./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 b5237d83 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_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-bftpd/bftpd_2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/config/svcomp-MemCleanup-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-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-b5237d8 [2022-11-22 02:13:06,093 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-22 02:13:06,096 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-22 02:13:06,130 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-22 02:13:06,134 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-22 02:13:06,136 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-22 02:13:06,139 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-22 02:13:06,142 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-22 02:13:06,145 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-22 02:13:06,150 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-22 02:13:06,152 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-22 02:13:06,153 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-22 02:13:06,156 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-22 02:13:06,158 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-22 02:13:06,160 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-22 02:13:06,162 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-22 02:13:06,164 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-22 02:13:06,165 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-22 02:13:06,167 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-22 02:13:06,173 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-22 02:13:06,175 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-22 02:13:06,177 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-22 02:13:06,179 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-22 02:13:06,180 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-22 02:13:06,190 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-22 02:13:06,190 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-22 02:13:06,191 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-22 02:13:06,193 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-22 02:13:06,193 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-22 02:13:06,194 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-22 02:13:06,195 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-22 02:13:06,196 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-22 02:13:06,198 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-22 02:13:06,200 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-22 02:13:06,202 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-22 02:13:06,202 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-22 02:13:06,203 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-22 02:13:06,204 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-22 02:13:06,204 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-22 02:13:06,205 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-22 02:13:06,206 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-22 02:13:06,207 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/config/svcomp-MemCleanup-32bit-Taipan_Default.epf [2022-11-22 02:13:06,248 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-22 02:13:06,248 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-22 02:13:06,249 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-22 02:13:06,249 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-22 02:13:06,250 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-22 02:13:06,251 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-22 02:13:06,251 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-22 02:13:06,251 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-22 02:13:06,251 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-22 02:13:06,252 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-22 02:13:06,253 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-22 02:13:06,253 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-22 02:13:06,253 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-22 02:13:06,253 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-22 02:13:06,254 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-22 02:13:06,254 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-22 02:13:06,254 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-22 02:13:06,254 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-22 02:13:06,255 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-22 02:13:06,255 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-22 02:13:06,256 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-22 02:13:06,256 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-22 02:13:06,256 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-22 02:13:06,256 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-22 02:13:06,257 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-22 02:13:06,257 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-22 02:13:06,258 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-22 02:13:06,258 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-22 02:13:06,258 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-22 02:13:06,259 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-22 02:13:06,259 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-22 02:13:06,259 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-22 02:13:06,259 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-22 02:13:06,260 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-22 02:13:06,260 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 02:13:06,260 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-22 02:13:06,260 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-22 02:13:06,260 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-22 02:13:06,261 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-22 02:13:06,261 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-22 02:13:06,261 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-22 02:13:06,261 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_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-memcleanup) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7c883b81b24ce5a721aa9a1ff13aef8a0d532ba87d9e130e470a0b88a1f8e93e [2022-11-22 02:13:06,558 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-22 02:13:06,589 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-22 02:13:06,591 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-22 02:13:06,592 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-22 02:13:06,593 INFO L275 PluginConnector]: CDTParser initialized [2022-11-22 02:13:06,594 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/../../sv-benchmarks/c/memsafety-bftpd/bftpd_2.i [2022-11-22 02:13:09,640 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-22 02:13:09,986 INFO L351 CDTParser]: Found 1 translation units. [2022-11-22 02:13:09,987 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/sv-benchmarks/c/memsafety-bftpd/bftpd_2.i [2022-11-22 02:13:10,011 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/data/b8a195b6b/547c07148f6b4318b29bc515dd95b52f/FLAG0ffa69a5e [2022-11-22 02:13:10,029 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/data/b8a195b6b/547c07148f6b4318b29bc515dd95b52f [2022-11-22 02:13:10,032 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-22 02:13:10,034 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-22 02:13:10,037 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-22 02:13:10,037 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-22 02:13:10,040 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-22 02:13:10,041 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 02:13:10" (1/1) ... [2022-11-22 02:13:10,042 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ca9e7b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:13:10, skipping insertion in model container [2022-11-22 02:13:10,043 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 02:13:10" (1/1) ... [2022-11-22 02:13:10,050 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-22 02:13:10,100 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-22 02:13:10,509 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 02:13:10,519 INFO L203 MainTranslator]: Completed pre-run [2022-11-22 02:13:10,582 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 02:13:10,625 INFO L208 MainTranslator]: Completed translation [2022-11-22 02:13:10,626 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:13:10 WrapperNode [2022-11-22 02:13:10,626 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-22 02:13:10,627 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-22 02:13:10,628 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-22 02:13:10,628 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-22 02:13:10,635 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:13:10" (1/1) ... [2022-11-22 02:13:10,650 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:13:10" (1/1) ... [2022-11-22 02:13:10,672 INFO L138 Inliner]: procedures = 168, calls = 42, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 95 [2022-11-22 02:13:10,672 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-22 02:13:10,673 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-22 02:13:10,673 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-22 02:13:10,673 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-22 02:13:10,683 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:13:10" (1/1) ... [2022-11-22 02:13:10,683 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:13:10" (1/1) ... [2022-11-22 02:13:10,686 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:13:10" (1/1) ... [2022-11-22 02:13:10,687 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:13:10" (1/1) ... [2022-11-22 02:13:10,694 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:13:10" (1/1) ... [2022-11-22 02:13:10,698 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:13:10" (1/1) ... [2022-11-22 02:13:10,699 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:13:10" (1/1) ... [2022-11-22 02:13:10,700 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:13:10" (1/1) ... [2022-11-22 02:13:10,703 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-22 02:13:10,703 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-22 02:13:10,704 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-22 02:13:10,704 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-22 02:13:10,704 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:13:10" (1/1) ... [2022-11-22 02:13:10,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 02:13:10,723 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:13:10,734 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-22 02:13:10,763 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-22 02:13:10,785 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-22 02:13:10,787 INFO L130 BoogieDeclarations]: Found specification of procedure parse_input [2022-11-22 02:13:10,787 INFO L138 BoogieDeclarations]: Found implementation of procedure parse_input [2022-11-22 02:13:10,787 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-22 02:13:10,787 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-22 02:13:10,787 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-22 02:13:10,788 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-22 02:13:10,788 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-22 02:13:10,788 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-22 02:13:10,788 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-22 02:13:10,788 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-22 02:13:10,979 INFO L235 CfgBuilder]: Building ICFG [2022-11-22 02:13:10,985 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-22 02:13:11,217 INFO L276 CfgBuilder]: Performing block encoding [2022-11-22 02:13:11,267 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-22 02:13:11,267 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-22 02:13:11,270 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:13:11 BoogieIcfgContainer [2022-11-22 02:13:11,270 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-22 02:13:11,273 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-22 02:13:11,273 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-22 02:13:11,280 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-22 02:13:11,280 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 02:13:10" (1/3) ... [2022-11-22 02:13:11,283 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ac5c8be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 02:13:11, skipping insertion in model container [2022-11-22 02:13:11,301 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:13:10" (2/3) ... [2022-11-22 02:13:11,301 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ac5c8be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 02:13:11, skipping insertion in model container [2022-11-22 02:13:11,301 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:13:11" (3/3) ... [2022-11-22 02:13:11,303 INFO L112 eAbstractionObserver]: Analyzing ICFG bftpd_2.i [2022-11-22 02:13:11,330 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-22 02:13:11,331 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 20 error locations. [2022-11-22 02:13:11,408 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-22 02:13:11,416 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;@27112da9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-22 02:13:11,416 INFO L358 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2022-11-22 02:13:11,420 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) [2022-11-22 02:13:11,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-22 02:13:11,426 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:13:11,426 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-22 02:13:11,427 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)] === [2022-11-22 02:13:11,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:13:11,431 INFO L85 PathProgramCache]: Analyzing trace with hash 130425256, now seen corresponding path program 1 times [2022-11-22 02:13:11,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:13:11,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924094442] [2022-11-22 02:13:11,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:13:11,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:13:11,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:13:11,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:13:11,846 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:13:11,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924094442] [2022-11-22 02:13:11,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924094442] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:13:11,847 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:13:11,848 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-22 02:13:11,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740482249] [2022-11-22 02:13:11,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:13:11,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 02:13:11,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:13:11,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 02:13:11,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-22 02:13:11,903 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) [2022-11-22 02:13:12,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:13:12,075 INFO L93 Difference]: Finished difference Result 118 states and 139 transitions. [2022-11-22 02:13:12,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 02:13:12,081 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 [2022-11-22 02:13:12,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:13:12,094 INFO L225 Difference]: With dead ends: 118 [2022-11-22 02:13:12,095 INFO L226 Difference]: Without dead ends: 115 [2022-11-22 02:13:12,097 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 [2022-11-22 02:13:12,102 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 101 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:13:12,104 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 112 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:13:12,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-11-22 02:13:12,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 89. [2022-11-22 02:13:12,166 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) [2022-11-22 02:13:12,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 120 transitions. [2022-11-22 02:13:12,180 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 120 transitions. Word has length 5 [2022-11-22 02:13:12,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:13:12,181 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 120 transitions. [2022-11-22 02:13:12,181 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) [2022-11-22 02:13:12,182 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 120 transitions. [2022-11-22 02:13:12,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-22 02:13:12,182 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:13:12,182 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-22 02:13:12,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-22 02:13:12,184 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)] === [2022-11-22 02:13:12,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:13:12,185 INFO L85 PathProgramCache]: Analyzing trace with hash 130425257, now seen corresponding path program 1 times [2022-11-22 02:13:12,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:13:12,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105602233] [2022-11-22 02:13:12,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:13:12,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:13:12,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:13:12,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:13:12,510 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:13:12,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105602233] [2022-11-22 02:13:12,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105602233] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:13:12,510 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:13:12,511 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 02:13:12,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363738752] [2022-11-22 02:13:12,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:13:12,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 02:13:12,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:13:12,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 02:13:12,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-22 02:13:12,513 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) [2022-11-22 02:13:12,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:13:12,722 INFO L93 Difference]: Finished difference Result 214 states and 301 transitions. [2022-11-22 02:13:12,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 02:13:12,723 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 [2022-11-22 02:13:12,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:13:12,726 INFO L225 Difference]: With dead ends: 214 [2022-11-22 02:13:12,728 INFO L226 Difference]: Without dead ends: 214 [2022-11-22 02:13:12,729 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-11-22 02:13:12,731 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 117 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:13:12,734 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 197 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:13:12,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2022-11-22 02:13:12,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 163. [2022-11-22 02:13:12,754 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) [2022-11-22 02:13:12,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 256 transitions. [2022-11-22 02:13:12,765 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 256 transitions. Word has length 5 [2022-11-22 02:13:12,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:13:12,766 INFO L495 AbstractCegarLoop]: Abstraction has 163 states and 256 transitions. [2022-11-22 02:13:12,767 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) [2022-11-22 02:13:12,767 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 256 transitions. [2022-11-22 02:13:12,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-22 02:13:12,768 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:13:12,768 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-22 02:13:12,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-22 02:13:12,769 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)] === [2022-11-22 02:13:12,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:13:12,770 INFO L85 PathProgramCache]: Analyzing trace with hash -251784379, now seen corresponding path program 1 times [2022-11-22 02:13:12,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:13:12,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167562694] [2022-11-22 02:13:12,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:13:12,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:13:12,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:13:13,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:13:13,074 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:13:13,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167562694] [2022-11-22 02:13:13,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167562694] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:13:13,075 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:13:13,075 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 02:13:13,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872588810] [2022-11-22 02:13:13,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:13:13,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 02:13:13,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:13:13,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 02:13:13,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-22 02:13:13,077 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) [2022-11-22 02:13:13,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:13:13,329 INFO L93 Difference]: Finished difference Result 237 states and 341 transitions. [2022-11-22 02:13:13,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 02:13:13,330 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 [2022-11-22 02:13:13,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:13:13,332 INFO L225 Difference]: With dead ends: 237 [2022-11-22 02:13:13,332 INFO L226 Difference]: Without dead ends: 237 [2022-11-22 02:13:13,333 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-22 02:13:13,334 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 134 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 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, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 02:13:13,334 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 154 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 02:13:13,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2022-11-22 02:13:13,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 166. [2022-11-22 02:13:13,351 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) [2022-11-22 02:13:13,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 259 transitions. [2022-11-22 02:13:13,353 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 259 transitions. Word has length 6 [2022-11-22 02:13:13,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:13:13,353 INFO L495 AbstractCegarLoop]: Abstraction has 166 states and 259 transitions. [2022-11-22 02:13:13,353 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) [2022-11-22 02:13:13,353 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 259 transitions. [2022-11-22 02:13:13,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-22 02:13:13,354 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:13:13,354 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:13:13,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-22 02:13:13,354 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)] === [2022-11-22 02:13:13,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:13:13,355 INFO L85 PathProgramCache]: Analyzing trace with hash 784618888, now seen corresponding path program 1 times [2022-11-22 02:13:13,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:13:13,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482971566] [2022-11-22 02:13:13,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:13:13,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:13:13,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:13:13,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:13:13,622 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:13:13,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482971566] [2022-11-22 02:13:13,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482971566] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:13:13,623 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:13:13,623 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 02:13:13,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069289131] [2022-11-22 02:13:13,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:13:13,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 02:13:13,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:13:13,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 02:13:13,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-22 02:13:13,625 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) [2022-11-22 02:13:13,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:13:13,791 INFO L93 Difference]: Finished difference Result 216 states and 302 transitions. [2022-11-22 02:13:13,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 02:13:13,792 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 [2022-11-22 02:13:13,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:13:13,793 INFO L225 Difference]: With dead ends: 216 [2022-11-22 02:13:13,794 INFO L226 Difference]: Without dead ends: 216 [2022-11-22 02:13:13,794 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-22 02:13:13,795 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 119 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 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 [2022-11-22 02:13:13,796 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 175 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:13:13,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2022-11-22 02:13:13,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 166. [2022-11-22 02:13:13,806 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) [2022-11-22 02:13:13,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 257 transitions. [2022-11-22 02:13:13,808 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 257 transitions. Word has length 7 [2022-11-22 02:13:13,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:13:13,808 INFO L495 AbstractCegarLoop]: Abstraction has 166 states and 257 transitions. [2022-11-22 02:13:13,809 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) [2022-11-22 02:13:13,809 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 257 transitions. [2022-11-22 02:13:13,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-22 02:13:13,809 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:13:13,809 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:13:13,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-22 02:13:13,810 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)] === [2022-11-22 02:13:13,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:13:13,810 INFO L85 PathProgramCache]: Analyzing trace with hash -1446618201, now seen corresponding path program 1 times [2022-11-22 02:13:13,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:13:13,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377392534] [2022-11-22 02:13:13,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:13:13,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:13:13,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:13:13,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:13:13,883 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:13:13,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377392534] [2022-11-22 02:13:13,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377392534] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:13:13,883 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:13:13,884 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 02:13:13,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204993515] [2022-11-22 02:13:13,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:13:13,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 02:13:13,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:13:13,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 02:13:13,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-22 02:13:13,885 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) [2022-11-22 02:13:14,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:13:14,018 INFO L93 Difference]: Finished difference Result 244 states and 338 transitions. [2022-11-22 02:13:14,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 02:13:14,019 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 [2022-11-22 02:13:14,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:13:14,021 INFO L225 Difference]: With dead ends: 244 [2022-11-22 02:13:14,021 INFO L226 Difference]: Without dead ends: 244 [2022-11-22 02:13:14,022 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 [2022-11-22 02:13:14,023 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 175 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 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 [2022-11-22 02:13:14,028 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [175 Valid, 160 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:13:14,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2022-11-22 02:13:14,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 201. [2022-11-22 02:13:14,049 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) [2022-11-22 02:13:14,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 306 transitions. [2022-11-22 02:13:14,051 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 306 transitions. Word has length 8 [2022-11-22 02:13:14,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:13:14,052 INFO L495 AbstractCegarLoop]: Abstraction has 201 states and 306 transitions. [2022-11-22 02:13:14,052 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) [2022-11-22 02:13:14,052 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 306 transitions. [2022-11-22 02:13:14,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-22 02:13:14,053 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:13:14,053 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:13:14,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-22 02:13:14,053 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)] === [2022-11-22 02:13:14,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:13:14,054 INFO L85 PathProgramCache]: Analyzing trace with hash -1895491222, now seen corresponding path program 1 times [2022-11-22 02:13:14,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:13:14,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312932054] [2022-11-22 02:13:14,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:13:14,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:13:14,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:13:14,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:13:14,195 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:13:14,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312932054] [2022-11-22 02:13:14,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312932054] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:13:14,196 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:13:14,196 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 02:13:14,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858256512] [2022-11-22 02:13:14,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:13:14,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 02:13:14,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:13:14,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 02:13:14,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-22 02:13:14,199 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) [2022-11-22 02:13:14,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:13:14,325 INFO L93 Difference]: Finished difference Result 239 states and 321 transitions. [2022-11-22 02:13:14,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 02:13:14,327 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 [2022-11-22 02:13:14,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:13:14,328 INFO L225 Difference]: With dead ends: 239 [2022-11-22 02:13:14,328 INFO L226 Difference]: Without dead ends: 239 [2022-11-22 02:13:14,329 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 [2022-11-22 02:13:14,332 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 156 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 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 [2022-11-22 02:13:14,332 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [156 Valid, 182 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:13:14,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2022-11-22 02:13:14,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 211. [2022-11-22 02:13:14,340 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) [2022-11-22 02:13:14,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 319 transitions. [2022-11-22 02:13:14,342 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 319 transitions. Word has length 9 [2022-11-22 02:13:14,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:13:14,342 INFO L495 AbstractCegarLoop]: Abstraction has 211 states and 319 transitions. [2022-11-22 02:13:14,343 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) [2022-11-22 02:13:14,343 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 319 transitions. [2022-11-22 02:13:14,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-22 02:13:14,343 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:13:14,344 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:13:14,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-22 02:13:14,344 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)] === [2022-11-22 02:13:14,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:13:14,345 INFO L85 PathProgramCache]: Analyzing trace with hash -354750800, now seen corresponding path program 1 times [2022-11-22 02:13:14,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:13:14,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897209250] [2022-11-22 02:13:14,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:13:14,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:13:14,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:13:14,529 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:13:14,529 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:13:14,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897209250] [2022-11-22 02:13:14,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897209250] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:13:14,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633630014] [2022-11-22 02:13:14,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:13:14,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:13:14,531 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:13:14,535 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:13:14,544 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-22 02:13:14,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:13:14,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-22 02:13:14,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:13:14,845 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:13:14,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:13:14,974 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:13:14,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [633630014] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:13:14,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [183256332] [2022-11-22 02:13:14,995 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-11-22 02:13:14,995 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:13:15,000 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:13:15,005 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:13:15,005 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:13:15,091 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 157 for LOIs [2022-11-22 02:13:17,711 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:13:21,274 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 [2022-11-22 02:13:21,275 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:13:21,275 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:13:21,275 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3, 3] total 11 [2022-11-22 02:13:21,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447431793] [2022-11-22 02:13:21,276 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 02:13:21,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-22 02:13:21,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:13:21,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-22 02:13:21,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2022-11-22 02:13:21,277 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) [2022-11-22 02:13:21,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:13:21,621 INFO L93 Difference]: Finished difference Result 293 states and 406 transitions. [2022-11-22 02:13:21,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-22 02:13:21,622 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 [2022-11-22 02:13:21,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:13:21,631 INFO L225 Difference]: With dead ends: 293 [2022-11-22 02:13:21,631 INFO L226 Difference]: Without dead ends: 293 [2022-11-22 02:13:21,632 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2022-11-22 02:13:21,633 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 406 mSDsluCounter, 292 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 406 SdHoareTripleChecker+Valid, 381 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 02:13:21,633 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [406 Valid, 381 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 02:13:21,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2022-11-22 02:13:21,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 223. [2022-11-22 02:13:21,644 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) [2022-11-22 02:13:21,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 329 transitions. [2022-11-22 02:13:21,646 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 329 transitions. Word has length 13 [2022-11-22 02:13:21,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:13:21,646 INFO L495 AbstractCegarLoop]: Abstraction has 223 states and 329 transitions. [2022-11-22 02:13:21,646 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) [2022-11-22 02:13:21,646 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 329 transitions. [2022-11-22 02:13:21,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-22 02:13:21,647 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:13:21,647 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:13:21,660 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-22 02:13:21,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-22 02:13:21,853 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)] === [2022-11-22 02:13:21,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:13:21,854 INFO L85 PathProgramCache]: Analyzing trace with hash 1887627038, now seen corresponding path program 1 times [2022-11-22 02:13:21,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:13:21,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112957831] [2022-11-22 02:13:21,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:13:21,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:13:21,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:13:22,049 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:13:22,050 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:13:22,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112957831] [2022-11-22 02:13:22,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112957831] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:13:22,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204961288] [2022-11-22 02:13:22,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:13:22,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:13:22,051 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:13:22,052 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:13:22,075 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-22 02:13:22,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:13:22,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-22 02:13:22,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:13:22,350 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 [2022-11-22 02:13:22,359 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:13:22,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:13:22,435 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:13:22,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [204961288] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:13:22,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [949780367] [2022-11-22 02:13:22,437 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-11-22 02:13:22,437 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:13:22,438 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:13:22,438 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:13:22,438 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:13:22,470 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 157 for LOIs [2022-11-22 02:13:24,541 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:13:28,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [949780367] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:13:28,998 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:13:28,998 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5, 4, 4] total 18 [2022-11-22 02:13:28,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247664768] [2022-11-22 02:13:28,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:13:28,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-22 02:13:29,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:13:29,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-22 02:13:29,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2022-11-22 02:13:29,001 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) [2022-11-22 02:13:30,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:13:30,077 INFO L93 Difference]: Finished difference Result 211 states and 290 transitions. [2022-11-22 02:13:30,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-22 02:13:30,079 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 [2022-11-22 02:13:30,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:13:30,080 INFO L225 Difference]: With dead ends: 211 [2022-11-22 02:13:30,080 INFO L226 Difference]: Without dead ends: 211 [2022-11-22 02:13:30,081 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 22 SyntacticMatches, 6 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2022-11-22 02:13:30,082 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 45 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 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, 0.5s IncrementalHoareTripleChecker+Time [2022-11-22 02:13:30,082 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 129 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-22 02:13:30,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2022-11-22 02:13:30,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 205. [2022-11-22 02:13:30,088 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) [2022-11-22 02:13:30,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 284 transitions. [2022-11-22 02:13:30,090 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 284 transitions. Word has length 14 [2022-11-22 02:13:30,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:13:30,090 INFO L495 AbstractCegarLoop]: Abstraction has 205 states and 284 transitions. [2022-11-22 02:13:30,090 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) [2022-11-22 02:13:30,090 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 284 transitions. [2022-11-22 02:13:30,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-22 02:13:30,091 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:13:30,091 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] [2022-11-22 02:13:30,103 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-22 02:13:30,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:13:30,304 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)] === [2022-11-22 02:13:30,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:13:30,304 INFO L85 PathProgramCache]: Analyzing trace with hash 351522922, now seen corresponding path program 1 times [2022-11-22 02:13:30,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:13:30,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558634396] [2022-11-22 02:13:30,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:13:30,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:13:30,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:13:30,346 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:13:30,347 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:13:30,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558634396] [2022-11-22 02:13:30,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558634396] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:13:30,347 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:13:30,347 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 02:13:30,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678213439] [2022-11-22 02:13:30,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:13:30,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:13:30,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:13:30,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:13:30,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:13:30,349 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) [2022-11-22 02:13:30,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:13:30,362 INFO L93 Difference]: Finished difference Result 211 states and 288 transitions. [2022-11-22 02:13:30,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:13:30,363 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 [2022-11-22 02:13:30,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:13:30,364 INFO L225 Difference]: With dead ends: 211 [2022-11-22 02:13:30,365 INFO L226 Difference]: Without dead ends: 211 [2022-11-22 02:13:30,365 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 [2022-11-22 02:13:30,368 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 [2022-11-22 02:13:30,368 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] [2022-11-22 02:13:30,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2022-11-22 02:13:30,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 205. [2022-11-22 02:13:30,380 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) [2022-11-22 02:13:30,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 281 transitions. [2022-11-22 02:13:30,382 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 281 transitions. Word has length 23 [2022-11-22 02:13:30,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:13:30,382 INFO L495 AbstractCegarLoop]: Abstraction has 205 states and 281 transitions. [2022-11-22 02:13:30,383 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) [2022-11-22 02:13:30,383 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 281 transitions. [2022-11-22 02:13:30,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-22 02:13:30,384 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:13:30,384 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] [2022-11-22 02:13:30,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-22 02:13:30,385 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)] === [2022-11-22 02:13:30,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:13:30,386 INFO L85 PathProgramCache]: Analyzing trace with hash -1643273810, now seen corresponding path program 1 times [2022-11-22 02:13:30,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:13:30,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596525605] [2022-11-22 02:13:30,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:13:30,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:13:30,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:13:30,627 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:13:30,628 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:13:30,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596525605] [2022-11-22 02:13:30,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596525605] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:13:30,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493791957] [2022-11-22 02:13:30,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:13:30,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:13:30,629 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:13:30,630 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:13:30,655 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-22 02:13:30,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:13:30,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-22 02:13:30,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:13:31,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:13:31,010 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 [2022-11-22 02:13:31,073 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:13:31,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:13:31,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493791957] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:13:31,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1700497373] [2022-11-22 02:13:31,246 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2022-11-22 02:13:31,246 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:13:31,246 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:13:31,247 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:13:31,247 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:13:31,388 INFO L321 Elim1Store]: treesize reduction 46, result has 64.6 percent of original size [2022-11-22 02:13:31,388 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 [2022-11-22 02:13:31,697 INFO L321 Elim1Store]: treesize reduction 118, result has 27.2 percent of original size [2022-11-22 02:13:31,698 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 [2022-11-22 02:13:32,037 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 187 for LOIs [2022-11-22 02:13:33,052 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:13:46,487 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 [2022-11-22 02:13:46,487 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:13:46,488 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-22 02:13:46,488 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 12 [2022-11-22 02:13:46,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351833024] [2022-11-22 