./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety-bftpd/bftpd_3.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-bftpd/bftpd_3.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6826aeecba49275836b6b398765a757158a4e84d2c6569399d77f2320562875e --- 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-8393723 [2022-11-19 06:52:08,439 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 06:52:08,441 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 06:52:08,468 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 06:52:08,472 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 06:52:08,474 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 06:52:08,476 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 06:52:08,481 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 06:52:08,483 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 06:52:08,490 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 06:52:08,491 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 06:52:08,492 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 06:52:08,492 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 06:52:08,493 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 06:52:08,494 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 06:52:08,497 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 06:52:08,499 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 06:52:08,500 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 06:52:08,505 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 06:52:08,507 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 06:52:08,515 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 06:52:08,517 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 06:52:08,518 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 06:52:08,519 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 06:52:08,522 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 06:52:08,531 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 06:52:08,531 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 06:52:08,532 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 06:52:08,533 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 06:52:08,534 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 06:52:08,534 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 06:52:08,535 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 06:52:08,536 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 06:52:08,536 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 06:52:08,537 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 06:52:08,540 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 06:52:08,541 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 06:52:08,541 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 06:52:08,541 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 06:52:08,542 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 06:52:08,547 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 06:52:08,548 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-11-19 06:52:08,570 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 06:52:08,571 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 06:52:08,571 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 06:52:08,571 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 06:52:08,572 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 06:52:08,572 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 06:52:08,572 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 06:52:08,572 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 06:52:08,572 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 06:52:08,573 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 06:52:08,573 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 06:52:08,573 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 06:52:08,573 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 06:52:08,573 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 06:52:08,574 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 06:52:08,574 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 06:52:08,574 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 06:52:08,574 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 06:52:08,575 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-19 06:52:08,575 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-19 06:52:08,575 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 06:52:08,575 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 06:52:08,576 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-19 06:52:08,576 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 06:52:08,576 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 06:52:08,576 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 06:52:08,576 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-19 06:52:08,576 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-19 06:52:08,577 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-19 06:52:08,577 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 06:52:08,577 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-19 06:52:08,577 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 06:52:08,577 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 06:52:08,578 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 06:52:08,578 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 06:52:08,578 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 06:52:08,578 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 06:52:08,578 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 06:52:08,578 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 06:52:08,579 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 06:52:08,579 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 06:52:08,579 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 06:52:08,579 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_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6826aeecba49275836b6b398765a757158a4e84d2c6569399d77f2320562875e [2022-11-19 06:52:08,845 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 06:52:08,884 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 06:52:08,887 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 06:52:08,888 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 06:52:08,889 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 06:52:08,890 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/memsafety-bftpd/bftpd_3.i [2022-11-19 06:52:08,960 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/data/3c6efc4b2/64d815e0d0d44a549252fa78a8f564a6/FLAG06e546502 [2022-11-19 06:52:09,515 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 06:52:09,516 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/sv-benchmarks/c/memsafety-bftpd/bftpd_3.i [2022-11-19 06:52:09,531 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/data/3c6efc4b2/64d815e0d0d44a549252fa78a8f564a6/FLAG06e546502 [2022-11-19 06:52:09,795 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/data/3c6efc4b2/64d815e0d0d44a549252fa78a8f564a6 [2022-11-19 06:52:09,798 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 06:52:09,801 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 06:52:09,804 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 06:52:09,804 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 06:52:09,808 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 06:52:09,809 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 06:52:09" (1/1) ... [2022-11-19 06:52:09,811 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58b05dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:52:09, skipping insertion in model container [2022-11-19 06:52:09,811 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 06:52:09" (1/1) ... [2022-11-19 06:52:09,819 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 06:52:09,862 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 06:52:10,326 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 06:52:10,336 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 06:52:10,404 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 06:52:10,443 INFO L208 MainTranslator]: Completed translation [2022-11-19 06:52:10,443 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:52:10 WrapperNode [2022-11-19 06:52:10,444 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 06:52:10,445 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 06:52:10,445 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 06:52:10,445 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 06:52:10,452 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:52:10" (1/1) ... [2022-11-19 06:52:10,477 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:52:10" (1/1) ... [2022-11-19 06:52:10,516 INFO L138 Inliner]: procedures = 168, calls = 42, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 95 [2022-11-19 06:52:10,517 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 06:52:10,518 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 06:52:10,518 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 06:52:10,518 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 06:52:10,527 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:52:10" (1/1) ... [2022-11-19 06:52:10,528 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:52:10" (1/1) ... [2022-11-19 06:52:10,540 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:52:10" (1/1) ... [2022-11-19 06:52:10,542 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:52:10" (1/1) ... [2022-11-19 06:52:10,553 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:52:10" (1/1) ... [2022-11-19 06:52:10,561 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:52:10" (1/1) ... [2022-11-19 06:52:10,563 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:52:10" (1/1) ... [2022-11-19 06:52:10,568 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:52:10" (1/1) ... [2022-11-19 06:52:10,570 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 06:52:10,575 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 06:52:10,576 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 06:52:10,576 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 06:52:10,577 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:52:10" (1/1) ... [2022-11-19 06:52:10,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 06:52:10,595 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:52:10,612 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 06:52:10,635 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 06:52:10,664 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-19 06:52:10,664 INFO L130 BoogieDeclarations]: Found specification of procedure parse_input [2022-11-19 06:52:10,664 INFO L138 BoogieDeclarations]: Found implementation of procedure parse_input [2022-11-19 06:52:10,665 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-19 06:52:10,665 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 06:52:10,665 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-19 06:52:10,665 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-19 06:52:10,665 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-19 06:52:10,665 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 06:52:10,665 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 06:52:10,666 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 06:52:10,843 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 06:52:10,845 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 06:52:11,108 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 06:52:11,144 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 06:52:11,145 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-19 06:52:11,147 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 06:52:11 BoogieIcfgContainer [2022-11-19 06:52:11,147 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 06:52:11,150 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 06:52:11,150 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 06:52:11,154 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 06:52:11,154 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 06:52:09" (1/3) ... [2022-11-19 06:52:11,155 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ec8dd2e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 06:52:11, skipping insertion in model container [2022-11-19 06:52:11,155 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:52:10" (2/3) ... [2022-11-19 06:52:11,155 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ec8dd2e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 06:52:11, skipping insertion in model container [2022-11-19 06:52:11,156 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 06:52:11" (3/3) ... [2022-11-19 06:52:11,157 INFO L112 eAbstractionObserver]: Analyzing ICFG bftpd_3.i [2022-11-19 06:52:11,175 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 06:52:11,176 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 20 error locations. [2022-11-19 06:52:11,220 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 06:52:11,229 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;@39f9247e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 06:52:11,230 INFO L358 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2022-11-19 06:52:11,234 INFO L276 IsEmpty]: Start isEmpty. Operand has 54 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 49 states have internal predecessors, (54), 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) [2022-11-19 06:52:11,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-19 06:52:11,241 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:52:11,242 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-19 06:52:11,243 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)] === [2022-11-19 06:52:11,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:52:11,249 INFO L85 PathProgramCache]: Analyzing trace with hash 130425256, now seen corresponding path program 1 times [2022-11-19 06:52:11,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:52:11,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655499129] [2022-11-19 06:52:11,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:52:11,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:52:11,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:52:11,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:52:11,607 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:52:11,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655499129] [2022-11-19 06:52:11,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655499129] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:52:11,608 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:52:11,608 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 06:52:11,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205667642] [2022-11-19 06:52:11,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:52:11,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 06:52:11,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:52:11,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 06:52:11,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 06:52:11,645 INFO L87 Difference]: Start difference. First operand has 54 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 49 states have internal predecessors, (54), 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) [2022-11-19 06:52:11,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:52:11,813 INFO L93 Difference]: Finished difference Result 106 states and 123 transitions. [2022-11-19 06:52:11,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 06:52:11,815 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 [2022-11-19 06:52:11,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:52:11,824 INFO L225 Difference]: With dead ends: 106 [2022-11-19 06:52:11,825 INFO L226 Difference]: Without dead ends: 103 [2022-11-19 06:52:11,826 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 [2022-11-19 06:52:11,830 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 122 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 06:52:11,831 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 84 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 06:52:11,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-11-19 06:52:11,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 76. [2022-11-19 06:52:11,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 49 states have (on average 1.7142857142857142) internal successors, (84), 66 states have internal predecessors, (84), 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) [2022-11-19 06:52:11,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 102 transitions. [2022-11-19 06:52:11,882 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 102 transitions. Word has length 5 [2022-11-19 06:52:11,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:52:11,883 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 102 transitions. [2022-11-19 06:52:11,883 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) [2022-11-19 06:52:11,883 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 102 transitions. [2022-11-19 06:52:11,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-19 06:52:11,884 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:52:11,884 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-19 06:52:11,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-19 06:52:11,885 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)] === [2022-11-19 06:52:11,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:52:11,885 INFO L85 PathProgramCache]: Analyzing trace with hash 130425257, now seen corresponding path program 1 times [2022-11-19 06:52:11,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:52:11,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566350785] [2022-11-19 06:52:11,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:52:11,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:52:11,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:52:12,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:52:12,193 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:52:12,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566350785] [2022-11-19 06:52:12,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566350785] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:52:12,199 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:52:12,199 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 06:52:12,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724034819] [2022-11-19 06:52:12,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:52:12,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 06:52:12,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:52:12,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 06:52:12,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 06:52:12,202 INFO L87 Difference]: Start difference. First operand 76 states and 102 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) [2022-11-19 06:52:12,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:52:12,387 INFO L93 Difference]: Finished difference Result 198 states and 266 transitions. [2022-11-19 06:52:12,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 06:52:12,388 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 [2022-11-19 06:52:12,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:52:12,390 INFO L225 Difference]: With dead ends: 198 [2022-11-19 06:52:12,391 INFO L226 Difference]: Without dead ends: 198 [2022-11-19 06:52:12,391 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 [2022-11-19 06:52:12,392 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 135 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 171 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 [2022-11-19 06:52:12,393 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 171 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 06:52:12,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2022-11-19 06:52:12,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 147. [2022-11-19 06:52:12,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 113 states have (on average 1.7079646017699115) internal successors, (193), 130 states have internal predecessors, (193), 10 states have call successors, (10), 6 states have call predecessors, (10), 6 states have return successors, (26), 10 states have call predecessors, (26), 10 states have call successors, (26) [2022-11-19 06:52:12,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 229 transitions. [2022-11-19 06:52:12,414 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 229 transitions. Word has length 5 [2022-11-19 06:52:12,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:52:12,414 INFO L495 AbstractCegarLoop]: Abstraction has 147 states and 229 transitions. [2022-11-19 06:52:12,415 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) [2022-11-19 06:52:12,415 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 229 transitions. [2022-11-19 06:52:12,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-19 06:52:12,415 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:52:12,416 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-19 06:52:12,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-19 06:52:12,416 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)] === [2022-11-19 06:52:12,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:52:12,417 INFO L85 PathProgramCache]: Analyzing trace with hash -251784379, now seen corresponding path program 1 times [2022-11-19 06:52:12,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:52:12,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289254773] [2022-11-19 06:52:12,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:52:12,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:52:12,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:52:12,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:52:12,710 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:52:12,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289254773] [2022-11-19 06:52:12,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289254773] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:52:12,711 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:52:12,711 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 06:52:12,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784452489] [2022-11-19 06:52:12,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:52:12,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 06:52:12,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:52:12,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 06:52:12,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-19 06:52:12,713 INFO L87 Difference]: Start difference. First operand 147 states and 229 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) [2022-11-19 06:52:12,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:52:12,924 INFO L93 Difference]: Finished difference Result 220 states and 317 transitions. [2022-11-19 06:52:12,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 06:52:12,925 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 [2022-11-19 06:52:12,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:52:12,936 INFO L225 Difference]: With dead ends: 220 [2022-11-19 06:52:12,936 INFO L226 Difference]: Without dead ends: 220 [2022-11-19 06:52:12,937 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-19 06:52:12,943 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 85 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 06:52:12,943 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 141 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 06:52:12,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2022-11-19 06:52:12,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 150. [2022-11-19 06:52:12,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 116 states have (on average 1.6896551724137931) internal successors, (196), 133 states have internal predecessors, (196), 10 states have call successors, (10), 6 states have call predecessors, (10), 6 states have return successors, (26), 10 states have call predecessors, (26), 10 states have call successors, (26) [2022-11-19 06:52:12,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 232 transitions. [2022-11-19 06:52:12,975 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 232 transitions. Word has length 6 [2022-11-19 06:52:12,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:52:12,976 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 232 transitions. [2022-11-19 06:52:12,976 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) [2022-11-19 06:52:12,976 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 232 transitions. [2022-11-19 06:52:12,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-19 06:52:12,976 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:52:12,977 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:52:12,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-19 06:52:12,977 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)] === [2022-11-19 06:52:12,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:52:12,978 INFO L85 PathProgramCache]: Analyzing trace with hash 784618888, now seen corresponding path program 1 times [2022-11-19 06:52:12,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:52:12,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513853037] [2022-11-19 06:52:12,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:52:12,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:52:13,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:52:13,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:52:13,306 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:52:13,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513853037] [2022-11-19 06:52:13,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513853037] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:52:13,307 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:52:13,307 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 06:52:13,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033523357] [2022-11-19 06:52:13,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:52:13,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 06:52:13,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:52:13,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 06:52:13,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-19 06:52:13,309 INFO L87 Difference]: Start difference. First operand 150 states and 232 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) [2022-11-19 06:52:13,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:52:13,472 INFO L93 Difference]: Finished difference Result 200 states and 267 transitions. [2022-11-19 06:52:13,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 06:52:13,473 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 [2022-11-19 06:52:13,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:52:13,474 INFO L225 Difference]: With dead ends: 200 [2022-11-19 06:52:13,475 INFO L226 Difference]: Without dead ends: 200 [2022-11-19 06:52:13,475 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-19 06:52:13,476 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 137 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 161 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 [2022-11-19 06:52:13,477 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 161 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 06:52:13,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2022-11-19 06:52:13,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 150. [2022-11-19 06:52:13,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 116 states have (on average 1.6724137931034482) internal successors, (194), 133 states have internal predecessors, (194), 10 states have call successors, (10), 6 states have call predecessors, (10), 6 states have return successors, (26), 10 states have call predecessors, (26), 10 states have call successors, (26) [2022-11-19 06:52:13,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 230 transitions. [2022-11-19 06:52:13,491 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 230 transitions. Word has length 7 [2022-11-19 06:52:13,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:52:13,491 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 230 transitions. [2022-11-19 06:52:13,491 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) [2022-11-19 06:52:13,491 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 230 transitions. [2022-11-19 06:52:13,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-19 06:52:13,492 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:52:13,492 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:52:13,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-19 06:52:13,492 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)] === [2022-11-19 06:52:13,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:52:13,493 INFO L85 PathProgramCache]: Analyzing trace with hash -1446618201, now seen corresponding path program 1 times [2022-11-19 06:52:13,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:52:13,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974004298] [2022-11-19 06:52:13,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:52:13,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:52:13,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:52:13,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:52:13,570 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:52:13,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974004298] [2022-11-19 06:52:13,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974004298] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:52:13,571 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:52:13,571 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 06:52:13,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189012495] [2022-11-19 06:52:13,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:52:13,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 06:52:13,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:52:13,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 06:52:13,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 06:52:13,572 INFO L87 Difference]: Start difference. First operand 150 states and 230 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) [2022-11-19 06:52:13,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:52:13,700 INFO L93 Difference]: Finished difference Result 227 states and 313 transitions. [2022-11-19 06:52:13,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 06:52:13,700 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 [2022-11-19 06:52:13,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:52:13,702 INFO L225 Difference]: With dead ends: 227 [2022-11-19 06:52:13,702 INFO L226 Difference]: Without dead ends: 227 [2022-11-19 06:52:13,702 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 [2022-11-19 06:52:13,703 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 111 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 06:52:13,704 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 144 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 06:52:13,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2022-11-19 06:52:13,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 178. [2022-11-19 06:52:13,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 142 states have (on average 1.6408450704225352) internal successors, (233), 160 states have internal predecessors, (233), 10 states have call successors, (10), 7 states have call predecessors, (10), 8 states have return successors, (26), 10 states have call predecessors, (26), 10 states have call successors, (26) [2022-11-19 06:52:13,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 269 transitions. [2022-11-19 06:52:13,717 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 269 transitions. Word has length 8 [2022-11-19 06:52:13,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:52:13,718 INFO L495 AbstractCegarLoop]: Abstraction has 178 states and 269 transitions. [2022-11-19 06:52:13,718 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) [2022-11-19 06:52:13,718 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 269 transitions. [2022-11-19 06:52:13,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-19 06:52:13,718 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:52:13,719 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:52:13,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-19 06:52:13,719 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)] === [2022-11-19 06:52:13,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:52:13,720 INFO L85 PathProgramCache]: Analyzing trace with hash -1895491222, now seen corresponding path program 1 times [2022-11-19 06:52:13,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:52:13,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577524283] [2022-11-19 06:52:13,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:52:13,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:52:13,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:52:13,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:52:13,840 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:52:13,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577524283] [2022-11-19 06:52:13,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577524283] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:52:13,840 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:52:13,840 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 06:52:13,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532235702] [2022-11-19 06:52:13,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:52:13,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 06:52:13,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:52:13,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 06:52:13,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-19 06:52:13,842 INFO L87 Difference]: Start difference. First operand 178 states and 269 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) [2022-11-19 06:52:13,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:52:13,952 INFO L93 Difference]: Finished difference Result 226 states and 292 transitions. [2022-11-19 06:52:13,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 06:52:13,952 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 [2022-11-19 06:52:13,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:52:13,954 INFO L225 Difference]: With dead ends: 226 [2022-11-19 06:52:13,954 INFO L226 Difference]: Without dead ends: 226 [2022-11-19 06:52:13,954 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 [2022-11-19 06:52:13,955 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 180 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 169 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 [2022-11-19 06:52:13,955 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [180 Valid, 169 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 06:52:13,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2022-11-19 06:52:13,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 192. [2022-11-19 06:52:13,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 155 states have (on average 1.6387096774193548) internal successors, (254), 174 states have internal predecessors, (254), 10 states have call successors, (10), 7 states have call predecessors, (10), 9 states have return successors, (26), 10 states have call predecessors, (26), 10 states have call successors, (26) [2022-11-19 06:52:13,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 290 transitions. [2022-11-19 06:52:13,967 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 290 transitions. Word has length 9 [2022-11-19 06:52:13,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:52:13,967 INFO L495 AbstractCegarLoop]: Abstraction has 192 states and 290 transitions. [2022-11-19 06:52:13,968 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) [2022-11-19 06:52:13,968 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 290 transitions. [2022-11-19 06:52:13,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-19 06:52:13,968 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:52:13,968 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:52:13,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-19 06:52:13,969 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)] === [2022-11-19 06:52:13,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:52:13,969 INFO L85 PathProgramCache]: Analyzing trace with hash -354750800, now seen corresponding path program 1 times [2022-11-19 06:52:13,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:52:13,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965046294] [2022-11-19 06:52:13,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:52:13,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:52:13,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:52:14,156 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:52:14,156 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:52:14,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965046294] [2022-11-19 06:52:14,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965046294] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:52:14,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348313424] [2022-11-19 06:52:14,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:52:14,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:52:14,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:52:14,160 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:52:14,166 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-19 06:52:14,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:52:14,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-19 06:52:14,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:52:14,447 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:52:14,448 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:52:14,556 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:52:14,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1348313424] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:52:14,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [761056065] [2022-11-19 06:52:14,594 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-11-19 06:52:14,594 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:52:14,599 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:52:14,604 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:52:14,607 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:52:14,709 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 157 for LOIs [2022-11-19 06:52:17,497 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:52:20,958 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2251#(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 [2022-11-19 06:52:20,958 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:52:20,958 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 06:52:20,958 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3, 3] total 11 [2022-11-19 06:52:20,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625865950] [2022-11-19 06:52:20,959 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 06:52:20,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-19 06:52:20,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:52:20,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-19 06:52:20,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2022-11-19 06:52:20,961 INFO L87 Difference]: Start difference. First operand 192 states and 290 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) [2022-11-19 06:52:21,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:52:21,252 INFO L93 Difference]: Finished difference Result 260 states and 349 transitions. [2022-11-19 06:52:21,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 06:52:21,253 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 [2022-11-19 06:52:21,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:52:21,254 INFO L225 Difference]: With dead ends: 260 [2022-11-19 06:52:21,254 INFO L226 Difference]: Without dead ends: 260 [2022-11-19 06:52:21,255 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2022-11-19 06:52:21,255 INFO L413 NwaCegarLoop]: 95 mSDtfsCounter, 473 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 473 SdHoareTripleChecker+Valid, 345 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 06:52:21,256 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [473 Valid, 345 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 06:52:21,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2022-11-19 06:52:21,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 197. [2022-11-19 06:52:21,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 159 states have (on average 1.5660377358490567) internal successors, (249), 179 states have internal predecessors, (249), 10 states have call successors, (10), 7 states have call predecessors, (10), 10 states have return successors, (27), 10 states have call predecessors, (27), 10 states have call successors, (27) [2022-11-19 06:52:21,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 286 transitions. [2022-11-19 06:52:21,275 