 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:52:45,974 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-12-14 11:52:45,974 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:52:45,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [235126716] [2022-12-14 11:52:45,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [235126716] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:52:45,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [431948367] [2022-12-14 11:52:45,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:52:45,975 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 11:52:45,975 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 11:52:45,976 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 11:52:45,977 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (56)] Waiting until timeout for monitored process [2022-12-14 11:52:46,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:52:46,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 11:52:46,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:52:46,381 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-12-14 11:52:46,382 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:52:46,760 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-12-14 11:52:46,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [431948367] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:52:46,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899329237] [2022-12-14 11:52:46,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:52:46,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:52:46,761 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:52:46,762 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:52:46,763 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-12-14 11:52:46,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:52:46,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 11:52:46,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:52:47,097 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-12-14 11:52:47,097 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:52:47,495 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-12-14 11:52:47,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1899329237] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:52:47,496 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 11:52:47,496 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 8 [2022-12-14 11:52:47,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137816596] [2022-12-14 11:52:47,496 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 11:52:47,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-14 11:52:47,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:52:47,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-14 11:52:47,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-12-14 11:52:47,497 INFO L87 Difference]: Start difference. First operand 244 states and 278 transitions. Second operand has 10 states, 9 states have (on average 4.444444444444445) internal successors, (40), 7 states have internal predecessors, (40), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-14 11:52:48,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:52:48,228 INFO L93 Difference]: Finished difference Result 252 states and 283 transitions. [2022-12-14 11:52:48,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-14 11:52:48,229 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.444444444444445) internal successors, (40), 7 states have internal predecessors, (40), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 52 [2022-12-14 11:52:48,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:52:48,229 INFO L225 Difference]: With dead ends: 252 [2022-12-14 11:52:48,230 INFO L226 Difference]: Without dead ends: 252 [2022-12-14 11:52:48,230 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 298 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2022-12-14 11:52:48,230 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 222 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 11:52:48,230 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [222 Valid, 274 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 11:52:48,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2022-12-14 11:52:48,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 243. [2022-12-14 11:52:48,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 223 states have (on average 1.15695067264574) internal successors, (258), 230 states have internal predecessors, (258), 6 states have call successors, (6), 6 states have call predecessors, (6), 9 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) [2022-12-14 11:52:48,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 275 transitions. [2022-12-14 11:52:48,236 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 275 transitions. Word has length 52 [2022-12-14 11:52:48,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:52:48,236 INFO L495 AbstractCegarLoop]: Abstraction has 243 states and 275 transitions. [2022-12-14 11:52:48,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.444444444444445) internal successors, (40), 7 states have internal predecessors, (40), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-14 11:52:48,236 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 275 transitions. [2022-12-14 11:52:48,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-12-14 11:52:48,237 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:52:48,237 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:52:48,240 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (56)] Ended with exit code 0 [2022-12-14 11:52:48,447 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (55)] Ended with exit code 0 [2022-12-14 11:52:48,647 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2022-12-14 11:52:48,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:52:48,840 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-14 11:52:48,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:52:48,841 INFO L85 PathProgramCache]: Analyzing trace with hash -278957874, now seen corresponding path program 1 times [2022-12-14 11:52:48,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:52:48,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1262380819] [2022-12-14 11:52:48,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:52:48,842 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 11:52:48,842 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:52:48,843 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 11:52:48,844 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (58)] Waiting until timeout for monitored process [2022-12-14 11:52:49,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:52:49,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-14 11:52:49,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:52:49,564 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 11:52:49,564 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-12-14 11:52:52,595 INFO L321 Elim1Store]: treesize reduction 46, result has 40.3 percent of original size [2022-12-14 11:52:52,596 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 46 [2022-12-14 11:52:52,739 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 11:52:52,800 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 13 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:52:52,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:52:53,220 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:52:53,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1262380819] [2022-12-14 11:52:53,220 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1262380819] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:52:53,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [233830161] [2022-12-14 11:52:53,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:52:53,220 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 11:52:53,221 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 11:52:53,221 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 11:52:53,222 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (59)] Waiting until timeout for monitored process [2022-12-14 11:52:53,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:52:53,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 26 conjunts are in the unsatisfiable core [2022-12-14 11:52:53,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:52:54,021 INFO L321 Elim1Store]: treesize reduction 44, result has 34.3 percent of original size [2022-12-14 11:52:54,022 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 43 [2022-12-14 11:52:56,904 INFO L321 Elim1Store]: treesize reduction 68, result has 38.2 percent of original size [2022-12-14 11:52:56,904 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 62 [2022-12-14 11:52:57,150 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 11:52:57,236 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 13 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:52:57,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:52:59,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [233830161] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:52:59,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862632444] [2022-12-14 11:52:59,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:52:59,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:52:59,539 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:52:59,540 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:52:59,541 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-12-14 11:52:59,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:52:59,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-14 11:52:59,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:53:00,046 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 11:53:00,047 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-12-14 11:53:00,771 