02:13:46,488 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-22 02:13:46,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-22 02:13:46,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:13:46,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-22 02:13:46,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=938, Unknown=0, NotChecked=0, Total=1190 [2022-11-22 02:13:46,490 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) [2022-11-22 02:13:47,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:13:47,299 INFO L93 Difference]: Finished difference Result 320 states and 431 transitions. [2022-11-22 02:13:47,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-22 02:13:47,300 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 [2022-11-22 02:13:47,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:13:47,302 INFO L225 Difference]: With dead ends: 320 [2022-11-22 02:13:47,302 INFO L226 Difference]: Without dead ends: 320 [2022-11-22 02:13:47,303 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 585 ImplicationChecksByTransitivity, 14.1s TimeCoverageRelationStatistics Valid=407, Invalid=1663, Unknown=0, NotChecked=0, Total=2070 [2022-11-22 02:13:47,303 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 747 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 117 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 747 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-22 02:13:47,304 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [747 Valid, 173 Invalid, 364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 246 Invalid, 1 Unknown, 0 Unchecked, 0.3s Time] [2022-11-22 02:13:47,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2022-11-22 02:13:47,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 220. [2022-11-22 02:13:47,312 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) [2022-11-22 02:13:47,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 304 transitions. [2022-11-22 02:13:47,314 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 304 transitions. Word has length 25 [2022-11-22 02:13:47,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:13:47,314 INFO L495 AbstractCegarLoop]: Abstraction has 220 states and 304 transitions. [2022-11-22 02:13:47,315 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) [2022-11-22 02:13:47,315 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 304 transitions. [2022-11-22 02:13:47,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-22 02:13:47,316 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:13:47,316 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] [2022-11-22 02:13:47,322 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-22 02:13:47,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-22 02:13:47,521 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)] === [2022-11-22 02:13:47,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:13:47,522 INFO L85 PathProgramCache]: Analyzing trace with hash 1123038032, now seen corresponding path program 1 times [2022-11-22 02:13:47,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:13:47,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979077285] [2022-11-22 02:13:47,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:13:47,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:13:47,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:13:47,650 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:13:47,650 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:13:47,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979077285] [2022-11-22 02:13:47,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979077285] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:13:47,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387672038] [2022-11-22 02:13:47,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:13:47,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:13:47,651 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:13:47,652 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:13:47,675 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-22 02:13:47,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:13:47,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-22 02:13:47,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:13:47,859 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:13:47,860 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:13:47,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1387672038] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:13:47,860 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-22 02:13:47,860 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 8 [2022-11-22 02:13:47,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536072412] [2022-11-22 02:13:47,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:13:47,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 02:13:47,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:13:47,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 02:13:47,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-11-22 02:13:47,862 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) [2022-11-22 02:13:47,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:13:47,943 INFO L93 Difference]: Finished difference Result 266 states and 357 transitions. [2022-11-22 02:13:47,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 02:13:47,948 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 [2022-11-22 02:13:47,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:13:47,951 INFO L225 Difference]: With dead ends: 266 [2022-11-22 02:13:47,951 INFO L226 Difference]: Without dead ends: 266 [2022-11-22 02:13:47,951 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-11-22 02:13:47,952 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 112 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 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, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:13:47,952 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 141 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:13:47,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-11-22 02:13:47,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 224. [2022-11-22 02:13:47,961 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) [2022-11-22 02:13:47,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 308 transitions. [2022-11-22 02:13:47,963 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 308 transitions. Word has length 26 [2022-11-22 02:13:47,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:13:47,963 INFO L495 AbstractCegarLoop]: Abstraction has 224 states and 308 transitions. [2022-11-22 02:13:47,964 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) [2022-11-22 02:13:47,964 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 308 transitions. [2022-11-22 02:13:47,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-22 02:13:47,965 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:13:47,965 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] [2022-11-22 02:13:47,980 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-22 02:13:48,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-22 02:13:48,171 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)] === [2022-11-22 02:13:48,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:13:48,172 INFO L85 PathProgramCache]: Analyzing trace with hash 1361832013, now seen corresponding path program 1 times [2022-11-22 02:13:48,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:13:48,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242809729] [2022-11-22 02:13:48,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:13:48,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:13:48,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:13:48,710 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:13:48,710 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:13:48,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242809729] [2022-11-22 02:13:48,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242809729] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:13:48,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383049385] [2022-11-22 02:13:48,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:13:48,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:13:48,711 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:13:48,712 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:13:48,721 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-22 02:13:48,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:13:48,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-22 02:13:48,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:13:49,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:13:49,143 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 [2022-11-22 02:13:49,283 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 [2022-11-22 02:13:49,287 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 [2022-11-22 02:13:49,323 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:13:49,323 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:13:49,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [383049385] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:13:49,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1158774979] [2022-11-22 02:13:49,522 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2022-11-22 02:13:49,522 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:13:49,522 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:13:49,522 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:13:49,522 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:13:49,685 INFO L321 Elim1Store]: treesize reduction 46, result has 64.6 percent of original size [2022-11-22 02:13:49,686 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 [2022-11-22 02:13:49,967 INFO L321 Elim1Store]: treesize reduction 118, result has 27.2 percent of original size [2022-11-22 02:13:49,968 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 [2022-11-22 02:13:50,234 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 187 for LOIs [2022-11-22 02:13:51,145 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:14:06,711 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 [2022-11-22 02:14:06,711 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:14:06,711 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-22 02:14:06,711 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6] total 17 [2022-11-22 02:14:06,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591188163] [2022-11-22 02:14:06,712 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-22 02:14:06,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-22 02:14:06,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:14:06,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-22 02:14:06,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=313, Invalid=1169, Unknown=0, NotChecked=0, Total=1482 [2022-11-22 02:14:06,714 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) [2022-11-22 02:14:07,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:14:07,705 INFO L93 Difference]: Finished difference Result 264 states and 353 transitions. [2022-11-22 02:14:07,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-22 02:14:07,706 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 [2022-11-22 02:14:07,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:14:07,708 INFO L225 Difference]: With dead ends: 264 [2022-11-22 02:14:07,709 INFO L226 Difference]: Without dead ends: 264 [2022-11-22 02:14:07,710 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 790 ImplicationChecksByTransitivity, 16.5s TimeCoverageRelationStatistics Valid=474, Invalid=1976, Unknown=0, NotChecked=0, Total=2450 [2022-11-22 02:14:07,710 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 592 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 116 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 592 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-22 02:14:07,721 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [592 Valid, 245 Invalid, 394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 274 Invalid, 4 Unknown, 0 Unchecked, 0.4s Time] [2022-11-22 02:14:07,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2022-11-22 02:14:07,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 224. [2022-11-22 02:14:07,747 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) [2022-11-22 02:14:07,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 306 transitions. [2022-11-22 02:14:07,749 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 306 transitions. Word has length 27 [2022-11-22 02:14:07,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:14:07,749 INFO L495 AbstractCegarLoop]: Abstraction has 224 states and 306 transitions. [2022-11-22 02:14:07,749 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) [2022-11-22 02:14:07,750 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 306 transitions. [2022-11-22 02:14:07,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-22 02:14:07,751 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:14:07,751 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] [2022-11-22 02:14:07,769 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-22 02:14:07,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:14:07,963 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)] === [2022-11-22 02:14:07,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:14:07,964 INFO L85 PathProgramCache]: Analyzing trace with hash -732880510, now seen corresponding path program 1 times [2022-11-22 02:14:07,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:14:07,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013280662] [2022-11-22 02:14:07,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:14:07,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:14:07,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:14:08,185 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:14:08,185 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:14:08,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013280662] [2022-11-22 02:14:08,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013280662] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:14:08,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209080620] [2022-11-22 02:14:08,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:14:08,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:14:08,186 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:14:08,187 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:14:08,220 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-22 02:14:08,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:14:08,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-22 02:14:08,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:14:08,431 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 02:14:08,431 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 [2022-11-22 02:14:08,486 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:14:08,486 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:14:08,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209080620] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:14:08,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [646871274] [2022-11-22 02:14:08,562 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2022-11-22 02:14:08,562 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:14:08,562 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:14:08,562 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:14:08,563 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:14:08,701 INFO L321 Elim1Store]: treesize reduction 46, result has 64.6 percent of original size [2022-11-22 02:14:08,701 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 [2022-11-22 02:14:09,003 INFO L321 Elim1Store]: treesize reduction 118, result has 27.2 percent of original size [2022-11-22 02:14:09,003 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 [2022-11-22 02:14:09,327 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 187 for LOIs [2022-11-22 02:14:10,325 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:14:23,956 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 [2022-11-22 02:14:23,956 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:14:23,956 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-22 02:14:23,956 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2022-11-22 02:14:23,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314303785] [2022-11-22 02:14:23,956 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-22 02:14:23,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-22 02:14:23,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:14:23,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-22 02:14:23,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=698, Unknown=0, NotChecked=0, Total=930 [2022-11-22 02:14:23,958 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) [2022-11-22 02:14:24,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:14:24,517 INFO L93 Difference]: Finished difference Result 336 states and 428 transitions. [2022-11-22 02:14:24,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-22 02:14:24,518 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 [2022-11-22 02:14:24,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:14:24,520 INFO L225 Difference]: With dead ends: 336 [2022-11-22 02:14:24,520 INFO L226 Difference]: Without dead ends: 336 [2022-11-22 02:14:24,520 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 14.0s TimeCoverageRelationStatistics Valid=340, Invalid=1142, Unknown=0, NotChecked=0, Total=1482 [2022-11-22 02:14:24,521 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 431 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 23 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 431 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-22 02:14:24,521 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [431 Valid, 341 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 261 Invalid, 1 Unknown, 0 Unchecked, 0.3s Time] [2022-11-22 02:14:24,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2022-11-22 02:14:24,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 289. [2022-11-22 02:14:24,539 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) [2022-11-22 02:14:24,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 390 transitions. [2022-11-22 02:14:24,542 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 390 transitions. Word has length 28 [2022-11-22 02:14:24,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:14:24,543 INFO L495 AbstractCegarLoop]: Abstraction has 289 states and 390 transitions. [2022-11-22 02:14:24,543 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) [2022-11-22 02:14:24,543 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 390 transitions. [2022-11-22 02:14:24,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-22 02:14:24,549 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:14:24,549 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] [2022-11-22 02:14:24,564 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-22 02:14:24,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-22 02:14:24,759 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)] === [2022-11-22 02:14:24,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:14:24,760 INFO L85 PathProgramCache]: Analyzing trace with hash -1244459281, now seen corresponding path program 1 times [2022-11-22 02:14:24,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:14:24,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064624254] [2022-11-22 02:14:24,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:14:24,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:14:24,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:14:24,991 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:14:24,991 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:14:24,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064624254] [2022-11-22 02:14:24,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064624254] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:14:24,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933021729] [2022-11-22 02:14:24,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:14:24,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:14:24,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:14:24,994 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:14:25,019 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-22 02:14:25,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:14:25,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-22 02:14:25,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:14:25,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:14:25,222 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 [2022-11-22 02:14:25,307 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:14:25,307 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:14:25,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1933021729] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:14:25,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1644695434] [2022-11-22 02:14:25,431 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2022-11-22 02:14:25,432 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:14:25,432 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:14:25,432 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:14:25,432 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:14:25,568 INFO L321 Elim1Store]: treesize reduction 46, result has 64.6 percent of original size [2022-11-22 02:14:25,569 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 [2022-11-22 02:14:25,830 INFO L321 Elim1Store]: treesize reduction 118, result has 27.2 percent of original size [2022-11-22 02:14:25,830 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 [2022-11-22 02:14:26,144 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 187 for LOIs [2022-11-22 02:14:26,906 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:14:39,974 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 [2022-11-22 02:14:39,974 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:14:39,975 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-22 02:14:39,975 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 13 [2022-11-22 02:14:39,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265924070] [2022-11-22 02:14:39,975 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-22 02:14:39,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-22 02:14:39,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:14:39,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-22 02:14:39,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=1084, Unknown=0, NotChecked=0, Total=1332 [2022-11-22 02:14:39,977 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) [2022-11-22 02:14:40,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:14:40,682 INFO L93 Difference]: Finished difference Result 364 states and 452 transitions. [2022-11-22 02:14:40,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-22 02:14:40,687 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 [2022-11-22 02:14:40,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:14:40,690 INFO L225 Difference]: With dead ends: 364 [2022-11-22 02:14:40,690 INFO L226 Difference]: Without dead ends: 364 [2022-11-22 02:14:40,691 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 732 ImplicationChecksByTransitivity, 13.6s TimeCoverageRelationStatistics Valid=402, Invalid=1854, Unknown=0, NotChecked=0, Total=2256 [2022-11-22 02:14:40,692 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 615 mSDsluCounter, 292 mSDsCounter, 0 mSdLazyCounter, 337 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 615 SdHoareTripleChecker+Valid, 343 SdHoareTripleChecker+Invalid, 374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-22 02:14:40,693 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [615 Valid, 343 Invalid, 374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 337 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-22 02:14:40,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2022-11-22 02:14:40,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 315. [2022-11-22 02:14:40,704 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) [2022-11-22 02:14:40,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 424 transitions. [2022-11-22 02:14:40,711 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 424 transitions. Word has length 29 [2022-11-22 02:14:40,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:14:40,716 INFO L495 AbstractCegarLoop]: Abstraction has 315 states and 424 transitions. [2022-11-22 02:14:40,716 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) [2022-11-22 02:14:40,716 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 424 transitions. [2022-11-22 02:14:40,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-22 02:14:40,722 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:14:40,722 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] [2022-11-22 02:14:40,728 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-22 02:14:40,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-22 02:14:40,928 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)] === [2022-11-22 02:14:40,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:14:40,928 INFO L85 PathProgramCache]: Analyzing trace with hash 1727568309, now seen corresponding path program 1 times [2022-11-22 02:14:40,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:14:40,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390871307] [2022-11-22 02:14:40,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:14:40,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:14:40,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:14:41,215 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:14:41,215 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:14:41,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390871307] [2022-11-22 02:14:41,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390871307] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:14:41,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718752062] [2022-11-22 02:14:41,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:14:41,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:14:41,218 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:14:41,219 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:14:41,243 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-22 02:14:41,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:14:41,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-22 02:14:41,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:14:41,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:14:41,550 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 [2022-11-22 02:14:41,716 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:14:41,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:14:41,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718752062] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:14:41,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [828137232] [2022-11-22 02:14:41,940 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2022-11-22 02:14:41,940 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:14:41,941 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:14:41,941 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:14:41,941 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:14:42,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:14:42,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:14:42,189 INFO L321 Elim1Store]: treesize reduction 148, result has 13.5 percent of original size [2022-11-22 02:14:42,189 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 [2022-11-22 02:14:42,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:14:42,265 INFO L321 Elim1Store]: treesize reduction 174, result has 23.0 percent of original size [2022-11-22 02:14:42,266 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 [2022-11-22 02:14:42,743 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 41 for LOIs [2022-11-22 02:14:42,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:14:42,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:14:42,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:14:42,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:14:42,971 INFO L321 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-11-22 02:14:42,971 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 [2022-11-22 02:14:42,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:14:42,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:14:43,025 INFO L321 Elim1Store]: treesize reduction 52, result has 26.8 percent of original size [2022-11-22 02:14:43,025 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 [2022-11-22 02:14:43,206 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:14:47,213 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 [2022-11-22 02:14:47,213 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:14:47,213 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-22 02:14:47,213 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 15 [2022-11-22 02:14:47,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471182168] [2022-11-22 02:14:47,213 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-22 02:14:47,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-22 02:14:47,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:14:47,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-22 02:14:47,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=1313, Unknown=4, NotChecked=0, Total=1482 [2022-11-22 02:14:47,215 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) [2022-11-22 02:14:48,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:14:48,257 INFO L93 Difference]: Finished difference Result 402 states and 519 transitions. [2022-11-22 02:14:48,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-22 02:14:48,257 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 [2022-11-22 02:14:48,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:14:48,259 INFO L225 Difference]: With dead ends: 402 [2022-11-22 02:14:48,259 INFO L226 Difference]: Without dead ends: 402 [2022-11-22 02:14:48,260 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 674 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=348, Invalid=2198, Unknown=4, NotChecked=0, Total=2550 [2022-11-22 02:14:48,261 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 597 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 435 mSolverCounterSat, 71 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 597 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 435 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-22 02:14:48,261 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [597 Valid, 258 Invalid, 507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 435 Invalid, 1 Unknown, 0 Unchecked, 0.4s Time] [2022-11-22 02:14:48,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2022-11-22 02:14:48,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 193. [2022-11-22 02:14:48,270 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) [2022-11-22 02:14:48,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 244 transitions. [2022-11-22 02:14:48,271 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 244 transitions. Word has length 33 [2022-11-22 02:14:48,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:14:48,272 INFO L495 AbstractCegarLoop]: Abstraction has 193 states and 244 transitions. [2022-11-22 02:14:48,272 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) [2022-11-22 02:14:48,272 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 244 transitions. [2022-11-22 02:14:48,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-22 02:14:48,273 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:14:48,273 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] [2022-11-22 02:14:48,279 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-22 02:14:48,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-22 02:14:48,479 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)] === [2022-11-22 02:14:48,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:14:48,479 INFO L85 PathProgramCache]: Analyzing trace with hash 2015009977, now seen corresponding path program 1 times [2022-11-22 02:14:48,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:14:48,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772347065] [2022-11-22 02:14:48,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:14:48,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:14:48,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:14:48,807 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:14:48,807 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:14:48,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772347065] [2022-11-22 02:14:48,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772347065] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:14:48,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342188849] [2022-11-22 02:14:48,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:14:48,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:14:48,808 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:14:48,809 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:14:48,813 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-22 02:14:48,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:14:48,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-22 02:14:48,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:14:49,186 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 02:14:49,193 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 [2022-11-22 02:14:49,385 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 [2022-11-22 02:14:49,410 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:14:49,410 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:14:49,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1342188849] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:14:49,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [6629829] [2022-11-22 02:14:49,557 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2022-11-22 02:14:49,557 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:14:49,557 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:14:49,558 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:14:49,558 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:14:49,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:14:49,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:14:49,770 INFO L321 Elim1Store]: treesize reduction 165, result has 19.9 percent of original size [2022-11-22 02:14:49,771 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 [2022-11-22 02:14:49,874 INFO L321 Elim1Store]: treesize reduction 205, result has 30.0 percent of original size [2022-11-22 02:14:49,874 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 [2022-11-22 02:14:50,462 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 187 for LOIs [2022-11-22 02:14:50,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:14:50,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:14:50,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:14:50,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:14:50,868 INFO L321 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-11-22 02:14:50,868 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 [2022-11-22 02:14:50,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:14:50,937 INFO L321 Elim1Store]: treesize reduction 70, result has 28.6 percent of original size [2022-11-22 02:14:50,937 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 [2022-11-22 02:14:51,128 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:14:54,809 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 [2022-11-22 02:14:54,809 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:14:54,809 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-22 02:14:54,809 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 15 [2022-11-22 02:14:54,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504774084] [2022-11-22 02:14:54,809 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-22 02:14:54,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-22 02:14:54,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:14:54,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-22 02:14:54,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1233, Unknown=1, NotChecked=0, Total=1406 [2022-11-22 02:14:54,811 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) [2022-11-22 02:14:55,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:14:55,560 INFO L93 Difference]: Finished difference Result 269 states and 315 transitions. [2022-11-22 02:14:55,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-22 02:14:55,561 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 [2022-11-22 02:14:55,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:14:55,564 INFO L225 Difference]: With dead ends: 269 [2022-11-22 02:14:55,564 INFO L226 Difference]: Without dead ends: 269 [2022-11-22 02:14:55,565 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 51 SyntacticMatches, 4 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 727 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=302, Invalid=1953, Unknown=1, NotChecked=0, Total=2256 [2022-11-22 02:14:55,568 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 475 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 390 mSolverCounterSat, 44 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 475 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 390 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-22 02:14:55,569 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [475 Valid, 388 Invalid, 437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 390 Invalid, 3 Unknown, 0 Unchecked, 0.4s Time] [2022-11-22 02:14:55,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2022-11-22 02:14:55,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 193. [2022-11-22 02:14:55,583 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) [2022-11-22 02:14:55,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 242 transitions. [2022-11-22 02:14:55,588 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 242 transitions. Word has length 34 [2022-11-22 02:14:55,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:14:55,588 INFO L495 AbstractCegarLoop]: Abstraction has 193 states and 242 transitions. [2022-11-22 02:14:55,589 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) [2022-11-22 02:14:55,589 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 242 transitions. [2022-11-22 02:14:55,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-22 02:14:55,591 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:14:55,591 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] [2022-11-22 02:14:55,604 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-11-22 02:14:55,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:14:55,798 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)] === [2022-11-22 02:14:55,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:14:55,799 INFO L85 PathProgramCache]: Analyzing trace with hash -1959200108, now seen corresponding path program 1 times [2022-11-22 02:14:55,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:14:55,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885655599] [2022-11-22 02:14:55,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:14:55,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:14:55,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:14:56,311 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:14:56,311 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:14:56,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885655599] [2022-11-22 02:14:56,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885655599] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:14:56,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609287217] [2022-11-22 02:14:56,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:14:56,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:14:56,312 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:14:56,313 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:14:56,345 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-22 02:14:56,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:14:56,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-22 02:14:56,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:14:56,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:14:56,783 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 [2022-11-22 02:14:57,034 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 [2022-11-22 02:14:57,040 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 [2022-11-22 02:14:57,073 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:14:57,074 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:14:57,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609287217] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:14:57,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1705859524] [2022-11-22 02:14:57,377 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2022-11-22 02:14:57,377 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:14:57,378 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:14:57,378 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:14:57,378 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:14:57,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:14:57,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:14:57,590 INFO L321 Elim1Store]: treesize reduction 148, result has 13.5 percent of original size [2022-11-22 02:14:57,591 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 [2022-11-22 02:14:57,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:14:57,684 INFO L321 Elim1Store]: treesize reduction 174, result has 23.0 percent of original size [2022-11-22 02:14:57,684 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 [2022-11-22 02:14:58,137 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 41 for LOIs [2022-11-22 02:14:58,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:14:58,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:14:58,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:14:58,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:14:58,473 INFO L321 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-11-22 02:14:58,473 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 [2022-11-22 02:14:58,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:14:58,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:14:58,525 INFO L321 Elim1Store]: treesize reduction 52, result has 26.8 percent of original size [2022-11-22 02:14:58,525 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 [2022-11-22 02:14:58,796 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:15:04,167 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 [2022-11-22 02:15:04,167 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:15:04,168 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-22 02:15:04,168 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 16 [2022-11-22 02:15:04,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146314244] [2022-11-22 02:15:04,168 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-22 02:15:04,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-22 02:15:04,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:15:04,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-22 02:15:04,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1472, Unknown=1, NotChecked=0, Total=1640 [2022-11-22 02:15:04,170 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) [2022-11-22 02:15:05,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:15:05,954 INFO L93 Difference]: Finished difference Result 290 states and 337 transitions. [2022-11-22 02:15:05,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-22 02:15:05,955 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 [2022-11-22 02:15:05,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:15:05,957 INFO L225 Difference]: With dead ends: 290 [2022-11-22 02:15:05,957 INFO L226 Difference]: Without dead ends: 290 [2022-11-22 02:15:05,959 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 51 SyntacticMatches, 4 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 968 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=419, Invalid=2886, Unknown=1, NotChecked=0, Total=3306 [2022-11-22 02:15:05,960 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 589 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 513 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 589 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-22 02:15:05,960 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [589 Valid, 395 Invalid, 587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 513 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-22 02:15:05,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2022-11-22 02:15:05,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 194. [2022-11-22 02:15:05,968 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) [2022-11-22 02:15:05,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 241 transitions. [2022-11-22 02:15:05,969 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 241 transitions. Word has length 35 [2022-11-22 02:15:05,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:15:05,970 INFO L495 AbstractCegarLoop]: Abstraction has 194 states and 241 transitions. [2022-11-22 02:15:05,970 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) [2022-11-22 02:15:05,971 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 241 transitions. [2022-11-22 02:15:05,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-22 02:15:05,971 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:15:05,972 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] [2022-11-22 02:15:05,979 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-22 02:15:06,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-22 02:15:06,179 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)] === [2022-11-22 02:15:06,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:15:06,180 INFO L85 PathProgramCache]: Analyzing trace with hash -724690043, now seen corresponding path program 1 times [2022-11-22 02:15:06,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:15:06,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461685023] [2022-11-22 02:15:06,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:15:06,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:15:06,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:15:06,265 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:15:06,265 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:15:06,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461685023] [2022-11-22 02:15:06,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461685023] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:15:06,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506312956] [2022-11-22 02:15:06,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:15:06,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:15:06,267 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:15:06,268 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:15:06,306 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-22 02:15:06,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:15:06,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-22 02:15:06,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:15:06,429 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:15:06,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:15:06,483 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:15:06,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506312956] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:15:06,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [118103137] [2022-11-22 02:15:06,486 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2022-11-22 02:15:06,486 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:15:06,487 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:15:06,487 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:15:06,487 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:15:06,622 INFO L321 Elim1Store]: treesize reduction 118, result has 27.2 percent of original size [2022-11-22 02:15:06,622 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 [2022-11-22 02:15:06,649 INFO L321 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2022-11-22 02:15:06,649 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 [2022-11-22 02:15:07,058 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 41 for LOIs [2022-11-22 02:15:07,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:15:07,258 INFO L321 Elim1Store]: treesize reduction 46, result has 62.3 percent of original size [2022-11-22 02:15:07,259 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 [2022-11-22 02:15:07,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:15:07,480 INFO L321 Elim1Store]: treesize reduction 110, result has 28.6 percent of original size [2022-11-22 02:15:07,480 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 [2022-11-22 02:15:07,667 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:15:13,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [118103137] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:15:13,541 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:15:13,541 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [3, 3, 3] total 21 [2022-11-22 02:15:13,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327092504] [2022-11-22 02:15:13,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:15:13,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-22 02:15:13,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:15:13,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-22 02:15:13,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2022-11-22 02:15:13,543 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) [2022-11-22 02:15:14,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:15:14,230 INFO L93 Difference]: Finished difference Result 273 states and 331 transitions. [2022-11-22 02:15:14,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-22 02:15:14,233 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 [2022-11-22 02:15:14,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:15:14,235 INFO L225 Difference]: With dead ends: 273 [2022-11-22 02:15:14,235 INFO L226 Difference]: Without dead ends: 273 [2022-11-22 02:15:14,235 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 90 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2022-11-22 02:15:14,236 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 105 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-22 02:15:14,236 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 127 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-22 02:15:14,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2022-11-22 02:15:14,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 250. [2022-11-22 02:15:14,251 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) [2022-11-22 02:15:14,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 313 transitions. [2022-11-22 02:15:14,253 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 313 transitions. Word has length 37 [2022-11-22 02:15:14,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:15:14,253 INFO L495 AbstractCegarLoop]: Abstraction has 250 states and 313 transitions. [2022-11-22 02:15:14,253 