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 286 transitions. Word has length 13 [2022-11-19 06:52:21,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:52:21,276 INFO L495 AbstractCegarLoop]: Abstraction has 197 states and 286 transitions. [2022-11-19 06:52:21,276 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) [2022-11-19 06:52:21,277 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 286 transitions. [2022-11-19 06:52:21,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-19 06:52:21,277 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:52:21,279 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:52:21,290 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-19 06:52:21,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:52:21,485 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)] === [2022-11-19 06:52:21,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:52:21,485 INFO L85 PathProgramCache]: Analyzing trace with hash 1887627038, now seen corresponding path program 1 times [2022-11-19 06:52:21,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:52:21,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185649800] [2022-11-19 06:52:21,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:52:21,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:52:21,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:52:21,733 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:52:21,734 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:52:21,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185649800] [2022-11-19 06:52:21,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185649800] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:52:21,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811788289] [2022-11-19 06:52:21,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:52:21,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:52:21,735 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:52:21,737 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:52:21,757 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-19 06:52:21,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:52:21,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-19 06:52:21,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:52:22,021 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 [2022-11-19 06:52:22,032 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:52:22,032 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:52:22,108 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:52:22,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1811788289] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:52:22,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1230372138] [2022-11-19 06:52:22,111 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-11-19 06:52:22,111 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:52:22,112 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:52:22,112 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:52:22,112 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:52:22,161 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 157 for LOIs [2022-11-19 06:52:24,279 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:52:28,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1230372138] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:52:28,684 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-19 06:52:28,684 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5, 4, 4] total 18 [2022-11-19 06:52:28,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652578926] [2022-11-19 06:52:28,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:52:28,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-19 06:52:28,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:52:28,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-19 06:52:28,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2022-11-19 06:52:28,687 INFO L87 Difference]: Start difference. First operand 197 states and 286 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) [2022-11-19 06:52:29,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:52:29,753 INFO L93 Difference]: Finished difference Result 191 states and 268 transitions. [2022-11-19 06:52:29,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 06:52:29,756 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 [2022-11-19 06:52:29,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:52:29,757 INFO L225 Difference]: With dead ends: 191 [2022-11-19 06:52:29,757 INFO L226 Difference]: Without dead ends: 191 [2022-11-19 06:52:29,758 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 [2022-11-19 06:52:29,758 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 82 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 06:52:29,759 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 93 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-19 06:52:29,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2022-11-19 06:52:29,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2022-11-19 06:52:29,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 153 states have (on average 1.5098039215686274) internal successors, (231), 173 states have internal predecessors, (231), 10 states have call successors, (10), 7 states have call predecessors, (10), 10 states have return successors, (27), 10 states have call predecessors, (27), 10 states have call successors, (27) [2022-11-19 06:52:29,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 268 transitions. [2022-11-19 06:52:29,778 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 268 transitions. Word has length 14 [2022-11-19 06:52:29,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:52:29,778 INFO L495 AbstractCegarLoop]: Abstraction has 191 states and 268 transitions. [2022-11-19 06:52:29,779 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) [2022-11-19 06:52:29,779 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 268 transitions. [2022-11-19 06:52:29,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-19 06:52:29,785 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:52:29,785 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:52:29,799 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-19 06:52:29,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:52:29,992 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)] === [2022-11-19 06:52:29,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:52:29,992 INFO L85 PathProgramCache]: Analyzing trace with hash 1798666464, now seen corresponding path program 1 times [2022-11-19 06:52:29,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:52:29,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511784020] [2022-11-19 06:52:29,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:52:29,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:52:30,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:52:30,287 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:52:30,287 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:52:30,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511784020] [2022-11-19 06:52:30,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511784020] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:52:30,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626991874] [2022-11-19 06:52:30,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:52:30,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:52:30,289 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:52:30,290 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:52:30,315 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-19 06:52:30,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:52:30,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-19 06:52:30,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:52:30,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:52:30,630 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 [2022-11-19 06:52:30,687 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:52:30,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:52:30,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1626991874] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:52:30,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [38633122] [2022-11-19 06:52:30,851 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2022-11-19 06:52:30,852 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:52:30,852 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:52:30,852 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:52:30,852 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:52:30,972 INFO L321 Elim1Store]: treesize reduction 118, result has 27.2 percent of original size [2022-11-19 06:52:30,972 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 [2022-11-19 06:52:30,997 INFO L321 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2022-11-19 06:52:30,998 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 [2022-11-19 06:52:31,394 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 41 for LOIs [2022-11-19 06:52:31,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:52:31,577 INFO L321 Elim1Store]: treesize reduction 110, result has 28.6 percent of original size [2022-11-19 06:52:31,578 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 [2022-11-19 06:52:31,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:52:31,626 INFO L321 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-11-19 06:52:31,627 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 [2022-11-19 06:52:31,678 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:52:35,519 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3294#(and (= 6 |~#commands~0.base|) (<= 0 ~global~0.offset) (= |parse_input_#in~input#1.base| |parse_input_~input#1.base|) (<= 0 |parse_input_#in~input#1.offset|) (= |parse_input_#in~input#1.offset| |parse_input_~input#1.offset|) (<= 0 |~#commands~0.offset|) (= |parse_input_~i~0#1| 0) (<= |parse_input_#in~input#1.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) (<= 3 |parse_input_#in~input#1.base|) (= |old(~global~0.offset)| 0) (<= 0 |#StackHeapBarrier|) (<= |~#commands~0.offset| 0) (= |#NULL.base| 0))' at error location [2022-11-19 06:52:35,519 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:52:35,519 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 06:52:35,520 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 11 [2022-11-19 06:52:35,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248944885] [2022-11-19 06:52:35,520 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 06:52:35,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-19 06:52:35,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:52:35,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-19 06:52:35,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=826, Unknown=2, NotChecked=0, Total=992 [2022-11-19 06:52:35,522 INFO L87 Difference]: Start difference. First operand 191 states and 268 transitions. Second operand has 13 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 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) [2022-11-19 06:52:36,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:52:36,130 INFO L93 Difference]: Finished difference Result 408 states and 568 transitions. [2022-11-19 06:52:36,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-19 06:52:36,131 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 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 21 [2022-11-19 06:52:36,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:52:36,133 INFO L225 Difference]: With dead ends: 408 [2022-11-19 06:52:36,133 INFO L226 Difference]: Without dead ends: 408 [2022-11-19 06:52:36,134 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=287, Invalid=1351, Unknown=2, NotChecked=0, Total=1640 [2022-11-19 06:52:36,135 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 735 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 735 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 06:52:36,135 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [735 Valid, 233 Invalid, 353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 226 Invalid, 0 Unknown, 53 Unchecked, 0.3s Time] [2022-11-19 06:52:36,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2022-11-19 06:52:36,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 341. [2022-11-19 06:52:36,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 290 states have (on average 1.589655172413793) internal successors, (461), 317 states have internal predecessors, (461), 13 states have call successors, (13), 10 states have call predecessors, (13), 20 states have return successors, (47), 13 states have call predecessors, (47), 13 states have call successors, (47) [2022-11-19 06:52:36,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 521 transitions. [2022-11-19 06:52:36,148 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 521 transitions. Word has length 21 [2022-11-19 06:52:36,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:52:36,148 INFO L495 AbstractCegarLoop]: Abstraction has 341 states and 521 transitions. [2022-11-19 06:52:36,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 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) [2022-11-19 06:52:36,149 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 521 transitions. [2022-11-19 06:52:36,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-19 06:52:36,149 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:52:36,150 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:52:36,167 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-19 06:52:36,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-19 06:52:36,355 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-19 06:52:36,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:52:36,356 INFO L85 PathProgramCache]: Analyzing trace with hash 1941617407, now seen corresponding path program 1 times [2022-11-19 06:52:36,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:52:36,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656094831] [2022-11-19 06:52:36,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:52:36,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:52:36,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:52:36,887 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:52:36,888 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:52:36,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656094831] [2022-11-19 06:52:36,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656094831] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:52:36,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193496507] [2022-11-19 06:52:36,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:52:36,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:52:36,888 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:52:36,889 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:52:36,891 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-19 06:52:36,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:52:36,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-19 06:52:36,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:52:37,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:52:37,239 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 [2022-11-19 06:52:37,343 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 [2022-11-19 06:52:37,346 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 [2022-11-19 06:52:37,374 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:52:37,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:52:37,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1193496507] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:52:37,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2024887332] [2022-11-19 06:52:37,552 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2022-11-19 06:52:37,552 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:52:37,552 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:52:37,552 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:52:37,553 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:52:37,686 INFO L321 Elim1Store]: treesize reduction 46, result has 64.6 percent of original size [2022-11-19 06:52:37,687 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 [2022-11-19 06:52:37,956 INFO L321 Elim1Store]: treesize reduction 118, result has 27.2 percent of original size [2022-11-19 06:52:37,957 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 [2022-11-19 06:52:38,276 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 187 for LOIs [2022-11-19 06:52:39,096 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:52:49,862 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4185#(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 [2022-11-19 06:52:49,862 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:52:49,862 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 06:52:49,862 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6] total 17 [2022-11-19 06:52:49,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513741827] [2022-11-19 06:52:49,862 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 06:52:49,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-19 06:52:49,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:52:49,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-19 06:52:49,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=286, Invalid=1044, Unknown=2, NotChecked=0, Total=1332 [2022-11-19 06:52:49,864 INFO L87 Difference]: Start difference. First operand 341 states and 521 transitions. Second operand has 18 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 states have internal predecessors, (40), 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) [2022-11-19 06:52:51,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:52:51,137 INFO L93 Difference]: Finished difference Result 669 states and 903 transitions. [2022-11-19 06:52:51,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-19 06:52:51,138 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 states have internal predecessors, (40), 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 23 [2022-11-19 06:52:51,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:52:51,141 INFO L225 Difference]: With dead ends: 669 [2022-11-19 06:52:51,141 INFO L226 Difference]: Without dead ends: 669 [2022-11-19 06:52:51,142 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 950 ImplicationChecksByTransitivity, 11.9s TimeCoverageRelationStatistics Valid=579, Invalid=2280, Unknown=3, NotChecked=0, Total=2862 [2022-11-19 06:52:51,143 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 941 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 373 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 941 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 95 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 06:52:51,143 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [941 Valid, 307 Invalid, 557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 373 Invalid, 0 Unknown, 95 Unchecked, 0.5s Time] [2022-11-19 06:52:51,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 669 states. [2022-11-19 06:52:51,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 669 to 419. [2022-11-19 06:52:51,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 419 states, 366 states have (on average 1.6065573770491803) internal successors, (588), 393 states have internal predecessors, (588), 14 states have call successors, (14), 11 states have call predecessors, (14), 21 states have return successors, (40), 14 states have call predecessors, (40), 14 states have call successors, (40) [2022-11-19 06:52:51,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 642 transitions. [2022-11-19 06:52:51,159 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 642 transitions. Word has length 23 [2022-11-19 06:52:51,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:52:51,160 INFO L495 AbstractCegarLoop]: Abstraction has 419 states and 642 transitions. [2022-11-19 06:52:51,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 states have internal predecessors, (40), 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) [2022-11-19 06:52:51,160 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 642 transitions. [2022-11-19 06:52:51,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-19 06:52:51,161 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:52:51,161 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:52:51,166 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-11-19 06:52:51,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-19 06:52:51,366 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)] === [2022-11-19 06:52:51,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:52:51,367 INFO L85 PathProgramCache]: Analyzing trace with hash 60597520, now seen corresponding path program 1 times [2022-11-19 06:52:51,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:52:51,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775318096] [2022-11-19 06:52:51,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:52:51,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:52:51,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:52:51,520 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:52:51,521 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:52:51,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775318096] [2022-11-19 06:52:51,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775318096] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:52:51,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773373153] [2022-11-19 06:52:51,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:52:51,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:52:51,522 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:52:51,523 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:52:51,528 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-19 06:52:51,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:52:51,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-19 06:52:51,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:52:51,679 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 06:52:51,679 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 [2022-11-19 06:52:51,716 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:52:51,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:52:51,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773373153] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:52:51,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [100686521] [2022-11-19 06:52:51,781 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2022-11-19 06:52:51,782 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:52:51,782 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:52:51,782 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:52:51,782 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:52:51,881 INFO L321 Elim1Store]: treesize reduction 118, result has 27.2 percent of original size [2022-11-19 06:52:51,881 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 [2022-11-19 06:52:51,901 INFO L321 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2022-11-19 06:52:51,901 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 [2022-11-19 06:52:52,242 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 41 for LOIs [2022-11-19 06:52:52,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:52:52,419 INFO L321 Elim1Store]: treesize reduction 46, result has 62.3 percent of original size [2022-11-19 06:52:52,419 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 [2022-11-19 06:52:52,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:52:52,592 INFO L321 Elim1Store]: treesize reduction 110, result has 28.6 percent of original size [2022-11-19 06:52:52,593 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 [2022-11-19 06:52:52,646 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:52:56,638 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5428#(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) (<= |parse_input_#in~input#1.base| 4) (= |#NULL.offset| 0) (<= 3 |parse_input_#in~input#1.base|) (= |old(~global~0.offset)| 0) (<= 0 |#StackHeapBarrier|) (<= |~#commands~0.offset| 0) (= (select |#valid| |~#commands~0.base|) 1) (= |#NULL.base| 0))' at error location [2022-11-19 06:52:56,638 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:52:56,638 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 06:52:56,639 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2022-11-19 06:52:56,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224452790] [2022-11-19 06:52:56,639 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 06:52:56,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-19 06:52:56,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:52:56,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-19 06:52:56,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=578, Unknown=0, NotChecked=0, Total=702 [2022-11-19 06:52:56,641 INFO L87 Difference]: Start difference. First operand 419 states and 642 transitions. Second operand has 9 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-19 06:52:56,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:52:56,919 INFO L93 Difference]: Finished difference Result 598 states and 869 transitions. [2022-11-19 06:52:56,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-19 06:52:56,920 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2022-11-19 06:52:56,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:52:56,923 INFO L225 Difference]: With dead ends: 598 [2022-11-19 06:52:56,923 INFO L226 Difference]: Without dead ends: 598 [2022-11-19 06:52:56,923 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=192, Invalid=998, Unknown=0, NotChecked=0, Total=1190 [2022-11-19 06:52:56,924 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 247 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 74 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 06:52:56,924 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [247 Valid, 228 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 159 Invalid, 0 Unknown, 74 Unchecked, 0.1s Time] [2022-11-19 06:52:56,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states. [2022-11-19 06:52:56,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 508. [2022-11-19 06:52:56,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 508 states, 450 states have (on average 1.5733333333333333) internal successors, (708), 478 states have internal predecessors, (708), 15 states have call successors, (15), 14 states have call predecessors, (15), 25 states have return successors, (43), 15 states have call predecessors, (43), 15 states have call successors, (43) [2022-11-19 06:52:56,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 508 states to 508 states and 766 transitions. [2022-11-19 06:52:56,939 INFO L78 Accepts]: Start accepts. Automaton has 508 states and 766 transitions. Word has length 24 [2022-11-19 06:52:56,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:52:56,939 INFO L495 AbstractCegarLoop]: Abstraction has 508 states and 766 transitions. [2022-11-19 06:52:56,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-19 06:52:56,939 INFO L276 IsEmpty]: Start isEmpty. Operand 508 states and 766 transitions. [2022-11-19 06:52:56,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-19 06:52:56,940 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:52:56,940 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:52:56,951 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-19 06:52:57,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:52:57,146 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting parse_inputErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-19 06:52:57,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:52:57,146 INFO L85 PathProgramCache]: Analyzing trace with hash 1878523169, now seen corresponding path program 1 times [2022-11-19 06:52:57,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:52:57,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022109126] [2022-11-19 06:52:57,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:52:57,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:52:57,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:52:57,386 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:52:57,386 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:52:57,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022109126] [2022-11-19 06:52:57,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022109126] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:52:57,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756964415] [2022-11-19 06:52:57,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:52:57,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:52:57,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:52:57,391 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:52:57,405 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-19 06:52:57,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:52:57,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-19 06:52:57,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:52:57,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:52:57,595 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 [2022-11-19 06:52:57,674 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:52:57,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:52:57,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [756964415] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:52:57,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [527850852] [2022-11-19 06:52:57,791 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2022-11-19 06:52:57,792 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:52:57,792 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:52:57,792 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:52:57,792 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:52:57,913 INFO L321 Elim1Store]: treesize reduction 46, result has 64.6 percent of original size [2022-11-19 06:52:57,913 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 [2022-11-19 06:52:58,182 INFO L321 Elim1Store]: treesize reduction 118, result has 27.2 percent of original size [2022-11-19 06:52:58,182 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 [2022-11-19 06:52:58,498 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 187 for LOIs [2022-11-19 06:52:59,162 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:53:09,551 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6683#(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 [2022-11-19 06:53:09,551 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:53:09,551 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 06:53:09,551 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2022-11-19 06:53:09,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148168504] [2022-11-19 06:53:09,552 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 06:53:09,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-19 06:53:09,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:53:09,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-19 06:53:09,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=900, Unknown=0, NotChecked=0, Total=1122 [2022-11-19 06:53:09,553 INFO L87 Difference]: Start difference. First operand 508 states and 766 transitions. Second operand has 14 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 states have internal predecessors, (44), 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) [2022-11-19 06:53:10,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:53:10,110 INFO L93 Difference]: Finished difference Result 755 states and 1064 transitions. [2022-11-19 06:53:10,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-19 06:53:10,111 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 states have internal predecessors, (44), 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 25 [2022-11-19 06:53:10,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:53:10,114 INFO L225 Difference]: With dead ends: 755 [2022-11-19 06:53:10,115 INFO L226 Difference]: Without dead ends: 755 [2022-11-19 06:53:10,115 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 589 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=366, Invalid=1526, Unknown=0, NotChecked=0, Total=1892 [2022-11-19 06:53:10,116 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 504 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 291 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 504 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 61 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 06:53:10,116 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [504 Valid, 309 Invalid, 386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 291 Invalid, 0 Unknown, 61 Unchecked, 0.3s Time] [2022-11-19 06:53:10,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 755 states. [2022-11-19 06:53:10,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 755 to 606. [2022-11-19 06:53:10,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 606 states, 544 states have (on average 1.5772058823529411) internal successors, (858), 575 states have internal predecessors, (858), 15 states have call successors, (15), 15 states have call predecessors, (15), 29 states have return successors, (35), 15 states have call predecessors, (35), 15 states have call successors, (35) [2022-11-19 06:53:10,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 606 states to 606 states and 908 transitions. [2022-11-19 06:53:10,135 INFO L78 Accepts]: Start accepts. Automaton has 606 states and 908 transitions. Word has length 25 [2022-11-19 06:53:10,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:53:10,136 INFO L495 AbstractCegarLoop]: Abstraction has 606 states and 908 transitions. [2022-11-19 06:53:10,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 states have internal predecessors, (44), 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) [2022-11-19 06:53:10,136 INFO L276 IsEmpty]: Start isEmpty. Operand 606 states and 908 transitions. [2022-11-19 06:53:10,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-19 06:53:10,137 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:53:10,137 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] [2022-11-19 06:53:10,147 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-11-19 06:53:10,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:53:10,343 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-19 06:53:10,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:53:10,343 INFO L85 PathProgramCache]: Analyzing trace with hash -1950248471, now seen corresponding path program 1 times [2022-11-19 06:53:10,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:53:10,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523579870] [2022-11-19 06:53:10,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:53:10,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:53:10,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:53:10,480 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:53:10,480 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:53:10,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523579870] [2022-11-19 06:53:10,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523579870] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:53:10,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713813686] [2022-11-19 06:53:10,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:53:10,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:53:10,481 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:53:10,482 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:53:10,492 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-19 06:53:10,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:53:10,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-19 06:53:10,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:53:10,677 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:53:10,678 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 06:53:10,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [713813686] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:53:10,678 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 06:53:10,678 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 8 [2022-11-19 06:53:10,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801438395] [2022-11-19 06:53:10,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:53:10,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 06:53:10,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:53:10,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 06:53:10,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-11-19 06:53:10,681 INFO L87 Difference]: Start difference. First operand 606 states and 908 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) [2022-11-19 06:53:10,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:53:10,764 INFO L93 Difference]: Finished difference Result 589 states and 835 transitions. [2022-11-19 06:53:10,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 06:53:10,764 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 [2022-11-19 06:53:10,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:53:10,769 INFO L225 Difference]: With dead ends: 589 [2022-11-19 06:53:10,769 INFO L226 Difference]: Without dead ends: 589 [2022-11-19 06:53:10,770 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-19 06:53:10,771 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 80 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 06:53:10,778 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 126 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 06:53:10,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2022-11-19 06:53:10,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 534. [2022-11-19 06:53:10,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 534 states, 480 states have (on average 1.55) internal successors, (744), 507 states have internal predecessors, (744), 13 states have call successors, (13), 13 states have call predecessors, (13), 23 states have return successors, (27), 13 states have call predecessors, (27), 13 states have call successors, (27) [2022-11-19 06:53:10,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 534 states to 534 states and 784 transitions. [2022-11-19 06:53:10,811 INFO L78 Accepts]: Start accepts. Automaton has 534 states and 784 transitions. Word has length 26 [2022-11-19 06:53:10,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:53:10,812 INFO L495 AbstractCegarLoop]: Abstraction has 534 states and 784 transitions. [2022-11-19 06:53:10,812 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) [2022-11-19 06:53:10,812 INFO L276 IsEmpty]: Start isEmpty. Operand 534 states and 784 transitions. [2022-11-19 06:53:10,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-19 06:53:10,813 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:53:10,813 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] [2022-11-19 06:53:10,823 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-19 06:53:11,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-19 06:53:11,023 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-19 06:53:11,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:53:11,024 INFO L85 PathProgramCache]: Analyzing trace with hash -1950933273, now seen corresponding path program 1 times [2022-11-19 06:53:11,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:53:11,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11410653] [2022-11-19 06:53:11,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:53:11,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:53:11,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:53:11,263 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:53:11,263 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:53:11,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11410653] [2022-11-19 06:53:11,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11410653] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:53:11,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242007983] [2022-11-19 06:53:11,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:53:11,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:53:11,264 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:53:11,267 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:53:11,285 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-19 06:53:11,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:53:11,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-19 06:53:11,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:53:11,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:53:11,551 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 [2022-11-19 06:53:11,689 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:53:11,689 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:53:15,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [242007983] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:53:15,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [434432312] [2022-11-19 06:53:15,918 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2022-11-19 06:53:15,918 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:53:15,918 