INFO L321 Elim1Store]: treesize reduction 34, result has 37.0 percent of original size [2022-12-14 11:53:00,771 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 35 [2022-12-14 11:53:00,885 INFO L321 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2022-12-14 11:53:00,886 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 32 [2022-12-14 11:53:01,123 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 11:53:01,130 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:53:01,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:53:01,317 INFO L321 Elim1Store]: treesize reduction 7, result has 50.0 percent of original size [2022-12-14 11:53:01,317 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 196 treesize of output 183 [2022-12-14 11:53:04,157 INFO L321 Elim1Store]: treesize reduction 7, result has 82.1 percent of original size [2022-12-14 11:53:04,158 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 94 treesize of output 115 [2022-12-14 11:53:05,173 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 1 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:53:05,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [862632444] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:53:05,174 INFO L184 FreeRefinementEngine]: Found 0 perfect and 4 imperfect interpolant sequences. [2022-12-14 11:53:05,174 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 12, 13] total 39 [2022-12-14 11:53:05,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12856564] [2022-12-14 11:53:05,174 INFO L85 oduleStraightlineAll]: Using 4 imperfect interpolants to construct interpolant automaton [2022-12-14 11:53:05,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-12-14 11:53:05,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:53:05,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-12-14 11:53:05,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=1575, Unknown=5, NotChecked=0, Total=1806 [2022-12-14 11:53:05,177 INFO L87 Difference]: Start difference. First operand 243 states and 275 transitions. Second operand has 41 states, 36 states have (on average 3.6666666666666665) internal successors, (132), 33 states have internal predecessors, (132), 7 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-12-14 11:53:08,061 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 11:53:12,229 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 11:53:49,651 WARN L233 SmtUtils]: Spent 7.35s on a formula simplification. DAG size of input: 48 DAG size of output: 39 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 11:53:58,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:53:58,319 INFO L93 Difference]: Finished difference Result 283 states and 316 transitions. [2022-12-14 11:53:58,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-14 11:53:58,319 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 36 states have (on average 3.6666666666666665) internal successors, (132), 33 states have internal predecessors, (132), 7 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 52 [2022-12-14 11:53:58,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:53:58,320 INFO L225 Difference]: With dead ends: 283 [2022-12-14 11:53:58,320 INFO L226 Difference]: Without dead ends: 283 [2022-12-14 11:53:58,321 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 168 SyntacticMatches, 7 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 982 ImplicationChecksByTransitivity, 57.9s TimeCoverageRelationStatistics Valid=720, Invalid=2807, Unknown=13, NotChecked=0, Total=3540 [2022-12-14 11:53:58,321 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 507 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 551 mSolverCounterSat, 104 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 507 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 658 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 551 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.5s IncrementalHoareTripleChecker+Time [2022-12-14 11:53:58,321 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [507 Valid, 288 Invalid, 658 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 551 Invalid, 3 Unknown, 0 Unchecked, 6.5s Time] [2022-12-14 11:53:58,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2022-12-14 11:53:58,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 243. [2022-12-14 11:53:58,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 223 states have (on average 1.1524663677130045) internal successors, (257), 230 states have internal predecessors, (257), 6 states have call successors, (6), 6 states have call predecessors, (6), 9 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) [2022-12-14 11:53:58,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 274 transitions. [2022-12-14 11:53:58,327 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 274 transitions. Word has length 52 [2022-12-14 11:53:58,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:53:58,328 INFO L495 AbstractCegarLoop]: Abstraction has 243 states and 274 transitions. [2022-12-14 11:53:58,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 36 states have (on average 3.6666666666666665) internal successors, (132), 33 states have internal predecessors, (132), 7 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-12-14 11:53:58,328 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 274 transitions. [2022-12-14 11:53:58,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-12-14 11:53:58,328 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:53:58,328 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:53:58,337 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (58)] Ended with exit code 0 [2022-12-14 11:53:58,544 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2022-12-14 11:53:58,737 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (59)] Forceful destruction successful, exit code 0 [2022-12-14 11:53:58,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt [2022-12-14 11:53:58,930 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-14 11:53:58,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:53:58,932 INFO L85 PathProgramCache]: Analyzing trace with hash -1790543120, now seen corresponding path program 1 times [2022-12-14 11:53:58,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:53:58,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1610507346] [2022-12-14 11:53:58,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:53:58,933 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 11:53:58,934 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:53:58,934 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 11:53:58,935 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (61)] Waiting until timeout for monitored process [2022-12-14 11:53:59,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:53:59,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-14 11:53:59,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:53:59,249 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 11:53:59,249 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-12-14 11:53:59,511 WARN L859 $PredicateComparison]: unable to prove that (exists ((|parse_input_c1_~x~0#1.base| (_ BitVec 32)) (v_ArrVal_191 (_ BitVec 1)) (v_ArrVal_190 (_ BitVec 1))) (and (= (store (store |c_old(#valid)| |parse_input_c1_~x~0#1.base| v_ArrVal_190) |c_old(~global~0.base)| v_ArrVal_191) |c_#valid|) (= (_ bv0 1) (select |c_old(#valid)| |parse_input_c1_~x~0#1.base|)))) is different from true [2022-12-14 11:53:59,613 INFO L321 Elim1Store]: treesize reduction 44, result has 34.3 percent of original size [2022-12-14 11:53:59,613 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 29 treesize of output 43 [2022-12-14 11:53:59,738 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 13 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 5 not checked. [2022-12-14 11:53:59,739 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:54:00,020 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:54:00,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1610507346] [2022-12-14 11:54:00,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1610507346] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:54:00,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [966891116] [2022-12-14 11:54:00,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:54:00,021 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 11:54:00,021 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 11:54:00,021 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 11:54:00,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (62)] Waiting until timeout for monitored process [2022-12-14 11:54:00,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:54:00,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-14 11:54:00,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:54:00,691 INFO L321 Elim1Store]: treesize reduction 44, result has 34.3 percent of original size [2022-12-14 11:54:00,692 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 43 [2022-12-14 11:54:00,979 WARN L859 $PredicateComparison]: unable to prove that (exists ((|parse_input_c1_~x~0#1.base| (_ BitVec 32)) (v_ArrVal_205 (_ BitVec 1))) (= |c_#valid| (store (store |c_old(#valid)| |parse_input_c1_~x~0#1.base| (_ bv1 1)) |c_old(~global~0.base)| v_ArrVal_205))) is different from true [2022-12-14 11:54:01,085 INFO L321 Elim1Store]: treesize reduction 44, result has 37.1 percent of original size [2022-12-14 11:54:01,085 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 3 case distinctions, treesize of input 24 treesize of output 43 [2022-12-14 11:54:01,291 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 13 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 5 not checked. [2022-12-14 11:54:01,291 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:54:01,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [966891116] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:54:01,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687989343] [2022-12-14 