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) [2022-11-22 02:15:14,254 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 313 transitions. [2022-11-22 02:15:14,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-22 02:15:14,255 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:15:14,255 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] [2022-11-22 02:15:14,269 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-22 02:15:14,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-22 02:15:14,463 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)] === [2022-11-22 02:15:14,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:15:14,463 INFO L85 PathProgramCache]: Analyzing trace with hash 1556026682, now seen corresponding path program 1 times [2022-11-22 02:15:14,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:15:14,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178515092] [2022-11-22 02:15:14,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:15:14,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:15:14,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:15:14,595 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-22 02:15:14,596 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:15:14,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178515092] [2022-11-22 02:15:14,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178515092] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:15:14,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241624331] [2022-11-22 02:15:14,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:15:14,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:15:14,597 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:15:14,598 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:15:14,627 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-22 02:15:14,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:15:14,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-22 02:15:14,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:15:14,795 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-22 02:15:14,795 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:15:14,927 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-22 02:15:14,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1241624331] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-22 02:15:14,928 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-22 02:15:14,928 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3, 2] total 6 [2022-11-22 02:15:14,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54826106] [2022-11-22 02:15:14,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:15:14,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 02:15:14,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:15:14,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 02:15:14,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-22 02:15:14,929 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) [2022-11-22 02:15:14,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:15:14,982 INFO L93 Difference]: Finished difference Result 393 states and 494 transitions. [2022-11-22 02:15:14,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 02:15:14,983 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 [2022-11-22 02:15:14,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:15:14,985 INFO L225 Difference]: With dead ends: 393 [2022-11-22 02:15:14,986 INFO L226 Difference]: Without dead ends: 393 [2022-11-22 02:15:14,986 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 [2022-11-22 02:15:14,987 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 68 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 02:15:14,987 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 122 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 02:15:14,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2022-11-22 02:15:14,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 377. [2022-11-22 02:15:14,999 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) [2022-11-22 02:15:15,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 485 transitions. [2022-11-22 02:15:15,001 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 485 transitions. Word has length 38 [2022-11-22 02:15:15,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:15:15,002 INFO L495 AbstractCegarLoop]: Abstraction has 377 states and 485 transitions. [2022-11-22 02:15:15,002 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) [2022-11-22 02:15:15,002 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 485 transitions. [2022-11-22 02:15:15,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-22 02:15:15,003 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:15:15,003 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] [2022-11-22 02:15:15,016 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-22 02:15:15,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:15:15,216 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)] === [2022-11-22 02:15:15,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:15:15,217 INFO L85 PathProgramCache]: Analyzing trace with hash -990554755, now seen corresponding path program 1 times [2022-11-22 02:15:15,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:15:15,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569585187] [2022-11-22 02:15:15,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:15:15,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:15:15,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:15:15,336 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:15:15,336 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:15:15,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569585187] [2022-11-22 02:15:15,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569585187] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:15:15,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019135716] [2022-11-22 02:15:15,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:15:15,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:15:15,338 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:15:15,339 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:15:15,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-22 02:15:15,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:15:15,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-22 02:15:15,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:15:15,512 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:15:15,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:15:15,589 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:15:15,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019135716] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:15:15,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [789136605] [2022-11-22 02:15:15,593 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2022-11-22 02:15:15,593 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:15:15,593 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:15:15,594 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:15:15,594 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:15:15,728 INFO L321 Elim1Store]: treesize reduction 118, result has 27.2 percent of original size [2022-11-22 02:15:15,728 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 [2022-11-22 02:15:15,768 INFO L321 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2022-11-22 02:15:15,768 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 [2022-11-22 02:15:16,123 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 41 for LOIs [2022-11-22 02:15:16,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:15:16,287 INFO L321 Elim1Store]: treesize reduction 110, result has 28.6 percent of original size [2022-11-22 02:15:16,287 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 [2022-11-22 02:15:16,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:15:16,315 INFO L321 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-11-22 02:15:16,315 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 [2022-11-22 02:15:16,473 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:15:21,274 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 [2022-11-22 02:15:21,274 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:15:21,274 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:15:21,274 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 3 [2022-11-22 02:15:21,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221201807] [2022-11-22 02:15:21,274 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 02:15:21,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 02:15:21,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:15:21,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 02:15:21,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=388, Unknown=0, NotChecked=0, Total=506 [2022-11-22 02:15:21,276 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) [2022-11-22 02:15:21,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:15:21,346 INFO L93 Difference]: Finished difference Result 378 states and 482 transitions. [2022-11-22 02:15:21,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 02:15:21,347 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 [2022-11-22 02:15:21,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:15:21,349 INFO L225 Difference]: With dead ends: 378 [2022-11-22 02:15:21,349 INFO L226 Difference]: Without dead ends: 378 [2022-11-22 02:15:21,350 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 90 SyntacticMatches, 5 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=124, Invalid=428, Unknown=0, NotChecked=0, Total=552 [2022-11-22 02:15:21,350 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 [2022-11-22 02:15:21,351 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] [2022-11-22 02:15:21,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2022-11-22 02:15:21,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 375. [2022-11-22 02:15:21,361 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) [2022-11-22 02:15:21,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 479 transitions. [2022-11-22 02:15:21,363 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 479 transitions. Word has length 38 [2022-11-22 02:15:21,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:15:21,363 INFO L495 AbstractCegarLoop]: Abstraction has 375 states and 479 transitions. [2022-11-22 02:15:21,363 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) [2022-11-22 02:15:21,364 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 479 transitions. [2022-11-22 02:15:21,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-22 02:15:21,364 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:15:21,364 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] [2022-11-22 02:15:21,371 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-22 02:15:21,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:15:21,567 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)] === [2022-11-22 02:15:21,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:15:21,568 INFO L85 PathProgramCache]: Analyzing trace with hash -642426233, now seen corresponding path program 1 times [2022-11-22 02:15:21,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:15:21,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688220842] [2022-11-22 02:15:21,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:15:21,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:15:21,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:15:21,711 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:15:21,711 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:15:21,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688220842] [2022-11-22 02:15:21,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688220842] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:15:21,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716333302] [2022-11-22 02:15:21,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:15:21,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:15:21,712 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:15:21,713 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:15:21,739 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-22 02:15:21,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:15:21,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-22 02:15:21,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:15:21,829 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 [2022-11-22 02:15:21,879 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 02:15:21,879 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 [2022-11-22 02:15:21,889 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:15:21,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:15:22,050 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:15:22,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [716333302] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:15:22,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1358493131] [2022-11-22 02:15:22,058 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2022-11-22 02:15:22,058 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:15:22,060 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:15:22,060 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:15:22,061 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:15:22,177 INFO L321 Elim1Store]: treesize reduction 118, result has 27.2 percent of original size [2022-11-22 02:15:22,177 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 [2022-11-22 02:15:22,204 INFO L321 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2022-11-22 02:15:22,204 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 [2022-11-22 02:15:22,597 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 41 for LOIs [2022-11-22 02:15:22,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:15:22,800 INFO L321 Elim1Store]: treesize reduction 110, result has 28.6 percent of original size [2022-11-22 02:15:22,801 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 [2022-11-22 02:15:22,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:15:22,830 INFO L321 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-11-22 02:15:22,831 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 [2022-11-22 02:15:22,999 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:15:28,709 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 [2022-11-22 02:15:28,709 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:15:28,709 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:15:28,710 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 4] total 5 [2022-11-22 02:15:28,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573127434] [2022-11-22 02:15:28,710 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 02:15:28,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-22 02:15:28,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:15:28,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-22 02:15:28,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=506, Unknown=0, NotChecked=0, Total=650 [2022-11-22 02:15:28,711 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) [2022-11-22 02:15:28,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:15:28,871 INFO L93 Difference]: Finished difference Result 409 states and 512 transitions. [2022-11-22 02:15:28,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 02:15:28,872 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 [2022-11-22 02:15:28,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:15:28,874 INFO L225 Difference]: With dead ends: 409 [2022-11-22 02:15:28,874 INFO L226 Difference]: Without dead ends: 409 [2022-11-22 02:15:28,875 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 95 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=152, Invalid=550, Unknown=0, NotChecked=0, Total=702 [2022-11-22 02:15:28,876 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 58 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:15:28,876 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 166 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:15:28,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2022-11-22 02:15:28,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 382. [2022-11-22 02:15:28,899 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) [2022-11-22 02:15:28,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 487 transitions. [2022-11-22 02:15:28,901 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 487 transitions. Word has length 39 [2022-11-22 02:15:28,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:15:28,902 INFO L495 AbstractCegarLoop]: Abstraction has 382 states and 487 transitions. [2022-11-22 02:15:28,902 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) [2022-11-22 02:15:28,902 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 487 transitions. [2022-11-22 02:15:28,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-22 02:15:28,903 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:15:28,903 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] [2022-11-22 02:15:28,919 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-22 02:15:29,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-11-22 02:15:29,112 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)] === [2022-11-22 02:15:29,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:15:29,113 INFO L85 PathProgramCache]: Analyzing trace with hash 693025532, now seen corresponding path program 1 times [2022-11-22 02:15:29,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:15:29,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409160538] [2022-11-22 02:15:29,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:15:29,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:15:29,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:15:29,251 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-22 02:15:29,252 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:15:29,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409160538] [2022-11-22 02:15:29,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409160538] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:15:29,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238957504] [2022-11-22 02:15:29,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:15:29,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:15:29,253 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:15:29,254 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:15:29,281 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-22 02:15:29,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:15:29,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-22 02:15:29,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:15:29,418 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-22 02:15:29,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:15:29,534 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-22 02:15:29,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [238957504] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-22 02:15:29,535 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-22 02:15:29,535 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3, 2] total 6 [2022-11-22 02:15:29,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458247347] [2022-11-22 02:15:29,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:15:29,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 02:15:29,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:15:29,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 02:15:29,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-22 02:15:29,537 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) [2022-11-22 02:15:29,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:15:29,593 INFO L93 Difference]: Finished difference Result 453 states and 565 transitions. [2022-11-22 02:15:29,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 02:15:29,594 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 [2022-11-22 02:15:29,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:15:29,596 INFO L225 Difference]: With dead ends: 453 [2022-11-22 02:15:29,596 INFO L226 Difference]: Without dead ends: 453 [2022-11-22 02:15:29,597 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 [2022-11-22 02:15:29,597 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 79 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 02:15:29,598 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 112 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 02:15:29,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2022-11-22 02:15:29,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 430. [2022-11-22 02:15:29,608 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) [2022-11-22 02:15:29,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 549 transitions. [2022-11-22 02:15:29,610 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 549 transitions. Word has length 40 [2022-11-22 02:15:29,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:15:29,611 INFO L495 AbstractCegarLoop]: Abstraction has 430 states and 549 transitions. [2022-11-22 02:15:29,611 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) [2022-11-22 02:15:29,611 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 549 transitions. [2022-11-22 02:15:29,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-22 02:15:29,612 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:15:29,612 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] [2022-11-22 02:15:29,619 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-22 02:15:29,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-11-22 02:15:29,819 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)] === [2022-11-22 02:15:29,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:15:29,819 INFO L85 PathProgramCache]: Analyzing trace with hash -1106991010, now seen corresponding path program 1 times [2022-11-22 02:15:29,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:15:29,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655708553] [2022-11-22 02:15:29,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:15:29,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:15:29,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:15:29,868 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-22 02:15:29,868 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:15:29,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655708553] [2022-11-22 02:15:29,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655708553] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:15:29,869 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:15:29,869 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 02:15:29,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870215828] [2022-11-22 02:15:29,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:15:29,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:15:29,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:15:29,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:15:29,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:15:29,871 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) [2022-11-22 02:15:29,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:15:29,882 INFO L93 Difference]: Finished difference Result 310 states and 372 transitions. [2022-11-22 02:15:29,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:15:29,882 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 [2022-11-22 02:15:29,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:15:29,884 INFO L225 Difference]: With dead ends: 310 [2022-11-22 02:15:29,884 INFO L226 Difference]: Without dead ends: 310 [2022-11-22 02:15:29,885 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 [2022-11-22 02:15:29,886 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 [2022-11-22 02:15:29,886 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] [2022-11-22 02:15:29,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2022-11-22 02:15:29,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 292. [2022-11-22 02:15:29,895 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) [2022-11-22 02:15:29,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 354 transitions. [2022-11-22 02:15:29,896 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 354 transitions. Word has length 44 [2022-11-22 02:15:29,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:15:29,897 INFO L495 AbstractCegarLoop]: Abstraction has 292 states and 354 transitions. [2022-11-22 02:15:29,897 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) [2022-11-22 02:15:29,897 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 354 transitions. [2022-11-22 02:15:29,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-22 02:15:29,898 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:15:29,898 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] [2022-11-22 02:15:29,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-11-22 02:15:29,899 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)] === [2022-11-22 02:15:29,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:15:29,899 INFO L85 PathProgramCache]: Analyzing trace with hash -1705702260, now seen corresponding path program 1 times [2022-11-22 02:15:29,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:15:29,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140628717] [2022-11-22 02:15:29,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:15:29,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:15:29,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:15:29,969 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 19 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-22 02:15:29,970 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:15:29,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140628717] [2022-11-22 02:15:29,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140628717] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:15:29,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694377692] [2022-11-22 02:15:29,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:15:29,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:15:29,971 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:15:29,972 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:15:30,004 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-22 02:15:30,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:15:30,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-22 02:15:30,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:15:30,304 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 19 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 02:15:30,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:15:30,684 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 21 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:15:30,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1694377692] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:15:30,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2114122367] [2022-11-22 02:15:30,686 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2022-11-22 02:15:30,686 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:15:30,687 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:15:30,687 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:15:30,687 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:15:30,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:15:30,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:15:30,890 INFO L321 Elim1Store]: treesize reduction 148, result has 13.5 percent of original size [2022-11-22 02:15:30,890 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 [2022-11-22 02:15:30,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:15:30,961 INFO L321 Elim1Store]: treesize reduction 174, result has 23.0 percent of original size [2022-11-22 02:15:30,962 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 [2022-11-22 02:15:31,461 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 41 for LOIs [2022-11-22 02:15:31,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:15:31,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:15:31,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:15:31,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:15:31,666 INFO L321 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-11-22 02:15:31,666 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 [2022-11-22 02:15:31,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:15:31,727 INFO L321 Elim1Store]: treesize reduction 70, result has 28.6 percent of original size [2022-11-22 02:15:31,727 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 [2022-11-22 02:15:31,933 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:15:35,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [2114122367] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:15:35,476 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:15:35,476 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [3, 5, 7] total 31 [2022-11-22 02:15:35,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277055609] [2022-11-22 02:15:35,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:15:35,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-22 02:15:35,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:15:35,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-22 02:15:35,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=777, Unknown=0, NotChecked=0, Total=930 [2022-11-22 02:15:35,478 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) [2022-11-22 02:15:37,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:15:37,674 INFO L93 Difference]: Finished difference Result 312 states and 373 transitions. [2022-11-22 02:15:37,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-22 02:15:37,675 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 [2022-11-22 02:15:37,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:15:37,676 INFO L225 Difference]: With dead ends: 312 [2022-11-22 02:15:37,676 INFO L226 Difference]: Without dead ends: 312 [2022-11-22 02:15:37,677 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 105 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 490 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=315, Invalid=1665, Unknown=0, NotChecked=0, Total=1980 [2022-11-22 02:15:37,678 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 88 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 369 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 369 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-22 02:15:37,678 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 140 Invalid, 379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 369 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-22 02:15:37,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2022-11-22 02:15:37,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 250. [2022-11-22 02:15:37,684 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) [2022-11-22 02:15:37,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 301 transitions. [2022-11-22 02:15:37,685 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 301 transitions. Word has length 45 [2022-11-22 02:15:37,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:15:37,686 INFO L495 AbstractCegarLoop]: Abstraction has 250 states and 301 transitions. [2022-11-22 02:15:37,686 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) [2022-11-22 02:15:37,686 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 301 transitions. [2022-11-22 02:15:37,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-22 02:15:37,687 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:15:37,687 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] [2022-11-22 02:15:37,698 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-22 02:15:37,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-22 02:15:37,894 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)] === [2022-11-22 02:15:37,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:15:37,894 INFO L85 PathProgramCache]: Analyzing trace with hash 2087117614, now seen corresponding path program 1 times [2022-11-22 02:15:37,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:15:37,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955277190] [2022-11-22 02:15:37,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:15:37,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:15:37,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:15:38,171 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:15:38,171 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:15:38,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955277190] [2022-11-22 02:15:38,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955277190] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:15:38,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875066106] [2022-11-22 02:15:38,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:15:38,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:15:38,172 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:15:38,175 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:15:38,200 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-22 02:15:38,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:15:38,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-22 02:15:38,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:15:38,403 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-22 02:15:38,404 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 [2022-11-22 02:15:38,527 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 02:15:38,527 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 [2022-11-22 02:15:38,571 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-22 02:15:38,572 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 [2022-11-22 02:15:38,639 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:15:38,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:15:38,685 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-22 02:15:38,685 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 [2022-11-22 02:15:38,937 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-22 02:15:38,938 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 [2022-11-22 02:15:39,137 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:15:39,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875066106] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:15:39,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1361536578] [2022-11-22 02:15:39,143 INFO L159 IcfgInterpreter]: Started Sifa with 27 locations of interest [2022-11-22 02:15:39,143 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:15:39,144 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:15:39,144 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:15:39,144 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:15:39,271 INFO L321 Elim1Store]: treesize reduction 46, result has 64.6 percent of original size [2022-11-22 02:15:39,272 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 [2022-11-22 02:15:39,481 INFO L321 Elim1Store]: treesize reduction 118, result has 27.2 percent of original size [2022-11-22 02:15:39,481 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 [2022-11-22 02:15:39,653 INFO L321 Elim1Store]: treesize reduction 136, result has 28.0 percent of original size [2022-11-22 02:15:39,653 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 [2022-11-22 02:15:39,669 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2022-11-22 02:15:39,770 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2022-11-22 02:15:40,179 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 25 for LOIs [2022-11-22 02:15:40,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:15:40,291 INFO L321 Elim1Store]: treesize reduction 46, result has 62.3 percent of original size [2022-11-22 02:15:40,292 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 [2022-11-22 02:15:40,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:15:40,433 INFO L321 Elim1Store]: treesize reduction 110, result has 28.6 percent of original size [2022-11-22 02:15:40,433 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 [2022-11-22 02:15:40,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:15:40,627 INFO L321 Elim1Store]: treesize reduction 128, result has 29.3 percent of original size [2022-11-22 02:15:40,628 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 [2022-11-22 02:15:40,654 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2022-11-22 02:15:40,706 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2022-11-22 02:15:40,764 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2022-11-22 02:15:40,832 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:15:45,082 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 [2022-11-22 02:15:45,082 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:15:45,082 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:15:45,082 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 10] total 25 [2022-11-22 02:15:45,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109988126] [2022-11-22 02:15:45,083 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 02:15:45,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-22 02:15:45,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:15:45,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-22 02:15:45,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=1674, Unknown=0, NotChecked=0, Total=1980 [2022-11-22 02:15:45,084 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) [2022-11-22 02:15:45,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:15:45,360 INFO L93 Difference]: Finished difference Result 255 states and 306 transitions. [2022-11-22 02:15:45,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-22 02:15:45,360 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 [2022-11-22 02:15:45,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:15:45,362 INFO L225 Difference]: With dead ends: 255 [2022-11-22 02:15:45,362 INFO L226 Difference]: Without dead ends: 255 [2022-11-22 02:15:45,363 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 108 SyntacticMatches, 4 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 762 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=392, Invalid=1960, Unknown=0, NotChecked=0, Total=2352 [2022-11-22 02:15:45,363 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 237 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:15:45,364 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [237 Valid, 114 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:15:45,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2022-11-22 02:15:45,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 249. [2022-11-22 02:15:45,370 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) [2022-11-22 02:15:45,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 300 transitions. [2022-11-22 02:15:45,371 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 300 transitions. Word has length 48 [2022-11-22 02:15:45,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:15:45,372 INFO L495 AbstractCegarLoop]: Abstraction has 249 states and 300 transitions. [2022-11-22 02:15:45,372 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) [2022-11-22 02:15:45,372 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 300 transitions. [2022-11-22 02:15:45,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-22 02:15:45,373 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:15:45,373 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] [2022-11-22 02:15:45,388 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-22 02:15:45,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-22 02:15:45,580 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)] === [2022-11-22 02:15:45,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:15:45,580 INFO L85 PathProgramCache]: Analyzing trace with hash 187710493, now seen corresponding path program 1 times [2022-11-22 02:15:45,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:15:45,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932509991] [2022-11-22 02:15:45,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:15:45,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:15:45,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:15:45,665 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 24 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:15:45,666 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:15:45,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932509991] [2022-11-22 02:15:45,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932509991] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:15:45,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149394075] [2022-11-22 02:15:45,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:15:45,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:15:45,667 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:15:45,668 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:15:45,685 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-22 02:15:45,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:15:45,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-22 02:15:45,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:15:45,823 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 24 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:15:45,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:15:45,934 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 24 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:15:45,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1149394075] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:15:45,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [838532974] [2022-11-22 02:15:45,936 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2022-11-22 02:15:45,936 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:15:45,936 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:15:45,937 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:15:45,937 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:15:46,041 INFO L321 Elim1Store]: treesize reduction 118, result has 27.2 percent of original size [2022-11-22 02:15:46,041 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 [2022-11-22 02:15:46,073 INFO L321 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2022-11-22 02:15:46,073 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 [2022-11-22 02:15:46,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:15:46,440 INFO L321 Elim1Store]: treesize reduction 52, result has 1.9 percent of original size [2022-11-22 02:15:46,440 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 [2022-11-22 02:15:46,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:15:46,479 INFO L321 Elim1Store]: treesize reduction 52, result has 1.9 percent of original size [2022-11-22 02:15:46,480 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 [2022-11-22 02:15:46,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:15:46,849 INFO L321 Elim1Store]: treesize reduction 52, result has 1.9 percent of original size [2022-11-22 02:15:46,850 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 [2022-11-22 02:15:46,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:15:46,878 INFO L321 Elim1Store]: treesize reduction 52, result has 1.9 percent of original size [2022-11-22 02:15:46,878 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 [2022-11-22 02:15:47,185 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 42 for LOIs [2022-11-22 02:15:47,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:15:47,377 INFO L321 Elim1Store]: treesize reduction 110, result has 28.6 percent of original size [2022-11-22 02:15:47,377 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 [2022-11-22 02:15:47,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:15:47,406 INFO L321 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-11-22 02:15:47,407 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 [2022-11-22 02:15:47,498 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:15:52,110 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 [2022-11-22 02:15:52,110 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:15:52,110 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:15:52,110 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 7 [2022-11-22 02:15:52,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421818832] [2022-11-22 02:15:52,111 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 02:15:52,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-22 02:15:52,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:15:52,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-22 02:15:52,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=513, Unknown=0, NotChecked=0, Total=650 [2022-11-22 02:15:52,112 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) [2022-11-22 02:15:52,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:15:52,277 INFO L93 Difference]: Finished difference Result 267 states and 312 transitions. [2022-11-22 02:15:52,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-22 02:15:52,278 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 [2022-11-22 02:15:52,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:15:52,279 INFO L225 Difference]: With dead ends: 267 [2022-11-22 02:15:52,280 INFO L226 Difference]: Without dead ends: 267 [2022-11-22 02:15:52,280 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=177, Invalid=815, Unknown=0, NotChecked=0, Total=992 [2022-11-22 02:15:52,281 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 85 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:15:52,281 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 189 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-22 02:15:52,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2022-11-22 02:15:52,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 249. [2022-11-22 02:15:52,287 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) [2022-11-22 02:15:52,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 297 transitions. [2022-11-22 02:15:52,289 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 297 transitions. Word has length 48 [2022-11-22 02:15:52,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:15:52,289 INFO L495 AbstractCegarLoop]: Abstraction has 249 states and 297 transitions. [2022-11-22 02:15:52,289 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) [2022-11-22 02:15:52,289 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 297 transitions. [2022-11-22 02:15:52,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-22 02:15:52,290 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:15:52,290 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] [2022-11-22 02:15:52,302 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-22 02:15:52,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-22 02:15:52,497 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)] === [2022-11-22 02:15:52,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:15:52,497 INFO L85 PathProgramCache]: Analyzing trace with hash 1739820872, now seen corresponding path program 1 times [2022-11-22 02:15:52,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:15:52,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766619599] [2022-11-22 02:15:52,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:15:52,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:15:52,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:15:52,770 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-22 02:15:52,770 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:15:52,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766619599] [2022-11-22 02:15:52,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766619599] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:15:52,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598408583] [2022-11-22 02:15:52,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:15:52,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:15:52,772 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:15:52,773 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:15:52,815 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-22 02:15:52,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:15:52,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-22 02:15:52,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:15:53,019 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 02:15:53,019 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 [2022-11-22 02:15:53,056 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-22 02:15:53,057 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:15:53,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598408583] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:15:53,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1976988141] [2022-11-22 02:15:53,124 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2022-11-22 02:15:53,124 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:15:53,124 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:15:53,125 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:15:53,125 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:15:53,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:15:53,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:15:53,355 INFO L321 Elim1Store]: treesize reduction 165, result has 19.9 percent of original size [2022-11-22 02:15:53,356 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 [2022-11-22 02:15:53,453 INFO L321 Elim1Store]: treesize reduction 205, result has 30.0 percent of original size [2022-11-22 02:15:53,454 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 [2022-11-22 02:15:53,788 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 35 for LOIs [2022-11-22 02:15:54,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:15:54,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:15:54,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:15:54,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:15:54,173 INFO L321 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-11-22 02:15:54,173 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 [2022-11-22 02:15:54,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:15:54,238 INFO L321 Elim1Store]: treesize reduction 70, result has 28.6 percent of original size [2022-11-22 02:15:54,239 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 [2022-11-22 02:15:54,444 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:15:58,076 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 [2022-11-22 02:15:58,077 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:15:58,077 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-22 02:15:58,077 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 8 [2022-11-22 02:15:58,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978557736] [2022-11-22 02:15:58,077 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-22 02:15:58,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-22 02:15:58,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:15:58,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-22 02:15:58,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=687, Unknown=0, NotChecked=0, Total=812 [2022-11-22 02:15:58,079 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) [2022-11-22 02:15:58,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:15:58,458 INFO L93 Difference]: Finished difference Result 261 states and 303 transitions. [2022-11-22 02:15:58,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-22 02:15:58,459 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 [2022-11-22 