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:53:15,919 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:53:15,919 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:53:16,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:53:16,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:53:16,120 INFO L321 Elim1Store]: treesize reduction 148, result has 13.5 percent of original size [2022-11-19 06:53:16,120 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 [2022-11-19 06:53:16,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:53:16,190 INFO L321 Elim1Store]: treesize reduction 174, result has 23.0 percent of original size [2022-11-19 06:53:16,190 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 [2022-11-19 06:53:16,627 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 41 for LOIs [2022-11-19 06:53:16,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:53:16,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:53:16,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:53:16,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:53:16,858 INFO L321 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-11-19 06:53:16,859 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 [2022-11-19 06:53:16,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:53:16,917 INFO L321 Elim1Store]: treesize reduction 70, result has 28.6 percent of original size [2022-11-19 06:53:16,917 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 [2022-11-19 06:53:17,016 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:53:19,961 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9432#(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 [2022-11-19 06:53:19,961 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:53:19,961 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 06:53:19,961 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 14 [2022-11-19 06:53:19,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965229843] [2022-11-19 06:53:19,962 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 06:53:19,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-19 06:53:19,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:53:19,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-19 06:53:19,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1112, Unknown=3, NotChecked=0, Total=1260 [2022-11-19 06:53:19,963 INFO L87 Difference]: Start difference. First operand 534 states and 784 transitions. Second operand has 16 states, 13 states have (on average 4.0) internal successors, (52), 13 states have internal predecessors, (52), 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) [2022-11-19 06:53:20,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:53:20,737 INFO L93 Difference]: Finished difference Result 654 states and 903 transitions. [2022-11-19 06:53:20,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-19 06:53:20,737 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 4.0) internal successors, (52), 13 states have internal predecessors, (52), 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 29 [2022-11-19 06:53:20,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:53:20,741 INFO L225 Difference]: With dead ends: 654 [2022-11-19 06:53:20,741 INFO L226 Difference]: Without dead ends: 654 [2022-11-19 06:53:20,742 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 552 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=295, Invalid=1772, Unknown=3, NotChecked=0, Total=2070 [2022-11-19 06:53:20,742 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 416 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 391 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 416 SdHoareTripleChecker+Valid, 369 SdHoareTripleChecker+Invalid, 511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 76 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 06:53:20,743 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [416 Valid, 369 Invalid, 511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 391 Invalid, 0 Unknown, 76 Unchecked, 0.3s Time] [2022-11-19 06:53:20,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 654 states. [2022-11-19 06:53:20,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 654 to 582. [2022-11-19 06:53:20,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 582 states, 525 states have (on average 1.5314285714285714) internal successors, (804), 553 states have internal predecessors, (804), 14 states have call successors, (14), 14 states have call predecessors, (14), 25 states have return successors, (30), 14 states have call predecessors, (30), 14 states have call successors, (30) [2022-11-19 06:53:20,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 582 states to 582 states and 848 transitions. [2022-11-19 06:53:20,761 INFO L78 Accepts]: Start accepts. Automaton has 582 states and 848 transitions. Word has length 29 [2022-11-19 06:53:20,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:53:20,761 INFO L495 AbstractCegarLoop]: Abstraction has 582 states and 848 transitions. [2022-11-19 06:53:20,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 4.0) internal successors, (52), 13 states have internal predecessors, (52), 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) [2022-11-19 06:53:20,761 INFO L276 IsEmpty]: Start isEmpty. Operand 582 states and 848 transitions. [2022-11-19 06:53:20,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-19 06:53:20,762 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:53:20,762 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] [2022-11-19 06:53:20,779 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-19 06:53:20,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:53:20,968 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-19 06:53:20,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:53:20,968 INFO L85 PathProgramCache]: Analyzing trace with hash -349389369, now seen corresponding path program 1 times [2022-11-19 06:53:20,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:53:20,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528836089] [2022-11-19 06:53:20,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:53:20,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:53:20,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:53:21,284 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:53:21,284 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:53:21,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528836089] [2022-11-19 06:53:21,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528836089] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:53:21,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283999018] [2022-11-19 06:53:21,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:53:21,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:53:21,285 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:53:21,286 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:53:21,299 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-19 06:53:21,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:53:21,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-19 06:53:21,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:53:21,527 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 06:53:21,527 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 [2022-11-19 06:53:21,651 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 [2022-11-19 06:53:21,667 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:53:21,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:53:21,773 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [283999018] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:53:21,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [899140214] [2022-11-19 06:53:21,775 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2022-11-19 06:53:21,775 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:53:21,776 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:53:21,776 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:53:21,776 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:53:21,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:53:21,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:53:21,981 INFO L321 Elim1Store]: treesize reduction 165, result has 19.9 percent of original size [2022-11-19 06:53:21,982 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 [2022-11-19 06:53:22,073 INFO L321 Elim1Store]: treesize reduction 205, result has 30.0 percent of original size [2022-11-19 06:53:22,074 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 [2022-11-19 06:53:22,586 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 187 for LOIs [2022-11-19 06:53:23,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:53:23,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:53:23,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:53:23,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:53:23,061 INFO L321 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-11-19 06:53:23,062 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 [2022-11-19 06:53:23,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:53:23,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:53:23,107 INFO L321 Elim1Store]: treesize reduction 52, result has 26.8 percent of original size [2022-11-19 06:53:23,107 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 [2022-11-19 06:53:23,214 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:53:26,052 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10852#(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 [2022-11-19 06:53:26,052 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:53:26,052 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 06:53:26,053 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 13 [2022-11-19 06:53:26,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336761836] [2022-11-19 06:53:26,053 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 06:53:26,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-19 06:53:26,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:53:26,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-19 06:53:26,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=1039, Unknown=0, NotChecked=0, Total=1190 [2022-11-19 06:53:26,055 INFO L87 Difference]: Start difference. First operand 582 states and 848 transitions. Second operand has 15 states, 14 states have (on average 3.857142857142857) internal successors, (54), 14 states have internal predecessors, (54), 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) [2022-11-19 06:53:26,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:53:26,570 INFO L93 Difference]: Finished difference Result 649 states and 915 transitions. [2022-11-19 06:53:26,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-19 06:53:26,571 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.857142857142857) internal successors, (54), 14 states have internal predecessors, (54), 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 30 [2022-11-19 06:53:26,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:53:26,573 INFO L225 Difference]: With dead ends: 649 [2022-11-19 06:53:26,574 INFO L226 Difference]: Without dead ends: 649 [2022-11-19 06:53:26,574 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 45 SyntacticMatches, 4 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 672 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=270, Invalid=1710, Unknown=0, NotChecked=0, Total=1980 [2022-11-19 06:53:26,575 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 241 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 06:53:26,575 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [241 Valid, 329 Invalid, 361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 300 Invalid, 0 Unknown, 40 Unchecked, 0.3s Time] [2022-11-19 06:53:26,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 649 states. [2022-11-19 06:53:26,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 649 to 582. [2022-11-19 06:53:26,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 582 states, 525 states have (on average 1.5238095238095237) internal successors, (800), 553 states have internal predecessors, (800), 14 states have call successors, (14), 14 states have call predecessors, (14), 25 states have return successors, (30), 14 states have call predecessors, (30), 14 states have call successors, (30) [2022-11-19 06:53:26,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 582 states to 582 states and 844 transitions. [2022-11-19 06:53:26,592 INFO L78 Accepts]: Start accepts. Automaton has 582 states and 844 transitions. Word has length 30 [2022-11-19 06:53:26,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:53:26,592 INFO L495 AbstractCegarLoop]: Abstraction has 582 states and 844 transitions. [2022-11-19 06:53:26,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.857142857142857) internal successors, (54), 14 states have internal predecessors, (54), 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) [2022-11-19 06:53:26,593 INFO L276 IsEmpty]: Start isEmpty. Operand 582 states and 844 transitions. [2022-11-19 06:53:26,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-19 06:53:26,594 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:53:26,594 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] [2022-11-19 06:53:26,599 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-19 06:53:26,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:53:26,799 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)] === [2022-11-19 06:53:26,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:53:26,800 INFO L85 PathProgramCache]: Analyzing trace with hash 2053831494, now seen corresponding path program 1 times [2022-11-19 06:53:26,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:53:26,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914115217] [2022-11-19 06:53:26,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:53:26,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:53:26,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:53:27,184 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:53:27,185 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:53:27,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914115217] [2022-11-19 06:53:27,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914115217] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:53:27,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012582404] [2022-11-19 06:53:27,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:53:27,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:53:27,186 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:53:27,186 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:53:27,204 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-19 06:53:27,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:53:27,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-19 06:53:27,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:53:27,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:53:27,565 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 [2022-11-19 06:53:27,776 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 [2022-11-19 06:53:27,780 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 [2022-11-19 06:53:27,811 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:53:27,811 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:53:28,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2012582404] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:53:28,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1486409468] [2022-11-19 06:53:28,089 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2022-11-19 06:53:28,089 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:53:28,089 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:53:28,089 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:53:28,089 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:53:28,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:53:28,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:53:28,319 INFO L321 Elim1Store]: treesize reduction 148, result has 13.5 percent of original size [2022-11-19 06:53:28,320 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 [2022-11-19 06:53:28,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:53:28,405 INFO L321 Elim1Store]: treesize reduction 174, result has 23.0 percent of original size [2022-11-19 06:53:28,405 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 [2022-11-19 06:53:28,833 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 41 for LOIs [2022-11-19 06:53:29,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:53:29,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:53:29,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:53:29,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:53:29,170 INFO L321 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-11-19 06:53:29,171 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 [2022-11-19 06:53:29,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:53:29,232 INFO L321 Elim1Store]: treesize reduction 70, result has 28.6 percent of original size [2022-11-19 06:53:29,232 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 [2022-11-19 06:53:29,372 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:53:33,237 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '12276#(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 [2022-11-19 06:53:33,237 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:53:33,237 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 06:53:33,237 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 15 [2022-11-19 06:53:33,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693997970] [2022-11-19 06:53:33,237 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 06:53:33,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-19 06:53:33,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:53:33,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-19 06:53:33,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=1257, Unknown=0, NotChecked=0, Total=1406 [2022-11-19 06:53:33,239 INFO L87 Difference]: Start difference. First operand 582 states and 844 transitions. Second operand has 17 states, 14 states have (on average 4.0) internal successors, (56), 14 states have internal predecessors, (56), 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) [2022-11-19 06:53:35,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:53:35,005 INFO L93 Difference]: Finished difference Result 738 states and 972 transitions. [2022-11-19 06:53:35,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-19 06:53:35,006 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 14 states have (on average 4.0) internal successors, (56), 14 states have internal predecessors, (56), 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 31 [2022-11-19 06:53:35,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:53:35,009 INFO L225 Difference]: With dead ends: 738 [2022-11-19 06:53:35,009 INFO L226 Difference]: Without dead ends: 738 [2022-11-19 06:53:35,010 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 53 SyntacticMatches, 4 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1261 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=559, Invalid=3601, Unknown=0, NotChecked=0, Total=4160 [2022-11-19 06:53:35,011 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 709 mSDsluCounter, 363 mSDsCounter, 0 mSdLazyCounter, 628 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 709 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 821 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 628 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 120 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-19 06:53:35,011 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [709 Valid, 404 Invalid, 821 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 628 Invalid, 0 Unknown, 120 Unchecked, 0.6s Time] [2022-11-19 06:53:35,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 738 states. [2022-11-19 06:53:35,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 738 to 639. [2022-11-19 06:53:35,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 639 states, 578 states have (on average 1.5017301038062283) internal successors, (868), 608 states have internal predecessors, (868), 15 states have call successors, (15), 15 states have call predecessors, (15), 28 states have return successors, (32), 15 states have call predecessors, (32), 15 states have call successors, (32) [2022-11-19 06:53:35,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 639 states to 639 states and 915 transitions. [2022-11-19 06:53:35,043 INFO L78 Accepts]: Start accepts. Automaton has 639 states and 915 transitions. Word has length 31 [2022-11-19 06:53:35,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:53:35,043 INFO L495 AbstractCegarLoop]: Abstraction has 639 states and 915 transitions. [2022-11-19 06:53:35,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 14 states have (on average 4.0) internal successors, (56), 14 states have internal predecessors, (56), 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) [2022-11-19 06:53:35,043 INFO L276 IsEmpty]: Start isEmpty. Operand 639 states and 915 transitions. [2022-11-19 06:53:35,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-19 06:53:35,044 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:53:35,044 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, 1] [2022-11-19 06:53:35,050 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-19 06:53:35,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-19 06:53:35,250 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-19 06:53:35,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:53:35,251 INFO L85 PathProgramCache]: Analyzing trace with hash -515440830, now seen corresponding path program 1 times [2022-11-19 06:53:35,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:53:35,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550024676] [2022-11-19 06:53:35,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:53:35,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:53:35,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:53:35,412 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-19 06:53:35,412 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:53:35,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550024676] [2022-11-19 06:53:35,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550024676] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:53:35,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323160581] [2022-11-19 06:53:35,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:53:35,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:53:35,413 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:53:35,414 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:53:35,435 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-19 06:53:35,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:53:35,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-19 06:53:35,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:53:35,661 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-19 06:53:35,662 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 [2022-11-19 06:53:35,727 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-19 06:53:35,728 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:53:35,760 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 20 [2022-11-19 06:53:35,918 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 24 treesize of output 20 [2022-11-19 06:53:35,942 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-19 06:53:35,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [323160581] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:53:35,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1048848131] [2022-11-19 06:53:35,949 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2022-11-19 06:53:35,950 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:53:35,950 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:53:35,950 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:53:35,950 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:53:36,267 INFO L321 Elim1Store]: treesize reduction 148, result has 41.5 percent of original size [2022-11-19 06:53:36,267 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 187 treesize of output 258 [2022-11-19 06:53:39,265 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 187 for LOIs [2022-11-19 06:53:39,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:53:39,785 INFO L321 Elim1Store]: treesize reduction 62, result has 36.7 percent of original size [2022-11-19 06:53:39,786 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 8 case distinctions, treesize of input 31 treesize of output 57 [2022-11-19 06:53:39,917 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:53:43,023 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '13944#(and (<= |parse_input_~input#1.offset| 0) (= 6 |~#commands~0.base|) (<= 0 ~global~0.offset) (<= 3 |parse_input_~input#1.base|) (<= |#NULL.offset| 0) (not (= (select |#valid| |~#commands~0.base|) 1)) (<= 0 |parse_input_~input#1.offset|) (<= 0 |parse_input_#in~input#1.offset|) (<= 0 |~#commands~0.offset|) (<= |parse_input_#in~input#1.offset| 0) (<= ~global~0.offset 0) (<= |parse_input_#in~input#1.base| 4) (<= |parse_input_~input#1.base| 4) (< |parse_input_~i~0#1| 2) (<= 3 |parse_input_#in~input#1.base|) (<= 0 |#NULL.offset|) (= |old(~global~0.offset)| 0) (<= 0 |#StackHeapBarrier|) (<= 0 |parse_input_~i~0#1|) (<= |~#commands~0.offset| 0) (= |#NULL.base| 0))' at error location [2022-11-19 06:53:43,023 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:53:43,023 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 06:53:43,023 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 13 [2022-11-19 06:53:43,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106658623] [2022-11-19 06:53:43,023 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 06:53:43,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-19 06:53:43,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:53:43,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-19 06:53:43,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=881, Unknown=0, NotChecked=0, Total=1056 [2022-11-19 06:53:43,025 INFO L87 Difference]: Start difference. First operand 639 states and 915 transitions. Second operand has 15 states, 10 states have (on average 7.6) internal successors, (76), 13 states have internal predecessors, (76), 6 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-19 06:53:43,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:53:43,575 INFO L93 Difference]: Finished difference Result 807 states and 1076 transitions. [2022-11-19 06:53:43,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-19 06:53:43,575 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 10 states have (on average 7.6) internal successors, (76), 13 states have internal predecessors, (76), 6 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 34 [2022-11-19 06:53:43,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:53:43,579 INFO L225 Difference]: With dead ends: 807 [2022-11-19 06:53:43,579 INFO L226 Difference]: Without dead ends: 807 [2022-11-19 06:53:43,579 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 71 SyntacticMatches, 5 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 685 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=276, Invalid=1446, Unknown=0, NotChecked=0, Total=1722 [2022-11-19 06:53:43,581 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 485 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 485 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 6 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 06:53:43,581 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [485 Valid, 248 Invalid, 392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 319 Invalid, 0 Unknown, 6 Unchecked, 0.3s Time] [2022-11-19 06:53:43,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 807 states. [2022-11-19 06:53:43,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 807 to 698. [2022-11-19 06:53:43,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 698 states, 630 states have (on average 1.4841269841269842) internal successors, (935), 661 states have internal predecessors, (935), 18 states have call successors, (18), 18 states have call predecessors, (18), 32 states have return successors, (39), 18 states have call predecessors, (39), 18 states have call successors, (39) [2022-11-19 06:53:43,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 698 states to 698 states and 992 transitions. [2022-11-19 06:53:43,605 INFO L78 Accepts]: Start accepts. Automaton has 698 states and 992 transitions. Word has length 34 [2022-11-19 06:53:43,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:53:43,606 INFO L495 AbstractCegarLoop]: Abstraction has 698 states and 992 transitions. [2022-11-19 06:53:43,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 10 states have (on average 7.6) internal successors, (76), 13 states have internal predecessors, (76), 6 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-19 06:53:43,607 INFO L276 IsEmpty]: Start isEmpty. Operand 698 states and 992 transitions. [2022-11-19 06:53:43,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-19 06:53:43,608 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:53:43,608 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, 1] [2022-11-19 06:53:43,622 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-19 06:53:43,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-19 06:53:43,823 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-19 06:53:43,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:53:43,824 INFO L85 PathProgramCache]: Analyzing trace with hash 1201203435, now seen corresponding path program 1 times [2022-11-19 06:53:43,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:53:43,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491050844] [2022-11-19 06:53:43,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:53:43,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:53:43,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:53:44,421 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:53:44,422 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:53:44,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491050844] [2022-11-19 06:53:44,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491050844] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:53:44,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706989937] [2022-11-19 06:53:44,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:53:44,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:53:44,423 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:53:44,427 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:53:44,455 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-19 06:53:44,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:53:44,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-19 06:53:44,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:53:44,828 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 [2022-11-19 06:53:44,899 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 [2022-11-19 06:53:44,916 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-19 06:53:44,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:53:45,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [706989937] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:53:45,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [192838813] [2022-11-19 06:53:45,036 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2022-11-19 06:53:45,037 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:53:45,037 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:53:45,037 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:53:45,037 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:53:45,365 INFO L321 Elim1Store]: treesize reduction 148, result has 41.5 percent of original size [2022-11-19 06:53:45,366 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 187 treesize of output 258 [2022-11-19 06:53:46,861 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 187 for LOIs [2022-11-19 06:53:47,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:53:47,414 INFO L321 Elim1Store]: treesize reduction 62, result has 36.7 percent of original size [2022-11-19 06:53:47,414 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 8 case distinctions, treesize of input 31 treesize of output 57 [2022-11-19 06:53:47,536 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:53:51,064 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '15627#(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 [2022-11-19 06:53:51,064 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:53:51,064 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 06:53:51,064 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 15 [2022-11-19 06:53:51,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960763704] [2022-11-19 06:53:51,064 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 06:53:51,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-19 06:53:51,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:53:51,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-19 06:53:51,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1259, Unknown=0, NotChecked=0, Total=1406 [2022-11-19 06:53:51,066 INFO L87 Difference]: Start difference. First operand 698 states and 992 transitions. Second operand has 16 states, 14 states have (on average 4.142857142857143) internal successors, (58), 13 states have internal predecessors, (58), 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) [2022-11-19 06:53:52,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:53:52,441 INFO L93 Difference]: Finished difference Result 444 states and 556 transitions. [2022-11-19 06:53:52,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-19 06:53:52,441 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 4.142857142857143) internal successors, (58), 13 states have internal predecessors, (58), 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 [2022-11-19 06:53:52,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:53:52,443 INFO L225 Difference]: With dead ends: 444 [2022-11-19 06:53:52,444 INFO L226 Difference]: Without dead ends: 444 [2022-11-19 06:53:52,445 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 43 SyntacticMatches, 5 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1038 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=465, Invalid=3195, Unknown=0, NotChecked=0, Total=3660 [2022-11-19 06:53:52,445 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 631 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 560 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 631 SdHoareTripleChecker+Valid, 377 SdHoareTripleChecker+Invalid, 701 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 101 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 06:53:52,446 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [631 Valid, 377 Invalid, 701 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 560 Invalid, 0 Unknown, 101 Unchecked, 0.5s Time] [2022-11-19 06:53:52,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2022-11-19 06:53:52,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 364. [2022-11-19 06:53:52,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 322 states have (on average 1.4813664596273293) internal successors, (477), 345 states have internal predecessors, (477), 9 states have call successors, (9), 9 states have call predecessors, (9), 15 states have return successors, (16), 9 states have call predecessors, (16), 9 states have call successors, (16) [2022-11-19 06:53:52,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 502 transitions. [2022-11-19 06:53:52,457 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 502 transitions. Word has length 35 [2022-11-19 06:53:52,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:53:52,457 INFO L495 AbstractCegarLoop]: Abstraction has 364 states and 502 transitions. [2022-11-19 06:53:52,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 4.142857142857143) internal successors, (58), 13 states have internal predecessors, (58), 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) [2022-11-19 06:53:52,457 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 502 transitions. [2022-11-19 06:53:52,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-19 06:53:52,458 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:53:52,458 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:53:52,468 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-19 06:53:52,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-19 06:53:52,664 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-19 06:53:52,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:53:52,664 INFO L85 PathProgramCache]: Analyzing trace with hash 531798487, now seen corresponding path program 1 times [2022-11-19 06:53:52,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:53:52,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054925514] [2022-11-19 06:53:52,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:53:52,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:53:52,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:53:52,918 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 06:53:52,918 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:53:52,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054925514] [2022-11-19 06:53:52,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054925514] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:53:52,919 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:53:52,919 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-19 06:53:52,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330750295] [2022-11-19 06:53:52,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:53:52,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-19 06:53:52,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:53:52,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-19 06:53:52,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-11-19 06:53:52,920 INFO L87 Difference]: Start difference. First operand 364 states and 502 transitions. Second operand has 10 states, 8 states have (on average 4.0) internal successors, (32), 9 states have internal predecessors, (32), 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) [2022-11-19 06:53:53,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:53:53,104 INFO L93 Difference]: Finished difference Result 400 states and 531 transitions. [2022-11-19 06:53:53,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 06:53:53,104 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 4.0) internal successors, (32), 9 states have internal predecessors, (32), 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 37 [2022-11-19 06:53:53,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:53:53,106 INFO L225 Difference]: With dead ends: 400 [2022-11-19 06:53:53,106 INFO L226 Difference]: Without dead ends: 400 [2022-11-19 06:53:53,107 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-11-19 06:53:53,107 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 312 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 312 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 06:53:53,107 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [312 Valid, 92 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 06:53:53,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2022-11-19 06:53:53,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 364. [2022-11-19 06:53:53,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 322 states have (on average 1.4720496894409938) internal successors, (474), 345 states have internal predecessors, (474), 9 states have call successors, (9), 9 states have call predecessors, (9), 15 states have return successors, (16), 9 states have call predecessors, (16), 9 states have call successors, (16) [2022-11-19 06:53:53,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 499 transitions. [2022-11-19 06:53:53,118 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 499 transitions. Word has length 37 [2022-11-19 06:53:53,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:53:53,118 INFO L495 AbstractCegarLoop]: Abstraction has 364 states and 499 transitions. [2022-11-19 06:53:53,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 4.0) internal successors, (32), 9 states have internal predecessors, (32), 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) [2022-11-19 06:53:53,119 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 499 transitions. [2022-11-19 06:53:53,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-19 06:53:53,119 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:53:53,119 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:53:53,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-19 06:53:53,120 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-19 06:53:53,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:53:53,120 INFO L85 PathProgramCache]: Analyzing trace with hash -42763722, now seen corresponding path program 1 times [2022-11-19 06:53:53,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:53:53,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497871906] [2022-11-19 