11:54:01,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:54:01,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:54:01,503 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:54:01,504 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:54:01,505 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-12-14 11:54:01,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:54:01,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-14 11:54:01,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:54:01,800 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 11:54:01,800 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-12-14 11:54:02,092 WARN L859 $PredicateComparison]: unable to prove that (exists ((|parse_input_c1_~x~0#1.base| (_ BitVec 32)) (v_ArrVal_190 (_ BitVec 1)) (v_ArrVal_217 (_ BitVec 1))) (and (= (store (store |c_old(#valid)| |parse_input_c1_~x~0#1.base| v_ArrVal_190) |c_old(~global~0.base)| v_ArrVal_217) |c_#valid|) (= (_ bv0 1) (select |c_old(#valid)| |parse_input_c1_~x~0#1.base|)))) is different from true [2022-12-14 11:54:02,203 INFO L321 Elim1Store]: treesize reduction 34, result has 40.4 percent of original size [2022-12-14 11:54:02,203 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 38 [2022-12-14 11:54:02,254 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 13 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 5 not checked. [2022-12-14 11:54:02,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:54:08,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [687989343] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:54:08,551 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 11:54:08,551 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-12-14 11:54:08,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811574847] [2022-12-14 11:54:08,551 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 11:54:08,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-14 11:54:08,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:54:08,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-14 11:54:08,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=471, Unknown=5, NotChecked=138, Total=702 [2022-12-14 11:54:08,553 INFO L87 Difference]: Start difference. First operand 243 states and 274 transitions. Second operand has 22 states, 18 states have (on average 4.388888888888889) internal successors, (79), 16 states have internal predecessors, (79), 5 states have call successors, (7), 4 states have call predecessors, (7), 5 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-12-14 11:55:06,713 WARN L859 $PredicateComparison]: unable to prove that (and (exists ((|parse_input_c1_~x~0#1.base| (_ BitVec 32)) (v_ArrVal_205 (_ BitVec 1))) (= |c_#valid| (store (store |c_old(#valid)| |parse_input_c1_~x~0#1.base| (_ bv1 1)) |c_old(~global~0.base)| v_ArrVal_205))) (exists ((|parse_input_c1_~x~0#1.base| (_ BitVec 32)) (v_ArrVal_191 (_ BitVec 1)) (v_ArrVal_190 (_ BitVec 1))) (and (= (store (store |c_old(#valid)| |parse_input_c1_~x~0#1.base| v_ArrVal_190) |c_old(~global~0.base)| v_ArrVal_191) |c_#valid|) (= (_ bv0 1) (select |c_old(#valid)| |parse_input_c1_~x~0#1.base|)))) (exists ((|parse_input_c1_~x~0#1.base| (_ BitVec 32)) (v_ArrVal_190 (_ BitVec 1)) (v_ArrVal_217 (_ BitVec 1))) (and (= (store (store |c_old(#valid)| |parse_input_c1_~x~0#1.base| v_ArrVal_190) |c_old(~global~0.base)| v_ArrVal_217) |c_#valid|) (= (_ bv0 1) (select |c_old(#valid)| |parse_input_c1_~x~0#1.base|))))) is different from true [2022-12-14 11:55:06,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:55:06,863 INFO L93 Difference]: Finished difference Result 272 states and 298 transitions. [2022-12-14 11:55:06,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-12-14 11:55:06,864 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 18 states have (on average 4.388888888888889) internal successors, (79), 16 states have internal predecessors, (79), 5 states have call successors, (7), 4 states have call predecessors, (7), 5 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 54 [2022-12-14 11:55:06,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:55:06,864 INFO L225 Difference]: With dead ends: 272 [2022-12-14 11:55:06,864 INFO L226 Difference]: Without dead ends: 272 [2022-12-14 11:55:06,865 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 156 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 4 IntricatePredicates, 1 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 64.0s TimeCoverageRelationStatistics Valid=426, Invalid=1545, Unknown=25, NotChecked=356, Total=2352 [2022-12-14 11:55:06,865 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 386 mSDsluCounter, 451 mSDsCounter, 0 mSdLazyCounter, 613 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 386 SdHoareTripleChecker+Valid, 528 SdHoareTripleChecker+Invalid, 1043 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 613 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 380 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-12-14 11:55:06,865 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [386 Valid, 528 Invalid, 1043 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 613 Invalid, 0 Unknown, 380 Unchecked, 1.5s Time] [2022-12-14 11:55:06,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2022-12-14 11:55:06,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 254. [2022-12-14 11:55:06,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 235 states have (on average 1.1404255319148937) internal successors, (268), 241 states have internal predecessors, (268), 6 states have call successors, (6), 6 states have call predecessors, (6), 9 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2022-12-14 11:55:06,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 283 transitions. [2022-12-14 11:55:06,869 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 283 transitions. Word has length 54 [2022-12-14 11:55:06,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:55:06,869 INFO L495 AbstractCegarLoop]: Abstraction has 254 states and 283 transitions. [2022-12-14 11:55:06,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 18 states have (on average 4.388888888888889) internal successors, (79), 16 states have internal predecessors, (79), 5 states have call successors, (7), 4 states have call predecessors, (7), 5 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-12-14 11:55:06,869 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 283 transitions. [2022-12-14 11:55:06,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-12-14 11:55:06,870 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:55:06,870 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:55:06,893 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (61)] Ended with exit code 0 [2022-12-14 11:55:07,079 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (62)] Ended with exit code 0 [2022-12-14 11:55:07,279 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2022-12-14 11:55:07,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:55:07,472 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-14 11:55:07,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:55:07,473 INFO L85 PathProgramCache]: Analyzing trace with hash -1294554201, now seen corresponding path program 1 times [2022-12-14 11:55:07,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:55:07,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [868236116] [2022-12-14 11:55:07,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:55:07,475 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 11:55:07,475 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:55:07,476 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 11:55:07,477 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (64)] Waiting until timeout for monitored process [2022-12-14 11:55:07,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:55:07,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-14 11:55:07,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:55:08,124 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 11:55:08,125 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-12-14 11:55:10,934 INFO L321 Elim1Store]: treesize reduction 44, result has 34.3 percent of original size [2022-12-14 11:55:10,934 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 29 treesize of output 43 [2022-12-14 11:55:11,215 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 11:55:11,263 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 13 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:55:11,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:55:11,837 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:55:11,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [868236116] [2022-12-14 11:55:11,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [868236116] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:55:11,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1858388969] [2022-12-14 11:55:11,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:55:11,838 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 11:55:11,838 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 11:55:11,839 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 11:55:11,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (65)] Waiting until timeout for monitored process [2022-12-14 11:55:12,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:55:12,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-14 11:55:12,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:55:16,779 INFO L321 Elim1Store]: treesize reduction 44, result has 34.3 percent of original size [2022-12-14 11:55:16,779 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 43 [2022-12-14 11:55:23,919 INFO L321 Elim1Store]: treesize reduction 44, result has 37.1 percent of original size [2022-12-14 11:55:23,919 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 