02:15:58,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:15:58,460 INFO L225 Difference]: With dead ends: 261 [2022-11-22 02:15:58,461 INFO L226 Difference]: Without dead ends: 261 [2022-11-22 02:15:58,461 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 78 SyntacticMatches, 9 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=196, Invalid=1136, Unknown=0, NotChecked=0, Total=1332 [2022-11-22 02:15:58,462 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 224 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 02:15:58,462 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [224 Valid, 201 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 02:15:58,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2022-11-22 02:15:58,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 249. [2022-11-22 02:15:58,468 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) [2022-11-22 02:15:58,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 295 transitions. [2022-11-22 02:15:58,470 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 295 transitions. Word has length 49 [2022-11-22 02:15:58,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:15:58,470 INFO L495 AbstractCegarLoop]: Abstraction has 249 states and 295 transitions. [2022-11-22 02:15:58,470 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) [2022-11-22 02:15:58,470 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 295 transitions. [2022-11-22 02:15:58,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-22 02:15:58,471 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:15:58,471 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] [2022-11-22 02:15:58,479 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-22 02:15:58,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-22 02:15:58,679 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)] === [2022-11-22 02:15:58,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:15:58,680 INFO L85 PathProgramCache]: Analyzing trace with hash 276136575, now seen corresponding path program 1 times [2022-11-22 02:15:58,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:15:58,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994875376] [2022-11-22 02:15:58,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:15:58,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:15:58,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:15:59,595 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:15:59,595 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:15:59,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994875376] [2022-11-22 02:15:59,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994875376] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:15:59,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141971194] [2022-11-22 02:15:59,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:15:59,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:15:59,596 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:15:59,596 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:15:59,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-22 02:15:59,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:15:59,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-22 02:15:59,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:15:59,953 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-22 02:15:59,955 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 [2022-11-22 02:16:00,245 INFO L321 Elim1Store]: treesize reduction 30, result has 37.5 percent of original size [2022-11-22 02:16:00,246 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 [2022-11-22 02:16:00,301 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-22 02:16:00,302 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 [2022-11-22 02:16:00,474 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 [2022-11-22 02:16:00,499 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:16:00,499 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:16:00,604 INFO L321 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2022-11-22 02:16:00,605 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 [2022-11-22 02:16:00,925 INFO L321 Elim1Store]: treesize reduction 5, result has 84.8 percent of original size [2022-11-22 02:16:00,925 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 [2022-11-22 02:16:01,310 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 1 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:16:01,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2141971194] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:16:01,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1801126380] [2022-11-22 02:16:01,312 INFO L159 IcfgInterpreter]: Started Sifa with 27 locations of interest [2022-11-22 02:16:01,312 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:16:01,312 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:16:01,312 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:16:01,313 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:16:01,443 INFO L321 Elim1Store]: treesize reduction 46, result has 64.6 percent of original size [2022-11-22 02:16:01,444 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 [2022-11-22 02:16:01,680 INFO L321 Elim1Store]: treesize reduction 118, result has 27.2 percent of original size [2022-11-22 02:16:01,681 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 [2022-11-22 02:16:01,870 INFO L321 Elim1Store]: treesize reduction 136, result has 28.0 percent of original size [2022-11-22 02:16:01,870 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 [2022-11-22 02:16:01,906 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2022-11-22 02:16:01,993 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2022-11-22 02:16:02,399 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 25 for LOIs [2022-11-22 02:16:02,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:16:02,512 INFO L321 Elim1Store]: treesize reduction 110, result has 28.6 percent of original size [2022-11-22 02:16:02,512 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 [2022-11-22 02:16:02,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:16:02,542 INFO L321 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-11-22 02:16:02,542 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 [2022-11-22 02:16:02,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:16:02,683 INFO L321 Elim1Store]: treesize reduction 128, result has 29.3 percent of original size [2022-11-22 02:16:02,683 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 [2022-11-22 02:16:02,769 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:16:07,129 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 [2022-11-22 02:16:07,130 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:16:07,130 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:16:07,130 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 12, 14] total 42 [2022-11-22 02:16:07,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682912014] [2022-11-22 02:16:07,131 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 02:16:07,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-11-22 02:16:07,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:16:07,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-11-22 02:16:07,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=464, Invalid=3318, Unknown=0, NotChecked=0, Total=3782 [2022-11-22 02:16:07,133 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) [2022-11-22 02:16:08,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:16:08,720 INFO L93 Difference]: Finished difference Result 310 states and 359 transitions. [2022-11-22 02:16:08,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-22 02:16:08,721 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 [2022-11-22 02:16:08,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:16:08,723 INFO L225 Difference]: With dead ends: 310 [2022-11-22 02:16:08,723 INFO L226 Difference]: Without dead ends: 310 [2022-11-22 02:16:08,725 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 103 SyntacticMatches, 2 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1798 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=845, Invalid=4705, Unknown=0, NotChecked=0, Total=5550 [2022-11-22 02:16:08,725 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 709 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 441 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 709 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 601 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-22 02:16:08,727 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [709 Valid, 246 Invalid, 601 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 441 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-22 02:16:08,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2022-11-22 02:16:08,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 249. [2022-11-22 02:16:08,736 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) [2022-11-22 02:16:08,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 294 transitions. [2022-11-22 02:16:08,737 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 294 transitions. Word has length 49 [2022-11-22 02:16:08,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:16:08,738 INFO L495 AbstractCegarLoop]: Abstraction has 249 states and 294 transitions. [2022-11-22 02:16:08,738 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) [2022-11-22 02:16:08,738 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 294 transitions. [2022-11-22 02:16:08,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-22 02:16:08,739 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:16:08,739 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] [2022-11-22 02:16:08,752 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-22 02:16:08,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:16:08,946 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)] === [2022-11-22 02:16:08,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:16:08,946 INFO L85 PathProgramCache]: Analyzing trace with hash -1900127767, now seen corresponding path program 1 times [2022-11-22 02:16:08,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:16:08,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061771332] [2022-11-22 02:16:08,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:16:08,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:16:08,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:16:09,294 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-22 02:16:09,295 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:16:09,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061771332] [2022-11-22 02:16:09,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061771332] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:16:09,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317316194] [2022-11-22 02:16:09,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:16:09,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:16:09,296 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:16:09,297 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:16:09,323 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-22 02:16:09,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:16:09,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-22 02:16:09,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:16:09,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:16:09,660 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 [2022-11-22 02:16:09,755 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-22 02:16:09,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:16:09,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1317316194] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:16:09,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1159431145] [2022-11-22 02:16:09,914 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2022-11-22 02:16:09,914 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:16:09,915 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:16:09,915 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:16:09,915 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:16:10,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:16:10,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:16:10,219 INFO L321 Elim1Store]: treesize reduction 148, result has 13.5 percent of original size [2022-11-22 02:16:10,220 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 [2022-11-22 02:16:10,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:16:10,319 INFO L321 Elim1Store]: treesize reduction 174, result has 23.0 percent of original size [2022-11-22 02:16:10,320 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 [2022-11-22 02:16:10,727 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 35 for LOIs [2022-11-22 02:16:10,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:16:10,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:16:10,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:16:10,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:16:10,990 INFO L321 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-11-22 02:16:10,991 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 [2022-11-22 02:16:11,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:16:11,069 INFO L321 Elim1Store]: treesize reduction 70, result has 28.6 percent of original size [2022-11-22 02:16:11,069 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 [2022-11-22 02:16:11,233 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:16:14,322 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 [2022-11-22 02:16:14,322 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:16:14,322 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-22 02:16:14,323 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 13 [2022-11-22 02:16:14,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536556385] [2022-11-22 02:16:14,323 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-22 02:16:14,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-22 02:16:14,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:16:14,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-22 02:16:14,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1099, Unknown=0, NotChecked=0, Total=1260 [2022-11-22 02:16:14,325 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) [2022-11-22 02:16:14,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:16:14,935 INFO L93 Difference]: Finished difference Result 257 states and 296 transitions. [2022-11-22 02:16:14,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-22 02:16:14,936 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 [2022-11-22 02:16:14,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:16:14,937 INFO L225 Difference]: With dead ends: 257 [2022-11-22 02:16:14,938 INFO L226 Difference]: Without dead ends: 257 [2022-11-22 02:16:14,939 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 74 SyntacticMatches, 9 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 822 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=290, Invalid=1690, Unknown=0, NotChecked=0, Total=1980 [2022-11-22 02:16:14,939 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 327 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 327 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 02:16:14,940 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [327 Valid, 192 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 02:16:14,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2022-11-22 02:16:14,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 248. [2022-11-22 02:16:14,947 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) [2022-11-22 02:16:14,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 288 transitions. [2022-11-22 02:16:14,949 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 288 transitions. Word has length 50 [2022-11-22 02:16:14,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:16:14,949 INFO L495 AbstractCegarLoop]: Abstraction has 248 states and 288 transitions. [2022-11-22 02:16:14,950 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) [2022-11-22 02:16:14,950 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 288 transitions. [2022-11-22 02:16:14,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-22 02:16:14,951 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:16:14,951 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] [2022-11-22 02:16:14,967 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-22 02:16:15,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-22 02:16:15,165 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)] === [2022-11-22 02:16:15,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:16:15,165 INFO L85 PathProgramCache]: Analyzing trace with hash -920722335, now seen corresponding path program 1 times [2022-11-22 02:16:15,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:16:15,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281590772] [2022-11-22 02:16:15,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:16:15,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:16:15,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:16:15,740 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:16:15,740 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:16:15,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281590772] [2022-11-22 02:16:15,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281590772] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:16:15,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035001502] [2022-11-22 02:16:15,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:16:15,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:16:15,741 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:16:15,743 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:16:15,779 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-22 02:16:15,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:16:15,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-22 02:16:15,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:16:16,020 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 02:16:16,021 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 [2022-11-22 02:16:16,149 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 [2022-11-22 02:16:16,187 INFO L321 Elim1Store]: treesize reduction 24, result has 38.5 percent of original size [2022-11-22 02:16:16,188 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 [2022-11-22 02:16:16,264 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 12 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 5 not checked. [2022-11-22 02:16:16,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:16:16,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035001502] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:16:16,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1871693037] [2022-11-22 02:16:16,657 INFO L159 IcfgInterpreter]: Started Sifa with 27 locations of interest [2022-11-22 02:16:16,657 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:16:16,658 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:16:16,658 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:16:16,658 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:16:16,801 INFO L321 Elim1Store]: treesize reduction 46, result has 64.6 percent of original size [2022-11-22 02:16:16,801 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 [2022-11-22 02:16:17,072 INFO L321 Elim1Store]: treesize reduction 118, result has 27.2 percent of original size [2022-11-22 02:16:17,073 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 [2022-11-22 02:16:17,279 INFO L321 Elim1Store]: treesize reduction 136, result has 28.0 percent of original size [2022-11-22 02:16:17,279 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 [2022-11-22 02:16:17,303 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2022-11-22 02:16:17,396 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2022-11-22 02:16:17,790 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 25 for LOIs [2022-11-22 02:16:17,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:16:17,898 INFO L321 Elim1Store]: treesize reduction 110, result has 28.6 percent of original size [2022-11-22 02:16:17,898 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 [2022-11-22 02:16:17,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:16:17,923 INFO L321 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-11-22 02:16:17,923 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 [2022-11-22 02:16:18,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:16:18,063 INFO L321 Elim1Store]: treesize reduction 128, result has 29.3 percent of original size [2022-11-22 02:16:18,063 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 [2022-11-22 02:16:18,158 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:16:21,615 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 [2022-11-22 02:16:21,615 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:16:21,615 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-22 02:16:21,615 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2022-11-22 02:16:21,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557709129] [2022-11-22 02:16:21,616 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-22 02:16:21,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-22 02:16:21,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:16:21,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-22 02:16:21,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=1428, Unknown=1, NotChecked=78, Total=1722 [2022-11-22 02:16:21,617 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) [2022-11-22 02:16:22,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:16:22,660 INFO L93 Difference]: Finished difference Result 253 states and 293 transitions. [2022-11-22 02:16:22,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-22 02:16:22,661 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 [2022-11-22 02:16:22,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:16:22,662 INFO L225 Difference]: With dead ends: 253 [2022-11-22 02:16:22,662 INFO L226 Difference]: Without dead ends: 253 [2022-11-22 02:16:22,663 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 101 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 784 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=422, Invalid=2337, Unknown=1, NotChecked=102, Total=2862 [2022-11-22 02:16:22,663 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 316 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 365 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 316 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-22 02:16:22,664 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [316 Valid, 265 Invalid, 472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 365 Invalid, 0 Unknown, 47 Unchecked, 0.3s Time] [2022-11-22 02:16:22,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2022-11-22 02:16:22,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 247. [2022-11-22 02:16:22,671 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) [2022-11-22 02:16:22,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 287 transitions. [2022-11-22 02:16:22,672 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 287 transitions. Word has length 51 [2022-11-22 02:16:22,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:16:22,672 INFO L495 AbstractCegarLoop]: Abstraction has 247 states and 287 transitions. [2022-11-22 02:16:22,673 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) [2022-11-22 02:16:22,673 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 287 transitions. [2022-11-22 02:16:22,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-11-22 02:16:22,674 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:16:22,674 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] [2022-11-22 02:16:22,686 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-22 02:16:22,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:16:22,881 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)] === [2022-11-22 02:16:22,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:16:22,881 INFO L85 PathProgramCache]: Analyzing trace with hash 1822194776, now seen corresponding path program 1 times [2022-11-22 02:16:22,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:16:22,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765720901] [2022-11-22 02:16:22,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:16:22,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:16:22,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:16:23,591 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:16:23,591 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:16:23,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765720901] [2022-11-22 02:16:23,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765720901] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:16:23,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517382685] [2022-11-22 02:16:23,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:16:23,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:16:23,592 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:16:23,594 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:16:23,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-22 02:16:23,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:16:23,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-22 02:16:23,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:16:24,004 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 02:16:24,004 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 [2022-11-22 02:16:24,363 INFO L321 Elim1Store]: treesize reduction 24, result has 38.5 percent of original size [2022-11-22 02:16:24,363 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 [2022-11-22 02:16:24,538 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 [2022-11-22 02:16:24,566 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 12 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:16:24,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:16:24,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [517382685] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:16:24,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [928944836] [2022-11-22 02:16:24,741 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2022-11-22 02:16:24,741 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:16:24,742 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:16:24,742 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:16:24,742 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:16:24,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:16:24,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:16:24,960 INFO L321 Elim1Store]: treesize reduction 165, result has 19.9 percent of original size [2022-11-22 02:16:24,960 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 [2022-11-22 02:16:24,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:16:25,054 INFO L321 Elim1Store]: treesize reduction 187, result has 29.7 percent of original size [2022-11-22 02:16:25,055 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 [2022-11-22 02:16:25,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:16:25,276 INFO L321 Elim1Store]: treesize reduction 240, result has 28.8 percent of original size [2022-11-22 02:16:25,276 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 [2022-11-22 02:16:25,822 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 25 for LOIs [2022-11-22 02:16:26,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:16:26,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:16:26,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:16:26,209 INFO L321 Elim1Store]: treesize reduction 157, result has 20.7 percent of original size [2022-11-22 02:16:26,210 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 [2022-11-22 02:16:26,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:16:26,315 INFO L321 Elim1Store]: treesize reduction 197, result has 30.9 percent of original size [2022-11-22 02:16:26,315 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 [2022-11-22 02:16:26,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:16:26,692 INFO L321 Elim1Store]: treesize reduction 232, result has 29.5 percent of original size [2022-11-22 02:16:26,693 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 [2022-11-22 02:16:27,679 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:16:35,764 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 [2022-11-22 02:16:35,765 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:16:35,765 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-22 02:16:35,765 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 25 [2022-11-22 02:16:35,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770198064] [2022-11-22 02:16:35,765 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-22 02:16:35,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-22 02:16:35,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:16:35,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-22 02:16:35,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=2207, Unknown=6, NotChecked=0, Total=2450 [2022-11-22 02:16:35,767 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) [2022-11-22 02:16:37,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:16:37,467 INFO L93 Difference]: Finished difference Result 318 states and 363 transitions. [2022-11-22 02:16:37,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-22 02:16:37,467 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 [2022-11-22 02:16:37,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:16:37,468 INFO L225 Difference]: With dead ends: 318 [2022-11-22 02:16:37,468 INFO L226 Difference]: Without dead ends: 318 [2022-11-22 02:16:37,469 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 91 SyntacticMatches, 3 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1148 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=528, Invalid=3498, Unknown=6, NotChecked=0, Total=4032 [2022-11-22 02:16:37,470 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 570 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 513 mSolverCounterSat, 109 mSolverCounterUnsat, 17 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 570 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 513 IncrementalHoareTripleChecker+Invalid, 17 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-22 02:16:37,470 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [570 Valid, 220 Invalid, 639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 513 Invalid, 17 Unknown, 0 Unchecked, 0.5s Time] [2022-11-22 02:16:37,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2022-11-22 02:16:37,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 244. [2022-11-22 02:16:37,476 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) [2022-11-22 02:16:37,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 284 transitions. [2022-11-22 02:16:37,477 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 284 transitions. Word has length 57 [2022-11-22 02:16:37,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:16:37,477 INFO L495 AbstractCegarLoop]: Abstraction has 244 states and 284 transitions. [2022-11-22 02:16:37,478 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) [2022-11-22 02:16:37,478 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 284 transitions. [2022-11-22 02:16:37,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-11-22 02:16:37,479 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:16:37,479 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] [2022-11-22 02:16:37,485 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-11-22 02:16:37,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:16:37,685 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)] === [2022-11-22 02:16:37,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:16:37,685 INFO L85 PathProgramCache]: Analyzing trace with hash 631491711, now seen corresponding path program 1 times [2022-11-22 02:16:37,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:16:37,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696227063] [2022-11-22 02:16:37,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:16:37,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:16:37,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:16:37,747 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 30 proven. 2 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-22 02:16:37,747 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:16:37,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696227063] [2022-11-22 02:16:37,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696227063] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:16:37,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775704509] [2022-11-22 02:16:37,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:16:37,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:16:37,748 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:16:37,749 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:16:37,771 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-22 02:16:37,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:16:37,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-22 02:16:37,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:16:37,903 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 30 proven. 2 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-22 02:16:37,903 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:16:37,956 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 30 proven. 2 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-22 02:16:37,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775704509] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:16:37,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1441552333] [2022-11-22 02:16:37,958 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2022-11-22 02:16:37,958 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:16:37,958 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:16:37,958 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:16:37,958 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:16:38,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:16:38,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:16:38,211 INFO L321 Elim1Store]: treesize reduction 165, result has 19.9 percent of original size [2022-11-22 02:16:38,211 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 [2022-11-22 02:16:38,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:16:38,299 INFO L321 Elim1Store]: treesize reduction 187, result has 29.7 percent of original size [2022-11-22 02:16:38,299 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 [2022-11-22 02:16:38,677 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 35 for LOIs [2022-11-22 02:16:39,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:16:39,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:16:39,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:16:39,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:16:39,014 INFO L321 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-11-22 02:16:39,015 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 [2022-11-22 02:16:39,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:16:39,072 INFO L321 Elim1Store]: treesize reduction 70, result has 28.6 percent of original size [2022-11-22 02:16:39,072 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 [2022-11-22 02:16:39,342 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:16:42,590 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 [2022-11-22 02:16:42,591 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:16:42,591 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:16:42,591 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 3 [2022-11-22 02:16:42,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710785963] [2022-11-22 02:16:42,591 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 02:16:42,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 02:16:42,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:16:42,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 02:16:42,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=355, Unknown=0, NotChecked=0, Total=462 [2022-11-22 02:16:42,592 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) [2022-11-22 02:16:42,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:16:42,629 INFO L93 Difference]: Finished difference Result 249 states and 288 transitions. [2022-11-22 02:16:42,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 02:16:42,630 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 [2022-11-22 02:16:42,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:16:42,631 INFO L225 Difference]: With dead ends: 249 [2022-11-22 02:16:42,631 INFO L226 Difference]: Without dead ends: 249 [2022-11-22 02:16:42,632 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 147 SyntacticMatches, 10 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=113, Invalid=393, Unknown=0, NotChecked=0, Total=506 [2022-11-22 02:16:42,632 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 [2022-11-22 02:16:42,632 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] [2022-11-22 02:16:42,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2022-11-22 02:16:42,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 242. [2022-11-22 02:16:42,638 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) [2022-11-22 02:16:42,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 281 transitions. [2022-11-22 02:16:42,639 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 281 transitions. Word has length 58 [2022-11-22 02:16:42,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:16:42,640 INFO L495 AbstractCegarLoop]: Abstraction has 242 states and 281 transitions. [2022-11-22 02:16:42,640 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) [2022-11-22 02:16:42,640 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 281 transitions. [2022-11-22 02:16:42,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-11-22 02:16:42,641 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:16:42,641 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] [2022-11-22 02:16:42,655 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-11-22 02:16:42,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:16:42,848 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)] === [2022-11-22 02:16:42,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:16:42,848 INFO L85 PathProgramCache]: Analyzing trace with hash 635004488, now seen corresponding path program 1 times [2022-11-22 02:16:42,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:16:42,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123900249] [2022-11-22 02:16:42,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:16:42,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:16:42,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:16:43,165 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 24 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:16:43,165 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:16:43,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123900249] [2022-11-22 02:16:43,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123900249] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:16:43,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321713701] [2022-11-22 02:16:43,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:16:43,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:16:43,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:16:43,167 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:16:43,191 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-22 02:16:43,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:16:43,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-22 02:16:43,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:16:43,303 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 [2022-11-22 02:16:43,446 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-22 02:16:43,446 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 [2022-11-22 02:16:43,472 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-22 02:16:43,472 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 [2022-11-22 02:16:43,488 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 26 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:16:43,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:16:43,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321713701] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:16:43,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1656612052] [2022-11-22 02:16:43,572 INFO L159 IcfgInterpreter]: Started Sifa with 27 locations of interest [2022-11-22 02:16:43,572 INFO L166 IcfgInterpreter]: Building call graph [2022-11-22 02:16:43,572 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-22 02:16:43,572 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-22 02:16:43,572 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-22 02:16:43,664 INFO L321 Elim1Store]: treesize reduction 118, result has 27.2 percent of original size [2022-11-22 02:16:43,665 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 [2022-11-22 02:16:43,684 INFO L321 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2022-11-22 02:16:43,684 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 [2022-11-22 02:16:43,794 INFO L321 Elim1Store]: treesize reduction 136, result has 28.0 percent of original size [2022-11-22 02:16:43,794 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 [2022-11-22 02:16:44,083 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 25 for LOIs [2022-11-22 02:16:44,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:16:44,195 INFO L321 Elim1Store]: treesize reduction 46, result has 62.3 percent of original size [2022-11-22 02:16:44,195 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 [2022-11-22 02:16:44,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:16:44,332 INFO L321 Elim1Store]: treesize reduction 110, result has 28.6 percent of original size [2022-11-22 02:16:44,332 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 [2022-11-22 02:16:44,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:16:44,469 INFO L321 Elim1Store]: treesize reduction 128, result has 29.3 percent of original size [2022-11-22 02:16:44,469 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 [2022-11-22 02:16:44,495 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2022-11-22 02:16:44,542 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2022-11-22 02:16:44,580 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2022-11-22 02:16:44,650 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-22 02:16:48,199 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 [2022-11-22 02:16:48,199 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-22 02:16:48,199 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-22 02:16:48,199 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2022-11-22 02:16:48,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209280986] [2022-11-22 02:16:48,200 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-22 02:16:48,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-22 02:16:48,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:16:48,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-22 02:16:48,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=785, Unknown=0, NotChecked=0, Total=930 [2022-11-22 02:16:48,201 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) [2022-11-22 02:16:48,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:16:48,537 INFO L93 Difference]: Finished difference Result 294 states and 339 transitions. [2022-11-22 02:16:48,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-22 02:16:48,538 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 [2022-11-22 02:16:48,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:16:48,539 INFO L225 Difference]: With dead ends: 294 [2022-11-22 02:16:48,539 INFO L226 Difference]: Without dead ends: 294 [2022-11-22 02:16:48,540 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 118 SyntacticMatches, 7 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=184, Invalid=1076, Unknown=0, NotChecked=0, Total=1260 [2022-11-22 02:16:48,540 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 66 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 02:16:48,541 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 224 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 02:16:48,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2022-11-22 02:16:48,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 282. [2022-11-22 02:16:48,546 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) [2022-11-22 02:16:48,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 328 transitions. [2022-11-22 02:16:48,547 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 328 transitions. Word has length 62 [2022-11-22 02:16:48,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:16:48,548 INFO L495 AbstractCegarLoop]: Abstraction has 282 states and 328 transitions. [2022-11-22 02:16:48,548 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) [2022-11-22 02:16:48,548 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 328 transitions. [2022-11-22 02:16:48,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-22 02:16:48,549 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:16:48,549 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] [2022-11-22 02:16:48,563 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-11-22 02:16:48,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-11-22 02:16:48,755 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)] === [2022-11-22 02:16:48,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:16:48,756 INFO L85 PathProgramCache]: Analyzing trace with hash 476729907, now seen corresponding path program 1 times [2022-11-22 02:16:48,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:16:48,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162252790] [2022-11-22 02:16:48,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:16:48,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:16:48,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:16:48,888 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 33 proven. 2 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-22 02:16:48,889 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:16:48,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162252790] [2022-11-22 02:16:48,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162252790] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:16:48,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762268693] [2022-11-22 02:16:48,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:16:48,890 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:16:48,890 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:16:48,891 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:16:48,915 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-11-22 02:16:49,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:16:49,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-22 02:16:49,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:16:49,106 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 33 proven. 2 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-22 02:16:49,107 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:16:49,267 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-22 02:16:49,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1762268693] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-22 02:16:49,267 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-22 02:16:49,268 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4, 5] total 9 [2022-11-22 02:16:49,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403222705] [2022-11-22 02:16:49,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:16:49,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-22 02:16:49,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:16:49,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-22 02:16:49,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-11-22 02:16:49,270 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) [2022-11-22 02:16:49,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:16:49,344 INFO L93 Difference]: Finished difference Result 258 states and 294 transitions. [2022-11-22 02:16:49,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-22 02:16:49,345 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 [2022-11-22 02:16:49,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:16:49,348 INFO L225 Difference]: With dead ends: 258 [2022-11-22 02:16:49,348 INFO L226 Difference]: Without dead ends: 250 [2022-11-22 02:16:49,348 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2022-11-22 02:16:49,349 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 61 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-22 02:16:49,349 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 155 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-22 02:16:49,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2022-11-22 02:16:49,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 196. [2022-11-22 02:16:49,356 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) [2022-11-22 02:16:49,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 225 transitions. [2022-11-22 02:16:49,357 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 225 transitions. Word has length 63 [2022-11-22 02:16:49,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:16:49,358 INFO L495 AbstractCegarLoop]: Abstraction has 196 states and 225 transitions. [2022-11-22 02:16:49,358 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) [2022-11-22 02:16:49,358 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 225 transitions. [2022-11-22 02:16:49,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-11-22 02:16:49,359 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:16:49,359 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] [2022-11-22 02:16:49,375 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-11-22 02:16:49,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-11-22 02:16:49,565 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)] === [2022-11-22 02:16:49,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:16:49,565 INFO L85 PathProgramCache]: Analyzing trace with hash 1831591415, now seen corresponding path program 1 times [2022-11-22 02:16:49,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:16:49,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985721774] [2022-11-22 02:16:49,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:16:49,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:16:49,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-22 02:16:49,603 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-22 02:16:49,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-22 02:16:49,652 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-22 02:16:49,653 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-22 02:16:49,654 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK (19 of 20 remaining) [2022-11-22 02:16:49,656 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 20 remaining) [2022-11-22 02:16:49,656 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 20 remaining) [2022-11-22 02:16:49,656 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (16 of 20 remaining) [2022-11-22 02:16:49,656 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (15 of 20 remaining) [2022-11-22 02:16:49,657 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE (14 of 20 remaining) [2022-11-22 02:16:49,657 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE (13 of 20 remaining) [2022-11-22 02:16:49,657 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 20 remaining) [2022-11-22 02:16:49,657 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 20 remaining) [2022-11-22 02:16:49,657 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 20 remaining) [2022-11-22 02:16:49,657 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 20 remaining) [2022-11-22 02:16:49,658 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr10ASSERT_VIOLATIONMEMORY_FREE (8 of 20 remaining) [2022-11-22 02:16:49,658 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr11ASSERT_VIOLATIONMEMORY_FREE (7 of 20 remaining) [2022-11-22 02:16:49,658 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr12ASSERT_VIOLATIONMEMORY_FREE (6 of 20 remaining) [2022-11-22 02:16:49,658 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr13ASSERT_VIOLATIONMEMORY_FREE (5 of 20 remaining) [2022-11-22 02:16:49,658 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr14ASSERT_VIOLATIONMEMORY_FREE (4 of 20 remaining) [2022-11-22 02:16:49,659 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr15ASSERT_VIOLATIONMEMORY_FREE (3 of 20 remaining) [2022-11-22 02:16:49,659 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr16ASSERT_VIOLATIONMEMORY_FREE (2 of 20 remaining) [2022-11-22 02:16:49,659 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr17ASSERT_VIOLATIONMEMORY_FREE (1 of 20 remaining) [2022-11-22 02:16:49,659 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr18ASSERT_VIOLATIONMEMORY_FREE (0 of 20 remaining) [2022-11-22 02:16:49,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-11-22 02:16:49,663 INFO L444 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] [2022-11-22 02:16:49,667 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-22 02:16:49,755 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.11 02:16:49 BoogieIcfgContainer [2022-11-22 02:16:49,756 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-22 02:16:49,756 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-22 02:16:49,756 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-22 02:16:49,757 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-22 02:16:49,757 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:13:11" (3/4) ... [2022-11-22 02:16:49,761 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-11-22 02:16:49,761 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-22 02:16:49,761 INFO L158 Benchmark]: Toolchain (without parser) took 219728.07ms. Allocated memory was 136.3MB in the beginning and 264.2MB in the end (delta: 127.9MB). Free memory was 104.5MB in the beginning and 169.6MB in the end (delta: -65.1MB). Peak memory consumption was 63.3MB. Max. memory is 16.1GB. [2022-11-22 02:16:49,762 INFO L158 Benchmark]: CDTParser took 0.25ms. Allocated memory is still 136.3MB. Free memory is still 83.7MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-22 02:16:49,762 INFO L158 Benchmark]: CACSL2BoogieTranslator took 590.04ms. Allocated memory is still 136.3MB. Free memory was 104.1MB in the beginning and 84.8MB in the end (delta: 19.3MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. [2022-11-22 02:16:49,762 INFO L158 Benchmark]: Boogie Procedure Inliner took 45.12ms. Allocated memory is still 136.3MB. Free memory was 84.8MB in the beginning and 82.6MB in the end (delta: 2.