06:53:53,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:53:53,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:53:53,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:53:53,659 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 06:53:53,659 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:53:53,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497871906] [2022-11-19 06:53:53,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497871906] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:53:53,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495772863] [2022-11-19 06:53:53,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:53:53,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:53:53,660 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:53:53,663 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:53:53,675 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-19 06:53:53,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:53:53,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-19 06:53:53,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:53:54,029 INFO L321 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2022-11-19 06:53:54,030 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 15 [2022-11-19 06:53:54,035 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 16 treesize of output 18 [2022-11-19 06:53:54,142 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 [2022-11-19 06:53:54,146 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 17 treesize of output 9 [2022-11-19 06:53:54,170 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 20 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 06:53:54,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:53:54,312 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:53:54,315 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 33 treesize of output 21 [2022-11-19 06:53:54,324 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 10 treesize of output 6 [2022-11-19 06:53:54,523 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 06:53:54,523 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 47 treesize of output 51 [2022-11-19 06:53:54,629 INFO L321 Elim1Store]: treesize reduction 5, result has 84.8 percent of original size [2022-11-19 06:53:54,630 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 49 [2022-11-19 06:53:54,693 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-11-19 06:53:54,694 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 9 [2022-11-19 06:53:54,737 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 20 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 06:53:54,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1495772863] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:53:54,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [281561343] [2022-11-19 06:53:54,740 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2022-11-19 06:53:54,740 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:53:54,740 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:53:54,741 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:53:54,741 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:53:54,847 INFO L321 Elim1Store]: treesize reduction 118, result has 27.2 percent of original size [2022-11-19 06:53:54,847 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 [2022-11-19 06:53:54,864 INFO L321 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2022-11-19 06:53:54,864 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 [2022-11-19 06:53:55,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:53:55,228 INFO L321 Elim1Store]: treesize reduction 52, result has 1.9 percent of original size [2022-11-19 06:53:55,228 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 [2022-11-19 06:53:55,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:53:55,253 INFO L321 Elim1Store]: treesize reduction 52, result has 1.9 percent of original size [2022-11-19 06:53:55,254 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 [2022-11-19 06:53:55,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:53:55,565 INFO L321 Elim1Store]: treesize reduction 52, result has 1.9 percent of original size [2022-11-19 06:53:55,566 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 [2022-11-19 06:53:55,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:53:55,590 INFO L321 Elim1Store]: treesize reduction 52, result has 1.9 percent of original size [2022-11-19 06:53:55,591 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 [2022-11-19 06:53:55,852 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 42 for LOIs [2022-11-19 06:53:55,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:53:56,006 INFO L321 Elim1Store]: treesize reduction 46, result has 62.3 percent of original size [2022-11-19 06:53:56,006 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 [2022-11-19 06:53:56,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:53:56,164 INFO L321 Elim1Store]: treesize reduction 110, result has 28.6 percent of original size [2022-11-19 06:53:56,164 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 [2022-11-19 06:53:56,237 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:54:00,608 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '17535#(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|)) (<= 0 |parse_input_#in~input#1.offset|) (= |parse_input_#in~input#1.offset| |parse_input_~input#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) (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|) (<= |parse_input_#in~input#1.base| 5) (<= |~#commands~0.offset| 0) (= (select |#valid| |~#commands~0.base|) 1) (= |#NULL.base| 0))' at error location [2022-11-19 06:54:00,609 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:54:00,609 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 06:54:00,609 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 10] total 27 [2022-11-19 06:54:00,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577704310] [2022-11-19 06:54:00,609 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 06:54:00,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-19 06:54:00,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:54:00,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-19 06:54:00,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=390, Invalid=1590, Unknown=0, NotChecked=0, Total=1980 [2022-11-19 06:54:00,611 INFO L87 Difference]: Start difference. First operand 364 states and 499 transitions. Second operand has 28 states, 25 states have (on average 3.44) internal successors, (86), 26 states have internal predecessors, (86), 6 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (6), 6 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-19 06:54:01,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:54:01,130 INFO L93 Difference]: Finished difference Result 404 states and 536 transitions. [2022-11-19 06:54:01,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-19 06:54:01,131 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 25 states have (on average 3.44) internal successors, (86), 26 states have internal predecessors, (86), 6 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (6), 6 states have call predecessors, (6), 3 states have call successors, (6) Word has length 39 [2022-11-19 06:54:01,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:54:01,133 INFO L225 Difference]: With dead ends: 404 [2022-11-19 06:54:01,133 INFO L226 Difference]: Without dead ends: 404 [2022-11-19 06:54:01,134 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 86 SyntacticMatches, 8 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1048 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=476, Invalid=1876, Unknown=0, NotChecked=0, Total=2352 [2022-11-19 06:54:01,135 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 235 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 59 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 06:54:01,135 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [235 Valid, 258 Invalid, 334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 239 Invalid, 0 Unknown, 59 Unchecked, 0.2s Time] [2022-11-19 06:54:01,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2022-11-19 06:54:01,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 323. [2022-11-19 06:54:01,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 283 states have (on average 1.441696113074205) internal successors, (408), 306 states have internal predecessors, (408), 8 states have call successors, (8), 8 states have call predecessors, (8), 14 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2022-11-19 06:54:01,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 431 transitions. [2022-11-19 06:54:01,144 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 431 transitions. Word has length 39 [2022-11-19 06:54:01,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:54:01,145 INFO L495 AbstractCegarLoop]: Abstraction has 323 states and 431 transitions. [2022-11-19 06:54:01,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 25 states have (on average 3.44) internal successors, (86), 26 states have internal predecessors, (86), 6 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (6), 6 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-19 06:54:01,145 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 431 transitions. [2022-11-19 06:54:01,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-19 06:54:01,146 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:54:01,146 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:54:01,155 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-19 06:54:01,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:54:01,356 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-19 06:54:01,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:54:01,356 INFO L85 PathProgramCache]: Analyzing trace with hash -1325675335, now seen corresponding path program 1 times [2022-11-19 06:54:01,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:54:01,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419875598] [2022-11-19 06:54:01,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:54:01,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:54:01,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:54:01,655 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:54:01,655 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:54:01,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419875598] [2022-11-19 06:54:01,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419875598] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:54:01,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160238382] [2022-11-19 06:54:01,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:54:01,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:54:01,656 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:54:01,657 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:54:01,683 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-19 06:54:01,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:54:01,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-19 06:54:01,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:54:01,826 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 06:54:01,826 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 [2022-11-19 06:54:01,850 WARN L859 $PredicateComparison]: unable to prove that (exists ((|parse_input_c1_~x~0#1.base| Int)) (= |c_#valid| (store |c_old(#valid)| |parse_input_c1_~x~0#1.base| 1))) is different from true [2022-11-19 06:54:01,866 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-19 06:54:01,866 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 [2022-11-19 06:54:01,914 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 3 not checked. [2022-11-19 06:54:01,914 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:54:02,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160238382] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:54:02,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1847135082] [2022-11-19 06:54:02,070 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2022-11-19 06:54:02,070 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:54:02,070 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:54:02,070 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:54:02,070 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:54:02,207 INFO L321 Elim1Store]: treesize reduction 46, result has 64.6 percent of original size [2022-11-19 06:54:02,207 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 [2022-11-19 06:54:02,431 INFO L321 Elim1Store]: treesize reduction 118, result has 27.2 percent of original size [2022-11-19 06:54:02,431 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 [2022-11-19 06:54:02,695 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 25 for LOIs [2022-11-19 06:54:02,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:54:02,805 INFO L321 Elim1Store]: treesize reduction 110, result has 28.6 percent of original size [2022-11-19 06:54:02,806 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 [2022-11-19 06:54:02,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:54:02,829 INFO L321 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-11-19 06:54:02,829 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 [2022-11-19 06:54:02,859 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:54:05,044 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '18501#(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 [2022-11-19 06:54:05,044 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:54:05,044 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 06:54:05,044 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2022-11-19 06:54:05,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008305133] [2022-11-19 06:54:05,045 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 06:54:05,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-19 06:54:05,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:54:05,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-19 06:54:05,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=709, Unknown=1, NotChecked=56, Total=930 [2022-11-19 06:54:05,046 INFO L87 Difference]: Start difference. First operand 323 states and 431 transitions. Second operand has 13 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 1 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-19 06:54:05,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:54:05,369 INFO L93 Difference]: Finished difference Result 365 states and 450 transitions. [2022-11-19 06:54:05,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-19 06:54:05,370 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 1 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 40 [2022-11-19 06:54:05,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:54:05,371 INFO L225 Difference]: With dead ends: 365 [2022-11-19 06:54:05,371 INFO L226 Difference]: Without dead ends: 365 [2022-11-19 06:54:05,372 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 80 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 442 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=255, Invalid=1154, Unknown=1, NotChecked=72, Total=1482 [2022-11-19 06:54:05,373 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 350 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 350 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 126 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 06:54:05,373 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [350 Valid, 271 Invalid, 337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 190 Invalid, 0 Unknown, 126 Unchecked, 0.2s Time] [2022-11-19 06:54:05,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2022-11-19 06:54:05,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 323. [2022-11-19 06:54:05,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 283 states have (on average 1.431095406360424) internal successors, (405), 306 states have internal predecessors, (405), 8 states have call successors, (8), 8 states have call predecessors, (8), 14 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2022-11-19 06:54:05,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 428 transitions. [2022-11-19 06:54:05,382 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 428 transitions. Word has length 40 [2022-11-19 06:54:05,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:54:05,382 INFO L495 AbstractCegarLoop]: Abstraction has 323 states and 428 transitions. [2022-11-19 06:54:05,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 1 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-19 06:54:05,383 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 428 transitions. [2022-11-19 06:54:05,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-19 06:54:05,383 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:54:05,384 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] [2022-11-19 06:54:05,391 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-11-19 06:54:05,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-11-19 06:54:05,589 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)] === [2022-11-19 06:54:05,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:54:05,590 INFO L85 PathProgramCache]: Analyzing trace with hash -1574744148, now seen corresponding path program 1 times [2022-11-19 06:54:05,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:54:05,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689118692] [2022-11-19 06:54:05,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:54:05,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:54:05,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:54:05,698 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-19 06:54:05,698 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:54:05,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689118692] [2022-11-19 06:54:05,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689118692] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:54:05,699 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:54:05,699 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 06:54:05,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655572602] [2022-11-19 06:54:05,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:54:05,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 06:54:05,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:54:05,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 06:54:05,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:54:05,700 INFO L87 Difference]: Start difference. First operand 323 states and 428 transitions. Second operand has 3 states, 2 states have (on average 15.5) internal successors, (31), 3 states have internal predecessors, (31), 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) [2022-11-19 06:54:05,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:54:05,714 INFO L93 Difference]: Finished difference Result 321 states and 418 transitions. [2022-11-19 06:54:05,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 06:54:05,715 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 15.5) internal successors, (31), 3 states have internal predecessors, (31), 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 [2022-11-19 06:54:05,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:54:05,716 INFO L225 Difference]: With dead ends: 321 [2022-11-19 06:54:05,717 INFO L226 Difference]: Without dead ends: 321 [2022-11-19 06:54:05,717 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 [2022-11-19 06:54:05,718 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 34 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 06:54:05,718 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 47 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 06:54:05,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2022-11-19 06:54:05,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 321. [2022-11-19 06:54:05,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 283 states have (on average 1.3957597173144876) internal successors, (395), 304 states have internal predecessors, (395), 8 states have call successors, (8), 8 states have call predecessors, (8), 14 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2022-11-19 06:54:05,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 418 transitions. [2022-11-19 06:54:05,726 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 418 transitions. Word has length 40 [2022-11-19 06:54:05,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:54:05,726 INFO L495 AbstractCegarLoop]: Abstraction has 321 states and 418 transitions. [2022-11-19 06:54:05,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 15.5) internal successors, (31), 3 states have internal predecessors, (31), 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) [2022-11-19 06:54:05,727 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 418 transitions. [2022-11-19 06:54:05,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-19 06:54:05,727 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:54:05,728 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] [2022-11-19 06:54:05,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-11-19 06:54:05,730 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting parse_inputErr13ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-19 06:54:05,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:54:05,730 INFO L85 PathProgramCache]: Analyzing trace with hash -1574743892, now seen corresponding path program 1 times [2022-11-19 06:54:05,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:54:05,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15188936] [2022-11-19 06:54:05,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:54:05,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:54:05,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:54:05,769 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-19 06:54:05,769 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:54:05,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15188936] [2022-11-19 06:54:05,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15188936] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:54:05,769 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:54:05,770 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 06:54:05,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050810560] [2022-11-19 06:54:05,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:54:05,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 06:54:05,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:54:05,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 06:54:05,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:54:05,773 INFO L87 Difference]: Start difference. First operand 321 states and 418 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 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) [2022-11-19 06:54:05,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:54:05,785 INFO L93 Difference]: Finished difference Result 255 states and 310 transitions. [2022-11-19 06:54:05,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 06:54:05,786 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), 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 40 [2022-11-19 06:54:05,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:54:05,787 INFO L225 Difference]: With dead ends: 255 [2022-11-19 06:54:05,787 INFO L226 Difference]: Without dead ends: 255 [2022-11-19 06:54:05,788 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 [2022-11-19 06:54:05,788 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 9 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 06:54:05,788 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 73 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 06:54:05,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2022-11-19 06:54:05,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 246. [2022-11-19 06:54:05,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 217 states have (on average 1.294930875576037) internal successors, (281), 231 states have internal predecessors, (281), 7 states have call successors, (7), 7 states have call predecessors, (7), 12 states have return successors, (13), 7 states have call predecessors, (13), 7 states have call successors, (13) [2022-11-19 06:54:05,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 301 transitions. [2022-11-19 06:54:05,795 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 301 transitions. Word has length 40 [2022-11-19 06:54:05,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:54:05,795 INFO L495 AbstractCegarLoop]: Abstraction has 246 states and 301 transitions. [2022-11-19 06:54:05,796 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), 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) [2022-11-19 06:54:05,796 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 301 transitions. [2022-11-19 06:54:05,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-19 06:54:05,797 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:54:05,797 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:54:05,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-11-19 06:54:05,797 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting parse_inputErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-19 06:54:05,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:54:05,798 INFO L85 PathProgramCache]: Analyzing trace with hash 1853737624, now seen corresponding path program 1 times [2022-11-19 06:54:05,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:54:05,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174343713] [2022-11-19 06:54:05,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:54:05,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:54:05,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:54:06,145 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:54:06,145 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:54:06,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174343713] [2022-11-19 06:54:06,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174343713] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:54:06,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488545089] [2022-11-19 06:54:06,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:54:06,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:54:06,146 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:54:06,147 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:54:06,171 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-19 06:54:06,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:54:06,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 54 conjunts are in the unsatisfiable core [2022-11-19 06:54:06,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:54:06,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:54:06,742 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 [2022-11-19 06:54:06,761 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 06:54:06,761 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 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-19 06:54:06,770 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 7 treesize of output 3 [2022-11-19 06:54:06,775 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 7 treesize of output 3 [2022-11-19 06:54:06,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:54:06,915 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 [2022-11-19 06:54:07,015 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:54:07,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:54:07,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488545089] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:54:07,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [231620640] [2022-11-19 06:54:07,166 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2022-11-19 06:54:07,166 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:54:07,166 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:54:07,166 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:54:07,166 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:54:07,262 INFO L321 Elim1Store]: treesize reduction 118, result has 27.2 percent of original size [2022-11-19 06:54:07,263 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 [2022-11-19 06:54:07,282 INFO L321 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2022-11-19 06:54:07,282 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 [2022-11-19 06:54:07,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:54:07,617 INFO L321 Elim1Store]: treesize reduction 52, result has 1.9 percent of original size [2022-11-19 06:54:07,624 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 [2022-11-19 06:54:07,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:54:07,648 INFO L321 Elim1Store]: treesize reduction 52, result has 1.9 percent of original size [2022-11-19 06:54:07,648 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 [2022-11-19 06:54:07,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:54:07,945 INFO L321 Elim1Store]: treesize reduction 52, result has 1.9 percent of original size [2022-11-19 06:54:07,946 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 [2022-11-19 06:54:07,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:54:07,969 INFO L321 Elim1Store]: treesize reduction 52, result has 1.9 percent of original size [2022-11-19 06:54:07,970 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 [2022-11-19 06:54:08,227 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 42 for LOIs [2022-11-19 06:54:08,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:54:08,372 INFO L321 Elim1Store]: treesize reduction 110, result has 28.6 percent of original size [2022-11-19 06:54:08,372 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 [2022-11-19 06:54:08,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:54:08,395 INFO L321 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-11-19 06:54:08,396 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 [2022-11-19 06:54:08,430 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:54:12,470 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '20543#(and (= (select |#valid| |parse_input_~input#1.base|) 1) (not (< |parse_input_~input#1.offset| (select |#length| |parse_input_~input#1.base|))) (= 6 |~#commands~0.base|) (<= 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 [2022-11-19 06:54:12,470 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:54:12,471 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 06:54:12,471 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 20 [2022-11-19 06:54:12,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851286478] [2022-11-19 06:54:12,471 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 06:54:12,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-19 06:54:12,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:54:12,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-19 06:54:12,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=1582, Unknown=1, NotChecked=0, Total=1806 [2022-11-19 06:54:12,473 INFO L87 Difference]: Start difference. First operand 246 states and 301 transitions. Second operand has 22 states, 15 states have (on average 4.8) internal successors, (72), 14 states have internal predecessors, (72), 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) [2022-11-19 06:54:14,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:54:14,153 INFO L93 Difference]: Finished difference Result 286 states and 320 transitions. [2022-11-19 06:54:14,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-19 06:54:14,154 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 15 states have (on average 4.8) internal successors, (72), 14 states have internal predecessors, (72), 6 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 41 [2022-11-19 06:54:14,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:54:14,155 INFO L225 Difference]: With dead ends: 286 [2022-11-19 06:54:14,155 INFO L226 Difference]: Without dead ends: 286 [2022-11-19 06:54:14,156 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 58 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1331 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=696, Invalid=3593, Unknown=1, NotChecked=0, Total=4290 [2022-11-19 06:54:14,157 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 667 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 447 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 667 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 447 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 71 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 06:54:14,157 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [667 Valid, 320 Invalid, 581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 447 Invalid, 0 Unknown, 71 Unchecked, 0.4s Time] [2022-11-19 06:54:14,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2022-11-19 06:54:14,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 245. [2022-11-19 06:54:14,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 218 states have (on average 1.2568807339449541) internal successors, (274), 230 states have internal predecessors, (274), 7 states have call successors, (7), 7 states have call predecessors, (7), 11 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) [2022-11-19 06:54:14,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 292 transitions. [2022-11-19 06:54:14,164 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 292 transitions. Word has length 41 [2022-11-19 06:54:14,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:54:14,164 INFO L495 AbstractCegarLoop]: Abstraction has 245 states and 292 transitions. [2022-11-19 06:54:14,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 15 states have (on average 4.8) internal successors, (72), 14 states have internal predecessors, (72), 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) [2022-11-19 06:54:14,165 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 292 transitions. [2022-11-19 06:54:14,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-19 06:54:14,165 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:54:14,166 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] [2022-11-19 06:54:14,175 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-19 06:54:14,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:54:14,372 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting parse_inputErr11ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-19 06:54:14,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:54:14,373 INFO L85 PathProgramCache]: Analyzing trace with hash -1572428260, now seen corresponding path program 1 times [2022-11-19 06:54:14,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:54:14,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290336964] [2022-11-19 06:54:14,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:54:14,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:54:14,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:54:14,478 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-19 06:54:14,478 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:54:14,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290336964] [2022-11-19 06:54:14,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290336964] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:54:14,478 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:54:14,479 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 06:54:14,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822853603] [2022-11-19 06:54:14,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:54:14,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 06:54:14,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:54:14,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 06:54:14,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:54:14,480 INFO L87 Difference]: Start difference. First operand 245 states and 292 transitions. Second operand has 3 states, 2 states have (on average 16.0) internal successors, (32), 3 states have internal predecessors, (32), 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) [2022-11-19 06:54:14,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:54:14,493 INFO L93 Difference]: Finished difference Result 244 states and 288 transitions. [2022-11-19 06:54:14,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 06:54:14,494 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 16.0) internal successors, (32), 3 states have internal predecessors, (32), 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 41 [2022-11-19 06:54:14,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:54:14,495 INFO L225 Difference]: With dead ends: 244 [2022-11-19 06:54:14,495 INFO L226 Difference]: Without dead ends: 244 [2022-11-19 06:54:14,495 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 [2022-11-19 06:54:14,496 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 18 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 06:54:14,496 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 32 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 06:54:14,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2022-11-19 06:54:14,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 244. [2022-11-19 06:54:14,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 218 states have (on average 1.238532110091743) internal successors, (270), 229 states have internal predecessors, (270), 7 states have call successors, (7), 7 states have call predecessors, (7), 11 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) [2022-11-19 06:54:14,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 288 transitions. [2022-11-19 06:54:14,507 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 288 transitions. Word has length 41 [2022-11-19 06:54:14,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:54:14,507 INFO L495 AbstractCegarLoop]: Abstraction has 244 states and 288 transitions. [2022-11-19 06:54:14,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 16.0) internal successors, (32), 3 states have internal predecessors, (32), 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) [2022-11-19 06:54:14,508 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 288 transitions. [2022-11-19 06:54:14,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-19 06:54:14,508 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:54:14,509 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] [2022-11-19 06:54:14,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-11-19 06:54:14,509 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting parse_inputErr12ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-19 06:54:14,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:54:14,509 INFO L85 PathProgramCache]: Analyzing trace with hash -1500635730, now seen corresponding path program 1 times [2022-11-19 06:54:14,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:54:14,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4599322] [2022-11-19 06:54:14,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:54:14,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:54:14,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:54:14,618 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-19 06:54:14,618 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:54:14,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4599322] [2022-11-19 06:54:14,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4599322] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:54:14,619 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:54:14,619 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 06:54:14,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975946089] [2022-11-19 06:54:14,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:54:14,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 06:54:14,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:54:14,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 06:54:14,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:54:14,621 INFO L87 Difference]: Start difference. First operand 244 states and 288 transitions. Second operand has 3 states, 2 states have (on average 16.5) internal successors, (33), 3 states have internal predecessors, (33), 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) [2022-11-19 06:54:14,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:54:14,654 INFO L93 Difference]: Finished difference Result 263 states and 298 transitions. [2022-11-19 06:54:14,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 06:54:14,655 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 16.5) internal successors, (33), 3 states have internal predecessors, (33), 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 [2022-11-19 06:54:14,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:54:14,656 INFO L225 Difference]: With dead ends: 263 [2022-11-19 06:54:14,656 INFO L226 Difference]: Without dead ends: 263 [2022-11-19 06:54:14,656 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 [2022-11-19 06:54:14,657 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 14 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 06:54:14,658 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 