3 case distinctions, treesize of input 24 treesize of output 43 [2022-12-14 11:55:24,412 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 11:55:24,506 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 13 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:55:24,506 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:55:24,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1858388969] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:55:24,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625240481] [2022-12-14 11:55:24,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:55:24,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:55:24,906 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:55:24,907 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:55:24,908 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-12-14 11:55:24,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:55:25,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-14 11:55:25,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:55:27,445 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 11:55:27,445 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-12-14 11:55:30,298 INFO L321 Elim1Store]: treesize reduction 34, result has 40.4 percent of original size [2022-12-14 11:55:30,299 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 38 [2022-12-14 11:55:30,475 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 11:55:30,479 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 13 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:55:30,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:55:34,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1625240481] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:55:34,852 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 11:55:34,852 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2022-12-14 11:55:34,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486737305] [2022-12-14 11:55:34,852 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 11:55:34,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-14 11:55:34,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:55:34,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-14 11:55:34,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=737, Unknown=16, NotChecked=0, Total=870 [2022-12-14 11:55:34,853 INFO L87 Difference]: Start difference. First operand 254 states and 283 transitions. Second operand has 23 states, 19 states have (on average 4.526315789473684) internal successors, (86), 19 states have internal predecessors, (86), 5 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-12-14 11:56:29,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:56:29,968 INFO L93 Difference]: Finished difference Result 330 states and 356 transitions. [2022-12-14 11:56:29,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-12-14 11:56:29,968 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 19 states have (on average 4.526315789473684) internal successors, (86), 19 states have internal predecessors, (86), 5 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 60 [2022-12-14 11:56:29,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:56:29,969 INFO L225 Difference]: With dead ends: 330 [2022-12-14 11:56:29,969 INFO L226 Difference]: Without dead ends: 330 [2022-12-14 11:56:29,970 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 188 SyntacticMatches, 3 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 648 ImplicationChecksByTransitivity, 75.0s TimeCoverageRelationStatistics Valid=562, Invalid=2368, Unknown=40, NotChecked=0, Total=2970 [2022-12-14 11:56:29,970 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 522 mSDsluCounter, 421 mSDsCounter, 0 mSdLazyCounter, 980 mSolverCounterSat, 65 mSolverCounterUnsat, 24 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 522 SdHoareTripleChecker+Valid, 477 SdHoareTripleChecker+Invalid, 1069 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 980 IncrementalHoareTripleChecker+Invalid, 24 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-12-14 11:56:29,971 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [522 Valid, 477 Invalid, 1069 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 980 Invalid, 24 Unknown, 0 Unchecked, 2.8s Time] [2022-12-14 11:56:29,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2022-12-14 11:56:29,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 253. [2022-12-14 11:56:29,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 235 states have (on average 1.1361702127659574) internal successors, (267), 240 states have internal predecessors, (267), 6 states have call successors, (6), 6 states have call predecessors, (6), 9 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2022-12-14 11:56:29,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 282 transitions. [2022-12-14 11:56:29,978 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 282 transitions. Word has length 60 [2022-12-14 11:56:29,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:56:29,978 INFO L495 AbstractCegarLoop]: Abstraction has 253 states and 282 transitions. [2022-12-14 11:56:29,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 19 states have (on average 4.526315789473684) internal successors, (86), 19 states have internal predecessors, (86), 5 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-12-14 11:56:29,978 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 282 transitions. [2022-12-14 11:56:29,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-12-14 11:56:29,979 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:56:29,979 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:56:29,989 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (64)] Ended with exit code 0 [2022-12-14 11:56:30,189 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (65)] Ended with exit code 0 [2022-12-14 11:56:30,396 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2022-12-14 11:56:30,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:56:30,582 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-14 11:56:30,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:56:30,584 INFO L85 PathProgramCache]: Analyzing trace with hash -1476474522, now seen corresponding path program 1 times [2022-12-14 11:56:30,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:56:30,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [678386691] [2022-12-14 11:56:30,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:56:30,586 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 11:56:30,586 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:56:30,587 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 11:56:30,588 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (67)] Waiting until timeout for monitored process [2022-12-14 11:56:30,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:56:30,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 26 conjunts are in the unsatisfiable core [2022-12-14 11:56:30,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:56:31,417 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 11:56:31,417 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-12-14 11:56:32,070 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 11:56:32,288 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 11:56:32,288 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-12-14 11:56:33,594 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 11:56:33,601 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 11:56:33,806 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 11:56:33,806 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 47 treesize of output 69 [2022-12-14 11:56:33,960 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 13 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:56:33,961 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:56:34,762 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2022-12-14 11:56:34,896 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:56:34,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [678386691] [2022-12-14 11:56:34,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [678386691] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:56:34,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [701744054] [2022-12-14 11:56:34,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:56:34,897 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 11:56:34,897 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 11:56:34,898 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 11:56:34,899 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (68)] Waiting until timeout for monitored process [2022-12-14 11:56:35,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:56:35,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 32 conjunts are in the unsatisfiable core [2022-12-14 11:56:35,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:56:36,537 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 11:56:36,537 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-12-14 11:56:36,589 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-12-14 11:56:36,589 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 24 [2022-12-14 11:56:41,667 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 11:56:42,012 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 11:56:42,012 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-12-14 11:56:42,039 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 11:56:42,040 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 23 [2022-12-14 11:56:43,028 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 11:56:43,036 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 11:56:43,218 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-12-14 11:56:43,218 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 23 [2022-12-14 11:56:43,340 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 