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-22 02:16:49,762 INFO L158 Benchmark]: Boogie Preprocessor took 29.87ms. Allocated memory is still 136.3MB. Free memory was 82.6MB in the beginning and 81.0MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-22 02:16:49,766 INFO L158 Benchmark]: RCFGBuilder took 566.88ms. Allocated memory is still 136.3MB. Free memory was 81.0MB in the beginning and 63.8MB in the end (delta: 17.2MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2022-11-22 02:16:49,766 INFO L158 Benchmark]: TraceAbstraction took 218483.05ms. Allocated memory was 136.3MB in the beginning and 264.2MB in the end (delta: 127.9MB). Free memory was 63.0MB in the beginning and 170.7MB in the end (delta: -107.7MB). Peak memory consumption was 23.4MB. Max. memory is 16.1GB. [2022-11-22 02:16:49,766 INFO L158 Benchmark]: Witness Printer took 4.86ms. Allocated memory is still 264.2MB. Free memory was 170.7MB in the beginning and 169.6MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-22 02:16:49,767 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25ms. Allocated memory is still 136.3MB. Free memory is still 83.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 590.04ms. Allocated memory is still 136.3MB. Free memory was 104.1MB in the beginning and 84.8MB in the end (delta: 19.3MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 45.12ms. Allocated memory is still 136.3MB. Free memory was 84.8MB in the beginning and 82.6MB in the end (delta: 2.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 29.87ms. Allocated memory is still 136.3MB. Free memory was 82.6MB in the beginning and 81.0MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 566.88ms. Allocated memory is still 136.3MB. Free memory was 81.0MB in the beginning and 63.8MB in the end (delta: 17.2MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * TraceAbstraction took 218483.05ms. Allocated memory was 136.3MB in the beginning and 264.2MB in the end (delta: 127.9MB). Free memory was 63.0MB in the beginning and 170.7MB in the end (delta: -107.7MB). Peak memory consumption was 23.4MB. Max. memory is 16.1GB. * Witness Printer took 4.86ms. Allocated memory is still 264.2MB. Free memory was 170.7MB in the beginning and 169.6MB in the end (delta: 1.0MB). 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, \old(global)=0, \old(state)=0, commands={6:0}, global={0:0}, state=0] [L692] int i = 0; VAL [\old(global)=0, \old(global)=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, \old(global)=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, \old(global)=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, \old(global)=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, \old(global)=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, \old(global)=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, \old(global)=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, \old(global)=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, \old(global)=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, \old(global)=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, \old(global)=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, \old(global)=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, \old(global)=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, \old(global)=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, \old(global)=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, \old(global)=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, \old(global)=0, \old(state)=0, commands={6:0}, global={0:0}, state=0] [L692] int i = 0; VAL [\old(global)=0, \old(global)=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, \old(global)=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, \old(global)=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, \old(global)=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, \old(global)=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, \old(global)=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, \old(global)=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, \old(global)=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, \old(global)=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, \old(global)=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, \old(global)=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, \old(global)=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, \old(global)=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, \old(global)=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, \old(global)=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, \old(global)=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, \old(global)=0, \old(state)=0, commands={6:0}, global={0:0}, state=0] [L692] int i = 0; VAL [\old(global)=0, \old(global)=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, \old(global)=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, \old(global)=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, \old(global)=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, \old(global)=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, \old(global)=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, \old(global)=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, \old(global)=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, \old(global)=0, \old(state)=0, commands={6:0}, global={0:0}, state=0, x={-3:0}] [L706] COND FALSE !(\read(*global)) VAL [\old(global)=0, \old(global)=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, \old(global)=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: 218.3s, OverallIterations: 35, TraceHistogramMax: 5, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 19.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 27 mSolverCounterUnknown, 8493 SdHoareTripleChecker+Valid, 8.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 8492 mSDsluCounter, 6567 SdHoareTripleChecker+Invalid, 7.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 47 IncrementalHoareTripleChecker+Unchecked, 4954 mSDsCounter, 1086 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 6578 IncrementalHoareTripleChecker+Invalid, 7738 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1086 mSolverCounterUnsat, 1613 mSDtfsCounter, 6578 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2970 GetRequests, 1965 SyntacticMatches, 79 SemanticMatches, 926 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 12904 ImplicationChecksByTransitivity, 150.6s 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: 0.5s AutomataMinimizationTime, 34 MinimizatonAttempts, 1441 StatesRemovedByMinimization, 34 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.4s SatisfiabilityAnalysisTime, 20.2s 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: 4.5s, ICFG_INTERPRETER_ENTERED_PROCEDURES: 6, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 58, DAG_INTERPRETER_EARLY_EXITS: 0, TOOLS_POST_APPLICATIONS: 141, TOOLS_POST_TIME: 3.4s, TOOLS_POST_CALL_APPLICATIONS: 9, TOOLS_POST_CALL_TIME: 0.4s, TOOLS_POST_RETURN_APPLICATIONS: 4, TOOLS_POST_RETURN_TIME: 0.3s, TOOLS_QUANTIFIERELIM_APPLICATIONS: 154, TOOLS_QUANTIFIERELIM_TIME: 4.1s, TOOLS_QUANTIFIERELIM_MAX_TIME: 0.4s, FLUID_QUERY_TIME: 0.0s, FLUID_QUERIES: 236, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 10, DOMAIN_JOIN_TIME: 0.2s, 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: 1.3s, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME: 1.3s, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 6, CALL_SUMMARIZER_APPLICATIONS: 4, CALL_SUMMARIZER_CACHE_MISSES: 2, CALL_SUMMARIZER_OVERALL_TIME: 0.5s, CALL_SUMMARIZER_NEW_COMPUTATION_TIME: 0.5s, 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 [2022-11-22 02:16:49,795 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, 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_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-bftpd/bftpd_2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/config/svcomp-MemCleanup-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-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-b5237d8 [2022-11-22 02:16:52,219 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-22 02:16:52,222 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-22 02:16:52,262 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-22 02:16:52,264 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-22 02:16:52,268 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-22 02:16:52,271 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-22 02:16:52,275 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-22 02:16:52,277 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-22 02:16:52,282 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-22 02:16:52,284 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-22 02:16:52,286 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-22 02:16:52,287 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-22 02:16:52,290 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-22 02:16:52,291 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-22 02:16:52,292 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-22 02:16:52,293 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-22 02:16:52,294 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-22 02:16:52,296 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-22 02:16:52,297 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-22 02:16:52,299 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-22 02:16:52,300 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-22 02:16:52,301 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-22 02:16:52,302 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-22 02:16:52,306 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-22 02:16:52,306 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-22 02:16:52,306 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-22 02:16:52,307 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-22 02:16:52,308 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-22 02:16:52,309 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-22 02:16:52,309 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-22 02:16:52,310 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-22 02:16:52,310 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-22 02:16:52,311 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-22 02:16:52,312 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-22 02:16:52,313 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-22 02:16:52,313 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-22 02:16:52,314 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-22 02:16:52,314 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-22 02:16:52,315 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-22 02:16:52,316 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-22 02:16:52,317 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/config/svcomp-MemCleanup-32bit-Taipan_Bitvector.epf [2022-11-22 02:16:52,338 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-22 02:16:52,339 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-22 02:16:52,339 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-22 02:16:52,339 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-22 02:16:52,340 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-22 02:16:52,340 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-22 02:16:52,341 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-22 02:16:52,341 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-22 02:16:52,341 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-22 02:16:52,342 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-22 02:16:52,342 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-22 02:16:52,342 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-22 02:16:52,343 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-22 02:16:52,343 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-22 02:16:52,344 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-22 02:16:52,344 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-22 02:16:52,344 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-22 02:16:52,344 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-22 02:16:52,345 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-22 02:16:52,345 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-22 02:16:52,345 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-22 02:16:52,345 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-22 02:16:52,346 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-22 02:16:52,346 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-22 02:16:52,346 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-22 02:16:52,347 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-22 02:16:52,347 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-22 02:16:52,347 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-22 02:16:52,347 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-22 02:16:52,348 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-22 02:16:52,348 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-22 02:16:52,348 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 02:16:52,349 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-22 02:16:52,349 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-22 02:16:52,349 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-22 02:16:52,349 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-22 02:16:52,350 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-22 02:16:52,350 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-22 02:16:52,350 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_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-memcleanup) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7c883b81b24ce5a721aa9a1ff13aef8a0d532ba87d9e130e470a0b88a1f8e93e [2022-11-22 02:16:52,686 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-22 02:16:52,719 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-22 02:16:52,722 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-22 02:16:52,724 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-22 02:16:52,725 INFO L275 PluginConnector]: CDTParser initialized [2022-11-22 02:16:52,727 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/../../sv-benchmarks/c/memsafety-bftpd/bftpd_2.i [2022-11-22 02:16:55,918 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-22 02:16:56,245 INFO L351 CDTParser]: Found 1 translation units. [2022-11-22 02:16:56,245 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/sv-benchmarks/c/memsafety-bftpd/bftpd_2.i [2022-11-22 02:16:56,259 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/data/d6f98831b/d754a6b928ec4ac1ba3ef0b283cb063a/FLAG08beaccf9 [2022-11-22 02:16:56,279 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/data/d6f98831b/d754a6b928ec4ac1ba3ef0b283cb063a [2022-11-22 02:16:56,281 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-22 02:16:56,283 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-22 02:16:56,284 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-22 02:16:56,284 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-22 02:16:56,288 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-22 02:16:56,289 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 02:16:56" (1/1) ... [2022-11-22 02:16:56,290 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19ce4f34 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:16:56, skipping insertion in model container [2022-11-22 02:16:56,290 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 02:16:56" (1/1) ... [2022-11-22 02:16:56,297 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-22 02:16:56,349 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-22 02:16:56,754 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 02:16:56,773 INFO L203 MainTranslator]: Completed pre-run [2022-11-22 02:16:56,809 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 02:16:56,913 INFO L208 MainTranslator]: Completed translation [2022-11-22 02:16:56,914 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:16:56 WrapperNode [2022-11-22 02:16:56,914 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-22 02:16:56,915 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-22 02:16:56,915 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-22 02:16:56,915 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-22 02:16:56,923 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:16:56" (1/1) ... [2022-11-22 02:16:56,955 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:16:56" (1/1) ... [2022-11-22 02:16:56,994 INFO L138 Inliner]: procedures = 169, calls = 42, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 96 [2022-11-22 02:16:56,995 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-22 02:16:56,995 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-22 02:16:56,995 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-22 02:16:56,996 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-22 02:16:57,006 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:16:56" (1/1) ... [2022-11-22 02:16:57,007 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:16:56" (1/1) ... [2022-11-22 02:16:57,027 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:16:56" (1/1) ... [2022-11-22 02:16:57,027 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:16:56" (1/1) ... [2022-11-22 02:16:57,035 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:16:56" (1/1) ... [2022-11-22 02:16:57,039 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:16:56" (1/1) ... [2022-11-22 02:16:57,041 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:16:56" (1/1) ... [2022-11-22 02:16:57,042 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:16:56" (1/1) ... [2022-11-22 02:16:57,045 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-22 02:16:57,046 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-22 02:16:57,047 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-22 02:16:57,047 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-22 02:16:57,048 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:16:56" (1/1) ... [2022-11-22 02:16:57,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 02:16:57,081 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:16:57,105 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-22 02:16:57,113 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-22 02:16:57,154 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2022-11-22 02:16:57,155 INFO L130 BoogieDeclarations]: Found specification of procedure parse_input [2022-11-22 02:16:57,156 INFO L138 BoogieDeclarations]: Found implementation of procedure parse_input [2022-11-22 02:16:57,156 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-22 02:16:57,156 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-22 02:16:57,161 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-22 02:16:57,161 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-22 02:16:57,161 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-22 02:16:57,161 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-22 02:16:57,162 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-22 02:16:57,162 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-22 02:16:57,308 INFO L235 CfgBuilder]: Building ICFG [2022-11-22 02:16:57,310 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-22 02:16:57,778 INFO L276 CfgBuilder]: Performing block encoding [2022-11-22 02:16:57,796 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-22 02:16:57,797 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-22 02:16:57,799 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:16:57 BoogieIcfgContainer [2022-11-22 02:16:57,799 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-22 02:16:57,801 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-22 02:16:57,803 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-22 02:16:57,806 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-22 02:16:57,806 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 02:16:56" (1/3) ... [2022-11-22 02:16:57,807 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f9bade7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 02:16:57, skipping insertion in model container [2022-11-22 02:16:57,808 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:16:56" (2/3) ... [2022-11-22 02:16:57,808 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f9bade7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 02:16:57, skipping insertion in model container [2022-11-22 02:16:57,809 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:16:57" (3/3) ... [2022-11-22 02:16:57,811 INFO L112 eAbstractionObserver]: Analyzing ICFG bftpd_2.i [2022-11-22 02:16:57,830 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-22 02:16:57,830 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 20 error locations. [2022-11-22 02:16:57,896 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-22 02:16:57,903 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;@1f6a3cbd, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-22 02:16:57,904 INFO L358 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2022-11-22 02:16:57,908 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) [2022-11-22 02:16:57,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-22 02:16:57,916 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:16:57,917 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-22 02:16:57,918 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)] === [2022-11-22 02:16:57,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:16:57,926 INFO L85 PathProgramCache]: Analyzing trace with hash -772449407, now seen corresponding path program 1 times [2022-11-22 02:16:57,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 02:16:57,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [183050641] [2022-11-22 02:16:57,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:16:57,943 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 [2022-11-22 02:16:57,943 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 02:16:57,948 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/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) [2022-11-22 02:16:57,994 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/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 [2022-11-22 02:16:58,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:16:58,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-22 02:16:58,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:16:58,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:16:58,267 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:16:58,268 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 02:16:58,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [183050641] [2022-11-22 02:16:58,269 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [183050641] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:16:58,269 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:16:58,269 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-22 02:16:58,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313798691] [2022-11-22 02:16:58,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:16:58,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:16:58,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 02:16:58,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:16:58,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:16:58,307 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) [2022-11-22 02:16:58,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:16:58,476 INFO L93 Difference]: Finished difference Result 110 states and 128 transitions. [2022-11-22 02:16:58,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:16:58,479 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 [2022-11-22 02:16:58,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:16:58,489 INFO L225 Difference]: With dead ends: 110 [2022-11-22 02:16:58,489 INFO L226 Difference]: Without dead ends: 106 [2022-11-22 02:16:58,491 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 [2022-11-22 02:16:58,494 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 [2022-11-22 02:16:58,495 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] [2022-11-22 02:16:58,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-11-22 02:16:58,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 84. [2022-11-22 02:16:58,550 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) [2022-11-22 02:16:58,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 110 transitions. [2022-11-22 02:16:58,561 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 110 transitions. Word has length 6 [2022-11-22 02:16:58,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:16:58,562 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 110 transitions. [2022-11-22 02:16:58,562 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) [2022-11-22 02:16:58,563 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 110 transitions. [2022-11-22 02:16:58,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-22 02:16:58,564 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:16:58,564 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-22 02:16:58,583 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/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 [2022-11-22 02:16:58,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/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 [2022-11-22 02:16:58,780 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)] === [2022-11-22 02:16:58,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:16:58,781 INFO L85 PathProgramCache]: Analyzing trace with hash -772449406, now seen corresponding path program 1 times [2022-11-22 02:16:58,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 02:16:58,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1133372232] [2022-11-22 02:16:58,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:16:58,782 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 [2022-11-22 02:16:58,783 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 02:16:58,784 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/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) [2022-11-22 02:16:58,844 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/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 [2022-11-22 02:16:58,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:16:58,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-22 02:16:58,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:16:59,007 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:16:59,008 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:16:59,008 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 02:16:59,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1133372232] [2022-11-22 02:16:59,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1133372232] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:16:59,009 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:16:59,009 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-22 02:16:59,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885681665] [2022-11-22 02:16:59,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:16:59,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 02:16:59,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 02:16:59,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 02:16:59,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-22 02:16:59,021 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) [2022-11-22 02:16:59,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:16:59,255 INFO L93 Difference]: Finished difference Result 206 states and 278 transitions. [2022-11-22 02:16:59,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 02:16:59,257 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 [2022-11-22 02:16:59,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:16:59,259 INFO L225 Difference]: With dead ends: 206 [2022-11-22 02:16:59,259 INFO L226 Difference]: Without dead ends: 206 [2022-11-22 02:16:59,259 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 [2022-11-22 02:16:59,260 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 126 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 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 [2022-11-22 02:16:59,261 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 142 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 02:16:59,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-11-22 02:16:59,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 152. [2022-11-22 02:16:59,278 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) [2022-11-22 02:16:59,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 238 transitions. [2022-11-22 02:16:59,280 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 238 transitions. Word has length 6 [2022-11-22 02:16:59,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:16:59,281 INFO L495 AbstractCegarLoop]: Abstraction has 152 states and 238 transitions. [2022-11-22 02:16:59,281 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) [2022-11-22 02:16:59,281 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 238 transitions. [2022-11-22 02:16:59,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-22 02:16:59,282 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:16:59,282 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:16:59,300 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/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)] Forceful destruction successful, exit code 0 [2022-11-22 02:16:59,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/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 [2022-11-22 02:16:59,494 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)] === [2022-11-22 02:16:59,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:16:59,494 INFO L85 PathProgramCache]: Analyzing trace with hash 1823872140, now seen corresponding path program 1 times [2022-11-22 02:16:59,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 02:16:59,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [497438460] [2022-11-22 02:16:59,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:16:59,495 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 [2022-11-22 02:16:59,496 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 02:16:59,497 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/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) [2022-11-22 02:16:59,515 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/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 [2022-11-22 02:16:59,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:16:59,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-22 02:16:59,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:16:59,705 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 [2022-11-22 02:16:59,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:16:59,720 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:16:59,720 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 02:16:59,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [497438460] [2022-11-22 02:16:59,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [497438460] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:16:59,721 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:16:59,721 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 02:16:59,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389174818] [2022-11-22 02:16:59,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:16:59,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 02:16:59,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 02:16:59,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 02:16:59,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-22 02:16:59,723 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) [2022-11-22 02:17:00,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:17:00,036 INFO L93 Difference]: Finished difference Result 228 states and 325 transitions. [2022-11-22 02:17:00,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 02:17:00,037 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 [2022-11-22 02:17:00,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:17:00,039 INFO L225 Difference]: With dead ends: 228 [2022-11-22 02:17:00,040 INFO L226 Difference]: Without dead ends: 228 [2022-11-22 02:17:00,040 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 [2022-11-22 02:17:00,041 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 137 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 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, 0.3s IncrementalHoareTripleChecker+Time [2022-11-22 02:17:00,041 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 164 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-22 02:17:00,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2022-11-22 02:17:00,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 155. [2022-11-22 02:17:00,069 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) [2022-11-22 02:17:00,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 241 transitions. [2022-11-22 02:17:00,073 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 241 transitions. Word has length 7 [2022-11-22 02:17:00,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:17:00,073 INFO L495 AbstractCegarLoop]: Abstraction has 155 states and 241 transitions. [2022-11-22 02:17:00,074 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) [2022-11-22 02:17:00,074 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 241 transitions. [2022-11-22 02:17:00,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-22 02:17:00,074 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:17:00,074 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:17:00,086 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/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 [2022-11-22 02:17:00,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/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 [2022-11-22 02:17:00,275 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)] === [2022-11-22 02:17:00,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:17:00,276 INFO L85 PathProgramCache]: Analyzing trace with hash 705461537, now seen corresponding path program 1 times [2022-11-22 02:17:00,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 02:17:00,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [60310080] [2022-11-22 02:17:00,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:17:00,277 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 [2022-11-22 02:17:00,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 02:17:00,278 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/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) [2022-11-22 02:17:00,302 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/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 [2022-11-22 02:17:00,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:17:00,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-22 02:17:00,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:17:00,483 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 [2022-11-22 02:17:00,488 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 [2022-11-22 02:17:00,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:17:00,513 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:17:00,513 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 02:17:00,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [60310080] [2022-11-22 02:17:00,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [60310080] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:17:00,518 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:17:00,519 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 02:17:00,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744611248] [2022-11-22 02:17:00,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:17:00,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 02:17:00,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 02:17:00,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 02:17:00,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-22 02:17:00,521 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) [2022-11-22 02:17:00,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:17:00,821 INFO L93 Difference]: Finished difference Result 208 states and 279 transitions. [2022-11-22 02:17:00,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 02:17:00,822 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 [2022-11-22 02:17:00,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:17:00,823 INFO L225 Difference]: With dead ends: 208 [2022-11-22 02:17:00,823 INFO L226 Difference]: Without dead ends: 208 [2022-11-22 02:17:00,824 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-22 02:17:00,825 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 129 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 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 [2022-11-22 02:17:00,825 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 190 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 02:17:00,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2022-11-22 02:17:00,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 155. [2022-11-22 02:17:00,839 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) [2022-11-22 02:17:00,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 239 transitions. [2022-11-22 02:17:00,841 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 239 transitions. Word has length 8 [2022-11-22 02:17:00,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:17:00,841 INFO L495 AbstractCegarLoop]: Abstraction has 155 states and 239 transitions. [2022-11-22 02:17:00,842 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) [2022-11-22 02:17:00,842 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 239 transitions. [2022-11-22 02:17:00,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-22 02:17:00,842 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:17:00,843 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:17:00,863 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/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 [2022-11-22 02:17:01,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/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 [2022-11-22 02:17:01,054 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)] === [2022-11-22 02:17:01,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:17:01,055 INFO L85 PathProgramCache]: Analyzing trace with hash 394471214, now seen corresponding path program 1 times [2022-11-22 02:17:01,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 02:17:01,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1795733099] [2022-11-22 02:17:01,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:17:01,056 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 [2022-11-22 02:17:01,056 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 02:17:01,057 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/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) [2022-11-22 02:17:01,062 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/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 [2022-11-22 02:17:01,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:17:01,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-22 02:17:01,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:17:01,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:17:01,217 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:17:01,217 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 02:17:01,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1795733099] [2022-11-22 02:17:01,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1795733099] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:17:01,218 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:17:01,218 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 02:17:01,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872896279] [2022-11-22 02:17:01,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:17:01,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 02:17:01,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 02:17:01,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 02:17:01,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-22 02:17:01,220 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) [2022-11-22 02:17:01,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:17:01,397 INFO L93 Difference]: Finished difference Result 234 states and 321 transitions. [2022-11-22 02:17:01,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 02:17:01,399 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 [2022-11-22 02:17:01,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:17:01,400 INFO L225 Difference]: With dead ends: 234 [2022-11-22 02:17:01,400 INFO L226 Difference]: Without dead ends: 234 [2022-11-22 02:17:01,400 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 [2022-11-22 02:17:01,401 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 140 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 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, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 02:17:01,402 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 183 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 02:17:01,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2022-11-22 02:17:01,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 191. [2022-11-22 02:17:01,430 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) [2022-11-22 02:17:01,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 289 transitions. [2022-11-22 02:17:01,433 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 289 transitions. Word has length 9 [2022-11-22 02:17:01,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:17:01,433 INFO L495 AbstractCegarLoop]: Abstraction has 191 states and 289 transitions. [2022-11-22 02:17:01,433 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) [2022-11-22 02:17:01,433 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 289 transitions. [2022-11-22 02:17:01,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-22 02:17:01,434 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:17:01,434 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:17:01,455 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/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 [2022-11-22 02:17:01,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/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 [2022-11-22 02:17:01,656 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)] === [2022-11-22 02:17:01,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:17:01,656 INFO L85 PathProgramCache]: Analyzing trace with hash -656294205, now seen corresponding path program 1 times [2022-11-22 02:17:01,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 02:17:01,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [826612986] [2022-11-22 02:17:01,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:17:01,657 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 [2022-11-22 02:17:01,657 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 02:17:01,658 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/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) [2022-11-22 02:17:01,662 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/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 [2022-11-22 02:17:01,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:17:01,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-22 02:17:01,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:17:01,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:17:01,852 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:17:01,852 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 02:17:01,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [826612986] [2022-11-22 02:17:01,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [826612986] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:17:01,853 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:17:01,853 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 02:17:01,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005581999] [2022-11-22 02:17:01,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:17:01,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 02:17:01,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 02:17:01,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 02:17:01,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-22 02:17:01,855 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) [2022-11-22 02:17:02,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:17:02,068 INFO L93 Difference]: Finished difference Result 231 states and 304 transitions. [2022-11-22 02:17:02,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 02:17:02,069 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 [2022-11-22 02:17:02,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:17:02,071 INFO L225 Difference]: With dead ends: 231 [2022-11-22 02:17:02,071 INFO L226 Difference]: Without dead ends: 231 [2022-11-22 02:17:02,071 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 [2022-11-22 02:17:02,072 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 123 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 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, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 02:17:02,072 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 227 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 02:17:02,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2022-11-22 02:17:02,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 201. [2022-11-22 02:17:02,091 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) [2022-11-22 02:17:02,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 302 transitions. [2022-11-22 02:17:02,094 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 302 transitions. Word has length 10 [2022-11-22 02:17:02,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:17:02,095 INFO L495 AbstractCegarLoop]: Abstraction has 201 states and 302 transitions. [2022-11-22 02:17:02,095 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) [2022-11-22 02:17:02,095 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 302 transitions. [2022-11-22 02:17:02,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-22 02:17:02,096 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:17:02,096 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:17:02,115 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/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)] Forceful destruction successful, exit code 0 [2022-11-22 02:17:02,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/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 [2022-11-22 02:17:02,320 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)] === [2022-11-22 02:17:02,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:17:02,320 INFO L85 PathProgramCache]: Analyzing trace with hash 12795785, now seen corresponding path program 1 times [2022-11-22 02:17:02,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 02:17:02,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1629552829] [2022-11-22 02:17:02,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:17:02,321 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 [2022-11-22 02:17:02,321 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 02:17:02,322 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/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) [2022-11-22 02:17:02,323 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/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 [2022-11-22 02:17:02,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:17:02,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-22 02:17:02,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:17:02,578 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:17:02,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:17:02,967 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:17:02,968 