69 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 06:54:14,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2022-11-19 06:54:14,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 244. [2022-11-19 06:54:14,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 218 states have (on average 1.224770642201835) internal successors, (267), 229 states have internal predecessors, (267), 7 states have call successors, (7), 7 states have call predecessors, (7), 11 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) [2022-11-19 06:54:14,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 285 transitions. [2022-11-19 06:54:14,664 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 285 transitions. Word has length 42 [2022-11-19 06:54:14,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:54:14,664 INFO L495 AbstractCegarLoop]: Abstraction has 244 states and 285 transitions. [2022-11-19 06:54:14,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 16.5) internal successors, (33), 3 states have internal predecessors, (33), 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) [2022-11-19 06:54:14,665 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 285 transitions. [2022-11-19 06:54:14,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-19 06:54:14,665 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:54:14,666 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:54:14,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-11-19 06:54:14,666 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-19 06:54:14,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:54:14,666 INFO L85 PathProgramCache]: Analyzing trace with hash 253450462, now seen corresponding path program 1 times [2022-11-19 06:54:14,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:54:14,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651851863] [2022-11-19 06:54:14,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:54:14,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:54:14,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:54:15,034 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-19 06:54:15,034 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:54:15,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651851863] [2022-11-19 06:54:15,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651851863] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:54:15,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213090210] [2022-11-19 06:54:15,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:54:15,035 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:54:15,035 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:54:15,039 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:54:15,063 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-19 06:54:15,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:54:15,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-19 06:54:15,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:54:15,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:54:15,352 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 [2022-11-19 06:54:15,520 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-19 06:54:15,520 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 [2022-11-19 06:54:15,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:54:15,585 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 [2022-11-19 06:54:15,721 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:54:15,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:54:15,871 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-19 06:54:15,871 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 12 [2022-11-19 06:54:16,140 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-19 06:54:16,140 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 12 [2022-11-19 06:54:20,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [213090210] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:54:20,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1816249476] [2022-11-19 06:54:20,320 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2022-11-19 06:54:20,320 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:54:20,320 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:54:20,321 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:54:20,321 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:54:20,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:54:20,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:54:20,552 INFO L321 Elim1Store]: treesize reduction 165, result has 19.9 percent of original size [2022-11-19 06:54:20,553 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 [2022-11-19 06:54:20,655 INFO L321 Elim1Store]: treesize reduction 205, result has 30.0 percent of original size [2022-11-19 06:54:20,656 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 [2022-11-19 06:54:21,476 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 25 for LOIs [2022-11-19 06:54:21,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:54:21,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:54:21,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:54:21,804 INFO L321 Elim1Store]: treesize reduction 140, result has 14.1 percent of original size [2022-11-19 06:54:21,805 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 219 treesize of output 218 [2022-11-19 06:54:21,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:54:21,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:54:21,884 INFO L321 Elim1Store]: treesize reduction 166, result has 23.9 percent of original size [2022-11-19 06:54:21,884 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 219 treesize of output 242 [2022-11-19 06:54:22,024 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:54:27,282 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '22386#(and (<= |parse_input_~input#1.offset| 0) (= 6 |~#commands~0.base|) (<= 0 ~global~0.offset) (<= 3 |parse_input_~input#1.base|) (<= |#NULL.offset| 0) (<= 0 |parse_input_~input#1.offset|) (<= 0 |parse_input_#in~input#1.offset|) (<= 0 |~#commands~0.offset|) (<= |parse_input_#in~input#1.offset| 0) (<= ~global~0.offset 0) (not (<= (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset| 4) (select |#length| |~#commands~0.base|))) (<= |parse_input_~input#1.base| 5) (< |parse_input_~i~0#1| 2) (<= 3 |parse_input_#in~input#1.base|) (<= 0 |#NULL.offset|) (= |old(~global~0.offset)| 0) (<= 0 |#StackHeapBarrier|) (<= |parse_input_#in~input#1.base| 5) (<= 0 |parse_input_~i~0#1|) (<= |~#commands~0.offset| 0) (= |#NULL.base| 0))' at error location [2022-11-19 06:54:27,282 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:54:27,282 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 06:54:27,282 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 19 [2022-11-19 06:54:27,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921628893] [2022-11-19 06:54:27,283 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 06:54:27,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-19 06:54:27,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:54:27,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-19 06:54:27,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=1630, Unknown=5, NotChecked=0, Total=1892 [2022-11-19 06:54:27,284 INFO L87 Difference]: Start difference. First operand 244 states and 285 transitions. Second operand has 21 states, 18 states have (on average 4.333333333333333) internal successors, (78), 18 states have internal predecessors, (78), 4 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-19 06:54:28,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:54:28,200 INFO L93 Difference]: Finished difference Result 285 states and 316 transitions. [2022-11-19 06:54:28,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-19 06:54:28,201 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 18 states have (on average 4.333333333333333) internal successors, (78), 18 states have internal predecessors, (78), 4 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 45 [2022-11-19 06:54:28,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:54:28,202 INFO L225 Difference]: With dead ends: 285 [2022-11-19 06:54:28,202 INFO L226 Difference]: Without dead ends: 285 [2022-11-19 06:54:28,203 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 88 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1274 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=629, Invalid=3148, Unknown=5, NotChecked=0, Total=3782 [2022-11-19 06:54:28,204 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 383 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 383 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 80 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 06:54:28,204 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [383 Valid, 184 Invalid, 441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 298 Invalid, 0 Unknown, 80 Unchecked, 0.3s Time] [2022-11-19 06:54:28,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2022-11-19 06:54:28,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 241. [2022-11-19 06:54:28,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 218 states have (on average 1.1972477064220184) internal successors, (261), 226 states have internal predecessors, (261), 7 states have call successors, (7), 7 states have call predecessors, (7), 11 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) [2022-11-19 06:54:28,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 279 transitions. [2022-11-19 06:54:28,209 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 279 transitions. Word has length 45 [2022-11-19 06:54:28,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:54:28,209 INFO L495 AbstractCegarLoop]: Abstraction has 241 states and 279 transitions. [2022-11-19 06:54:28,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 18 states have (on average 4.333333333333333) internal successors, (78), 18 states have internal predecessors, (78), 4 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-19 06:54:28,209 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 279 transitions. [2022-11-19 06:54:28,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-19 06:54:28,210 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:54:28,210 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:54:28,224 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-19 06:54:28,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-19 06:54:28,417 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)] === [2022-11-19 06:54:28,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:54:28,417 INFO L85 PathProgramCache]: Analyzing trace with hash -732970320, now seen corresponding path program 1 times [2022-11-19 06:54:28,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:54:28,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049109770] [2022-11-19 06:54:28,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:54:28,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:54:28,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:54:28,852 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:54:28,853 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:54:28,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049109770] [2022-11-19 06:54:28,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049109770] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:54:28,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613931723] [2022-11-19 06:54:28,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:54:28,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:54:28,854 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:54:28,855 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:54:28,883 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-19 06:54:28,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:54:28,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-19 06:54:28,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:54:29,157 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 06:54:29,158 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 [2022-11-19 06:54:29,297 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-19 06:54:29,298 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 [2022-11-19 06:54:29,460 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 [2022-11-19 06:54:29,482 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 06:54:29,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:54:29,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [613931723] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:54:29,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [392251165] [2022-11-19 06:54:29,759 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2022-11-19 06:54:29,760 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:54:29,760 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:54:29,760 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:54:29,760 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:54:29,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:54:29,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:54:29,994 INFO L321 Elim1Store]: treesize reduction 165, result has 19.9 percent of original size [2022-11-19 06:54:29,995 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 [2022-11-19 06:54:30,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:54:30,082 INFO L321 Elim1Store]: treesize reduction 187, result has 29.7 percent of original size [2022-11-19 06:54:30,082 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 [2022-11-19 06:54:30,939 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 25 for LOIs [2022-11-19 06:54:31,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:54:31,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:54:31,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:54:31,263 INFO L321 Elim1Store]: treesize reduction 157, result has 20.7 percent of original size [2022-11-19 06:54:31,264 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 [2022-11-19 06:54:31,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:54:31,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:54:31,351 INFO L321 Elim1Store]: treesize reduction 179, result has 30.6 percent of original size [2022-11-19 06:54:31,352 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 221 treesize of output 266 [2022-11-19 06:54:31,651 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:54:37,398 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '23215#(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 [2022-11-19 06:54:37,398 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:54:37,398 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 06:54:37,398 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 18 [2022-11-19 06:54:37,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810148608] [2022-11-19 06:54:37,398 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 06:54:37,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-19 06:54:37,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:54:37,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-19 06:54:37,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=1403, Unknown=4, NotChecked=0, Total=1640 [2022-11-19 06:54:37,400 INFO L87 Difference]: Start difference. First operand 241 states and 279 transitions. Second operand has 20 states, 17 states have (on average 4.176470588235294) internal successors, (71), 17 states have internal predecessors, (71), 4 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-19 06:54:38,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:54:38,248 INFO L93 Difference]: Finished difference Result 274 states and 308 transitions. [2022-11-19 06:54:38,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-19 06:54:38,248 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 4.176470588235294) internal successors, (71), 17 states have internal predecessors, (71), 4 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 46 [2022-11-19 06:54:38,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:54:38,250 INFO L225 Difference]: With dead ends: 274 [2022-11-19 06:54:38,250 INFO L226 Difference]: Without dead ends: 274 [2022-11-19 06:54:38,251 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 91 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1160 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=579, Invalid=2956, Unknown=5, NotChecked=0, Total=3540 [2022-11-19 06:54:38,251 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 479 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 479 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 82 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 06:54:38,252 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [479 Valid, 216 Invalid, 384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 249 Invalid, 0 Unknown, 82 Unchecked, 0.2s Time] [2022-11-19 06:54:38,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2022-11-19 06:54:38,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 241. [2022-11-19 06:54:38,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 218 states have (on average 1.1926605504587156) internal successors, (260), 226 states have internal predecessors, (260), 7 states have call successors, (7), 7 states have call predecessors, (7), 11 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) [2022-11-19 06:54:38,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 278 transitions. [2022-11-19 06:54:38,258 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 278 transitions. Word has length 46 [2022-11-19 06:54:38,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:54:38,258 INFO L495 AbstractCegarLoop]: Abstraction has 241 states and 278 transitions. [2022-11-19 06:54:38,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 4.176470588235294) internal successors, (71), 17 states have internal predecessors, (71), 4 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-19 06:54:38,259 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 278 transitions. [2022-11-19 06:54:38,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-19 06:54:38,259 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:54:38,259 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:54:38,283 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-19 06:54:38,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-11-19 06:54:38,471 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)] === [2022-11-19 06:54:38,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:54:38,472 INFO L85 PathProgramCache]: Analyzing trace with hash -1247243395, now seen corresponding path program 1 times [2022-11-19 06:54:38,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:54:38,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071468762] [2022-11-19 06:54:38,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:54:38,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:54:38,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:54:39,093 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:54:39,093 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:54:39,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071468762] [2022-11-19 06:54:39,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071468762] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:54:39,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813096625] [2022-11-19 06:54:39,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:54:39,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:54:39,094 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:54:39,095 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:54:39,099 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-19 06:54:39,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:54:39,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 58 conjunts are in the unsatisfiable core [2022-11-19 06:54:39,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:54:39,824 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 06:54:39,825 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 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-19 06:54:39,833 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 [2022-11-19 06:54:40,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:54:40,274 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 [2022-11-19 06:54:40,621 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 22 treesize of output 10 [2022-11-19 06:54:40,629 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 06:54:40,629 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 22 treesize of output 10 [2022-11-19 06:54:40,661 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:54:40,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:54:40,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813096625] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:54:40,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1822028206] [2022-11-19 06:54:40,959 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2022-11-19 06:54:40,959 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:54:40,959 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:54:40,960 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:54:40,960 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:54:41,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:54:41,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:54:41,168 INFO L321 Elim1Store]: treesize reduction 165, result has 19.9 percent of original size [2022-11-19 06:54:41,169 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 [2022-11-19 06:54:41,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:54:41,249 INFO L321 Elim1Store]: treesize reduction 187, result has 29.7 percent of original size [2022-11-19 06:54:41,250 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 [2022-11-19 06:54:41,744 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 25 for LOIs [2022-11-19 06:54:42,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:54:42,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:54:42,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:54:42,056 INFO L321 Elim1Store]: treesize reduction 157, result has 20.7 percent of original size [2022-11-19 06:54:42,056 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 [2022-11-19 06:54:42,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:54:42,157 INFO L321 Elim1Store]: treesize reduction 197, result has 30.9 percent of original size [2022-11-19 06:54:42,157 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 [2022-11-19 06:54:42,408 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:54:48,509 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '23998#(and (<= 0 ~global~0.offset) (= (select |#valid| |parse_input_#t~mem3#1.base|) 1) (<= ~global~0.offset 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|))) (<= 3 |parse_input_#in~input#1.base|) (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 [2022-11-19 06:54:48,509 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:54:48,510 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 06:54:48,510 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 23 [2022-11-19 06:54:48,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589661366] [2022-11-19 06:54:48,510 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 06:54:48,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-19 06:54:48,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:54:48,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-19 06:54:48,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=1915, Unknown=1, NotChecked=0, Total=2162 [2022-11-19 06:54:48,512 INFO L87 Difference]: Start difference. First operand 241 states and 278 transitions. Second operand has 25 states, 20 states have (on average 4.2) internal successors, (84), 19 states have internal predecessors, (84), 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) [2022-11-19 06:54:51,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:54:51,232 INFO L93 Difference]: Finished difference Result 281 states and 313 transitions. [2022-11-19 06:54:51,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-11-19 06:54:51,233 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 20 states have (on average 4.2) internal successors, (84), 19 states have internal predecessors, (84), 6 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 47 [2022-11-19 06:54:51,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:54:51,234 INFO L225 Difference]: With dead ends: 281 [2022-11-19 06:54:51,234 INFO L226 Difference]: Without dead ends: 281 [2022-11-19 06:54:51,236 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2008 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=921, Invalid=5398, Unknown=1, NotChecked=0, Total=6320 [2022-11-19 06:54:51,237 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 748 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 590 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 748 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 864 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 590 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 198 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-19 06:54:51,237 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [748 Valid, 299 Invalid, 864 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 590 Invalid, 0 Unknown, 198 Unchecked, 0.6s Time] [2022-11-19 06:54:51,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2022-11-19 06:54:51,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 203. [2022-11-19 06:54:51,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 184 states have (on average 1.184782608695652) internal successors, (218), 190 states have internal predecessors, (218), 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) [2022-11-19 06:54:51,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 233 transitions. [2022-11-19 06:54:51,242 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 233 transitions. Word has length 47 [2022-11-19 06:54:51,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:54:51,242 INFO L495 AbstractCegarLoop]: Abstraction has 203 states and 233 transitions. [2022-11-19 06:54:51,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 20 states have (on average 4.2) internal successors, (84), 19 states have internal predecessors, (84), 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) [2022-11-19 06:54:51,242 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 233 transitions. [2022-11-19 06:54:51,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-19 06:54:51,243 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:54:51,244 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 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] [2022-11-19 06:54:51,254 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-19 06:54:51,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-19 06:54:51,444 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-19 06:54:51,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:54:51,445 INFO L85 PathProgramCache]: Analyzing trace with hash -597760478, now seen corresponding path program 1 times [2022-11-19 06:54:51,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:54:51,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915431810] [2022-11-19 06:54:51,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:54:51,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:54:51,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:54:52,157 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:54:52,157 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:54:52,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915431810] [2022-11-19 06:54:52,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915431810] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:54:52,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319022508] [2022-11-19 06:54:52,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:54:52,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:54:52,158 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:54:52,160 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:54:52,163 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-19 06:54:52,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:54:52,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-19 06:54:52,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:54:52,411 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-19 06:54:52,411 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 11 treesize of output 11 [2022-11-19 06:54:52,734 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-19 06:54:52,735 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 [2022-11-19 06:54:52,874 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 [2022-11-19 06:54:52,897 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 06:54:52,897 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:54:52,975 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 40 treesize of output 28 [2022-11-19 06:54:53,185 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 06:54:53,185 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 36 treesize of output 40 [2022-11-19 06:54:53,547 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 06:54:53,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319022508] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:54:53,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [246908495] [2022-11-19 06:54:53,549 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2022-11-19 06:54:53,549 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:54:53,549 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:54:53,549 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:54:53,550 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:54:53,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:54:53,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:54:53,754 INFO L321 Elim1Store]: treesize reduction 165, result has 19.9 percent of original size [2022-11-19 06:54:53,755 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 [2022-11-19 06:54:53,850 INFO L321 Elim1Store]: treesize reduction 205, result has 30.0 percent of original size [2022-11-19 06:54:53,851 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 [2022-11-19 06:54:54,041 INFO L321 Elim1Store]: treesize reduction 173, result has 41.0 percent of original size [2022-11-19 06:54:54,042 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 200 treesize of output 281 [2022-11-19 06:54:54,722 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 26 for LOIs [2022-11-19 06:54:55,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:54:55,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:54:55,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:54:55,047 INFO L321 Elim1Store]: treesize reduction 157, result has 20.7 percent of original size [2022-11-19 06:54:55,047 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 226 treesize of output 240 [2022-11-19 06:54:55,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:54:55,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:54:55,138 INFO L321 Elim1Store]: treesize reduction 179, result has 30.6 percent of original size [2022-11-19 06:54:55,139 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 215 treesize of output 260 [2022-11-19 06:54:55,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:54:55,405 INFO L321 Elim1Store]: treesize reduction 181, result has 36.5 percent of original size [2022-11-19 06:54:55,406 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 13 case distinctions, treesize of input 230 treesize of output 295 [2022-11-19 06:54:55,839 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:55:02,506 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '24904#(and (<= 0 |old(~global~0.offset)|) (<= 0 ~global~0.offset) (<= ~global~0.offset 0) (or (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$.base| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset|))) (= |parse_input_~i~0#1| 0) (= |#NULL.offset| 0) (= |parse_input_#in~input#1.offset| 0) (= (select |#valid| |~#commands~0.base|) 1) (= |#NULL.base| 0)) (and (= (select |#valid| |parse_input_~input#1.base|) 1) (= 6 |~#commands~0.base|) (< |parse_input_~input#1.offset| (select |#length| |parse_input_~input#1.base|)) (< (select (select |#memory_$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|))) (= (select |#valid| |~#commands~0.base|) 1) (= |#NULL.base| 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))' at error location [2022-11-19 06:55:02,506 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:55:02,506 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 06:55:02,506 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 12] total 36 [2022-11-19 06:55:02,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373555778] [2022-11-19 06:55:02,507 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 06:55:02,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-19 06:55:02,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:55:02,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-19 06:55:02,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=355, Invalid=2725, Unknown=0, NotChecked=0, Total=3080 [2022-11-19 06:55:02,508 INFO L87 Difference]: Start difference. First operand 203 states and 233 transitions. Second operand has 38 states, 33 states have (on average 3.9393939393939394) internal successors, (130), 29 states have internal predecessors, (130), 7 states have call successors, (9), 9 states have call predecessors, (9), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-19 06:55:03,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:55:03,656 INFO L93 Difference]: Finished difference Result 229 states and 257 transitions. [2022-11-19 06:55:03,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-19 06:55:03,656 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 33 states have (on average 3.9393939393939394) internal successors, (130), 29 states have internal predecessors, (130), 7 states have call successors, (9), 9 states have call predecessors, (9), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 51 [2022-11-19 06:55:03,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:55:03,657 INFO L225 Difference]: With dead ends: 229 [2022-11-19 06:55:03,657 INFO L226 Difference]: Without dead ends: 229 [2022-11-19 06:55:03,658 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 108 SyntacticMatches, 12 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1974 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=724, Invalid=3968, Unknown=0, NotChecked=0, Total=4692 [2022-11-19 06:55:03,658 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 505 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 545 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 505 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 750 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 545 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 24 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 06:55:03,658 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [505 Valid, 240 Invalid, 750 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 545 Invalid, 0 Unknown, 24 Unchecked, 0.4s Time] [2022-11-19 06:55:03,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2022-11-19 06:55:03,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 203. [2022-11-19 06:55:03,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 184 states have (on average 1.1793478260869565) internal successors, (217), 190 states have internal predecessors, (217), 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) [2022-11-19 06:55:03,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 232 transitions. [2022-11-19 06:55:03,665 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 232 transitions. Word has length 51 [2022-11-19 06:55:03,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:55:03,665 INFO L495 AbstractCegarLoop]: Abstraction has 203 states and 232 transitions. [2022-11-19 06:55:03,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 33 states have (on average 3.9393939393939394) internal successors, (130), 29 states have internal predecessors, (130), 7 states have call successors, (9), 9 states have call predecessors, (9), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-19 06:55:03,666 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 232 transitions. [2022-11-19 06:55:03,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-19 06:55:03,667 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:55:03,667 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:55:03,675 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-11-19 06:55:03,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:55:03,875 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-19 06:55:03,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:55:03,875 INFO L85 PathProgramCache]: Analyzing trace with hash 86206807, now seen corresponding path program 1 times [2022-11-19 06:55:03,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:55:03,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590502094] [2022-11-19 06:55:03,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:55:03,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:55:03,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-19 06:55:03,908 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-19 06:55:03,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-19 06:55:03,954 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-19 06:55:03,954 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-19 06:55:03,955 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK (19 of 20 remaining) [2022-11-19 06:55:03,957 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 20 remaining) [2022-11-19 06:55:03,958 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 20 remaining) [2022-11-19 06:55:03,958 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (16 of 20 remaining) [2022-11-19 06:55:03,958 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (15 of 20 remaining) [2022-11-19 06:55:03,958 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE (14 of 20 remaining) [2022-11-19 06:55:03,959 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE (13 of 20 remaining) [2022-11-19 06:55:03,959 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 20 remaining) [2022-11-19 06:55:03,959 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 20 remaining) [2022-11-19 06:55:03,959 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 20 remaining) [2022-11-19 06:55:03,959 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 20 remaining) [2022-11-19 06:55:03,960 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr10ASSERT_VIOLATIONMEMORY_FREE (8 of 20 remaining) [2022-11-19 06:55:03,960 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr11ASSERT_VIOLATIONMEMORY_FREE (7 of 20 remaining) [2022-11-19 06:55:03,960 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr12ASSERT_VIOLATIONMEMORY_FREE (6 of 20 remaining) [2022-11-19 06:55:03,960 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr13ASSERT_VIOLATIONMEMORY_FREE (5 of 20 remaining) [2022-11-19 06:55:03,960 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr14ASSERT_VIOLATIONMEMORY_FREE (4 of 20 remaining) [2022-11-19 06:55:03,961 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr15ASSERT_VIOLATIONMEMORY_FREE (3 of 20 remaining) [2022-11-19 06:55:03,961 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr16ASSERT_VIOLATIONMEMORY_FREE (2 of 20 remaining) [2022-11-19 06:55:03,961 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr17ASSERT_VIOLATIONMEMORY_FREE (1 of 20 remaining) [2022-11-19 06:55:03,961 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr18ASSERT_VIOLATIONMEMORY_FREE (0 of 20 remaining) [2022-11-19 06:55:03,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-11-19 06:55:03,965 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] [2022-11-19 06:55:03,968 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-19 06:55:04,011 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.11 06:55:04 BoogieIcfgContainer [2022-11-19 06:55:04,012 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-19 06:55:04,012 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-19 06:55:04,012 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-19 06:55:04,013 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-19 06:55:04,013 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 06:52:11" (3/4) ... [2022-11-19 06:55:04,016 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-11-19 06:55:04,017 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-19 06:55:04,017 INFO L158 Benchmark]: Toolchain (without parser) took 174216.44ms. Allocated memory was 132.1MB in the beginning and 408.9MB in the end (delta: 276.8MB). Free memory was 98.7MB in the beginning and 136.5MB in the end (delta: -37.9MB). Peak memory consumption was 238.8MB. Max. memory is 16.1GB. [2022-11-19 06:55:04,017 INFO L158 Benchmark]: CDTParser took 0.25ms. Allocated memory is still 98.6MB. Free memory was 55.5MB in the beginning and 55.5MB in the end (delta: 76.9kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-19 06:55:04,017 INFO L158 Benchmark]: CACSL2BoogieTranslator took 639.99ms. Allocated memory is still 132.1MB. Free memory was 98.6MB in the beginning and 97.1MB in the end (delta: 1.