13 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:56:43,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:56:43,667 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2022-12-14 11:56:43,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [701744054] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:56:43,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753120200] [2022-12-14 11:56:43,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:56:43,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:56:43,872 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:56:43,873 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:56:43,874 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-12-14 11:56:43,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:56:43,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 26 conjunts are in the unsatisfiable core [2022-12-14 11:56:43,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:56:44,495 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 11:56:44,495 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-12-14 11:56:45,047 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 11:56:45,230 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 11:56:45,231 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-12-14 11:56:46,122 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 11:56:46,128 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-14 11:56:46,187 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 11:56:46,187 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 47 treesize of output 69 [2022-12-14 11:56:46,243 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 13 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:56:46,243 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:56:46,536 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2022-12-14 11:56:46,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [753120200] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 11:56:46,660 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 11:56:46,660 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 26 [2022-12-14 11:56:46,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320552817] [2022-12-14 11:56:46,660 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 11:56:46,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-12-14 11:56:46,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:56:46,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-12-14 11:56:46,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1019, Unknown=51, NotChecked=0, Total=1190 [2022-12-14 11:56:46,663 INFO L87 Difference]: Start difference. First operand 253 states and 282 transitions. Second operand has 28 states, 25 states have (on average 4.48) internal successors, (112), 23 states have internal predecessors, (112), 6 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-14 11:56:56,798 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 11:56:58,855 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 11:57:00,930 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 11:57:02,958 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 11:57:05,020 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 11:57:07,055 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 11:57:13,361 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 11:57:15,382 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 11:57:17,439 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 11:57:19,509 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 11:57:21,525 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 11:57:22,807 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 11:57:29,239 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 11:57:37,529 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 11:57:39,715 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 11:57:41,761 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 11:57:43,770 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 11:57:45,773 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 11:57:47,816 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 11:57:49,871 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 11:57:53,131 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 11:57:55,207 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 11:57:59,600 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 11:58:12,645 WARN L233 SmtUtils]: Spent 10.14s on a formula simplification. DAG size of input: 54 DAG size of output: 38 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 11:58:14,650 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 11:58:26,857 WARN L233 SmtUtils]: Spent 10.14s on a formula simplification. DAG size of input: 56 DAG size of output: 40 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 11:58:28,923 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 11:58:55,226 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 11:59:00,588 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-12-14 11:59:06,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:59:06,415 INFO L93 Difference]: Finished difference Result 292 states and 317 transitions. [2022-12-14 11:59:06,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-12-14 11:59:06,417 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 25 states have (on average 4.48) internal successors, (112), 23 states have internal predecessors, (112), 6 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 61 [2022-12-14 11:59:06,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:59:06,417 INFO L225 Difference]: With dead ends: 292 [2022-12-14 11:59:06,417 INFO L226 Difference]: Without dead ends: 292 [2022-12-14 11:59:06,418 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 189 SyntacticMatches, 3 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 905 ImplicationChecksByTransitivity, 89.4s TimeCoverageRelationStatistics Valid=686, Invalid=3133, Unknown=87, NotChecked=0, Total=3906 [2022-12-14 11:59:06,419 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 506 mSDsluCounter, 467 mSDsCounter, 0 mSdLazyCounter, 956 mSolverCounterSat, 88 mSolverCounterUnsat, 60 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 58.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 506 SdHoareTripleChecker+Valid, 515 SdHoareTripleChecker+Invalid, 1104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 956 IncrementalHoareTripleChecker+Invalid, 60 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 58.4s IncrementalHoareTripleChecker+Time [2022-12-14 11:59:06,419 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [506 Valid, 515 Invalid, 1104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 956 Invalid, 60 Unknown, 0 Unchecked, 58.4s Time] [2022-12-14 11:59:06,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2022-12-14 11:59:06,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 252. [2022-12-14 11:59:06,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 235 states have (on average 1.1319148936170214) internal successors, (266), 239 states have internal predecessors, (266), 6 states have call successors, (6), 6 states have call predecessors, (6), 9 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2022-12-14 11:59:06,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 281 transitions. [2022-12-14 11:59:06,422 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 281 transitions. Word has length 61 [2022-12-14 11:59:06,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:59:06,422 INFO L495 AbstractCegarLoop]: Abstraction has 252 states and 281 transitions. [2022-12-14 11:59:06,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 25 states have (on average 4.48) internal successors, (112), 23 states have internal predecessors, (112), 6 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-14 11:59:06,422 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 281 transitions. [2022-12-14 11:59:06,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-12-14 11:59:06,423 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:59:06,423 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:59:06,429 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2022-12-14 11:59:06,633 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (68)] Ended with exit code 0 [2022-12-14 11:59:06,838 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (67)] Ended with exit code 0 [2022-12-14 11:59:07,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 11:59:07,025 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting parse_inputErr18ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-14 11:59:07,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:59:07,026 INFO L85 PathProgramCache]: Analyzing trace with hash 586619876, now seen corresponding path program 1 times [2022-12-14 11:59:07,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:59:07,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [751512769] [2022-12-14 11:59:07,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:59:07,028 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 11:59:07,028 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:59:07,031 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 11:59:07,034 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (70)] Waiting until timeout for monitored process [2022-12-14 11:59:07,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:59:07,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-14 11:59:07,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:59:07,200 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2022-12-14 11:59:07,627 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 11:59:07,627 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 27 [2022-12-14 11:59:07,713 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 11:59:07,714 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-12-14 11:59:07,749 