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 02:17:02,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1629552829] [2022-11-22 02:17:02,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1629552829] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:17:02,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2119014698] [2022-11-22 02:17:02,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:17:02,968 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 02:17:02,968 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 02:17:02,975 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 02:17:02,980 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2022-11-22 02:17:03,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:17:03,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-22 02:17:03,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:17:03,278 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:17:03,278 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:17:03,477 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:17:03,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2119014698] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:17:03,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485125548] [2022-11-22 02:17:03,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:17:03,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:17:03,478 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:17:03,486 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:17:03,507 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-22 02:17:03,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:17:03,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-22 02:17:03,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:17:03,733 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:17:03,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:17:03,925 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:17:03,926 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485125548] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:17:03,926 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-22 02:17:03,926 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3, 3, 3, 3] total 6 [2022-11-22 02:17:03,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884283686] [2022-11-22 02:17:03,926 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-22 02:17:03,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-22 02:17:03,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 02:17:03,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-22 02:17:03,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-11-22 02:17:03,927 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) [2022-11-22 02:17:04,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:17:04,537 INFO L93 Difference]: Finished difference Result 367 states and 495 transitions. [2022-11-22 02:17:04,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-22 02:17:04,538 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 [2022-11-22 02:17:04,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:17:04,540 INFO L225 Difference]: With dead ends: 367 [2022-11-22 02:17:04,540 INFO L226 Difference]: Without dead ends: 367 [2022-11-22 02:17:04,541 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-11-22 02:17:04,541 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 261 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-22 02:17:04,541 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [261 Valid, 312 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-22 02:17:04,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2022-11-22 02:17:04,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 239. [2022-11-22 02:17:04,557 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) [2022-11-22 02:17:04,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 363 transitions. [2022-11-22 02:17:04,570 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 363 transitions. Word has length 14 [2022-11-22 02:17:04,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:17:04,571 INFO L495 AbstractCegarLoop]: Abstraction has 239 states and 363 transitions. [2022-11-22 02:17:04,571 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) [2022-11-22 02:17:04,572 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 363 transitions. [2022-11-22 02:17:04,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-22 02:17:04,573 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:17:04,573 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:17:04,584 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2022-11-22 02:17:04,782 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/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 [2022-11-22 02:17:04,981 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-22 02:17:05,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:17:05,176 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)] === [2022-11-22 02:17:05,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:17:05,177 INFO L85 PathProgramCache]: Analyzing trace with hash 396669285, now seen corresponding path program 1 times [2022-11-22 02:17:05,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 02:17:05,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1193864558] [2022-11-22 02:17:05,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:17:05,177 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 [2022-11-22 02:17:05,178 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 02:17:05,179 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/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) [2022-11-22 02:17:05,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/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 [2022-11-22 02:17:05,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:17:05,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-22 02:17:05,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:17:05,488 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 [2022-11-22 02:17:05,503 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:17:05,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:17:05,676 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:17:05,677 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 02:17:05,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1193864558] [2022-11-22 02:17:05,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1193864558] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:17:05,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1477834344] [2022-11-22 02:17:05,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:17:05,677 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 02:17:05,677 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 02:17:05,679 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 02:17:05,699 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2022-11-22 02:17:05,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:17:05,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-22 02:17:05,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:17:06,133 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 [2022-11-22 02:17:06,159 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:17:06,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:17:06,248 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:17:06,249 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1477834344] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:17:06,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583393472] [2022-11-22 02:17:06,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:17:06,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:17:06,249 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:17:06,251 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:17:06,272 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-22 02:17:06,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:17:06,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-22 02:17:06,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:17:06,720 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 [2022-11-22 02:17:06,726 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:17:06,726 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:17:07,139 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:17:07,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1583393472] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:17:07,140 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-22 02:17:07,140 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 18 [2022-11-22 02:17:07,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204520251] [2022-11-22 02:17:07,140 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-22 02:17:07,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-22 02:17:07,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 02:17:07,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-22 02:17:07,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2022-11-22 02:17:07,142 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) [2022-11-22 02:17:09,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:17:09,522 INFO L93 Difference]: Finished difference Result 601 states and 793 transitions. [2022-11-22 02:17:09,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-22 02:17:09,523 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 [2022-11-22 02:17:09,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:17:09,525 INFO L225 Difference]: With dead ends: 601 [2022-11-22 02:17:09,526 INFO L226 Difference]: Without dead ends: 601 [2022-11-22 02:17:09,526 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=351, Invalid=1131, Unknown=0, NotChecked=0, Total=1482 [2022-11-22 02:17:09,527 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 1349 mSDsluCounter, 418 mSDsCounter, 0 mSdLazyCounter, 512 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1349 SdHoareTripleChecker+Valid, 506 SdHoareTripleChecker+Invalid, 649 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-22 02:17:09,527 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1349 Valid, 506 Invalid, 649 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 512 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-22 02:17:09,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 601 states. [2022-11-22 02:17:09,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 601 to 307. [2022-11-22 02:17:09,541 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) [2022-11-22 02:17:09,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 475 transitions. [2022-11-22 02:17:09,544 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 475 transitions. Word has length 15 [2022-11-22 02:17:09,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:17:09,544 INFO L495 AbstractCegarLoop]: Abstraction has 307 states and 475 transitions. [2022-11-22 02:17:09,545 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) [2022-11-22 02:17:09,545 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 475 transitions. [2022-11-22 02:17:09,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-22 02:17:09,545 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:17:09,546 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:17:09,553 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (12)] Forceful destruction successful, exit code 0 [2022-11-22 02:17:09,764 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/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 [2022-11-22 02:17:09,952 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-11-22 02:17:10,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/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_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:17:10,149 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)] === [2022-11-22 02:17:10,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:17:10,149 INFO L85 PathProgramCache]: Analyzing trace with hash -588154008, now seen corresponding path program 1 times [2022-11-22 02:17:10,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 02:17:10,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1089133485] [2022-11-22 02:17:10,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:17:10,150 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 [2022-11-22 02:17:10,150 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 02:17:10,150 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/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) [2022-11-22 02:17:10,152 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/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 [2022-11-22 02:17:10,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:17:10,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-22 02:17:10,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:17:10,525 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 [2022-11-22 02:17:10,541 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 [2022-11-22 02:17:10,566 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:17:10,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:17:10,781 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:17:10,781 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 02:17:10,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1089133485] [2022-11-22 02:17:10,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1089133485] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:17:10,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2010625493] [2022-11-22 02:17:10,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:17:10,782 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 02:17:10,782 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 02:17:10,783 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 02:17:10,787 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2022-11-22 02:17:10,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:17:10,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-22 02:17:10,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:17:11,169 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 [2022-11-22 02:17:11,176 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-22 02:17:11,185 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:17:11,186 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:17:11,284 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:17:11,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2010625493] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:17:11,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55838365] [2022-11-22 02:17:11,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:17:11,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:17:11,285 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:17:11,289 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:17:11,311 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-22 02:17:11,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:17:11,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-22 02:17:11,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:17:11,800 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 [2022-11-22 02:17:11,807 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 [2022-11-22 02:17:11,856 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:17:11,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:17:12,306 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:17:12,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55838365] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:17:12,306 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-22 02:17:12,306 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 15 [2022-11-22 02:17:12,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242214888] [2022-11-22 02:17:12,307 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-22 02:17:12,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-22 02:17:12,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 02:17:12,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-22 02:17:12,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2022-11-22 02:17:12,308 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) [2022-11-22 02:17:15,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:17:15,069 INFO L93 Difference]: Finished difference Result 830 states and 1133 transitions. [2022-11-22 02:17:15,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-22 02:17:15,070 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 [2022-11-22 02:17:15,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:17:15,073 INFO L225 Difference]: With dead ends: 830 [2022-11-22 02:17:15,073 INFO L226 Difference]: Without dead ends: 830 [2022-11-22 02:17:15,074 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=242, Invalid=750, Unknown=0, NotChecked=0, Total=992 [2022-11-22 02:17:15,075 INFO L413 NwaCegarLoop]: 105 mSDtfsCounter, 1151 mSDsluCounter, 523 mSDsCounter, 0 mSdLazyCounter, 437 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1151 SdHoareTripleChecker+Valid, 628 SdHoareTripleChecker+Invalid, 510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-22 02:17:15,075 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1151 Valid, 628 Invalid, 510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 437 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-22 02:17:15,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 830 states. [2022-11-22 02:17:15,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 830 to 422. [2022-11-22 02:17:15,093 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) [2022-11-22 02:17:15,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 675 transitions. [2022-11-22 02:17:15,097 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 675 transitions. Word has length 16 [2022-11-22 02:17:15,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:17:15,097 INFO L495 AbstractCegarLoop]: Abstraction has 422 states and 675 transitions. [2022-11-22 02:17:15,097 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) [2022-11-22 02:17:15,098 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 675 transitions. [2022-11-22 02:17:15,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-22 02:17:15,098 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:17:15,098 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:17:15,109 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-22 02:17:15,311 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2022-11-22 02:17:15,517 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/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)] Forceful destruction successful, exit code 0 [2022-11-22 02:17:15,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/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 [2022-11-22 02:17:15,710 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)] === [2022-11-22 02:17:15,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:17:15,710 INFO L85 PathProgramCache]: Analyzing trace with hash -1776199670, now seen corresponding path program 1 times [2022-11-22 02:17:15,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 02:17:15,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1165410320] [2022-11-22 02:17:15,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:17:15,711 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 [2022-11-22 02:17:15,711 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 02:17:15,712 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/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) [2022-11-22 02:17:15,714 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/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 [2022-11-22 02:17:15,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:17:15,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-22 02:17:15,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:17:15,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:17:15,859 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:17:15,859 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 02:17:15,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1165410320] [2022-11-22 02:17:15,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1165410320] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:17:15,860 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:17:15,860 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-22 02:17:15,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536634955] [2022-11-22 02:17:15,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:17:15,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:17:15,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 02:17:15,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:17:15,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:17:15,862 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) [2022-11-22 02:17:15,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:17:15,894 INFO L93 Difference]: Finished difference Result 420 states and 622 transitions. [2022-11-22 02:17:15,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:17:15,895 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 [2022-11-22 02:17:15,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:17:15,897 INFO L225 Difference]: With dead ends: 420 [2022-11-22 02:17:15,897 INFO L226 Difference]: Without dead ends: 420 [2022-11-22 02:17:15,897 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 [2022-11-22 02:17:15,898 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 [2022-11-22 02:17:15,899 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] [2022-11-22 02:17:15,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2022-11-22 02:17:15,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 397. [2022-11-22 02:17:15,911 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) [2022-11-22 02:17:15,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 603 transitions. [2022-11-22 02:17:15,914 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 603 transitions. Word has length 18 [2022-11-22 02:17:15,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:17:15,915 INFO L495 AbstractCegarLoop]: Abstraction has 397 states and 603 transitions. [2022-11-22 02:17:15,915 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) [2022-11-22 02:17:15,915 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 603 transitions. [2022-11-22 02:17:15,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-22 02:17:15,916 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:17:15,916 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2022-11-22 02:17:15,935 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/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 [2022-11-22 02:17:16,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/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 [2022-11-22 02:17:16,128 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)] === [2022-11-22 02:17:16,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:17:16,128 INFO L85 PathProgramCache]: Analyzing trace with hash 323759248, now seen corresponding path program 2 times [2022-11-22 02:17:16,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 02:17:16,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [310571524] [2022-11-22 02:17:16,128 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-22 02:17:16,129 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 [2022-11-22 02:17:16,129 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 02:17:16,135 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/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) [2022-11-22 02:17:16,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/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 [2022-11-22 02:17:16,205 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-22 02:17:16,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:17:16,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-22 02:17:16,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:17:16,475 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:17:16,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:17:17,210 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:17:17,210 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 02:17:17,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [310571524] [2022-11-22 02:17:17,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [310571524] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:17:17,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [250819586] [2022-11-22 02:17:17,210 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-22 02:17:17,211 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 02:17:17,211 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 02:17:17,212 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 02:17:17,214 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2022-11-22 02:17:17,359 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-22 02:17:17,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:17:17,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-22 02:17:17,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:17:17,435 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:17:17,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:17:17,580 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:17:17,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [250819586] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:17:17,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377434969] [2022-11-22 02:17:17,580 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-22 02:17:17,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:17:17,581 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:17:17,582 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:17:17,593 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-22 02:17:17,664 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-22 02:17:17,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:17:17,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-22 02:17:17,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:17:17,700 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:17:17,701 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:17:17,768 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:17:17,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377434969] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:17:17,769 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-22 02:17:17,769 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 16 [2022-11-22 02:17:17,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400592563] [2022-11-22 02:17:17,773 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-22 02:17:17,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-22 02:17:17,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 02:17:17,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-22 02:17:17,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2022-11-22 02:17:17,775 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) [2022-11-22 02:17:18,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:17:18,630 INFO L93 Difference]: Finished difference Result 495 states and 681 transitions. [2022-11-22 02:17:18,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-22 02:17:18,631 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 [2022-11-22 02:17:18,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:17:18,633 INFO L225 Difference]: With dead ends: 495 [2022-11-22 02:17:18,634 INFO L226 Difference]: Without dead ends: 495 [2022-11-22 02:17:18,634 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2022-11-22 02:17:18,635 INFO L413 NwaCegarLoop]: 106 mSDtfsCounter, 518 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 518 SdHoareTripleChecker+Valid, 484 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-22 02:17:18,635 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [518 Valid, 484 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-22 02:17:18,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2022-11-22 02:17:18,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 336. [2022-11-22 02:17:18,649 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) [2022-11-22 02:17:18,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 482 transitions. [2022-11-22 02:17:18,651 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 482 transitions. Word has length 22 [2022-11-22 02:17:18,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:17:18,651 INFO L495 AbstractCegarLoop]: Abstraction has 336 states and 482 transitions. [2022-11-22 02:17:18,651 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) [2022-11-22 02:17:18,651 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 482 transitions. [2022-11-22 02:17:18,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-22 02:17:18,652 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:17:18,652 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] [2022-11-22 02:17:18,664 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/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 [2022-11-22 02:17:18,866 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2022-11-22 02:17:19,070 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-22 02:17:19,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:17:19,265 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)] === [2022-11-22 02:17:19,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:17:19,265 INFO L85 PathProgramCache]: Analyzing trace with hash 382694474, now seen corresponding path program 1 times [2022-11-22 02:17:19,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 02:17:19,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1585907235] [2022-11-22 02:17:19,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:17:19,266 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 [2022-11-22 02:17:19,266 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 02:17:19,267 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/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) [2022-11-22 02:17:19,271 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/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 [2022-11-22 02:17:19,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:17:19,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-22 02:17:19,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:17:19,357 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:17:19,357 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:17:19,357 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 02:17:19,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1585907235] [2022-11-22 02:17:19,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1585907235] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:17:19,358 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:17:19,358 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 02:17:19,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114543714] [2022-11-22 02:17:19,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:17:19,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:17:19,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 02:17:19,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:17:19,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:17:19,359 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) [2022-11-22 02:17:19,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:17:19,365 INFO L93 Difference]: Finished difference Result 259 states and 362 transitions. [2022-11-22 02:17:19,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:17:19,366 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 [2022-11-22 02:17:19,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:17:19,367 INFO L225 Difference]: With dead ends: 259 [2022-11-22 02:17:19,367 INFO L226 Difference]: Without dead ends: 259 [2022-11-22 02:17:19,367 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 [2022-11-22 02:17:19,368 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 [2022-11-22 02:17:19,369 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] [2022-11-22 02:17:19,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2022-11-22 02:17:19,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 259. [2022-11-22 02:17:19,375 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) [2022-11-22 02:17:19,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 362 transitions. [2022-11-22 02:17:19,377 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 362 transitions. Word has length 25 [2022-11-22 02:17:19,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:17:19,377 INFO L495 AbstractCegarLoop]: Abstraction has 259 states and 362 transitions. [2022-11-22 02:17:19,377 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) [2022-11-22 02:17:19,378 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 362 transitions. [2022-11-22 02:17:19,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-22 02:17:19,378 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:17:19,378 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] [2022-11-22 02:17:19,399 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/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)] Forceful destruction successful, exit code 0 [2022-11-22 02:17:19,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/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 [2022-11-22 02:17:19,590 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)] === [2022-11-22 02:17:19,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:17:19,591 INFO L85 PathProgramCache]: Analyzing trace with hash -1752183410, now seen corresponding path program 1 times [2022-11-22 02:17:19,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 02:17:19,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [3120220] [2022-11-22 02:17:19,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:17:19,591 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 [2022-11-22 02:17:19,591 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 02:17:19,592 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/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) [2022-11-22 02:17:19,593 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/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 [2022-11-22 02:17:19,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:17:19,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-22 02:17:19,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:17:22,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:17:22,123 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 [2022-11-22 02:17:22,220 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:17:22,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:17:23,035 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 02:17:23,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [3120220] [2022-11-22 02:17:23,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [3120220] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:17:23,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [659775170] [2022-11-22 02:17:23,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:17:23,036 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 02:17:23,036 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 02:17:23,043 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 02:17:23,063 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2022-11-22 02:17:23,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:17:23,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-22 02:17:23,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:17:25,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:17:25,660 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 [2022-11-22 02:17:25,703 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:17:25,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:17:25,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [659775170] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:17:25,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471663485] [2022-11-22 02:17:25,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:17:25,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:17:25,947 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:17:25,952 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:17:25,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-22 02:17:26,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:17:26,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-22 02:17:26,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:17:28,333 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-22 02:17:28,333 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 [2022-11-22 02:17:28,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:17:28,770 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 [2022-11-22 02:17:28,815 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:17:28,815 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:17:28,977 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-11-22 02:17:28,977 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 [2022-11-22 02:17:31,839 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-11-22 02:17:31,840 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 [2022-11-22 02:17:34,044 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:17:34,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471663485] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:17:34,044 INFO L184 FreeRefinementEngine]: Found 0 perfect and 4 imperfect interpolant sequences. [2022-11-22 02:17:34,044 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 4] total 12 [2022-11-22 02:17:34,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661507226] [2022-11-22 02:17:34,044 INFO L85 oduleStraightlineAll]: Using 4 imperfect interpolants to construct interpolant automaton [2022-11-22 02:17:34,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-22 02:17:34,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 02:17:34,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-22 02:17:34,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=152, Unknown=8, NotChecked=0, Total=210 [2022-11-22 02:17:34,046 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) [2022-11-22 02:17:37,072 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 02:17:41,154 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 02:17:43,157 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 02:17:47,270 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 02:17:49,276 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 02:17:51,294 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 02:17:53,309 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 02:17:57,448 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 02:18:05,622 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 02:18:07,633 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 02:18:15,813 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 02:18:17,819 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 02:18:24,067 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 02:18:26,077 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 02:18:26,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:18:26,429 INFO L93 Difference]: Finished difference Result 397 states and 512 transitions. [2022-11-22 02:18:26,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-22 02:18:26,430 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 [2022-11-22 02:18:26,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:18:26,432 INFO L225 Difference]: With dead ends: 397 [2022-11-22 02:18:26,432 INFO L226 Difference]: Without dead ends: 397 [2022-11-22 02:18:26,432 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 97 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 35.0s TimeCoverageRelationStatistics Valid=248, Invalid=546, Unknown=18, NotChecked=0, Total=812 [2022-11-22 02:18:26,433 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 409 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 103 mSolverCounterUnsat, 57 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 28.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 409 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 57 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 29.1s IncrementalHoareTripleChecker+Time [2022-11-22 02:18:26,433 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [409 Valid, 145 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 155 Invalid, 57 Unknown, 0 Unchecked, 29.1s Time] [2022-11-22 02:18:26,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2022-11-22 02:18:26,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 269. [2022-11-22 02:18:26,444 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) [2022-11-22 02:18:26,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 356 transitions. [2022-11-22 02:18:26,446 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 356 transitions. Word has length 27 [2022-11-22 02:18:26,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:18:26,447 INFO L495 AbstractCegarLoop]: Abstraction has 269 states and 356 transitions. [2022-11-22 02:18:26,447 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) [2022-11-22 02:18:26,447 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 356 transitions. [2022-11-22 02:18:26,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-22 02:18:26,451 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:18:26,451 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] [2022-11-22 02:18:26,459 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (23)] Forceful destruction successful, exit code 0 [2022-11-22 02:18:26,661 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/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)] Ended with exit code 0 [2022-11-22 02:18:26,859 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-11-22 02:18:27,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/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_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:18:27,055 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)] === [2022-11-22 02:18:27,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:18:27,055 INFO L85 PathProgramCache]: Analyzing trace with hash 2041807728, now seen corresponding path program 1 times [2022-11-22 02:18:27,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 02:18:27,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [988638685] [2022-11-22 02:18:27,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:18:27,056 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 [2022-11-22 02:18:27,056 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 02:18:27,057 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/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) [2022-11-22 02:18:27,058 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/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 [2022-11-22 02:18:27,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:18:27,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-22 02:18:27,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:18:27,285 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:18:27,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:18:27,540 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:18:27,540 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 02:18:27,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [988638685] [2022-11-22 02:18:27,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [988638685] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:18:27,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [711892568] [2022-11-22 02:18:27,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:18:27,541 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 02:18:27,541 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 02:18:27,543 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 02:18:27,561 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2022-11-22 02:18:27,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:18:27,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-22 02:18:27,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:18:27,854 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:18:27,855 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:18:28,083 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:18:28,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [711892568] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:18:28,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467247693] [2022-11-22 02:18:28,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:18:28,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:18:28,084 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:18:28,086 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:18:28,107 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-11-22 02:18:28,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:18:28,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-22 02:18:28,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:18:28,282 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:18:28,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:18:28,472 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:18:28,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467247693] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:18:28,472 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-22 02:18:28,472 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 7 [2022-11-22 02:18:28,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115109777] [2022-11-22 02:18:28,472 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-22 02:18:28,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-22 02:18:28,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 02:18:28,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-22 02:18:28,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-11-22 02:18:28,474 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) [2022-11-22 02:18:29,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:18:29,096 INFO L93 Difference]: Finished difference Result 386 states and 473 transitions. [2022-11-22 02:18:29,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-22 02:18:29,097 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 [2022-11-22 02:18:29,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:18:29,099 INFO L225 Difference]: With dead ends: 386 [2022-11-22 02:18:29,099 INFO L226 Difference]: Without dead ends: 386 [2022-11-22 02:18:29,099 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2022-11-22 02:18:29,100 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 258 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-22 02:18:29,100 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [258 Valid, 277 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-22 02:18:29,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2022-11-22 02:18:29,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 341. [2022-11-22 02:18:29,109 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) [2022-11-22 02:18:29,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 438 transitions. [2022-11-22 02:18:29,110 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 438 transitions. Word has length 28 [2022-11-22 02:18:29,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:18:29,111 INFO L495 AbstractCegarLoop]: Abstraction has 341 states and 438 transitions. [2022-11-22 02:18:29,111 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) [2022-11-22 02:18:29,111 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 438 transitions. [2022-11-22 02:18:29,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-22 02:18:29,112 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:18:29,112 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] [2022-11-22 02:18:29,124 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-11-22 02:18:29,326 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (26)] Forceful destruction successful, exit code 0 [2022-11-22 02:18:29,529 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/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)] Ended with exit code 0 [2022-11-22 02:18:29,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/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 [2022-11-22 02:18:29,722 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)] === [2022-11-22 02:18:29,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:18:29,722 INFO L85 PathProgramCache]: Analyzing trace with hash -1128469823, now seen corresponding path program 1 times [2022-11-22 02:18:29,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 02:18:29,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1021638565] [2022-11-22 02:18:29,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:18:29,723 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 [2022-11-22 02:18:29,723 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 02:18:29,724 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/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) [2022-11-22 02:18:29,739 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/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 [2022-11-22 02:18:29,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:18:29,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-22 02:18:29,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:18:30,033 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:18:30,034 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:18:30,313 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:18:30,314 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 02:18:30,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1021638565] [2022-11-22 02:18:30,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1021638565] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:18:30,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [305220026] [2022-11-22 02:18:30,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:18:30,314 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 02:18:30,314 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 02:18:30,315 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 02:18:30,317 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2022-11-22 02:18:30,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:18:30,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-22 02:18:30,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:18:30,878 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:18:30,878 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:18:30,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [305220026] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:18:30,878 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-22 02:18:30,878 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4, 4] total 13 [2022-11-22 02:18:30,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275930485] [2022-11-22 02:18:30,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:18:30,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-22 02:18:30,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 02:18:30,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-22 02:18:30,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-11-22 02:18:30,879 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) [2022-11-22 02:18:31,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:18:31,202 INFO L93 Difference]: Finished difference Result 416 states and 519 transitions. [2022-11-22 02:18:31,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-22 02:18:31,203 