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-19 06:55:04,018 INFO L158 Benchmark]: Boogie Procedure Inliner took 72.24ms. Allocated memory is still 132.1MB. Free memory was 97.1MB in the beginning and 95.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-19 06:55:04,018 INFO L158 Benchmark]: Boogie Preprocessor took 56.72ms. Allocated memory is still 132.1MB. Free memory was 95.0MB in the beginning and 93.4MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-19 06:55:04,018 INFO L158 Benchmark]: RCFGBuilder took 572.33ms. Allocated memory is still 132.1MB. Free memory was 93.4MB in the beginning and 75.1MB in the end (delta: 18.3MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. [2022-11-19 06:55:04,018 INFO L158 Benchmark]: TraceAbstraction took 172861.74ms. Allocated memory was 132.1MB in the beginning and 408.9MB in the end (delta: 276.8MB). Free memory was 74.1MB in the beginning and 137.6MB in the end (delta: -63.5MB). Peak memory consumption was 216.4MB. Max. memory is 16.1GB. [2022-11-19 06:55:04,019 INFO L158 Benchmark]: Witness Printer took 4.57ms. Allocated memory is still 408.9MB. Free memory was 137.6MB in the beginning and 136.5MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-19 06:55:04,019 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 98.6MB. Free memory was 55.5MB in the beginning and 55.5MB in the end (delta: 76.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 639.99ms. Allocated memory is still 132.1MB. Free memory was 98.6MB in the beginning and 97.1MB in the end (delta: 1.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 72.24ms. Allocated memory is still 132.1MB. Free memory was 97.1MB in the beginning and 95.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 56.72ms. Allocated memory is still 132.1MB. Free memory was 95.0MB in the beginning and 93.4MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 572.33ms. Allocated memory is still 132.1MB. Free memory was 93.4MB in the beginning and 75.1MB in the end (delta: 18.3MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. * TraceAbstraction took 172861.74ms. Allocated memory was 132.1MB in the beginning and 408.9MB in the end (delta: 276.8MB). Free memory was 74.1MB in the beginning and 137.6MB in the end (delta: -63.5MB). Peak memory consumption was 216.4MB. Max. memory is 16.1GB. * Witness Printer took 4.57ms. Allocated memory is still 408.9MB. Free memory was 137.6MB in the beginning and 136.5MB 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, overapproximation of memtrack at line 721. Possible FailurePath: [L686] char *global = 0; [L685] int state = STATE_1; [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 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={3:0}, input={3:0}, 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) [L706] COND FALSE !(\read(*global)) [L708] global = x [L709] state = STATE_2 [L695] RET commands[i].function() [L722] RET parse_input("c1") VAL [commands={6:0}, global={-3:0}, state=1] [L723] CALL parse_input("c1") VAL [\old(global)=0, \old(global)=-3, \old(state)=1, commands={6:0}, global={-3:0}, state=1] [L692] int i = 0; VAL [\old(global)=-3, \old(global)=0, \old(state)=1, commands={6:0}, global={-3:0}, i=0, input={4:0}, input={4:0}, state=1] [L692] COND TRUE i < 2 VAL [\old(global)=-3, \old(global)=0, \old(state)=1, commands={6:0}, global={-3:0}, i=0, input={4:0}, input={4:0}, state=1] [L693] EXPR commands[i].name VAL [\old(global)=0, \old(global)=-3, \old(state)=1, commands={6:0}, commands[i].name={1:0}, global={-3:0}, i=0, input={4:0}, input={4:0}, state=1] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=-3, \old(global)=0, \old(state)=1, commands={6:0}, commands[i].name={1:0}, global={-3:0}, i=0, input={4:0}, input={4:0}, state=1] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=-3, \old(global)=0, \old(state)=1, commands={6:0}, commands[i].name={1:0}, global={-3:0}, i=0, input={4:0}, input={4:0}, state=1] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=-3, \old(global)=0, \old(state)=1, commands={6:0}, commands[i].name={1:0}, global={-3:0}, i=0, input={4:0}, input={4:0}, state=1] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=-3, \old(global)=0, \old(state)=1, commands={6:0}, commands[i].name={1:0}, global={-3:0}, i=0, input={4:0}, input={4:0}, state=1] [L693] COND TRUE strcmp(commands[i].name,input) == 0 [L694] EXPR commands[i].state_needed VAL [\old(global)=0, \old(global)=-3, \old(state)=1, commands={6:0}, commands[i].state_needed=0, global={-3:0}, i=0, input={4:0}, input={4:0}, state=1] [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) [L706] COND TRUE \read(*global) [L708] global = x [L709] state = STATE_2 [L695] RET commands[i].function() [L723] RET parse_input("c1") VAL [commands={6:0}, global={7:0}, state=1] [L724] CALL parse_input("c2") VAL [\old(global)=0, \old(global)=7, \old(state)=1, commands={6:0}, global={7:0}, state=1] [L692] int i = 0; VAL [\old(global)=0, \old(global)=7, \old(state)=1, commands={6:0}, global={7:0}, i=0, input={5:0}, input={5:0}, state=1] [L692] COND TRUE i < 2 VAL [\old(global)=7, \old(global)=0, \old(state)=1, commands={6:0}, global={7:0}, i=0, input={5:0}, input={5:0}, state=1] [L693] EXPR commands[i].name VAL [\old(global)=7, \old(global)=0, \old(state)=1, commands={6:0}, commands[i].name={1:0}, global={7:0}, i=0, input={5:0}, input={5:0}, state=1] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=0, \old(global)=7, \old(state)=1, commands={6:0}, commands[i].name={1:0}, global={7:0}, i=0, input={5:0}, input={5:0}, state=1] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=7, \old(global)=0, \old(state)=1, commands={6:0}, commands[i].name={1:0}, global={7:0}, i=0, input={5:0}, input={5:0}, state=1] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=7, \old(global)=0, \old(state)=1, commands={6:0}, commands[i].name={1:0}, global={7:0}, i=0, input={5:0}, input={5:0}, state=1] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=7, \old(global)=0, \old(state)=1, commands={6:0}, commands[i].name={1:0}, global={7:0}, i=0, input={5:0}, input={5:0}, state=1] [L693] COND TRUE strcmp(commands[i].name,input) == 0 [L694] EXPR commands[i].state_needed VAL [\old(global)=0, \old(global)=7, \old(state)=1, commands={6:0}, commands[i].state_needed=0, global={7:0}, i=0, input={5:0}, input={5:0}, state=1] [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) [L706] COND TRUE \read(*global) [L708] global = x [L709] state = STATE_2 [L695] RET commands[i].function() [L724] RET parse_input("c2") VAL [commands={6:0}, global={-6:0}, state=1] [L725] return 0; VAL [\result=0, commands={6:0}, global={-6:0}, 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: 714]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 714]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 714]: 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: 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. - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 54 locations, 20 error locations. Started 1 CEGAR loops. OverallTime: 172.8s, OverallIterations: 31, TraceHistogramMax: 4, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 18.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 10069 SdHoareTripleChecker+Valid, 7.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 10068 mSDsluCounter, 6339 SdHoareTripleChecker+Invalid, 6.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 1266 IncrementalHoareTripleChecker+Unchecked, 5018 mSDsCounter, 1072 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 6875 IncrementalHoareTripleChecker+Invalid, 9213 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1072 mSolverCounterUnsat, 1321 mSDtfsCounter, 6875 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2012 GetRequests, 1042 SyntacticMatches, 60 SemanticMatches, 910 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 16081 ImplicationChecksByTransitivity, 112.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=698occurred in iteration=17, InterpolantAutomatonStates: 396, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 30 MinimizatonAttempts, 1791 StatesRemovedByMinimization, 27 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 1.1s SatisfiabilityAnalysisTime, 28.2s InterpolantComputationTime, 1519 NumberOfCodeBlocks, 1519 NumberOfCodeBlocksAsserted, 50 NumberOfCheckSat, 1565 ConstructedInterpolants, 104 QuantifiedInterpolants, 23607 SizeOfPredicates, 126 NumberOfNonLiveVariables, 4626 ConjunctsInSsa, 460 ConjunctsInUnsatCore, 54 InterpolantComputations, 12 PerfectInterpolantSequences, 267/883 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: OVERALL_TIME: 2.2s, ICFG_INTERPRETER_ENTERED_PROCEDURES: 2, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 11, DAG_INTERPRETER_EARLY_EXITS: 0, TOOLS_POST_APPLICATIONS: 28, TOOLS_POST_TIME: 2.0s, TOOLS_POST_CALL_APPLICATIONS: 1, TOOLS_POST_CALL_TIME: 0.0s, TOOLS_POST_RETURN_APPLICATIONS: 0, TOOLS_POST_RETURN_TIME: 0.0s, TOOLS_QUANTIFIERELIM_APPLICATIONS: 29, TOOLS_QUANTIFIERELIM_TIME: 2.0s, TOOLS_QUANTIFIERELIM_MAX_TIME: 0.3s, FLUID_QUERY_TIME: 0.0s, FLUID_QUERIES: 48, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 2, DOMAIN_JOIN_TIME: 0.0s, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME: 0.0s, DOMAIN_WIDEN_APPLICATIONS: 1, DOMAIN_WIDEN_TIME: 0.1s, DOMAIN_ISSUBSETEQ_APPLICATIONS: 2, DOMAIN_ISSUBSETEQ_TIME: 0.0s, DOMAIN_ISBOTTOM_APPLICATIONS: 11, DOMAIN_ISBOTTOM_TIME: 0.0s, LOOP_SUMMARIZER_APPLICATIONS: 1, LOOP_SUMMARIZER_CACHE_MISSES: 1, LOOP_SUMMARIZER_OVERALL_TIME: 1.2s, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME: 1.2s, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 2, CALL_SUMMARIZER_APPLICATIONS: 0, CALL_SUMMARIZER_CACHE_MISSES: 0, CALL_SUMMARIZER_OVERALL_TIME: 0.0s, CALL_SUMMARIZER_NEW_COMPUTATION_TIME: 0.0s, 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: 104, DAG_COMPRESSION_RETAINED_NODES: 44, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2022-11-19 06:55:04,062 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/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-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-bftpd/bftpd_3.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6826aeecba49275836b6b398765a757158a4e84d2c6569399d77f2320562875e --- 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-8393723 [2022-11-19 06:55:06,412 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 06:55:06,414 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 06:55:06,446 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 06:55:06,451 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 06:55:06,452 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 06:55:06,455 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 06:55:06,462 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 06:55:06,464 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 06:55:06,466 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 06:55:06,467 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 06:55:06,469 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 06:55:06,471 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 06:55:06,474 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 06:55:06,476 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 06:55:06,478 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 06:55:06,481 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 06:55:06,487 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 06:55:06,489 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 06:55:06,492 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 06:55:06,501 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 06:55:06,508 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 06:55:06,509 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 06:55:06,510 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 06:55:06,513 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 06:55:06,514 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 06:55:06,514 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 06:55:06,515 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 06:55:06,516 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 06:55:06,519 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 06:55:06,520 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 06:55:06,521 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 06:55:06,522 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 06:55:06,524 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 06:55:06,527 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 06:55:06,528 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 06:55:06,529 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 06:55:06,529 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 06:55:06,530 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 06:55:06,531 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 06:55:06,532 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 06:55:06,533 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2022-11-19 06:55:06,583 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 06:55:06,584 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 06:55:06,584 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 06:55:06,584 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 06:55:06,585 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 06:55:06,585 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 06:55:06,585 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 06:55:06,586 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 06:55:06,586 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 06:55:06,586 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 06:55:06,586 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 06:55:06,586 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 06:55:06,587 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-19 06:55:06,587 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-19 06:55:06,587 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 06:55:06,588 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 06:55:06,588 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-19 06:55:06,588 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 06:55:06,588 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 06:55:06,588 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 06:55:06,588 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-19 06:55:06,589 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-19 06:55:06,591 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-19 06:55:06,592 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 06:55:06,592 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-19 06:55:06,592 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-19 06:55:06,593 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-19 06:55:06,593 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 06:55:06,594 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 06:55:06,594 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 06:55:06,594 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-19 06:55:06,594 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 06:55:06,595 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 06:55:06,595 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 06:55:06,595 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 06:55:06,596 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-19 06:55:06,597 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-19 06:55:06,597 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 06:55:06,597 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-19 06:55:06,597 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_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6826aeecba49275836b6b398765a757158a4e84d2c6569399d77f2320562875e [2022-11-19 06:55:06,953 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 06:55:06,987 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 06:55:06,990 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 06:55:06,991 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 06:55:06,992 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 06:55:06,994 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/memsafety-bftpd/bftpd_3.i [2022-11-19 06:55:07,066 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/data/8178764ff/406b91f14fbe44458b73af2e55c717bd/FLAG03c6cb07e [2022-11-19 06:55:07,760 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 06:55:07,761 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/sv-benchmarks/c/memsafety-bftpd/bftpd_3.i [2022-11-19 06:55:07,788 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/data/8178764ff/406b91f14fbe44458b73af2e55c717bd/FLAG03c6cb07e [2022-11-19 06:55:08,004 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/data/8178764ff/406b91f14fbe44458b73af2e55c717bd [2022-11-19 06:55:08,007 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 06:55:08,010 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 06:55:08,011 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 06:55:08,013 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 06:55:08,016 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 06:55:08,017 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 06:55:08" (1/1) ... [2022-11-19 06:55:08,019 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f5b38af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:55:08, skipping insertion in model container [2022-11-19 06:55:08,019 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 06:55:08" (1/1) ... [2022-11-19 06:55:08,027 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 06:55:08,079 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 06:55:08,487 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 06:55:08,507 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 06:55:08,578 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 06:55:08,623 INFO L208 MainTranslator]: Completed translation [2022-11-19 06:55:08,624 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:55:08 WrapperNode [2022-11-19 06:55:08,624 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 06:55:08,625 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 06:55:08,625 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 06:55:08,626 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 06:55:08,633 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:55:08" (1/1) ... [2022-11-19 06:55:08,664 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:55:08" (1/1) ... [2022-11-19 06:55:08,704 INFO L138 Inliner]: procedures = 169, calls = 42, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 96 [2022-11-19 06:55:08,704 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 06:55:08,706 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 06:55:08,706 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 06:55:08,706 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 06:55:08,716 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:55:08" (1/1) ... [2022-11-19 06:55:08,717 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:55:08" (1/1) ... [2022-11-19 06:55:08,733 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:55:08" (1/1) ... [2022-11-19 06:55:08,735 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:55:08" (1/1) ... [2022-11-19 06:55:08,743 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:55:08" (1/1) ... [2022-11-19 06:55:08,759 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:55:08" (1/1) ... [2022-11-19 06:55:08,761 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:55:08" (1/1) ... [2022-11-19 06:55:08,770 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:55:08" (1/1) ... [2022-11-19 06:55:08,773 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 06:55:08,774 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 06:55:08,782 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 06:55:08,783 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 06:55:08,784 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:55:08" (1/1) ... [2022-11-19 06:55:08,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 06:55:08,800 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:55:08,814 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 06:55:08,821 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 06:55:08,860 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2022-11-19 06:55:08,860 INFO L130 BoogieDeclarations]: Found specification of procedure parse_input [2022-11-19 06:55:08,861 INFO L138 BoogieDeclarations]: Found implementation of procedure parse_input [2022-11-19 06:55:08,862 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-19 06:55:08,863 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 06:55:08,863 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-19 06:55:08,863 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-19 06:55:08,863 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-19 06:55:08,863 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-19 06:55:08,864 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 06:55:08,864 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 06:55:09,069 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 06:55:09,071 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 06:55:09,453 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 06:55:09,460 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 06:55:09,461 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-19 06:55:09,463 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 06:55:09 BoogieIcfgContainer [2022-11-19 06:55:09,463 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 06:55:09,466 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 06:55:09,466 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 06:55:09,469 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 06:55:09,469 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 06:55:08" (1/3) ... [2022-11-19 06:55:09,470 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7abfc9bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 06:55:09, skipping insertion in model container [2022-11-19 06:55:09,470 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:55:08" (2/3) ... [2022-11-19 06:55:09,471 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7abfc9bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 06:55:09, skipping insertion in model container [2022-11-19 06:55:09,471 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 06:55:09" (3/3) ... [2022-11-19 06:55:09,473 INFO L112 eAbstractionObserver]: Analyzing ICFG bftpd_3.i [2022-11-19 06:55:09,493 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 06:55:09,493 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 20 error locations. [2022-11-19 06:55:09,561 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 06:55:09,569 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;@347fc773, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 06:55:09,570 INFO L358 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2022-11-19 06:55:09,574 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) [2022-11-19 06:55:09,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-19 06:55:09,583 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:55:09,584 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-19 06:55:09,585 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)] === [2022-11-19 06:55:09,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:55:09,591 INFO L85 PathProgramCache]: Analyzing trace with hash -772449407, now seen corresponding path program 1 times [2022-11-19 06:55:09,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 06:55:09,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1667272938] [2022-11-19 06:55:09,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:55:09,627 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 [2022-11-19 06:55:09,627 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 06:55:09,639 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 06:55:09,652 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 06:55:09,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:55:09,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-19 06:55:09,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:55:09,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:55:09,970 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 06:55:09,971 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 06:55:09,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1667272938] [2022-11-19 06:55:09,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1667272938] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:55:09,974 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:55:09,974 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 06:55:09,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143712534] [2022-11-19 06:55:09,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:55:09,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 06:55:09,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 06:55:10,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 06:55:10,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:55:10,029 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) [2022-11-19 06:55:10,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:55:10,274 INFO L93 Difference]: Finished difference Result 109 states and 127 transitions. [2022-11-19 06:55:10,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 06:55:10,278 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 [2022-11-19 06:55:10,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:55:10,299 INFO L225 Difference]: With dead ends: 109 [2022-11-19 06:55:10,299 INFO L226 Difference]: Without dead ends: 105 [2022-11-19 06:55:10,301 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 [2022-11-19 06:55:10,306 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 51 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 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, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 06:55:10,310 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 101 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 06:55:10,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-11-19 06:55:10,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 82. [2022-11-19 06:55:10,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 55 states have (on average 1.709090909090909) internal successors, (94), 74 states have internal predecessors, (94), 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) [2022-11-19 06:55:10,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 107 transitions. [2022-11-19 06:55:10,387 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 107 transitions. Word has length 6 [2022-11-19 06:55:10,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:55:10,388 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 107 transitions. [2022-11-19 06:55:10,388 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) [2022-11-19 06:55:10,389 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 107 transitions. [2022-11-19 06:55:10,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-19 06:55:10,390 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:55:10,390 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-19 06:55:10,412 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 06:55:10,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 06:55:10,606 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)] === [2022-11-19 06:55:10,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:55:10,607 INFO L85 PathProgramCache]: Analyzing trace with hash -772449406, now seen corresponding path program 1 times [2022-11-19 06:55:10,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 06:55:10,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1166773724] [2022-11-19 06:55:10,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:55:10,608 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 [2022-11-19 06:55:10,608 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 06:55:10,611 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 06:55:10,618 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 06:55:10,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:55:10,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-19 06:55:10,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:55:10,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:55:10,835 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 06:55:10,835 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 06:55:10,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1166773724] [2022-11-19 06:55:10,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1166773724] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:55:10,836 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:55:10,837 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 06:55:10,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008816357] [2022-11-19 06:55:10,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:55:10,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 06:55:10,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 06:55:10,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 06:55:10,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 06:55:10,851 INFO L87 Difference]: Start difference. First operand 82 states and 107 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) [2022-11-19 06:55:11,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:55:11,159 INFO L93 Difference]: Finished difference Result 207 states and 270 transitions. [2022-11-19 06:55:11,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 06:55:11,160 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 [2022-11-19 06:55:11,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:55:11,161 INFO L225 Difference]: With dead ends: 207 [2022-11-19 06:55:11,162 INFO L226 Difference]: Without dead ends: 207 [2022-11-19 06:55:11,162 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 [2022-11-19 06:55:11,163 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 144 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 06:55:11,163 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 147 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 06:55:11,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2022-11-19 06:55:11,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 149. [2022-11-19 06:55:11,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 117 states have (on average 1.7606837606837606) internal successors, (206), 136 states have internal predecessors, (206), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (18), 8 states have call predecessors, (18), 8 states have call successors, (18) [2022-11-19 06:55:11,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 232 transitions. [2022-11-19 06:55:11,182 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 232 transitions. Word has length 6 [2022-11-19 06:55:11,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:55:11,182 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 232 transitions. [2022-11-19 06:55:11,183 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) [2022-11-19 06:55:11,183 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 232 transitions. [2022-11-19 06:55:11,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-19 06:55:11,183 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:55:11,183 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:55:11,199 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 06:55:11,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 06:55:11,395 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-19 06:55:11,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:55:11,396 INFO L85 PathProgramCache]: Analyzing trace with hash 1823872140, now seen corresponding path program 1 times [2022-11-19 06:55:11,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 06:55:11,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1870871198] [2022-11-19 06:55:11,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:55:11,397 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 [2022-11-19 06:55:11,397 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 06:55:11,398 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 06:55:11,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 06:55:11,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:55:11,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-19 06:55:11,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:55:11,629 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 [2022-11-19 06:55:11,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:55:11,645 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 06:55:11,646 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 06:55:11,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1870871198] [2022-11-19 06:55:11,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1870871198] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:55:11,649 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:55:11,649 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 06:55:11,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826369531] [2022-11-19 06:55:11,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:55:11,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 06:55:11,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 06:55:11,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 06:55:11,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-19 06:55:11,654 INFO L87 Difference]: Start difference. First operand 149 states and 232 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) [2022-11-19 06:55:11,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:55:11,995 INFO L93 Difference]: Finished difference Result 228 states and 328 transitions. [2022-11-19 06:55:11,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 06:55:11,996 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 [2022-11-19 06:55:11,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:55:11,999 INFO L225 Difference]: With dead ends: 228 [2022-11-19 06:55:11,999 INFO L226 Difference]: Without dead ends: 228 [2022-11-19 06:55:11,999 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-19 06:55:12,000 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 134 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 165 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 [2022-11-19 06:55:12,000 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 165 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 06:55:12,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2022-11-19 06:55:12,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 152. [2022-11-19 06:55:12,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 120 states have (on average 1.7416666666666667) internal successors, (209), 139 states have internal predecessors, (209), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (18), 8 states have call predecessors, (18), 8 states have call successors, (18) [2022-11-19 06:55:12,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 235 transitions. [2022-11-19 06:55:12,046 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 235 transitions. Word has length 7 [2022-11-19 06:55:12,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:55:12,047 INFO L495 AbstractCegarLoop]: Abstraction has 152 states and 235 transitions. [2022-11-19 06:55:12,047 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) [2022-11-19 06:55:12,047 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 235 transitions. [2022-11-19 06:55:12,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-19 06:55:12,049 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:55:12,049 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:55:12,068 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 06:55:12,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 06:55:12,261 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)] === [2022-11-19 06:55:12,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:55:12,262 INFO L85 PathProgramCache]: Analyzing trace with hash 705461537, now seen corresponding path program 1 times [2022-11-19 06:55:12,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 06:55:12,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [728757680] [2022-11-19 06:55:12,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:55:12,263 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 [2022-11-19 06:55:12,263 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 06:55:12,269 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 06:55:12,274 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 06:55:12,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:55:12,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-19 06:55:12,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:55:12,494 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 [2022-11-19 06:55:12,499 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 [2022-11-19 06:55:12,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:55:12,530 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 06:55:12,530 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 06:55:12,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [728757680] [2022-11-19 06:55:12,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [728757680] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:55:12,531 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:55:12,531 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 06:55:12,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413775337] [2022-11-19 06:55:12,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:55:12,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 06:55:12,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 06:55:12,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 06:55:12,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-19 06:55:12,533 INFO L87 Difference]: Start difference. First operand 152 states and 235 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) [2022-11-19 06:55:12,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:55:12,829 INFO L93 Difference]: Finished difference Result 209 states and 271 transitions. [2022-11-19 06:55:12,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 06:55:12,830 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 [2022-11-19 06:55:12,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:55:12,831 INFO L225 Difference]: With dead ends: 209 [2022-11-19 06:55:12,832 INFO L226 Difference]: Without dead ends: 209 [2022-11-19 06:55:12,832 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 [2022-11-19 06:55:12,833 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 147 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 06:55:12,833 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 194 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 06:55:12,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2022-11-19 06:55:12,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 152. [2022-11-19 06:55:12,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 120 states have (on average 1.725) internal successors, (207), 139 states have internal predecessors, (207), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (18), 8 states have call predecessors, (18), 8 states have call successors, (18) [2022-11-19 06:55:12,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 233 transitions. [2022-11-19 06:55:12,849 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 233 transitions. Word has length 8 [2022-11-19 06:55:12,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:55:12,849 INFO L495 AbstractCegarLoop]: Abstraction has 152 states and 233 transitions. [2022-11-19 06:55:12,850 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) [2022-11-19 06:55:12,850 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 233 transitions. [2022-11-19 06:55:12,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-19 06:55:12,850 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:55:12,850 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:55:12,869 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-19 06:55:13,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 06:55:13,062 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)] === [2022-11-19 06:55:13,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:55:13,063 INFO L85 PathProgramCache]: Analyzing trace with hash 394471214, now seen corresponding path program 1 times [2022-11-19 06:55:13,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 06:55:13,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [13789718] [2022-11-19 06:55:13,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:55:13,064 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 06:55:13,064 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 06:55:13,065 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 06:55:13,070 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 06:55:13,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:55:13,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-19 06:55:13,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:55:13,215 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:55:13,215 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 