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 28 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:59:07,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:59:08,424 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 39 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:59:08,424 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:59:08,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [751512769] [2022-12-14 11:59:08,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [751512769] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:59:08,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [479353418] [2022-12-14 11:59:08,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:59:08,424 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-12-14 11:59:08,424 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/cvc4 [2022-12-14 11:59:08,425 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-12-14 11:59:08,426 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (71)] Waiting until timeout for monitored process [2022-12-14 11:59:08,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:59:08,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-14 11:59:08,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:59:08,847 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 7 [2022-12-14 11:59:09,161 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 11:59:09,161 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 27 [2022-12-14 11:59:09,240 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 11:59:09,240 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-12-14 11:59:09,273 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 28 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:59:09,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:59:09,850 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 39 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:59:09,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [479353418] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:59:09,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185270654] [2022-12-14 11:59:09,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:59:09,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:59:09,850 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 11:59:09,851 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 11:59:09,852 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-12-14 11:59:09,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:59:09,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-14 11:59:09,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:59:09,957 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 7 [2022-12-14 11:59:10,247 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 11:59:10,247 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 27 [2022-12-14 11:59:10,338 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 11:59:10,338 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-12-14 11:59:10,359 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 28 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:59:10,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 11:59:10,952 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 39 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 11:59:10,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [185270654] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 11:59:10,953 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-12-14 11:59:10,953 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7, 6, 7, 6] total 10 [2022-12-14 11:59:10,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524734925] [2022-12-14 11:59:10,953 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-12-14 11:59:10,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-14 11:59:10,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:59:10,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-14 11:59:10,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-12-14 11:59:10,954 INFO L87 Difference]: Start difference. First operand 252 states and 281 transitions. Second operand has 11 states, 10 states have (on average 8.3) internal successors, (83), 11 states have internal predecessors, (83), 2 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-12-14 11:59:11,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:59:11,658 INFO L93 Difference]: Finished difference Result 263 states and 291 transitions. [2022-12-14 11:59:11,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-14 11:59:11,659 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 8.3) internal successors, (83), 11 states have internal predecessors, (83), 2 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 66 [2022-12-14 11:59:11,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:59:11,660 INFO L225 Difference]: With dead ends: 263 [2022-12-14 11:59:11,660 INFO L226 Difference]: Without dead ends: 263 [2022-12-14 11:59:11,660 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 396 GetRequests, 367 SyntacticMatches, 15 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-12-14 11:59:11,661 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 43 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 11:59:11,661 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 187 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 11:59:11,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2022-12-14 11:59:11,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 207. [2022-12-14 11:59:11,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 194 states have (on average 1.1288659793814433) internal successors, (219), 196 states have internal predecessors, (219), 5 states have call successors, (5), 5 states have call predecessors, (5), 7 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-12-14 11:59:11,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 231 transitions. [2022-12-14 11:59:11,664 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 231 transitions. Word has length 66 [2022-12-14 11:59:11,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:59:11,664 INFO L495 AbstractCegarLoop]: Abstraction has 207 states and 231 transitions. [2022-12-14 11:59:11,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 8.3) internal successors, (83), 11 states have internal predecessors, (83), 2 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-12-14 11:59:11,664 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 231 transitions. [2022-12-14 11:59:11,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-12-14 11:59:11,665 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:59:11,665 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:59:11,669 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt (71)] Ended with exit code 0 [2022-12-14 11:59:11,896 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (70)] Ended with exit code 0 [2022-12-14 11:59:12,075 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2022-12-14 11:59:12,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/cvc4 --incremental --print-success --lang smt,70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 11:59:12,267 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-14 11:59:12,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:59:12,268 INFO L85 PathProgramCache]: Analyzing trace with hash 1008566956, now seen corresponding path program 1 times [2022-12-14 11:59:12,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:59:12,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [426021690] [2022-12-14 11:59:12,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:59:12,270 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 11:59:12,270 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:59:12,272 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 11:59:12,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (73)] Waiting until timeout for monitored process [2022-12-14 11:59:12,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 11:59:12,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 11:59:12,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 11:59:12,677 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2022-12-14 11:59:12,677 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 11:59:12,678 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-12-14 11:59:12,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [426021690] [2022-12-14 11:59:12,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [426021690] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 11:59:12,678 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 11:59:12,678 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 11:59:12,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085473844] [2022-12-14 11:59:12,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 11:59:12,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 11:59:12,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-12-14 11:59:12,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 11:59:12,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 11:59:12,679 INFO L87 Difference]: Start difference. First operand 207 states and 231 transitions. Second operand has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-14 11:59:12,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 11:59:12,769 INFO L93 Difference]: Finished difference Result 218 states and 241 transitions. [2022-12-14 11:59:12,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 11:59:12,770 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 67 [2022-12-14 11:59:12,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 11:59:12,771 INFO L225 Difference]: With dead ends: 218 [2022-12-14 11:59:12,771 INFO L226 Difference]: Without dead ends: 209 [2022-12-14 11:59:12,771 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 11:59:12,771 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 10 