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 [2022-11-22 02:18:31,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:18:31,204 INFO L225 Difference]: With dead ends: 416 [2022-11-22 02:18:31,205 INFO L226 Difference]: Without dead ends: 416 [2022-11-22 02:18:31,205 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2022-11-22 02:18:31,205 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 118 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 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, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 02:18:31,206 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 194 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 02:18:31,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2022-11-22 02:18:31,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 354. [2022-11-22 02:18:31,219 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) [2022-11-22 02:18:31,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 451 transitions. [2022-11-22 02:18:31,223 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 451 transitions. Word has length 29 [2022-11-22 02:18:31,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:18:31,224 INFO L495 AbstractCegarLoop]: Abstraction has 354 states and 451 transitions. [2022-11-22 02:18:31,224 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) [2022-11-22 02:18:31,224 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 451 transitions. [2022-11-22 02:18:31,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-22 02:18:31,228 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:18:31,228 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] [2022-11-22 02:18:31,247 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/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 [2022-11-22 02:18:31,447 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (29)] Forceful destruction successful, exit code 0 [2022-11-22 02:18:31,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt [2022-11-22 02:18:31,643 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)] === [2022-11-22 02:18:31,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:18:31,643 INFO L85 PathProgramCache]: Analyzing trace with hash -221078483, now seen corresponding path program 1 times [2022-11-22 02:18:31,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 02:18:31,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1423962863] [2022-11-22 02:18:31,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:18:31,644 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 [2022-11-22 02:18:31,644 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 02:18:31,646 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/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) [2022-11-22 02:18:31,674 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/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 [2022-11-22 02:18:31,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:18:31,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-22 02:18:31,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:18:34,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:18:34,406 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 [2022-11-22 02:18:34,564 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 [2022-11-22 02:18:34,568 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-22 02:18:34,617 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:18:34,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:18:37,029 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 02:18:37,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1423962863] [2022-11-22 02:18:37,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1423962863] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:18:37,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1498183188] [2022-11-22 02:18:37,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:18:37,030 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 02:18:37,030 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 02:18:37,031 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 02:18:37,032 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2022-11-22 02:18:37,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:18:37,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-22 02:18:37,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:18:41,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:18:41,893 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 [2022-11-22 02:18:42,004 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 [2022-11-22 02:18:42,010 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 [2022-11-22 02:18:42,031 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:18:42,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:18:44,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1498183188] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:18:44,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066688811] [2022-11-22 02:18:44,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:18:44,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:18:44,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:18:44,295 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:18:44,297 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-11-22 02:18:44,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:18:44,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-22 02:18:44,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:18:46,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:18:46,928 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 [2022-11-22 02:18:47,011 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 [2022-11-22 02:18:47,015 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 [2022-11-22 02:18:47,033 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:18:47,033 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:18:49,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066688811] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:18:49,259 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:18:49,259 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 7 [2022-11-22 02:18:49,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408152460] [2022-11-22 02:18:49,259 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 02:18:49,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-22 02:18:49,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 02:18:49,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-22 02:18:49,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=119, Unknown=5, NotChecked=0, Total=156 [2022-11-22 02:18:49,260 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) [2022-11-22 02:18:54,101 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] [2022-11-22 02:19:18,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:19:18,936 INFO L93 Difference]: Finished difference Result 415 states and 513 transitions. [2022-11-22 02:19:18,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-22 02:19:18,937 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 [2022-11-22 02:19:18,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:19:18,939 INFO L225 Difference]: With dead ends: 415 [2022-11-22 02:19:18,939 INFO L226 Difference]: Without dead ends: 415 [2022-11-22 02:19:18,940 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 90 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 41.8s TimeCoverageRelationStatistics Valid=197, Invalid=486, Unknown=19, NotChecked=0, Total=702 [2022-11-22 02:19:18,940 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 201 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 29 mSolverCounterUnsat, 17 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 17 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-22 02:19:18,940 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [201 Valid, 166 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 173 Invalid, 17 Unknown, 0 Unchecked, 2.6s Time] [2022-11-22 02:19:18,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2022-11-22 02:19:18,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 354. [2022-11-22 02:19:18,948 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) [2022-11-22 02:19:18,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 446 transitions. [2022-11-22 02:19:18,950 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 446 transitions. Word has length 29 [2022-11-22 02:19:18,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:19:18,950 INFO L495 AbstractCegarLoop]: Abstraction has 354 states and 446 transitions. [2022-11-22 02:19:18,950 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) [2022-11-22 02:19:18,951 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 446 transitions. [2022-11-22 02:19:18,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-22 02:19:18,951 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:19:18,951 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:19:18,960 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (31)] Forceful destruction successful, exit code 0 [2022-11-22 02:19:19,162 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/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 [2022-11-22 02:19:19,359 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-11-22 02:19:19,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:19:19,555 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)] === [2022-11-22 02:19:19,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:19:19,556 INFO L85 PathProgramCache]: Analyzing trace with hash 740687428, now seen corresponding path program 1 times [2022-11-22 02:19:19,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 02:19:19,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2017055392] [2022-11-22 02:19:19,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:19:19,556 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 [2022-11-22 02:19:19,556 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 02:19:19,557 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/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) [2022-11-22 02:19:19,558 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/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 [2022-11-22 02:19:19,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:19:19,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-22 02:19:19,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:19:19,884 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-22 02:19:19,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:19:20,238 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-22 02:19:20,238 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 02:19:20,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2017055392] [2022-11-22 02:19:20,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2017055392] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:19:20,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [737833703] [2022-11-22 02:19:20,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:19:20,239 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 02:19:20,239 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 02:19:20,240 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 02:19:20,261 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (34)] Waiting until timeout for monitored process [2022-11-22 02:19:20,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:19:20,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-22 02:19:20,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:19:20,617 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-22 02:19:20,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:19:20,842 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-22 02:19:20,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [737833703] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:19:20,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93310467] [2022-11-22 02:19:20,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:19:20,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:19:20,843 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:19:20,844 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:19:20,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-11-22 02:19:20,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:19:20,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-22 02:19:20,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:19:21,097 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-22 02:19:21,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:19:21,326 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-22 02:19:21,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [93310467] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:19:21,326 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-22 02:19:21,326 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 8 [2022-11-22 02:19:21,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100674832] [2022-11-22 02:19:21,327 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-22 02:19:21,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-22 02:19:21,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 02:19:21,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-22 02:19:21,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-11-22 02:19:21,328 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) [2022-11-22 02:19:22,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:19:22,082 INFO L93 Difference]: Finished difference Result 381 states and 457 transitions. [2022-11-22 02:19:22,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-22 02:19:22,083 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 [2022-11-22 02:19:22,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:19:22,085 INFO L225 Difference]: With dead ends: 381 [2022-11-22 02:19:22,085 INFO L226 Difference]: Without dead ends: 381 [2022-11-22 02:19:22,085 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 [2022-11-22 02:19:22,086 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 364 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 364 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-22 02:19:22,086 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [364 Valid, 283 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-22 02:19:22,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2022-11-22 02:19:22,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 364. [2022-11-22 02:19:22,093 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) [2022-11-22 02:19:22,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 452 transitions. [2022-11-22 02:19:22,094 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 452 transitions. Word has length 31 [2022-11-22 02:19:22,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:19:22,103 INFO L495 AbstractCegarLoop]: Abstraction has 364 states and 452 transitions. [2022-11-22 02:19:22,104 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) [2022-11-22 02:19:22,104 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 452 transitions. [2022-11-22 02:19:22,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-22 02:19:22,106 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:19:22,106 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] [2022-11-22 02:19:22,113 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (34)] Forceful destruction successful, exit code 0 [2022-11-22 02:19:22,326 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/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)] Forceful destruction successful, exit code 0 [2022-11-22 02:19:22,514 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-11-22 02:19:22,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/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_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:19:22,709 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)] === [2022-11-22 02:19:22,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:19:22,709 INFO L85 PathProgramCache]: Analyzing trace with hash 753387604, now seen corresponding path program 1 times [2022-11-22 02:19:22,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 02:19:22,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1341457796] [2022-11-22 02:19:22,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:19:22,710 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 [2022-11-22 02:19:22,710 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 02:19:22,711 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/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) [2022-11-22 02:19:22,712 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/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 [2022-11-22 02:19:22,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:19:22,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-22 02:19:22,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:19:22,909 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:19:22,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:19:23,046 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:19:23,047 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 02:19:23,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1341457796] [2022-11-22 02:19:23,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1341457796] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:19:23,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [212636168] [2022-11-22 02:19:23,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:19:23,047 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 02:19:23,048 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 02:19:23,051 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 02:19:23,078 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (37)] Waiting until timeout for monitored process [2022-11-22 02:19:23,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:19:23,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-22 02:19:23,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:19:23,260 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:19:23,260 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:19:23,388 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:19:23,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [212636168] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:19:23,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591265939] [2022-11-22 02:19:23,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:19:23,389 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:19:23,389 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:19:23,390 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:19:23,392 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-11-22 02:19:23,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:19:23,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-22 02:19:23,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:19:23,567 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:19:23,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:19:23,701 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:19:23,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [591265939] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:19:23,701 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-22 02:19:23,701 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3, 3, 3, 3] total 3 [2022-11-22 02:19:23,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646343262] [2022-11-22 02:19:23,702 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-22 02:19:23,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 02:19:23,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 02:19:23,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 02:19:23,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 02:19:23,703 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) [2022-11-22 02:19:23,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:19:23,760 INFO L93 Difference]: Finished difference Result 365 states and 451 transitions. [2022-11-22 02:19:23,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 02:19:23,760 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 [2022-11-22 02:19:23,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:19:23,762 INFO L225 Difference]: With dead ends: 365 [2022-11-22 02:19:23,762 INFO L226 Difference]: Without dead ends: 365 [2022-11-22 02:19:23,762 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 [2022-11-22 02:19:23,763 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 [2022-11-22 02:19:23,763 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] [2022-11-22 02:19:23,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2022-11-22 02:19:23,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 362. [2022-11-22 02:19:23,770 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) [2022-11-22 02:19:23,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 448 transitions. [2022-11-22 02:19:23,772 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 448 transitions. Word has length 40 [2022-11-22 02:19:23,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:19:23,773 INFO L495 AbstractCegarLoop]: Abstraction has 362 states and 448 transitions. [2022-11-22 02:19:23,773 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) [2022-11-22 02:19:23,773 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 448 transitions. [2022-11-22 02:19:23,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-22 02:19:23,774 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:19:23,774 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] [2022-11-22 02:19:23,780 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-11-22 02:19:23,988 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/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 [2022-11-22 02:19:24,182 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (37)] Forceful destruction successful, exit code 0 [2022-11-22 02:19:24,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt [2022-11-22 02:19:24,381 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)] === [2022-11-22 02:19:24,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:19:24,381 INFO L85 PathProgramCache]: Analyzing trace with hash -1556115366, now seen corresponding path program 1 times [2022-11-22 02:19:24,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 02:19:24,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1031307261] [2022-11-22 02:19:24,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:19:24,382 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 [2022-11-22 02:19:24,382 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 02:19:24,383 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/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) [2022-11-22 02:19:24,384 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/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 [2022-11-22 02:19:24,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:19:24,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-22 02:19:24,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:19:27,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:19:27,035 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 [2022-11-22 02:19:27,461 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:19:27,461 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:19:28,574 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 02:19:28,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1031307261] [2022-11-22 02:19:28,574 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1031307261] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:19:28,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1423115325] [2022-11-22 02:19:28,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:19:28,575 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 02:19:28,575 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 02:19:28,576 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 02:19:28,584 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (40)] Waiting until timeout for monitored process [2022-11-22 02:19:28,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:19:28,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-22 02:19:28,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:19:31,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:19:31,341 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 [2022-11-22 02:19:31,669 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:19:31,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:19:32,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1423115325] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:19:32,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538567868] [2022-11-22 02:19:32,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:19:32,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:19:32,355 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:19:32,356 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:19:32,360 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-11-22 02:19:32,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:19:32,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-22 02:19:32,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:19:34,840 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-22 02:19:34,841 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 [2022-11-22 02:19:35,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:19:35,391 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 [2022-11-22 02:19:35,711 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:19:35,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:19:36,232 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-11-22 02:19:36,233 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 [2022-11-22 02:19:39,207 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-11-22 02:19:39,208 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 [2022-11-22 02:19:41,398 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:19:41,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538567868] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:19:41,399 INFO L184 FreeRefinementEngine]: Found 0 perfect and 4 imperfect interpolant sequences. [2022-11-22 02:19:41,399 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 5] total 14 [2022-11-22 02:19:41,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775553796] [2022-11-22 02:19:41,399 INFO L85 oduleStraightlineAll]: Using 4 imperfect interpolants to construct interpolant automaton [2022-11-22 02:19:41,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-22 02:19:41,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 02:19:41,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-22 02:19:41,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=203, Unknown=10, NotChecked=0, Total=272 [2022-11-22 02:19:41,401 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) [2022-11-22 02:19:46,813 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] [2022-11-22 02:19:54,990 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 02:19:59,302 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 02:20:01,312 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 02:20:07,611 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 02:20:09,622 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] [2022-11-22 02:20:10,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:20:10,094 INFO L93 Difference]: Finished difference Result 435 states and 520 transitions. [2022-11-22 02:20:10,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-22 02:20:10,095 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 [2022-11-22 02:20:10,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:20:10,096 INFO L225 Difference]: With dead ends: 435 [2022-11-22 02:20:10,096 INFO L226 Difference]: Without dead ends: 435 [2022-11-22 02:20:10,097 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 179 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 27.3s TimeCoverageRelationStatistics Valid=241, Invalid=613, Unknown=16, NotChecked=0, Total=870 [2022-11-22 02:20:10,098 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 517 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 85 mSolverCounterUnsat, 50 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 517 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 50 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.3s IncrementalHoareTripleChecker+Time [2022-11-22 02:20:10,098 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [517 Valid, 190 Invalid, 369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 234 Invalid, 50 Unknown, 0 Unchecked, 13.3s Time] [2022-11-22 02:20:10,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2022-11-22 02:20:10,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 360. [2022-11-22 02:20:10,106 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) [2022-11-22 02:20:10,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 438 transitions. [2022-11-22 02:20:10,107 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 438 transitions. Word has length 41 [2022-11-22 02:20:10,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:20:10,107 INFO L495 AbstractCegarLoop]: Abstraction has 360 states and 438 transitions. [2022-11-22 02:20:10,108 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) [2022-11-22 02:20:10,108 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 438 transitions. [2022-11-22 02:20:10,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-22 02:20:10,108 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:20:10,109 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] [2022-11-22 02:20:10,127 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/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)] Forceful destruction successful, exit code 0 [2022-11-22 02:20:10,323 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (40)] Forceful destruction successful, exit code 0 [2022-11-22 02:20:10,526 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2022-11-22 02:20:10,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:20:10,721 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)] === [2022-11-22 02:20:10,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:20:10,722 INFO L85 PathProgramCache]: Analyzing trace with hash 1880179342, now seen corresponding path program 1 times [2022-11-22 02:20:10,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 02:20:10,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1297138506] [2022-11-22 02:20:10,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:20:10,722 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 [2022-11-22 02:20:10,722 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 02:20:10,723 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/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) [2022-11-22 02:20:10,728 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/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 [2022-11-22 02:20:10,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:20:10,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-22 02:20:10,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:20:11,151 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:20:11,151 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:20:11,379 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:20:11,379 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 02:20:11,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1297138506] [2022-11-22 02:20:11,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1297138506] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:20:11,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2086861741] [2022-11-22 02:20:11,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:20:11,380 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 02:20:11,380 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 02:20:11,393 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 02:20:11,396 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (43)] Waiting until timeout for monitored process [2022-11-22 02:20:11,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:20:11,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-22 02:20:11,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:20:11,656 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:20:11,656 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:20:11,825 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:20:11,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2086861741] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:20:11,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048634731] [2022-11-22 02:20:11,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:20:11,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:20:11,825 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:20:11,826 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:20:11,830 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-11-22 02:20:11,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:20:11,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-22 02:20:11,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:20:12,042 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:20:12,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:20:12,232 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:20:12,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1048634731] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:20:12,232 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-22 02:20:12,232 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3, 3, 3, 3] total 6 [2022-11-22 02:20:12,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418926273] [2022-11-22 02:20:12,232 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-22 02:20:12,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-22 02:20:12,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 02:20:12,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-22 02:20:12,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-22 02:20:12,234 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) [2022-11-22 02:20:12,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:20:12,507 INFO L93 Difference]: Finished difference Result 320 states and 377 transitions. [2022-11-22 02:20:12,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-22 02:20:12,508 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 [2022-11-22 02:20:12,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:20:12,510 INFO L225 Difference]: With dead ends: 320 [2022-11-22 02:20:12,510 INFO L226 Difference]: Without dead ends: 320 [2022-11-22 02:20:12,510 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 235 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2022-11-22 02:20:12,511 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 113 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-22 02:20:12,511 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 156 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-22 02:20:12,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2022-11-22 02:20:12,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 298. [2022-11-22 02:20:12,517 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) [2022-11-22 02:20:12,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 358 transitions. [2022-11-22 02:20:12,518 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 358 transitions. Word has length 41 [2022-11-22 02:20:12,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:20:12,519 INFO L495 AbstractCegarLoop]: Abstraction has 298 states and 358 transitions. [2022-11-22 02:20:12,519 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) [2022-11-22 02:20:12,519 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 358 transitions. [2022-11-22 02:20:12,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-22 02:20:12,520 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:20:12,520 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] [2022-11-22 02:20:12,527 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (43)] Forceful destruction successful, exit code 0 [2022-11-22 02:20:12,726 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-11-22 02:20:12,929 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/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 [2022-11-22 02:20:13,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/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 [2022-11-22 02:20:13,122 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)] === [2022-11-22 02:20:13,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:20:13,123 INFO L85 PathProgramCache]: Analyzing trace with hash -1843982442, now seen corresponding path program 1 times [2022-11-22 02:20:13,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 02:20:13,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2088719067] [2022-11-22 02:20:13,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:20:13,124 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 [2022-11-22 02:20:13,124 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 02:20:13,125 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/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) [2022-11-22 02:20:13,130 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/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 [2022-11-22 02:20:13,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:20:13,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-22 02:20:13,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:20:13,250 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 [2022-11-22 02:20:13,411 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-22 02:20:13,411 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 [2022-11-22 02:20:13,455 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:20:13,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:20:13,666 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:20:13,666 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 02:20:13,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2088719067] [2022-11-22 02:20:13,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2088719067] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:20:13,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1594737474] [2022-11-22 02:20:13,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:20:13,666 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 02:20:13,667 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 02:20:13,667 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 02:20:13,669 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (46)] Waiting until timeout for monitored process [2022-11-22 02:20:13,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:20:13,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-22 02:20:13,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:20:13,926 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 [2022-11-22 02:20:14,050 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-22 02:20:14,051 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-22 02:20:14,090 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:20:14,090 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:20:14,287 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:20:14,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1594737474] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:20:14,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747911274] [2022-11-22 02:20:14,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:20:14,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:20:14,288 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:20:14,289 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:20:14,292 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-11-22 02:20:14,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:20:14,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-22 02:20:14,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:20:14,389 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 [2022-11-22 02:20:14,541 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-22 02:20:14,541 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 [2022-11-22 02:20:14,568 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:20:14,569 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:20:14,784 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:20:14,784 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [747911274] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:20:14,784 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-22 02:20:14,785 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3, 3, 3, 3] total 3 [2022-11-22 02:20:14,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824911544] [2022-11-22 02:20:14,785 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-22 02:20:14,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 02:20:14,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 02:20:14,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 02:20:14,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 02:20:14,786 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) [2022-11-22 02:20:15,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:20:15,029 INFO L93 Difference]: Finished difference Result 320 states and 377 transitions. [2022-11-22 02:20:15,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 02:20:15,030 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 [2022-11-22 02:20:15,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:20:15,031 INFO L225 Difference]: With dead ends: 320 [2022-11-22 02:20:15,031 INFO L226 Difference]: Without dead ends: 320 [2022-11-22 02:20:15,031 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 [2022-11-22 02:20:15,032 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 [2022-11-22 02:20:15,032 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] [2022-11-22 02:20:15,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2022-11-22 02:20:15,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 306. [2022-11-22 02:20:15,040 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) [2022-11-22 02:20:15,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 366 transitions. [2022-11-22 02:20:15,041 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 366 transitions. Word has length 42 [2022-11-22 02:20:15,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:20:15,042 INFO L495 AbstractCegarLoop]: Abstraction has 306 states and 366 transitions. [2022-11-22 02:20:15,042 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) [2022-11-22 02:20:15,042 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 366 transitions. [2022-11-22 02:20:15,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-22 02:20:15,043 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:20:15,043 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] [2022-11-22 02:20:15,046 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (46)] Forceful destruction successful, exit code 0 [2022-11-22 02:20:15,253 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/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 [2022-11-22 02:20:15,450 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2022-11-22 02:20:15,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:20:15,646 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)] === [2022-11-22 02:20:15,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:20:15,647 INFO L85 PathProgramCache]: Analyzing trace with hash -639148643, now seen corresponding path program 1 times [2022-11-22 02:20:15,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 02:20:15,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [34502505] [2022-11-22 02:20:15,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:20:15,647 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 [2022-11-22 02:20:15,647 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 02:20:15,648 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/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) [2022-11-22 02:20:15,649 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/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 [2022-11-22 02:20:15,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:20:15,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-22 02:20:15,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:20:15,765 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-22 02:20:15,765 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:20:15,765 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 02:20:15,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [34502505] [2022-11-22 02:20:15,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [34502505] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:20:15,766 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:20:15,766 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 02:20:15,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41014101] [2022-11-22 02:20:15,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:20:15,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:20:15,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 02:20:15,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:20:15,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:20:15,767 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) [2022-11-22 02:20:15,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:20:15,772 INFO L93 Difference]: Finished difference Result 258 states and 294 transitions. [2022-11-22 02:20:15,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:20:15,773 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 [2022-11-22 02:20:15,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:20:15,774 INFO L225 Difference]: With dead ends: 258 [2022-11-22 02:20:15,774 INFO L226 Difference]: Without dead ends: 258 [2022-11-22 02:20:15,774 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 [2022-11-22 02:20:15,780 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 [2022-11-22 02:20:15,781 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] [2022-11-22 02:20:15,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2022-11-22 02:20:15,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 245. [2022-11-22 02:20:15,787 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) [2022-11-22 02:20:15,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 281 transitions. [2022-11-22 02:20:15,788 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 281 transitions. Word has length 47 [2022-11-22 02:20:15,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:20:15,789 INFO L495 AbstractCegarLoop]: Abstraction has 245 states and 281 transitions. [2022-11-22 02:20:15,789 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) [2022-11-22 02:20:15,789 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 281 transitions. [2022-11-22 02:20:15,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-22 02:20:15,790 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:20:15,790 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:20:15,802 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/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)] Ended with exit code 0 [2022-11-22 02:20:15,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/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 [2022-11-22 02:20:15,995 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)] === [2022-11-22 02:20:15,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:20:15,995 INFO L85 PathProgramCache]: Analyzing trace with hash 825866446, now seen corresponding path program 1 times [2022-11-22 02:20:15,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 02:20:15,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [523267319] [2022-11-22 02:20:15,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:20:15,996 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 [2022-11-22 02:20:15,996 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 02:20:15,997 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/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) [2022-11-22 02:20:16,001 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/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 [2022-11-22 02:20:16,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:20:16,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-22 02:20:16,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:20:16,501 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-22 02:20:16,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:20:17,035 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-22 02:20:17,035 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 02:20:17,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [523267319] [2022-11-22 02:20:17,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [523267319] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:20:17,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [703579493] [2022-11-22 02:20:17,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:20:17,036 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 02:20:17,036 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 02:20:17,037 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 02:20:17,038 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (50)] Waiting until timeout for monitored process [2022-11-22 02:20:17,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:20:17,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-22 02:20:17,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:20:17,676 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-22 02:20:17,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:20:18,100 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-22 02:20:18,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [703579493] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:20:18,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254972477] [2022-11-22 02:20:18,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:20:18,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:20:18,101 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:20:18,102 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:20:18,105 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-11-22 02:20:18,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:20:18,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-22 02:20:18,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:20:18,420 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-22 02:20:18,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:20:18,845 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-22 02:20:18,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1254972477] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:20:18,845 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-22 02:20:18,846 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 10 [2022-11-22 02:20:18,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717806075] [2022-11-22 02:20:18,846 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-22 02:20:18,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-22 02:20:18,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 02:20:18,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-22 02:20:18,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-11-22 02:20:18,848 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) [2022-11-22 02:20:19,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:20:19,716 INFO L93 Difference]: Finished difference Result 261 states and 292 transitions. [2022-11-22 