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 11:59:12,771 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 69 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 11:59:12,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2022-12-14 11:59:12,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 200. [2022-12-14 11:59:12,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 187 states have (on average 1.1176470588235294) internal successors, (209), 189 states have internal predecessors, (209), 5 states have call successors, (5), 5 states have call predecessors, (5), 7 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-12-14 11:59:12,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 221 transitions. [2022-12-14 11:59:12,774 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 221 transitions. Word has length 67 [2022-12-14 11:59:12,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 11:59:12,774 INFO L495 AbstractCegarLoop]: Abstraction has 200 states and 221 transitions. [2022-12-14 11:59:12,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-12-14 11:59:12,775 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 221 transitions. [2022-12-14 11:59:12,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-12-14 11:59:12,775 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 11:59:12,775 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:59:12,785 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (73)] Ended with exit code 0 [2022-12-14 11:59:12,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 11:59:12,977 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-12-14 11:59:12,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 11:59:12,978 INFO L85 PathProgramCache]: Analyzing trace with hash 272552823, now seen corresponding path program 1 times [2022-12-14 11:59:12,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-12-14 11:59:12,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1933294218] [2022-12-14 11:59:12,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 11:59:12,979 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 11:59:12,979 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/mathsat [2022-12-14 11:59:12,982 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-12-14 11:59:12,986 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (74)] Waiting until timeout for monitored process [2022-12-14 11:59:13,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-14 11:59:13,144 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-14 11:59:13,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-14 11:59:13,275 INFO L130 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2022-12-14 11:59:13,275 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-14 11:59:13,276 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK (19 of 20 remaining) [2022-12-14 11:59:13,277 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 20 remaining) [2022-12-14 11:59:13,277 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 20 remaining) [2022-12-14 11:59:13,277 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (16 of 20 remaining) [2022-12-14 11:59:13,278 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (15 of 20 remaining) [2022-12-14 11:59:13,278 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE (14 of 20 remaining) [2022-12-14 11:59:13,278 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE (13 of 20 remaining) [2022-12-14 11:59:13,278 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 20 remaining) [2022-12-14 11:59:13,278 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 20 remaining) [2022-12-14 11:59:13,278 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 20 remaining) [2022-12-14 11:59:13,278 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 20 remaining) [2022-12-14 11:59:13,278 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr10ASSERT_VIOLATIONMEMORY_FREE (8 of 20 remaining) [2022-12-14 11:59:13,278 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr11ASSERT_VIOLATIONMEMORY_FREE (7 of 20 remaining) [2022-12-14 11:59:13,278 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr12ASSERT_VIOLATIONMEMORY_FREE (6 of 20 remaining) [2022-12-14 11:59:13,278 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr13ASSERT_VIOLATIONMEMORY_FREE (5 of 20 remaining) [2022-12-14 11:59:13,279 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr14ASSERT_VIOLATIONMEMORY_FREE (4 of 20 remaining) [2022-12-14 11:59:13,279 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr15ASSERT_VIOLATIONMEMORY_FREE (3 of 20 remaining) [2022-12-14 11:59:13,279 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr16ASSERT_VIOLATIONMEMORY_FREE (2 of 20 remaining) [2022-12-14 11:59:13,279 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr17ASSERT_VIOLATIONMEMORY_FREE (1 of 20 remaining) [2022-12-14 11:59:13,279 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr18ASSERT_VIOLATIONMEMORY_FREE (0 of 20 remaining) [2022-12-14 11:59:13,292 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (74)] Ended with exit code 0 [2022-12-14 11:59:13,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/bin/utaipan-gh47qXpMRh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-12-14 11:59:13,486 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 11:59:13,488 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-12-14 11:59:13,528 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.12 11:59:13 BoogieIcfgContainer [2022-12-14 11:59:13,528 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-12-14 11:59:13,528 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-12-14 11:59:13,529 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-12-14 11:59:13,529 INFO L275 PluginConnector]: Witness Printer initialized [2022-12-14 11:59:13,529 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 11:48:44" (3/4) ... [2022-12-14 11:59:13,531 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-12-14 11:59:13,531 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-12-14 11:59:13,532 INFO L158 Benchmark]: Toolchain (without parser) took 629557.62ms. Allocated memory is still 90.2MB. Free memory was 68.0MB in the beginning and 43.4MB in the end (delta: 24.5MB). Peak memory consumption was 25.9MB. Max. memory is 16.1GB. [2022-12-14 11:59:13,532 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 58.7MB. Free memory is still 37.3MB. There was no memory consumed. Max. memory is 16.1GB. [2022-12-14 11:59:13,532 INFO L158 Benchmark]: CACSL2BoogieTranslator took 336.13ms. Allocated memory is still 90.2MB. Free memory was 67.7MB in the beginning and 47.3MB in the end (delta: 20.4MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. [2022-12-14 11:59:13,532 INFO L158 Benchmark]: Boogie Procedure Inliner took 44.98ms. Allocated memory is still 90.2MB. Free memory was 47.3MB in the beginning and 69.9MB in the end (delta: -22.6MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2022-12-14 11:59:13,532 INFO L158 Benchmark]: Boogie Preprocessor took 32.57ms. Allocated memory is still 90.2MB. Free memory was 69.9MB in the beginning and 68.3MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-14 11:59:13,532 INFO L158 Benchmark]: RCFGBuilder took 428.56ms. Allocated memory is still 90.2MB. Free memory was 68.3MB in the beginning and 49.9MB in the end (delta: 18.4MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2022-12-14 11:59:13,532 INFO L158 Benchmark]: TraceAbstraction took 628706.52ms. Allocated memory is still 90.2MB. Free memory was 48.9MB in the beginning and 44.2MB in the end (delta: 4.7MB). Peak memory consumption was 7.0MB. Max. memory is 16.1GB. [2022-12-14 11:59:13,532 INFO L158 Benchmark]: Witness Printer took 2.81ms. Allocated memory is still 90.2MB. Free memory was 44.2MB in the beginning and 43.4MB in the end (delta: 771.3kB). There was no memory consumed. Max. memory is 16.1GB. [2022-12-14 11:59:13,532 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 58.7MB. Free memory is still 37.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 336.13ms. Allocated memory is still 90.2MB. Free memory was 67.7MB in the beginning and 47.3MB in the end (delta: 20.4MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 44.98ms. Allocated memory is still 90.2MB. Free memory was 47.3MB in the beginning and 69.9MB in the end (delta: -22.6MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Boogie Preprocessor took 32.57ms. Allocated memory is still 90.2MB. Free memory was 69.9MB in the beginning and 68.3MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 428.56ms. Allocated memory is still 90.2MB. Free memory was 68.3MB in the beginning and 49.9MB in the end (delta: 18.4MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * TraceAbstraction took 628706.52ms. Allocated memory is still 90.2MB. Free memory was 48.9MB in the beginning and 44.2MB in the end (delta: 4.7MB). Peak memory consumption was 7.0MB. Max. memory is 16.1GB. * Witness Printer took 2.81ms. Allocated memory is still 90.2MB. Free memory was 44.2MB in the beginning and 43.4MB in the end (delta: 771.3kB). There was no memory consumed. 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 - UnprovableResult [Line: 721]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of strcmp at line 693. Possible FailurePath: [L685] int state = STATE_1; [L686] char *global = 0; [L687-L690] const struct command commands[] = { {"c1",c1,STATE_1}, {"c2",c2,STATE_2} }; VAL [commands={6:0}, global={0:0}, state=0] [L722] CALL parse_input("c1") VAL [\old(global)={0:0}, \old(state)=0, commands={6:0}, global={0:0}, state=0] [L692] int i = 0; VAL [\old(global)={0:0}, \old(state)=0, commands={6:0}, global={0:0}, i=0, input={3:0}, input={3:0}, state=0] [L692] COND TRUE i < 2 VAL [\old(global)={0:0}, \old(state)=0, commands={6:0}, global={0:0}, i=0, input={3:0}, input={3:0}, state=0] [L693] EXPR commands[i].name VAL [\old(global)={0:0}, \old(state)=0, commands={6:0}, commands[i].name={1:0}, global={0:0}, i=0, input={3:0}, input={3:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)={0:0}, \old(state)=0, commands={6:0}, commands[i].name={1:0}, global={0:0}, i=0, input={3:0}, input={3:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)={0:0}, \old(state)=0, commands={6:0}, commands[i].name={1:0}, global={0:0}, i=0, input={3:0}, input={3:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)={0:0}, \old(state)=0, commands={6:0}, commands[i].name={1:0}, global={0:0}, i=0, input={3:0}, input={3:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)={0:0}, \old(state)=0, commands={6:0}, commands[i].name={1:0}, global={0:0}, i=0, input={3:0}, input={3:0}, state=0] [L693] COND FALSE !