02:20:19,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-22 02:20:19,716 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 [2022-11-22 02:20:19,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:20:19,718 INFO L225 Difference]: With dead ends: 261 [2022-11-22 02:20:19,718 INFO L226 Difference]: Without dead ends: 261 [2022-11-22 02:20:19,718 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 290 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=157, Invalid=349, Unknown=0, NotChecked=0, Total=506 [2022-11-22 02:20:19,719 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 253 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-22 02:20:19,719 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [253 Valid, 257 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-22 02:20:19,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2022-11-22 02:20:19,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 245. [2022-11-22 02:20:19,724 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) [2022-11-22 02:20:19,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 279 transitions. [2022-11-22 02:20:19,725 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 279 transitions. Word has length 51 [2022-11-22 02:20:19,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:20:19,726 INFO L495 AbstractCegarLoop]: Abstraction has 245 states and 279 transitions. [2022-11-22 02:20:19,726 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) [2022-11-22 02:20:19,726 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 279 transitions. [2022-11-22 02:20:19,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-22 02:20:19,727 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:20:19,727 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] [2022-11-22 02:20:19,739 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/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)] Ended with exit code 0 [2022-11-22 02:20:19,940 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (50)] Ended with exit code 0 [2022-11-22 02:20:20,144 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2022-11-22 02:20:20,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:20:20,339 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)] === [2022-11-22 02:20:20,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:20:20,340 INFO L85 PathProgramCache]: Analyzing trace with hash -563187969, now seen corresponding path program 1 times [2022-11-22 02:20:20,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 02:20:20,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1005506542] [2022-11-22 02:20:20,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:20:20,340 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 [2022-11-22 02:20:20,340 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 02:20:20,341 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/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) [2022-11-22 02:20:20,342 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/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 [2022-11-22 02:20:20,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:20:20,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-22 02:20:20,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:20:20,757 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-22 02:20:20,758 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 [2022-11-22 02:20:23,551 INFO L321 Elim1Store]: treesize reduction 34, result has 40.4 percent of original size [2022-11-22 02:20:23,551 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 [2022-11-22 02:20:23,598 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 13 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:20:23,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:20:23,786 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-11-22 02:20:23,787 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 [2022-11-22 02:20:27,189 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:20:27,189 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 02:20:27,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1005506542] [2022-11-22 02:20:27,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1005506542] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:20:27,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [565823185] [2022-11-22 02:20:27,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:20:27,190 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 02:20:27,190 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 02:20:27,191 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 02:20:27,192 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (53)] Waiting until timeout for monitored process [2022-11-22 02:20:27,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:20:27,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-22 02:20:27,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:20:27,772 INFO L321 Elim1Store]: treesize reduction 12, result has 42.9 percent of original size [2022-11-22 02:20:27,772 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 [2022-11-22 02:20:28,178 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-22 02:20:28,178 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 [2022-11-22 02:20:28,277 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-22 02:20:28,277 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 [2022-11-22 02:20:28,465 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:20:28,465 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:20:28,599 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-11-22 02:20:28,599 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 [2022-11-22 02:20:35,280 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-11-22 02:20:35,280 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 [2022-11-22 02:20:35,706 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:20:35,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [565823185] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:20:35,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773802178] [2022-11-22 02:20:35,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:20:35,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:20:35,707 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:20:35,709 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:20:35,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-11-22 02:20:35,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:20:35,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-22 02:20:35,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:20:35,888 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-22 02:20:35,888 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 [2022-11-22 02:20:36,258 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-22 02:20:36,259 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 [2022-11-22 02:20:36,342 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-22 02:20:36,342 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 [2022-11-22 02:20:36,407 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 16 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:20:36,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:20:36,542 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-11-22 02:20:36,543 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 [2022-11-22 02:20:45,140 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-11-22 02:20:45,140 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 [2022-11-22 02:20:45,363 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:20:45,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1773802178] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:20:45,363 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-22 02:20:45,364 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 10, 7, 8] total 31 [2022-11-22 02:20:45,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348216989] [2022-11-22 02:20:45,364 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-22 02:20:45,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-22 02:20:45,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 02:20:45,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-22 02:20:45,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=795, Unknown=8, NotChecked=0, Total=992 [2022-11-22 02:20:45,366 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) [2022-11-22 02:20:53,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:20:53,415 INFO L93 Difference]: Finished difference Result 247 states and 281 transitions. [2022-11-22 02:20:53,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-22 02:20:53,416 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 [2022-11-22 02:20:53,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:20:53,418 INFO L225 Difference]: With dead ends: 247 [2022-11-22 02:20:53,418 INFO L226 Difference]: Without dead ends: 247 [2022-11-22 02:20:53,418 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 265 SyntacticMatches, 7 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 27.6s TimeCoverageRelationStatistics Valid=379, Invalid=1095, Unknown=8, NotChecked=0, Total=1482 [2022-11-22 02:20:53,419 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 420 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 420 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-22 02:20:53,419 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [420 Valid, 118 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-22 02:20:53,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2022-11-22 02:20:53,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 244. [2022-11-22 02:20:53,424 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) [2022-11-22 02:20:53,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 278 transitions. [2022-11-22 02:20:53,425 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 278 transitions. Word has length 51 [2022-11-22 02:20:53,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:20:53,425 INFO L495 AbstractCegarLoop]: Abstraction has 244 states and 278 transitions. [2022-11-22 02:20:53,425 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) [2022-11-22 02:20:53,425 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 278 transitions. [2022-11-22 02:20:53,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-22 02:20:53,426 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:20:53,426 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:20:53,433 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-11-22 02:20:53,641 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/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)] Ended with exit code 0 [2022-11-22 02:20:53,835 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (53)] Forceful destruction successful, exit code 0 [2022-11-22 02:20:54,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt [2022-11-22 02:20:54,033 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)] === [2022-11-22 02:20:54,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:20:54,034 INFO L85 PathProgramCache]: Analyzing trace with hash -167943901, now seen corresponding path program 1 times [2022-11-22 02:20:54,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 02:20:54,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2074195007] [2022-11-22 02:20:54,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:20:54,034 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 [2022-11-22 02:20:54,034 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 02:20:54,035 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/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) [2022-11-22 02:20:54,036 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/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 [2022-11-22 02:20:54,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:20:54,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-22 02:20:54,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:20:54,555 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-22 02:20:54,556 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:20:55,121 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-22 02:20:55,121 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 02:20:55,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2074195007] [2022-11-22 02:20:55,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2074195007] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:20:55,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2113938246] [2022-11-22 02:20:55,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:20:55,122 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 02:20:55,122 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 02:20:55,123 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 02:20:55,153 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (56)] Waiting until timeout for monitored process [2022-11-22 02:20:55,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:20:55,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-22 02:20:55,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:20:55,620 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-22 02:20:55,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:20:56,070 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-22 02:20:56,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2113938246] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:20:56,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650176753] [2022-11-22 02:20:56,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:20:56,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:20:56,071 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:20:56,072 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:20:56,074 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-11-22 02:20:56,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:20:56,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-22 02:20:56,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:20:56,428 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-22 02:20:56,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:20:56,864 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-22 02:20:56,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [650176753] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:20:56,865 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-22 02:20:56,865 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 8 [2022-11-22 02:20:56,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918786227] [2022-11-22 02:20:56,865 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-22 02:20:56,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-22 02:20:56,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 02:20:56,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-22 02:20:56,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-11-22 02:20:56,866 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) [2022-11-22 02:20:57,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:20:57,744 INFO L93 Difference]: Finished difference Result 252 states and 283 transitions. [2022-11-22 02:20:57,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-22 02:20:57,744 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 [2022-11-22 02:20:57,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:20:57,746 INFO L225 Difference]: With dead ends: 252 [2022-11-22 02:20:57,746 INFO L226 Difference]: Without dead ends: 252 [2022-11-22 02:20:57,747 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 298 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2022-11-22 02:20:57,747 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 224 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-22 02:20:57,748 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [224 Valid, 274 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-22 02:20:57,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2022-11-22 02:20:57,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 243. [2022-11-22 02:20:57,760 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) [2022-11-22 02:20:57,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 275 transitions. [2022-11-22 02:20:57,761 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 275 transitions. Word has length 52 [2022-11-22 02:20:57,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:20:57,761 INFO L495 AbstractCegarLoop]: Abstraction has 243 states and 275 transitions. [2022-11-22 02:20:57,762 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) [2022-11-22 02:20:57,762 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 275 transitions. [2022-11-22 02:20:57,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-22 02:20:57,763 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:20:57,763 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] [2022-11-22 02:20:57,775 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/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)] Forceful destruction successful, exit code 0 [2022-11-22 02:20:57,969 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2022-11-22 02:20:58,166 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (56)] Ended with exit code 0 [2022-11-22 02:20:58,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/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_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt [2022-11-22 02:20:58,364 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)] === [2022-11-22 02:20:58,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:20:58,364 INFO L85 PathProgramCache]: Analyzing trace with hash -278957874, now seen corresponding path program 1 times [2022-11-22 02:20:58,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 02:20:58,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [508604449] [2022-11-22 02:20:58,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:20:58,365 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 [2022-11-22 02:20:58,365 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 02:20:58,366 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/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) [2022-11-22 02:20:58,369 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/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 [2022-11-22 02:20:58,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:20:58,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-22 02:20:58,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:20:59,066 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-22 02:20:59,066 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 [2022-11-22 02:21:02,362 INFO L321 Elim1Store]: treesize reduction 46, result has 40.3 percent of original size [2022-11-22 02:21:02,362 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 [2022-11-22 02:21:02,524 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 [2022-11-22 02:21:02,604 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 13 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:21:02,604 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:21:03,110 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 02:21:03,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [508604449] [2022-11-22 02:21:03,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [508604449] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:21:03,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [424689984] [2022-11-22 02:21:03,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:21:03,110 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 02:21:03,110 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 02:21:03,111 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 02:21:03,113 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (59)] Waiting until timeout for monitored process [2022-11-22 02:21:03,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:21:03,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-22 02:21:03,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:21:04,170 INFO L321 Elim1Store]: treesize reduction 44, result has 34.3 percent of original size [2022-11-22 02:21:04,171 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 [2022-11-22 02:21:07,221 INFO L321 Elim1Store]: treesize reduction 68, result has 38.2 percent of original size [2022-11-22 02:21:07,222 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 [2022-11-22 02:21:07,495 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 [2022-11-22 02:21:07,589 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 13 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:21:07,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:21:08,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [424689984] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:21:08,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824241392] [2022-11-22 02:21:08,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:21:08,456 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:21:08,456 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:21:08,458 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:21:08,460 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-11-22 02:21:08,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:21:08,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-22 02:21:08,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:21:09,059 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-22 02:21:09,059 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 [2022-11-22 02:21:09,834 INFO L321 Elim1Store]: treesize reduction 34, result has 37.0 percent of original size [2022-11-22 02:21:09,834 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 [2022-11-22 02:21:09,964 INFO L321 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2022-11-22 02:21:09,965 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 [2022-11-22 02:21:10,260 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 [2022-11-22 02:21:10,269 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:21:10,269 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:21:10,498 INFO L321 Elim1Store]: treesize reduction 7, result has 50.0 percent of original size [2022-11-22 02:21:10,498 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 [2022-11-22 02:21:13,410 INFO L321 Elim1Store]: treesize reduction 7, result has 82.1 percent of original size [2022-11-22 02:21:13,410 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 [2022-11-22 02:21:14,637 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 1 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:21:14,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824241392] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:21:14,638 INFO L184 FreeRefinementEngine]: Found 0 perfect and 4 imperfect interpolant sequences. [2022-11-22 02:21:14,638 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 12, 13] total 39 [2022-11-22 02:21:14,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214009071] [2022-11-22 02:21:14,638 INFO L85 oduleStraightlineAll]: Using 4 imperfect interpolants to construct interpolant automaton [2022-11-22 02:21:14,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-11-22 02:21:14,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 02:21:14,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-11-22 02:21:14,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=1499, Unknown=4, NotChecked=0, Total=1722 [2022-11-22 02:21:14,640 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) [2022-11-22 02:21:47,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:21:47,739 INFO L93 Difference]: Finished difference Result 283 states and 316 transitions. [2022-11-22 02:21:47,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-22 02:21:47,740 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 [2022-11-22 02:21:47,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:21:47,741 INFO L225 Difference]: With dead ends: 283 [2022-11-22 02:21:47,741 INFO L226 Difference]: Without dead ends: 283 [2022-11-22 02:21:47,742 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 168 SyntacticMatches, 8 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 937 ImplicationChecksByTransitivity, 41.6s TimeCoverageRelationStatistics Valid=668, Invalid=2633, Unknown=5, NotChecked=0, Total=3306 [2022-11-22 02:21:47,743 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 598 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 457 mSolverCounterSat, 122 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 598 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 457 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-22 02:21:47,743 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [598 Valid, 234 Invalid, 580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 457 Invalid, 1 Unknown, 0 Unchecked, 1.7s Time] [2022-11-22 02:21:47,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2022-11-22 02:21:47,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 243. [2022-11-22 02:21:47,748 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) [2022-11-22 02:21:47,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 274 transitions. [2022-11-22 02:21:47,749 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 274 transitions. Word has length 52 [2022-11-22 02:21:47,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:21:47,750 INFO L495 AbstractCegarLoop]: Abstraction has 243 states and 274 transitions. [2022-11-22 02:21:47,750 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) [2022-11-22 02:21:47,750 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 274 transitions. [2022-11-22 02:21:47,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-22 02:21:47,751 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:21:47,751 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] [2022-11-22 02:21:47,758 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2022-11-22 02:21:47,967 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/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 [2022-11-22 02:21:48,161 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (59)] Ended with exit code 0 [2022-11-22 02:21:48,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt [2022-11-22 02:21:48,359 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)] === [2022-11-22 02:21:48,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:21:48,359 INFO L85 PathProgramCache]: Analyzing trace with hash -1790543120, now seen corresponding path program 1 times [2022-11-22 02:21:48,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 02:21:48,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [999410102] [2022-11-22 02:21:48,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:21:48,360 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 [2022-11-22 02:21:48,360 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 02:21:48,361 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/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) [2022-11-22 02:21:48,362 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/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 [2022-11-22 02:21:48,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:21:48,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-22 02:21:48,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:21:48,775 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-22 02:21:48,775 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 [2022-11-22 02:21:49,118 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 [2022-11-22 02:21:49,254 INFO L321 Elim1Store]: treesize reduction 44, result has 34.3 percent of original size [2022-11-22 02:21:49,254 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 [2022-11-22 02:21:49,392 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 13 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 5 not checked. [2022-11-22 02:21:49,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:21:51,718 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 02:21:51,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [999410102] [2022-11-22 02:21:51,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [999410102] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:21:51,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1867288025] [2022-11-22 02:21:51,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:21:51,719 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 02:21:51,719 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 02:21:51,720 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 02:21:51,721 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (62)] Waiting until timeout for monitored process [2022-11-22 02:21:52,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:21:52,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-22 02:21:52,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:21:52,590 INFO L321 Elim1Store]: treesize reduction 44, result has 34.3 percent of original size [2022-11-22 02:21:52,590 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 [2022-11-22 02:21:54,936 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 [2022-11-22 02:21:55,054 INFO L321 Elim1Store]: treesize reduction 44, result has 37.1 percent of original size [2022-11-22 02:21:55,054 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 [2022-11-22 02:21:55,287 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 13 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 5 not checked. [2022-11-22 02:21:55,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:21:55,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1867288025] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:21:55,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36651409] [2022-11-22 02:21:55,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:21:55,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:21:55,540 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:21:55,541 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:21:55,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-11-22 02:21:55,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:21:55,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-22 02:21:55,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:21:55,905 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-22 02:21:55,905 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 [2022-11-22 02:21:56,234 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 [2022-11-22 02:21:56,360 INFO L321 Elim1Store]: treesize reduction 34, result has 40.4 percent of original size [2022-11-22 02:21:56,360 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 [2022-11-22 02:21:56,420 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 13 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 5 not checked. [2022-11-22 02:21:56,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:22:04,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [36651409] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:22:04,785 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:22:04,785 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-11-22 02:22:04,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954384799] [2022-11-22 02:22:04,786 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 02:22:04,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-22 02:22:04,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 02:22:04,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-22 02:22:04,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=469, Unknown=7, NotChecked=138, Total=702 [2022-11-22 02:22:04,787 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) [2022-11-22 02:22:57,709 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 [2022-11-22 02:22:57,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:22:57,882 INFO L93 Difference]: Finished difference Result 272 states and 298 transitions. [2022-11-22 02:22:57,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-22 02:22:57,883 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 [2022-11-22 02:22:57,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:22:57,885 INFO L225 Difference]: With dead ends: 272 [2022-11-22 02:22:57,885 INFO L226 Difference]: Without dead ends: 272 [2022-11-22 02:22:57,886 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 156 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 4 IntricatePredicates, 1 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 64.8s TimeCoverageRelationStatistics Valid=427, Invalid=1538, Unknown=31, NotChecked=356, Total=2352 [2022-11-22 02:22:57,886 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 383 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 549 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 383 SdHoareTripleChecker+Valid, 414 SdHoareTripleChecker+Invalid, 1011 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 397 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-22 02:22:57,887 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [383 Valid, 414 Invalid, 1011 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 549 Invalid, 0 Unknown, 397 Unchecked, 1.7s Time] [2022-11-22 02:22:57,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2022-11-22 02:22:57,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 254. [2022-11-22 02:22:57,889 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) [2022-11-22 02:22:57,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 283 transitions. [2022-11-22 02:22:57,890 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 283 transitions. Word has length 54 [2022-11-22 02:22:57,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:22:57,891 INFO L495 AbstractCegarLoop]: Abstraction has 254 states and 283 transitions. [2022-11-22 02:22:57,891 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) [2022-11-22 02:22:57,891 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 283 transitions. [2022-11-22 02:22:57,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-11-22 02:22:57,892 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:22:57,892 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] [2022-11-22 02:22:57,905 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/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)] Forceful destruction successful, exit code 0 [2022-11-22 02:22:58,106 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (62)] Ended with exit code 0 [2022-11-22 02:22:58,308 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2022-11-22 02:22:58,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/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_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt,63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:22:58,503 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)] === [2022-11-22 02:22:58,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:22:58,504 INFO L85 PathProgramCache]: Analyzing trace with hash -1294554201, now seen corresponding path program 1 times [2022-11-22 02:22:58,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 02:22:58,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2035699842] [2022-11-22 02:22:58,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:22:58,504 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 [2022-11-22 02:22:58,504 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 02:22:58,505 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/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) [2022-11-22 02:22:58,506 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/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 [2022-11-22 02:22:58,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:22:58,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-22 02:22:58,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:22:59,320 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-22 02:22:59,320 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 [2022-11-22 02:23:04,245 INFO L321 Elim1Store]: treesize reduction 44, result has 34.3 percent of original size [2022-11-22 02:23:04,245 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 [2022-11-22 02:23:04,610 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 [2022-11-22 02:23:04,667 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 13 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:23:04,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:23:05,381 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 02:23:05,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2035699842] [2022-11-22 02:23:05,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2035699842] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:23:05,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1037192922] [2022-11-22 02:23:05,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:23:05,382 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 02:23:05,382 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 02:23:05,383 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 02:23:05,384 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (65)] Waiting until timeout for monitored process [2022-11-22 02:23:05,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:23:05,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-22 02:23:05,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:23:10,541 INFO L321 Elim1Store]: treesize reduction 44, result has 34.3 percent of original size [2022-11-22 02:23:10,541 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 [2022-11-22 02:23:15,754 INFO L321 Elim1Store]: treesize reduction 44, result has 37.1 percent of original size [2022-11-22 02:23:15,754 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 [2022-11-22 02:23:16,287 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 [2022-11-22 02:23:16,390 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 13 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:23:16,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:23:16,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1037192922] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:23:16,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805818123] [2022-11-22 02:23:16,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:23:16,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:23:16,792 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:23:16,793 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:23:16,796 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-11-22 02:23:16,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:23:16,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-22 02:23:16,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:23:19,426 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-22 02:23:19,427 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-22 02:23:24,319 INFO L321 Elim1Store]: treesize reduction 34, result has 40.4 percent of original size [2022-11-22 02:23:24,320 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 [2022-11-22 02:23:24,564 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 [2022-11-22 02:23:24,570 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 13 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:23:24,570 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:23:29,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [805818123] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:23:29,159 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:23:29,159 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2022-11-22 02:23:29,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185098047] [2022-11-22 02:23:29,159 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 02:23:29,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-22 02:23:29,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 02:23:29,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-22 02:23:29,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=738, Unknown=17, NotChecked=0, Total=870 [2022-11-22 02:23:29,161 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) [2022-11-22 02:24:26,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:24:26,266 INFO L93 Difference]: Finished difference Result 330 states and 356 transitions. [2022-11-22 02:24:26,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-22 02:24:26,266 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 [2022-11-22 02:24:26,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:24:26,267 INFO L225 Difference]: With dead ends: 330 [2022-11-22 02:24:26,267 INFO L226 Difference]: Without dead ends: 330 [2022-11-22 02:24:26,268 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 188 SyntacticMatches, 3 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 645 ImplicationChecksByTransitivity, 79.0s TimeCoverageRelationStatistics Valid=560, Invalid=2369, Unknown=41, NotChecked=0, Total=2970 [2022-11-22 02:24:26,268 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 512 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 962 mSolverCounterSat, 72 mSolverCounterUnsat, 34 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 512 SdHoareTripleChecker+Valid, 434 SdHoareTripleChecker+Invalid, 1068 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 962 IncrementalHoareTripleChecker+Invalid, 34 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-11-22 02:24:26,269 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [512 Valid, 434 Invalid, 1068 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 962 Invalid, 34 Unknown, 0 Unchecked, 3.2s Time] [2022-11-22 02:24:26,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2022-11-22 02:24:26,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 253. [2022-11-22 02:24:26,273 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) [2022-11-22 02:24:26,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 282 transitions. [2022-11-22 02:24:26,274 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 282 transitions. Word has length 60 [2022-11-22 02:24:26,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:24:26,274 INFO L495 AbstractCegarLoop]: Abstraction has 253 states and 282 transitions. [2022-11-22 02:24:26,275 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) [2022-11-22 02:24:26,275 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 282 transitions. [2022-11-22 02:24:26,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-11-22 02:24:26,276 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:24:26,276 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] [2022-11-22 02:24:26,295 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2022-11-22 02:24:26,491 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (65)] Forceful destruction successful, exit code 0 [2022-11-22 02:24:26,692 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/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)] Forceful destruction successful, exit code 0 [2022-11-22 02:24:26,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt,64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/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 [2022-11-22 02:24:26,883 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)] === [2022-11-22 02:24:26,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:24:26,884 INFO L85 PathProgramCache]: Analyzing trace with hash -1476474522, now seen corresponding path program 1 times [2022-11-22 02:24:26,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 02:24:26,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2094917381] [2022-11-22 02:24:26,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:24:26,884 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 [2022-11-22 02:24:26,885 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 02:24:26,885 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/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) [2022-11-22 02:24:26,886 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/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 [2022-11-22 02:24:27,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:24:27,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-22 02:24:27,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:24:27,767 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-22 02:24:27,767 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 [2022-11-22 02:24:28,532 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 [2022-11-22 02:24:28,796 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-22 02:24:28,796 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 16 treesize of output 22 [2022-11-22 02:24:30,247 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 [2022-11-22 02:24:30,253 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 [2022-11-22 02:24:30,481 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 02:24:30,481 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 [2022-11-22 02:24:30,648 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 13 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:24:30,648 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:24:31,550 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 [2022-11-22 02:24:31,700 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 02:24:31,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2094917381] [2022-11-22 02:24:31,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2094917381] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:24:31,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [368102052] [2022-11-22 02:24:31,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:24:31,701 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 02:24:31,701 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 02:24:31,702 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 02:24:31,704 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (68)] Waiting until timeout for monitored process [2022-11-22 02:24:32,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:24:32,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-22 02:24:32,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:24:33,514 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-22 02:24:33,514 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 [2022-11-22 02:24:33,570 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-22 02:24:33,570 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 [2022-11-22 02:24:38,734 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-22 02:24:39,131 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-22 02:24:39,131 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 [2022-11-22 02:24:39,159 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 02:24:39,159 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 [2022-11-22 02:24:40,326 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 [2022-11-22 02:24:40,336 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 [2022-11-22 02:24:40,541 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-22 02:24:40,541 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 [2022-11-22 02:24:40,685 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 13 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:24:40,685 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:24:41,062 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 [2022-11-22 02:24:41,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [368102052] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:24:41,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331773838] [2022-11-22 02:24:41,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:24:41,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:24:41,266 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:24:41,268 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:24:41,271 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93f33416-f48f-4531-973c-e408339aea2a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-11-22 02:24:41,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:24:41,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-22 02:24:41,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:24:41,972 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-22 02:24:41,972 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 [2022-11-22 02:24:42,554 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 [2022-11-22 02:24:42,748 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-22 02:24:42,749 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 [2022-11-22 02:24:43,743 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 [2022-11-22 02:24:43,749 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 [2022-11-22 02:24:43,824 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-22 02:24:43,824 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 [2022-11-22 02:24:43,878 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 13 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:24:43,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:24:44,212 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 [2022-11-22 02:24:44,335 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1331773838] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-22 02:24:44,335 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-22 02:24:44,336 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 26 [2022-11-22 02:24:44,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833912486] [2022-11-22 02:24:44,336 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-22 02:24:44,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-22 02:24:44,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 02:24:44,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-22 02:24:44,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1018, Unknown=52, NotChecked=0, Total=1190 [2022-11-22 02:24:44,338 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) [2022-11-22 02:24:55,341 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] [2022-11-22 02:24:57,350 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 02:24:59,434 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 02:25:01,439 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 02:25:03,562 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 02:25:05,565 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 02:25:12,148 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 02:25:14,161 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 02:25:16,222 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 02:25:18,284 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 02:25:20,288 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 02:25:22,304 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 02:25:35,019 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 02:25:37,026 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 02:25:39,064 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 02:25:41,067 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 02:25:43,095 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 02:25:45,097 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 02:25:52,266 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 02:25:54,329 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 02:25:58,732 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 02:26:11,015 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) [2022-11-22 02:26:13,019 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 02:26:25,264 WARN L233 SmtUtils]: Spent 10.17s on a formula simplification. DAG size of input: 56 DAG size of output: 40 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:26:27,270 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 02:26:56,010 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-22 02:27:05,184 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0]