(strcmp(commands[i].name,input) == 0) [L692] i++ VAL [\old(global)={0:0}, \old(state)=0, commands={6:0}, global={0:0}, i=1, input={3:0}, input={3:0}, state=0] [L692] COND TRUE i < 2 VAL [\old(global)={0:0}, \old(state)=0, commands={6:0}, global={0:0}, i=1, input={3:0}, input={3:0}, state=0] [L693] EXPR commands[i].name VAL [\old(global)={0:0}, \old(state)=0, commands={6:0}, commands[i].name={2:0}, global={0:0}, i=1, input={3:0}, input={3:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)={0:0}, \old(state)=0, commands={6:0}, commands[i].name={2:0}, global={0:0}, i=1, input={3:0}, input={3:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)={0:0}, \old(state)=0, commands={6:0}, commands[i].name={2:0}, global={0:0}, i=1, input={3:0}, input={3:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)={0:0}, \old(state)=0, commands={6:0}, commands[i].name={2:0}, global={0:0}, i=1, input={3:0}, input={3:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)={0:0}, \old(state)=0, commands={6:0}, commands[i].name={2:0}, global={0:0}, i=1, input={3:0}, input={3:0}, state=0] [L693] COND FALSE !(strcmp(commands[i].name,input) == 0) [L692] i++ VAL [\old(global)={0:0}, \old(state)=0, commands={6:0}, global={0:0}, i=2, input={3:0}, input={3:0}, state=0] [L692] COND FALSE !(i < 2) VAL [\old(global)={0:0}, \old(state)=0, commands={6:0}, global={0:0}, i=2, input={3:0}, input={3:0}, state=0] [L722] RET parse_input("c1") VAL [commands={6:0}, global={0:0}, state=0] [L723] CALL parse_input("c1") VAL [\old(global)={0:0}, \old(state)=0, commands={6:0}, global={0:0}, state=0] [L692] int i = 0; VAL [\old(global)={0:0}, \old(state)=0, commands={6:0}, global={0:0}, i=0, input={4:0}, input={4:0}, state=0] [L692] COND TRUE i < 2 VAL [\old(global)={0:0}, \old(state)=0, commands={6:0}, global={0:0}, i=0, input={4:0}, input={4:0}, state=0] [L693] EXPR commands[i].name VAL [\old(global)={0:0}, \old(state)=0, commands={6:0}, commands[i].name={1:0}, global={0:0}, i=0, input={4:0}, input={4:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)={0:0}, \old(state)=0, commands={6:0}, commands[i].name={1:0}, global={0:0}, i=0, input={4:0}, input={4:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)={0:0}, \old(state)=0, commands={6:0}, commands[i].name={1:0}, global={0:0}, i=0, input={4:0}, input={4:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)={0:0}, \old(state)=0, commands={6:0}, commands[i].name={1:0}, global={0:0}, i=0, input={4:0}, input={4:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)={0:0}, \old(state)=0, commands={6:0}, commands[i].name={1:0}, global={0:0}, i=0, input={4:0}, input={4:0}, state=0] [L693] COND FALSE !(strcmp(commands[i].name,input) == 0) [L692] i++ VAL [\old(global)={0:0}, \old(state)=0, commands={6:0}, global={0:0}, i=1, input={4:0}, input={4:0}, state=0] [L692] COND TRUE i < 2 VAL [\old(global)={0:0}, \old(state)=0, commands={6:0}, global={0:0}, i=1, input={4:0}, input={4:0}, state=0] [L693] EXPR commands[i].name VAL [\old(global)={0:0}, \old(state)=0, commands={6:0}, commands[i].name={2:0}, global={0:0}, i=1, input={4:0}, input={4:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)={0:0}, \old(state)=0, commands={6:0}, commands[i].name={2:0}, global={0:0}, i=1, input={4:0}, input={4:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)={0:0}, \old(state)=0, commands={6:0}, commands[i].name={2:0}, global={0:0}, i=1, input={4:0}, input={4:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)={0:0}, \old(state)=0, commands={6:0}, commands[i].name={2:0}, global={0:0}, i=1, input={4:0}, input={4:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)={0:0}, \old(state)=0, commands={6:0}, commands[i].name={2:0}, global={0:0}, i=1, input={4:0}, input={4:0}, state=0] [L693] COND FALSE !(strcmp(commands[i].name,input) == 0) [L692] i++ VAL [\old(global)={0:0}, \old(state)=0, commands={6:0}, global={0:0}, i=2, input={4:0}, input={4:0}, state=0] [L692] COND FALSE !(i < 2) VAL [\old(global)={0:0}, \old(state)=0, commands={6:0}, global={0:0}, i=2, input={4:0}, input={4:0}, state=0] [L723] RET parse_input("c1") VAL [commands={6:0}, global={0:0}, state=0] [L724] CALL parse_input("c2") VAL [\old(global)={0:0}, \old(state)=0, commands={6:0}, global={0:0}, state=0] [L692] int i = 0; VAL [\old(global)={0:0}, \old(state)=0, commands={6:0}, global={0:0}, i=0, input={5:0}, input={5:0}, state=0] [L692] COND TRUE i < 2 VAL [\old(global)={0:0}, \old(state)=0, commands={6:0}, global={0:0}, i=0, input={5:0}, input={5:0}, state=0] [L693] EXPR commands[i].name VAL [\old(global)={0:0}, \old(state)=0, commands={6:0}, commands[i].name={1:0}, global={0:0}, i=0, input={5:0}, input={5:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)={0:0}, \old(state)=0, commands={6:0}, commands[i].name={1:0}, global={0:0}, i=0, input={5:0}, input={5:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)={0:0}, \old(state)=0, commands={6:0}, commands[i].name={1:0}, global={0:0}, i=0, input={5:0}, input={5:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)={0:0}, \old(state)=0, commands={6:0}, commands[i].name={1:0}, global={0:0}, i=0, input={5:0}, input={5:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)={0:0}, \old(state)=0, commands={6:0}, commands[i].name={1:0}, global={0:0}, i=0, input={5:0}, input={5:0}, state=0] [L693] COND TRUE strcmp(commands[i].name,input) == 0 [L694] EXPR commands[i].state_needed VAL [\old(global)={0:0}, \old(state)=0, commands={6:0}, commands[i].state_needed=0, global={0:0}, i=0, input={5:0}, input={5:0}, state=0] [L694] COND TRUE state >= commands[i].state_needed [L695] EXPR commands[i].function VAL [\old(global)={0:0}, \old(state)=0, commands={6:0}, commands[i].function={-1:0}, global={0:0}, i=0, input={5:0}, input={5:0}, state=0] [L695] CALL commands[i].function() [L702] char *x = (char *)malloc(sizeof(char)); [L703] COND FALSE !(!x) VAL [\old(global)={0:0}, \old(state)=0, commands={6:0}, global={0:0}, state=0, x={7:0}] [L706] COND FALSE !(\read(*global)) VAL [\old(global)={0:0}, \old(state)=0, commands={6:0}, global={0:0}, state=0, x={7:0}] [L709] global = x [L710] state = STATE_2 VAL [\old(global)={0:0}, \old(state)=0, commands={6:0}, global={7:0}, state=1, x={7:0}] [L695] RET commands[i].function() [L724] RET parse_input("c2") VAL [commands={6:0}, global={7:0}, state=1] [L725] return 0; VAL [\result=0, commands={6:0}, global={7:0}, state=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: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 693]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 693]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 693]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 693]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 717]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 717]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 717]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 718]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 718]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 718]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 707]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 707]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 707]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 61 locations, 20 error locations. Started 1 CEGAR loops. OverallTime: 628.6s, OverallIterations: 32, TraceHistogramMax: 6, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 445.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 213 mSolverCounterUnknown, 8645 SdHoareTripleChecker+Valid, 120.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 8645 mSDsluCounter, 7661 SdHoareTripleChecker+Invalid, 118.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 380 IncrementalHoareTripleChecker+Unchecked, 5760 mSDsCounter, 972 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 6699 IncrementalHoareTripleChecker+Invalid, 8264 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 972 mSolverCounterUnsat, 1901 mSDtfsCounter, 6699 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 213 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 4506 GetRequests, 3890 SyntacticMatches, 54 SemanticMatches, 562 ConstructedPredicates, 4 IntricatePredicates, 1 DeprecatedPredicates, 4826 ImplicationChecksByTransitivity, 440.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=422occurred in iteration=9, InterpolantAutomatonStates: 360, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 31 MinimizatonAttempts, 1995 StatesRemovedByMinimization, 30 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.6s SsaConstructionTime, 5.3s SatisfiabilityAnalysisTime, 159.2s InterpolantComputationTime, 2707 NumberOfCodeBlocks, 2707 NumberOfCodeBlocksAsserted, 76 NumberOfCheckSat, 4081 ConstructedInterpolants, 393 QuantifiedInterpolants, 48540 SizeOfPredicates, 300 NumberOfNonLiveVariables, 10740 ConjunctsInSsa, 891 ConjunctsInUnsatCore, 115 InterpolantComputations, 11 PerfectInterpolantSequences, 1599/2889 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 could not prove your program: unable to determine feasibility of some traces [2022-12-14 11:59:13,619 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_dc033242-ed9f-4625-b471-5c7de210d0c4/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 Result: UNKNOWN: Overapproximated counterexample