06:55:13,215 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 06:55:13,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [13789718] [2022-11-19 06:55:13,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [13789718] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:55:13,216 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:55:13,216 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 06:55:13,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916442403] [2022-11-19 06:55:13,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:55:13,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 06:55:13,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 06:55:13,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 06:55:13,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 06:55:13,218 INFO L87 Difference]: Start difference. First operand 152 states and 233 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) [2022-11-19 06:55:13,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:55:13,391 INFO L93 Difference]: Finished difference Result 234 states and 323 transitions. [2022-11-19 06:55:13,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 06:55:13,392 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 [2022-11-19 06:55:13,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:55:13,393 INFO L225 Difference]: With dead ends: 234 [2022-11-19 06:55:13,393 INFO L226 Difference]: Without dead ends: 234 [2022-11-19 06:55:13,394 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 [2022-11-19 06:55:13,394 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 132 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 06:55:13,395 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 179 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 06:55:13,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2022-11-19 06:55:13,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 185. [2022-11-19 06:55:13,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 151 states have (on average 1.6754966887417218) internal successors, (253), 171 states have internal predecessors, (253), 8 states have call successors, (8), 5 states have call predecessors, (8), 6 states have return successors, (18), 8 states have call predecessors, (18), 8 states have call successors, (18) [2022-11-19 06:55:13,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 279 transitions. [2022-11-19 06:55:13,429 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 279 transitions. Word has length 9 [2022-11-19 06:55:13,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:55:13,429 INFO L495 AbstractCegarLoop]: Abstraction has 185 states and 279 transitions. [2022-11-19 06:55:13,430 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) [2022-11-19 06:55:13,430 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 279 transitions. [2022-11-19 06:55:13,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-19 06:55:13,430 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:55:13,431 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:55:13,444 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 06:55:13,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 06:55:13,632 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)] === [2022-11-19 06:55:13,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:55:13,632 INFO L85 PathProgramCache]: Analyzing trace with hash -656294205, now seen corresponding path program 1 times [2022-11-19 06:55:13,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 06:55:13,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [337579616] [2022-11-19 06:55:13,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:55:13,633 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 [2022-11-19 06:55:13,633 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 06:55:13,634 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 06:55:13,637 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 06:55:13,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:55:13,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-19 06:55:13,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:55:13,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:55:13,792 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 06:55:13,792 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 06:55:13,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [337579616] [2022-11-19 06:55:13,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [337579616] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:55:13,793 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:55:13,793 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 06:55:13,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125115528] [2022-11-19 06:55:13,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:55:13,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 06:55:13,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 06:55:13,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 06:55:13,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 06:55:13,795 INFO L87 Difference]: Start difference. First operand 185 states and 279 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) [2022-11-19 06:55:13,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:55:13,991 INFO L93 Difference]: Finished difference Result 235 states and 302 transitions. [2022-11-19 06:55:13,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 06:55:13,992 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 [2022-11-19 06:55:13,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:55:13,993 INFO L225 Difference]: With dead ends: 235 [2022-11-19 06:55:13,994 INFO L226 Difference]: Without dead ends: 235 [2022-11-19 06:55:13,994 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 [2022-11-19 06:55:13,995 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 141 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 06:55:13,995 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 207 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 06:55:13,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2022-11-19 06:55:14,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 199. [2022-11-19 06:55:14,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 164 states have (on average 1.670731707317073) internal successors, (274), 185 states have internal predecessors, (274), 8 states have call successors, (8), 5 states have call predecessors, (8), 7 states have return successors, (18), 8 states have call predecessors, (18), 8 states have call successors, (18) [2022-11-19 06:55:14,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 300 transitions. [2022-11-19 06:55:14,005 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 300 transitions. Word has length 10 [2022-11-19 06:55:14,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:55:14,005 INFO L495 AbstractCegarLoop]: Abstraction has 199 states and 300 transitions. [2022-11-19 06:55:14,006 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) [2022-11-19 06:55:14,006 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 300 transitions. [2022-11-19 06:55:14,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-19 06:55:14,006 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:55:14,007 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:55:14,023 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 06:55:14,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 06:55:14,219 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)] === [2022-11-19 06:55:14,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:55:14,219 INFO L85 PathProgramCache]: Analyzing trace with hash 12795785, now seen corresponding path program 1 times [2022-11-19 06:55:14,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 06:55:14,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1539566015] [2022-11-19 06:55:14,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:55:14,220 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 [2022-11-19 06:55:14,220 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 06:55:14,221 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 06:55:14,222 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 06:55:14,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:55:14,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-19 06:55:14,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:55:14,496 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:55:14,496 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:55:14,878 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:55:14,878 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 06:55:14,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1539566015] [2022-11-19 06:55:14,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1539566015] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:55:14,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [20657778] [2022-11-19 06:55:14,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:55:14,879 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 06:55:14,879 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 06:55:14,881 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 06:55:14,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2022-11-19 06:55:15,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:55:15,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-19 06:55:15,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:55:15,195 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:55:15,196 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:55:15,402 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:55:15,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [20657778] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:55:15,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958261407] [2022-11-19 06:55:15,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:55:15,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:55:15,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:55:15,408 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:55:15,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-19 06:55:15,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:55:15,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-19 06:55:15,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:55:15,627 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:55:15,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:55:15,819 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:55:15,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1958261407] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:55:15,820 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 06:55:15,820 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3, 3, 3, 3] total 6 [2022-11-19 06:55:15,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647637678] [2022-11-19 06:55:15,820 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 06:55:15,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-19 06:55:15,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 06:55:15,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-19 06:55:15,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-11-19 06:55:15,822 INFO L87 Difference]: Start difference. First operand 199 states and 300 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) [2022-11-19 06:55:16,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:55:16,447 INFO L93 Difference]: Finished difference Result 361 states and 483 transitions. [2022-11-19 06:55:16,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 06:55:16,448 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 [2022-11-19 06:55:16,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:55:16,450 INFO L225 Difference]: With dead ends: 361 [2022-11-19 06:55:16,450 INFO L226 Difference]: Without dead ends: 361 [2022-11-19 06:55:16,450 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-11-19 06:55:16,451 INFO L413 NwaCegarLoop]: 105 mSDtfsCounter, 372 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 372 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-19 06:55:16,451 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [372 Valid, 294 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-19 06:55:16,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2022-11-19 06:55:16,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 234. [2022-11-19 06:55:16,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 197 states have (on average 1.649746192893401) internal successors, (325), 220 states have internal predecessors, (325), 8 states have call successors, (8), 5 states have call predecessors, (8), 9 states have return successors, (21), 8 states have call predecessors, (21), 8 states have call successors, (21) [2022-11-19 06:55:16,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 354 transitions. [2022-11-19 06:55:16,463 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 354 transitions. Word has length 14 [2022-11-19 06:55:16,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:55:16,464 INFO L495 AbstractCegarLoop]: Abstraction has 234 states and 354 transitions. [2022-11-19 06:55:16,464 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) [2022-11-19 06:55:16,464 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 354 transitions. [2022-11-19 06:55:16,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-19 06:55:16,465 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:55:16,465 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:55:16,478 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (9)] Ended with exit code 0 [2022-11-19 06:55:16,674 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-19 06:55:16,872 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-19 06:55:17,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat -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_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:55:17,068 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)] === [2022-11-19 06:55:17,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:55:17,068 INFO L85 PathProgramCache]: Analyzing trace with hash 396669285, now seen corresponding path program 1 times [2022-11-19 06:55:17,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 06:55:17,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [171747392] [2022-11-19 06:55:17,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:55:17,069 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 [2022-11-19 06:55:17,069 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 06:55:17,070 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 06:55:17,075 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 06:55:17,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:55:17,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-19 06:55:17,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:55:17,367 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 [2022-11-19 06:55:17,383 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:55:17,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:55:17,562 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:55:17,562 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 06:55:17,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [171747392] [2022-11-19 06:55:17,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [171747392] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:55:17,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [161665402] [2022-11-19 06:55:17,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:55:17,563 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 06:55:17,563 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 06:55:17,564 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 06:55:17,594 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2022-11-19 06:55:17,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:55:17,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-19 06:55:17,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:55:18,044 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 [2022-11-19 06:55:18,073 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:55:18,074 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:55:18,171 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:55:18,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [161665402] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:55:18,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933604240] [2022-11-19 06:55:18,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:55:18,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:55:18,172 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:55:18,179 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:55:18,200 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-19 06:55:18,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:55:18,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-19 06:55:18,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:55:18,661 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 [2022-11-19 06:55:18,669 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:55:18,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:55:19,062 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:55:19,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1933604240] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:55:19,062 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 06:55:19,062 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 18 [2022-11-19 06:55:19,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104055721] [2022-11-19 06:55:19,063 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 06:55:19,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-19 06:55:19,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 06:55:19,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-19 06:55:19,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2022-11-19 06:55:19,064 INFO L87 Difference]: Start difference. First operand 234 states and 354 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) [2022-11-19 06:55:21,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:55:21,588 INFO L93 Difference]: Finished difference Result 590 states and 787 transitions. [2022-11-19 06:55:21,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-19 06:55:21,589 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 [2022-11-19 06:55:21,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:55:21,592 INFO L225 Difference]: With dead ends: 590 [2022-11-19 06:55:21,592 INFO L226 Difference]: Without dead ends: 590 [2022-11-19 06:55:21,592 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 [2022-11-19 06:55:21,593 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 1059 mSDsluCounter, 546 mSDsCounter, 0 mSdLazyCounter, 684 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1059 SdHoareTripleChecker+Valid, 633 SdHoareTripleChecker+Invalid, 786 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 684 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-19 06:55:21,593 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1059 Valid, 633 Invalid, 786 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 684 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-19 06:55:21,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2022-11-19 06:55:21,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 315. [2022-11-19 06:55:21,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 275 states have (on average 1.64) internal successors, (451), 301 states have internal predecessors, (451), 8 states have call successors, (8), 5 states have call predecessors, (8), 12 states have return successors, (27), 8 states have call predecessors, (27), 8 states have call successors, (27) [2022-11-19 06:55:21,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 486 transitions. [2022-11-19 06:55:21,625 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 486 transitions. Word has length 15 [2022-11-19 06:55:21,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:55:21,625 INFO L495 AbstractCegarLoop]: Abstraction has 315 states and 486 transitions. [2022-11-19 06:55:21,626 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) [2022-11-19 06:55:21,626 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 486 transitions. [2022-11-19 06:55:21,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-19 06:55:21,626 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:55:21,627 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:55:21,643 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 06:55:21,843 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (12)] Ended with exit code 0 [2022-11-19 06:55:22,043 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-11-19 06:55:22,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:55:22,238 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)] === [2022-11-19 06:55:22,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:55:22,239 INFO L85 PathProgramCache]: Analyzing trace with hash -588154008, now seen corresponding path program 1 times [2022-11-19 06:55:22,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 06:55:22,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [83498023] [2022-11-19 06:55:22,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:55:22,239 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 [2022-11-19 06:55:22,239 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 06:55:22,241 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 06:55:22,242 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 06:55:22,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:55:22,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-19 06:55:22,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:55:22,596 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 [2022-11-19 06:55:22,613 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 [2022-11-19 06:55:22,639 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:55:22,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:55:22,851 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:55:22,852 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 06:55:22,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [83498023] [2022-11-19 06:55:22,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [83498023] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:55:22,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [949825871] [2022-11-19 06:55:22,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:55:22,853 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 06:55:22,853 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 06:55:22,857 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 06:55:22,858 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2022-11-19 06:55:22,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:55:22,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-19 06:55:22,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:55:23,220 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 [2022-11-19 06:55:23,226 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 [2022-11-19 06:55:23,236 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:55:23,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:55:23,333 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:55:23,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [949825871] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:55:23,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191101631] [2022-11-19 06:55:23,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:55:23,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:55:23,334 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:55:23,337 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:55:23,340 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-19 06:55:23,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:55:23,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-19 06:55:23,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:55:23,900 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 [2022-11-19 06:55:23,907 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 [2022-11-19 06:55:23,961 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:55:23,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:55:24,379 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:55:24,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [191101631] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:55:24,379 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 06:55:24,380 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 15 [2022-11-19 06:55:24,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429752277] [2022-11-19 06:55:24,380 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 06:55:24,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-19 06:55:24,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 06:55:24,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-19 06:55:24,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2022-11-19 06:55:24,381 INFO L87 Difference]: Start difference. First operand 315 states and 486 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) [2022-11-19 06:55:27,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:55:27,357 INFO L93 Difference]: Finished difference Result 806 states and 1081 transitions. [2022-11-19 06:55:27,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-19 06:55:27,358 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 [2022-11-19 06:55:27,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:55:27,362 INFO L225 Difference]: With dead ends: 806 [2022-11-19 06:55:27,372 INFO L226 Difference]: Without dead ends: 806 [2022-11-19 06:55:27,372 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 [2022-11-19 06:55:27,373 INFO L413 NwaCegarLoop]: 112 mSDtfsCounter, 1114 mSDsluCounter, 611 mSDsCounter, 0 mSdLazyCounter, 509 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1114 SdHoareTripleChecker+Valid, 723 SdHoareTripleChecker+Invalid, 558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 509 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-19 06:55:27,373 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1114 Valid, 723 Invalid, 558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 509 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-11-19 06:55:27,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 806 states. [2022-11-19 06:55:27,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 806 to 396. [2022-11-19 06:55:27,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 352 states have (on average 1.6420454545454546) internal successors, (578), 380 states have internal predecessors, (578), 9 states have call successors, (9), 6 states have call predecessors, (9), 15 states have return successors, (32), 9 states have call predecessors, (32), 9 states have call successors, (32) [2022-11-19 06:55:27,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 619 transitions. [2022-11-19 06:55:27,393 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 619 transitions. Word has length 16 [2022-11-19 06:55:27,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:55:27,393 INFO L495 AbstractCegarLoop]: Abstraction has 396 states and 619 transitions. [2022-11-19 06:55:27,393 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) [2022-11-19 06:55:27,394 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 619 transitions. [2022-11-19 06:55:27,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-19 06:55:27,394 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:55:27,394 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:55:27,414 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 06:55:27,607 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2022-11-19 06:55:27,810 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-19 06:55:28,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:55:28,006 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)] === [2022-11-19 06:55:28,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:55:28,007 INFO L85 PathProgramCache]: Analyzing trace with hash -1776199734, now seen corresponding path program 1 times [2022-11-19 06:55:28,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 06:55:28,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [335696098] [2022-11-19 06:55:28,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:55:28,008 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 [2022-11-19 06:55:28,008 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 06:55:28,009 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 06:55:28,010 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 06:55:28,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:55:28,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-19 06:55:28,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:55:28,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:55:28,119 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 06:55:28,119 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 06:55:28,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [335696098] [2022-11-19 06:55:28,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [335696098] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:55:28,120 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:55:28,120 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 06:55:28,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825387631] [2022-11-19 06:55:28,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:55:28,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 06:55:28,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 06:55:28,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 06:55:28,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:55:28,122 INFO L87 Difference]: Start difference. First operand 396 states and 619 transitions. Second operand has 3 states, 2 states have (on average 8.5) 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) [2022-11-19 06:55:28,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:55:28,163 INFO L93 Difference]: Finished difference Result 545 states and 845 transitions. [2022-11-19 06:55:28,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 06:55:28,164 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 8.5) 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 [2022-11-19 06:55:28,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:55:28,167 INFO L225 Difference]: With dead ends: 545 [2022-11-19 06:55:28,167 INFO L226 Difference]: Without dead ends: 545 [2022-11-19 06:55:28,168 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 [2022-11-19 06:55:28,168 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 49 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 06:55:28,170 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 113 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 06:55:28,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2022-11-19 06:55:28,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 525. [2022-11-19 06:55:28,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 525 states, 470 states have (on average 1.6340425531914893) internal successors, (768), 502 states have internal predecessors, (768), 13 states have call successors, (13), 9 states have call predecessors, (13), 22 states have return successors, (56), 13 states have call predecessors, (56), 13 states have call successors, (56) [2022-11-19 06:55:28,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 837 transitions. [2022-11-19 06:55:28,194 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 837 transitions. Word has length 18 [2022-11-19 06:55:28,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:55:28,194 INFO L495 AbstractCegarLoop]: Abstraction has 525 states and 837 transitions. [2022-11-19 06:55:28,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 8.5) 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) [2022-11-19 06:55:28,194 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 837 transitions. [2022-11-19 06:55:28,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-19 06:55:28,195 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:55:28,195 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:55:28,212 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 06:55:28,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 06:55:28,407 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting parse_inputErr13ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-19 06:55:28,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:55:28,408 INFO L85 PathProgramCache]: Analyzing trace with hash -1776199478, now seen corresponding path program 1 times [2022-11-19 06:55:28,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 06:55:28,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [902308009] [2022-11-19 06:55:28,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:55:28,409 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 [2022-11-19 06:55:28,409 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 06:55:28,410 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 06:55:28,448 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 06:55:28,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:55:28,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-19 06:55:28,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:55:28,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:55:28,565 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 06:55:28,565 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 06:55:28,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [902308009] [2022-11-19 06:55:28,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [902308009] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:55:28,566 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:55:28,566 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 06:55:28,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952824648] [2022-11-19 06:55:28,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:55:28,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 06:55:28,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 06:55:28,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 06:55:28,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:55:28,568 INFO L87 Difference]: Start difference. First operand 525 states and 837 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) [2022-11-19 06:55:28,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:55:28,610 INFO L93 Difference]: Finished difference Result 577 states and 884 transitions. [2022-11-19 06:55:28,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 06:55:28,610 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 [2022-11-19 06:55:28,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:55:28,614 INFO L225 Difference]: With dead ends: 577 [2022-11-19 06:55:28,614 INFO L226 Difference]: Without dead ends: 577 [2022-11-19 06:55:28,615 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 [2022-11-19 06:55:28,615 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 34 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 06:55:28,615 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 114 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 06:55:28,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2022-11-19 06:55:28,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 559. [2022-11-19 06:55:28,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 559 states, 500 states have (on average 1.61) internal successors, (805), 534 states have internal predecessors, (805), 14 states have call successors, (14), 10 states have call predecessors, (14), 25 states have return successors, (59), 14 states have call predecessors, (59), 14 states have call successors, (59) [2022-11-19 06:55:28,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 559 states to 559 states and 878 transitions. [2022-11-19 06:55:28,639 INFO L78 Accepts]: Start accepts. Automaton has 559 states and 878 transitions. Word has length 18 [2022-11-19 06:55:28,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:55:28,640 INFO L495 AbstractCegarLoop]: Abstraction has 559 states and 878 transitions. [2022-11-19 06:55:28,640 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) [2022-11-19 06:55:28,640 INFO L276 IsEmpty]: Start isEmpty. Operand 559 states and 878 transitions. [2022-11-19 06:55:28,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-19 06:55:28,642 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:55:28,642 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:55:28,659 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 06:55:28,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 06:55:28,854 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting parse_inputErr11ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-19 06:55:28,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:55:28,854 INFO L85 PathProgramCache]: Analyzing trace with hash 772383166, now seen corresponding path program 1 times [2022-11-19 06:55:28,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 06:55:28,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [845808552] [2022-11-19 06:55:28,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:55:28,855 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 [2022-11-19 06:55:28,855 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 06:55:28,856 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 06:55:28,857 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat -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)] Waiting until timeout for monitored process [2022-11-19 06:55:28,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:55:28,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-19 06:55:28,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:55:29,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:55:29,029 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 06:55:29,029 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 06:55:29,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [845808552] [2022-11-19 06:55:29,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [845808552] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:55:29,030 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:55:29,030 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 06:55:29,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608191089] [2022-11-19 06:55:29,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:55:29,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 06:55:29,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 06:55:29,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 06:55:29,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:55:29,031 INFO L87 Difference]: Start difference. First operand 559 states and 878 transitions. Second operand has 3 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 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) [2022-11-19 06:55:29,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:55:29,086 INFO L93 Difference]: Finished difference Result 574 states and 877 transitions. [2022-11-19 06:55:29,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 06:55:29,087 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 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 19 [2022-11-19 06:55:29,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:55:29,090 INFO L225 Difference]: With dead ends: 574 [2022-11-19 06:55:29,090 INFO L226 Difference]: Without dead ends: 574 [2022-11-19 06:55:29,090 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:55:29,091 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 31 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 06:55:29,091 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 113 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 06:55:29,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2022-11-19 06:55:29,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 559. [2022-11-19 06:55:29,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 559 states, 500 states have (on average 1.6) internal successors, (800), 534 states have internal predecessors, (800), 14 states have call successors, (14), 10 states have call predecessors, (14), 25 states have return successors, (59), 14 states have call predecessors, (59), 14 states have call successors, (59) [2022-11-19 06:55:29,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 559 states to 559 states and 873 transitions. [2022-11-19 06:55:29,108 INFO L78 Accepts]: Start accepts. Automaton has 559 states and 873 transitions. Word has length 19 [2022-11-19 06:55:29,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:55:29,108 INFO L495 AbstractCegarLoop]: Abstraction has 559 states and 873 transitions. [2022-11-19 06:55:29,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 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) [2022-11-19 06:55:29,109 INFO L276 IsEmpty]: Start isEmpty. Operand 559 states and 873 transitions. [2022-11-19 06:55:29,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-19 06:55:29,109 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:55:29,110 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2022-11-19 06:55:29,126 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat -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)] Ended with exit code 0 [2022-11-19 06:55:29,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 06:55:29,321 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)] === [2022-11-19 06:55:29,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:55:29,321 INFO L85 PathProgramCache]: Analyzing trace with hash 323759248, now seen corresponding path program 2 times [2022-11-19 06:55:29,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 06:55:29,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1013353511] [2022-11-19 06:55:29,322 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 06:55:29,322 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 [2022-11-19 06:55:29,322 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 06:55:29,323 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 06:55:29,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-11-19 06:55:29,416 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 06:55:29,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 06:55:29,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-19 06:55:29,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:55:29,683 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:55:29,684 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:55:30,492 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:55:30,492 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 06:55:30,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1013353511] [2022-11-19 06:55:30,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1013353511] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:55:30,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [956544708] [2022-11-19 06:55:30,492 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 06:55:30,492 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 06:55:30,493 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 06:55:30,496 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 06:55:30,498 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2022-11-19 06:55:30,649 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 06:55:30,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 06:55:30,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-19 06:55:30,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:55:30,732 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:55:30,732 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:55:30,891 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:55:30,891 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [956544708] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:55:30,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324872894] [2022-11-19 06:55:30,892 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 06:55:30,892 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:55:30,892 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:55:30,893 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:55:30,895 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-19 06:55:30,966 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 06:55:30,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 06:55:30,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-19 06:55:30,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:55:31,002 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:55:31,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:55:31,049 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:55:31,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324872894] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:55:31,049 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 06:55:31,049 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 16 [2022-11-19 06:55:31,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195623984] [2022-11-19 06:55:31,050 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 06:55:31,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-19 06:55:31,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 06:55:31,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-19 06:55:31,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2022-11-19 06:55:31,051 INFO L87 Difference]: Start difference. First operand 559 states and 873 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) [2022-11-19 06:55:32,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:55:32,190 INFO L93 Difference]: Finished difference Result 640 states and 880 transitions. [2022-11-19 06:55:32,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-19 06:55:32,191 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 [2022-11-19 06:55:32,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:55:32,194 INFO L225 Difference]: With dead ends: 640 [2022-11-19 06:55:32,194 INFO L226 Difference]: Without dead ends: 640 [2022-11-19 06:55:32,195 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2022-11-19 06:55:32,195 INFO L413 NwaCegarLoop]: 122 mSDtfsCounter, 585 mSDsluCounter, 576 mSDsCounter, 0 mSdLazyCounter, 349 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 585 SdHoareTripleChecker+Valid, 698 SdHoareTripleChecker+Invalid, 377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-19 06:55:32,195 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [585 Valid, 698 Invalid, 377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 349 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-19 06:55:32,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 640 states. [2022-11-19 06:55:32,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 640 to 450. [2022-11-19 06:55:32,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 392 states have (on average 1.4974489795918366) internal successors, (587), 425 states have internal predecessors, (587), 14 states have call successors, (14), 10 states have call predecessors, (14), 24 states have return successors, (50), 14 states have call predecessors, (50), 14 states have call successors, (50) [2022-11-19 06:55:32,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 651 transitions. [2022-11-19 06:55:32,215 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 651 transitions. Word has length 22 [2022-11-19 06:55:32,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:55:32,216 INFO L495 AbstractCegarLoop]: Abstraction has 450 states and 651 transitions. [2022-11-19 06:55:32,217 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) [2022-11-19 06:55:32,217 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 651 transitions. [2022-11-19 06:55:32,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-19 06:55:32,219 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:55:32,219 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] [2022-11-19 06:55:32,231 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-11-19 06:55:32,435 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2022-11-19 06:55:32,638 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-19 06:55:32,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:55:32,834 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-19 06:55:32,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:55:32,834 INFO L85 PathProgramCache]: Analyzing trace with hash 1243788554, now seen corresponding path program 1 times [2022-11-19 06:55:32,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 06:55:32,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [285103032] [2022-11-19 06:55:32,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:55:32,835 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 [2022-11-19 06:55:32,835 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 06:55:32,837 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 06:55:32,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-11-19 06:55:32,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:55:32,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 06:55:32,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:55:32,930 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:55:32,931 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 06:55:32,931 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 06:55:32,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [285103032] [2022-11-19 06:55:32,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [285103032] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:55:32,931 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:55:32,931 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 06:55:32,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554455666] [2022-11-19 06:55:32,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:55:32,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 06:55:32,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 06:55:32,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 06:55:32,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:55:32,933 INFO L87 Difference]: Start difference. First operand 450 states and 651 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) [2022-11-19 06:55:32,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:55:32,940 INFO L93 Difference]: Finished difference Result 327 states and 456 transitions. [2022-11-19 06:55:32,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 06:55:32,941 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 [2022-11-19 06:55:32,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:55:32,942 INFO L225 Difference]: With dead ends: 327 [2022-11-19 06:55:32,943 INFO L226 Difference]: Without dead ends: 327 [2022-11-19 06:55:32,943 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 [2022-11-19 06:55:32,944 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 7 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 131 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 [2022-11-19 06:55:32,944 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 131 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 06:55:32,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2022-11-19 06:55:32,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 326. [2022-11-19 06:55:32,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 280 states have (on average 1.4785714285714286) internal successors, (414), 308 states have internal predecessors, (414), 10 states have call successors, (10), 7 states have call predecessors, (10), 16 states have return successors, (31), 10 states have call predecessors, (31), 10 states have call successors, (31) [2022-11-19 06:55:32,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 455 transitions. [2022-11-19 06:55:32,954 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 455 transitions. Word has length 25 [2022-11-19 06:55:32,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:55:32,954 INFO L495 AbstractCegarLoop]: Abstraction has 326 states and 455 transitions. [2022-11-19 06:55:32,954 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) [2022-11-19 06:55:32,954 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 455 transitions. [2022-11-19 06:55:32,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-19 06:55:32,955 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:55:32,955 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] [2022-11-19 06:55:32,967 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-11-19 06:55:33,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 06:55:33,167 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)] === [2022-11-19 06:55:33,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:55:33,167 INFO L85 PathProgramCache]: Analyzing trace with hash 1125506638, now seen corresponding path program 1 times [2022-11-19 06:55:33,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 06:55:33,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [667062246] [2022-11-19 06:55:33,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:55:33,168 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 [2022-11-19 06:55:33,168 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 06:55:33,169 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 06:55:33,195 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat -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)] Waiting until timeout for monitored process [2022-11-19 06:55:33,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:55:33,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-19 06:55:33,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:55:35,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:55:35,697 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 [2022-11-19 06:55:35,793 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:55:35,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:55:36,243 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 06:55:36,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [667062246] [2022-11-19 06:55:36,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [667062246] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:55:36,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2087073709] [2022-11-19 06:55:36,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:55:36,243 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 06:55:36,243 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 06:55:36,245 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 06:55:36,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2022-11-19 06:55:36,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:55:36,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-19 06:55:36,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:55:38,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:55:38,863 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 [2022-11-19 06:55:38,909 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:55:38,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:55:39,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2087073709] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:55:39,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745082762] [2022-11-19 06:55:39,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:55:39,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:55:39,172 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:55:39,175 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:55:39,199 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-19 06:55:39,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:55:39,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-19 06:55:39,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:55:41,559 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 06:55:41,560 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 [2022-11-19 06:55:42,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:55:42,123 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 [2022-11-19 06:55:42,169 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:55:42,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:55:42,332 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-11-19 06:55:42,332 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 [2022-11-19 06:55:45,228 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-11-19 06:55:45,228 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 [2022-11-19 06:55:47,449 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:55:47,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [745082762] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:55:47,449 INFO L184 FreeRefinementEngine]: Found 0 perfect and 4 imperfect interpolant sequences. [2022-11-19 06:55:47,449 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 4] total 12 [2022-11-19 06:55:47,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575776221] [2022-11-19 06:55:47,450 INFO L85 oduleStraightlineAll]: Using 4 imperfect interpolants to construct interpolant automaton [2022-11-19 06:55:47,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-19 06:55:47,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 06:55:47,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-19 06:55:47,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=152, Unknown=8, NotChecked=0, Total=210 [2022-11-19 06:55:47,451 INFO L87 Difference]: Start difference. First operand 326 states and 455 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) [2022-11-19 06:56:08,946 WARN L233 SmtUtils]: Spent 12.31s on a formula simplification. DAG size of input: 35 DAG size of output: 35 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 06:56:09,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:56:09,387 INFO L93 Difference]: Finished difference Result 499 states and 639 transitions. [2022-11-19 06:56:09,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-19 06:56:09,388 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 [2022-11-19 06:56:09,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:56:09,391 INFO L225 Difference]: With dead ends: 499 [2022-11-19 06:56:09,391 INFO L226 Difference]: Without dead ends: 499 [2022-11-19 06:56:09,392 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 97 SyntacticMatches, 6 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 32.7s TimeCoverageRelationStatistics Valid=184, Invalid=454, Unknown=12, NotChecked=0, Total=650 [2022-11-19 06:56:09,392 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 662 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 662 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 236 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-19 06:56:09,393 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [662 Valid, 279 Invalid, 447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 162 Invalid, 0 Unknown, 236 Unchecked, 0.6s Time] [2022-11-19 06:56:09,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2022-11-19 06:56:09,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 386. [2022-11-19 06:56:09,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 335 states have (on average 1.4358208955223881) internal successors, (481), 364 states have internal predecessors, (481), 12 states have call successors, (12), 9 states have call predecessors, (12), 19 states have return successors, (38), 12 states have call predecessors, (38), 12 states have call successors, (38) [2022-11-19 06:56:09,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 531 transitions. [2022-11-19 06:56:09,405 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 531 transitions. Word has length 27 [2022-11-19 06:56:09,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:56:09,406 INFO L495 AbstractCegarLoop]: Abstraction has 386 states and 531 transitions. [2022-11-19 06:56:09,406 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) [2022-11-19 06:56:09,406 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 531 transitions. [2022-11-19 06:56:09,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-19 06:56:09,407 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:56:09,407 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, 1] [2022-11-19 06:56:09,422 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-19 06:56:09,629 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-11-19 06:56:09,821 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (25)] Ended with exit code 0 [2022-11-19 06:56:10,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt [2022-11-19 06:56:10,019 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-19 06:56:10,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:56:10,020 INFO L85 PathProgramCache]: Analyzing trace with hash -1031478775, now seen corresponding path program 1 times [2022-11-19 06:56:10,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 06:56:10,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [376894292] [2022-11-19 06:56:10,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:56:10,020 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 [2022-11-19 06:56:10,020 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 06:56:10,021 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 06:56:10,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-11-19 06:56:10,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:56:10,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-19 06:56:10,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:56:10,380 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:56:10,380 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 06:56:10,380 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 06:56:10,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [376894292] [2022-11-19 06:56:10,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [376894292] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:56:10,380 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:56:10,380 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 06:56:10,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541919968] [2022-11-19 06:56:10,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:56:10,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 06:56:10,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 06:56:10,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 06:56:10,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-19 06:56:10,382 INFO L87 Difference]: Start difference. First operand 386 states and 531 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 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) [2022-11-19 06:56:10,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:56:10,713 INFO L93 Difference]: Finished difference Result 453 states and 595 transitions. [2022-11-19 06:56:10,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 06:56:10,713 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 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 28 [2022-11-19 06:56:10,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:56:10,716 INFO L225 Difference]: With dead ends: 453 [2022-11-19 06:56:10,716 INFO L226 Difference]: Without dead ends: 453 [2022-11-19 06:56:10,716 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-19 06:56:10,716 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 129 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 06:56:10,717 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 195 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 06:56:10,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2022-11-19 06:56:10,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 391. [2022-11-19 06:56:10,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 341 states have (on average 1.4310850439882699) internal successors, (488), 369 states have internal predecessors, (488), 12 states have call successors, (12), 9 states have call predecessors, (12), 18 states have return successors, (33), 12 states have call predecessors, (33), 12 states have call successors, (33) [2022-11-19 06:56:10,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 533 transitions. [2022-11-19 06:56:10,729 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 533 transitions. Word has length 28 [2022-11-19 06:56:10,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:56:10,730 INFO L495 AbstractCegarLoop]: Abstraction has 391 states and 533 transitions. [2022-11-19 06:56:10,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 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) [2022-11-19 06:56:10,730 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 533 transitions. [2022-11-19 06:56:10,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-19 06:56:10,731 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:56:10,731 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] [2022-11-19 06:56:10,747 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2022-11-19 06:56:10,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 06:56:10,942 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)] === [2022-11-19 06:56:10,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:56:10,943 INFO L85 PathProgramCache]: Analyzing trace with hash -719880979, now seen corresponding path program 1 times [2022-11-19 06:56:10,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 06:56:10,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1527510195] [2022-11-19 06:56:10,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:56:10,943 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 [2022-11-19 06:56:10,943 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 06:56:10,944 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 06:56:10,948 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 06:56:11,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:56:11,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-19 06:56:11,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:56:13,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:56:13,695 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 [2022-11-19 06:56:13,857 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 [2022-11-19 06:56:13,862 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 [2022-11-19 06:56:13,912 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:56:13,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:56:16,326 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 06:56:16,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1527510195] [2022-11-19 06:56:16,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1527510195] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:56:16,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1392305861] [2022-11-19 06:56:16,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:56:16,326 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 06:56:16,327 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 06:56:16,327 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 06:56:16,330 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2022-11-19 06:56:16,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:56:16,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-19 06:56:16,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:56:21,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:56:21,187 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 [2022-11-19 06:56:21,281 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 [2022-11-19 06:56:21,286 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 [2022-11-19 06:56:21,307 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:56:21,307 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:56:23,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1392305861] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:56:23,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123107901] [2022-11-19 06:56:23,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:56:23,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:56:23,573 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:56:23,574 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:56:23,577 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-11-19 06:56:23,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:56:23,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-19 06:56:23,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:56:26,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:56:26,247 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 [2022-11-19 06:56:26,326 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 [2022-11-19 06:56:26,330 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 [2022-11-19 06:56:26,348 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:56:26,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:56:28,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [123107901] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:56:28,613 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 06:56:28,614 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 7 [2022-11-19 06:56:28,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088781573] [2022-11-19 06:56:28,614 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 06:56:28,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-19 06:56:28,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 06:56:28,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-19 06:56:28,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=119, Unknown=5, NotChecked=0, Total=156 [2022-11-19 06:56:28,615 INFO L87 Difference]: Start difference. First operand 391 states and 533 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) [2022-11-19 06:56:35,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:56:35,603 INFO L93 Difference]: Finished difference Result 457 states and 583 transitions. [2022-11-19 06:56:35,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-19 06:56:35,604 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 [2022-11-19 06:56:35,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:56:35,606 INFO L225 Difference]: With dead ends: 457 [2022-11-19 06:56:35,607 INFO L226 Difference]: Without dead ends: 457 [2022-11-19 06:56:35,607 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 90 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 21.2s TimeCoverageRelationStatistics Valid=113, Invalid=299, Unknown=8, NotChecked=0, Total=420 [2022-11-19 06:56:35,608 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 176 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 60 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-19 06:56:35,608 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [176 Valid, 280 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 196 Invalid, 0 Unknown, 60 Unchecked, 0.6s Time] [2022-11-19 06:56:35,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2022-11-19 06:56:35,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 392. [2022-11-19 06:56:35,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 342 states have (on average 1.4239766081871346) internal successors, (487), 370 states have internal predecessors, (487), 12 states have call successors, (12), 9 states have call predecessors, (12), 18 states have return successors, (33), 12 states have call predecessors, (33), 12 states have call successors, (33) [2022-11-19 06:56:35,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 532 transitions. [2022-11-19 06:56:35,622 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 532 transitions. Word has length 29 [2022-11-19 06:56:35,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:56:35,622 INFO L495 AbstractCegarLoop]: Abstraction has 392 states and 532 transitions. [2022-11-19 06:56:35,623 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) [2022-11-19 06:56:35,623 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 532 transitions. [2022-11-19 06:56:35,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-19 06:56:35,624 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:56:35,624 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:56:35,636 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 06:56:35,838 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (29)] Ended with exit code 0 [2022-11-19 06:56:36,041 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-11-19 06:56:36,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat -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_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:56:36,237 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-19 06:56:36,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:56:36,237 INFO L85 PathProgramCache]: Analyzing trace with hash -253201523, now seen corresponding path program 1 times [2022-11-19 06:56:36,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 06:56:36,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1260890674] [2022-11-19 06:56:36,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:56:36,238 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 [2022-11-19 06:56:36,238 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 06:56:36,239 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 06:56:36,240 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2022-11-19 06:56:36,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:56:36,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-19 06:56:36,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:56:36,498 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-19 06:56:36,499 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:56:36,754 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-19 06:56:36,754 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 06:56:36,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1260890674] [2022-11-19 06:56:36,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1260890674] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:56:36,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1525494541] [2022-11-19 06:56:36,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:56:36,755 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 06:56:36,755 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 06:56:36,759 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 06:56:36,779 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (32)] Waiting until timeout for monitored process [2022-11-19 06:56:36,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:56:36,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-19 06:56:36,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:56:37,056 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-19 06:56:37,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:56:37,271 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-19 06:56:37,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1525494541] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:56:37,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210186117] [2022-11-19 06:56:37,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:56:37,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:56:37,272 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:56:37,275 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:56:37,280 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-11-19 06:56:37,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:56:37,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-19 06:56:37,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:56:37,482 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-19 06:56:37,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:56:37,691 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-19 06:56:37,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210186117] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:56:37,691 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 06:56:37,692 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 7 [2022-11-19 06:56:37,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826612331] [2022-11-19 06:56:37,692 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 06:56:37,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-19 06:56:37,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 06:56:37,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-19 06:56:37,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-11-19 06:56:37,693 INFO L87 Difference]: Start difference. First operand 392 states and 532 transitions. Second operand has 9 states, 8 states have (on average 4.5) internal successors, (36), 6 states have internal predecessors, (36), 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) [2022-11-19 06:56:38,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:56:38,271 INFO L93 Difference]: Finished difference Result 521 states and 656 transitions. [2022-11-19 06:56:38,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-19 06:56:38,272 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.5) internal successors, (36), 6 states have internal predecessors, (36), 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 30 [2022-11-19 06:56:38,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:56:38,274 INFO L225 Difference]: With dead ends: 521 [2022-11-19 06:56:38,274 INFO L226 Difference]: Without dead ends: 521 [2022-11-19 06:56:38,275 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2022-11-19 06:56:38,275 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 334 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 334 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 06:56:38,276 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [334 Valid, 231 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-19 06:56:38,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2022-11-19 06:56:38,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 462. [2022-11-19 06:56:38,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 462 states, 410 states have (on average 1.3780487804878048) internal successors, (565), 438 states have internal predecessors, (565), 12 states have call successors, (12), 11 states have call predecessors, (12), 20 states have return successors, (31), 12 states have call predecessors, (31), 12 states have call successors, (31) [2022-11-19 06:56:38,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 462 states to 462 states and 608 transitions. [2022-11-19 06:56:38,303 INFO L78 Accepts]: Start accepts. Automaton has 462 states and 608 transitions. Word has length 30 [2022-11-19 06:56:38,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:56:38,306 INFO L495 AbstractCegarLoop]: Abstraction has 462 states and 608 transitions. [2022-11-19 06:56:38,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.5) internal successors, (36), 6 states have internal predecessors, (36), 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) [2022-11-19 06:56:38,307 INFO L276 IsEmpty]: Start isEmpty. Operand 462 states and 608 transitions. [2022-11-19 06:56:38,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-19 06:56:38,308 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:56:38,308 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:56:38,315 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-11-19 06:56:38,516 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (32)] Ended with exit code 0 [2022-11-19 06:56:38,722 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Ended with exit code 0 [2022-11-19 06:56:38,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 06:56:38,915 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting parse_inputErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-19 06:56:38,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:56:38,915 INFO L85 PathProgramCache]: Analyzing trace with hash 740687428, now seen corresponding path program 1 times [2022-11-19 06:56:38,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 06:56:38,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1668061594] [2022-11-19 06:56:38,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:56:38,916 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 [2022-11-19 06:56:38,916 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 06:56:38,917 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 06:56:38,918 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2022-11-19 06:56:38,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:56:38,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-19 06:56:38,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:56:39,197 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-19 06:56:39,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:56:39,501 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-19 06:56:39,502 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 06:56:39,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1668061594] [2022-11-19 06:56:39,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1668061594] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:56:39,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [583642695] [2022-11-19 06:56:39,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:56:39,503 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 06:56:39,503 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 06:56:39,504 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 06:56:39,505 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (35)] Waiting until timeout for monitored process [2022-11-19 06:56:39,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:56:39,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-19 06:56:39,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:56:39,817 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-19 06:56:39,817 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:56:40,028 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-19 06:56:40,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [583642695] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:56:40,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661933107] [2022-11-19 06:56:40,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:56:40,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:56:40,029 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:56:40,030 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:56:40,033 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-11-19 06:56:40,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:56:40,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-19 06:56:40,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:56:40,272 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-19 06:56:40,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:56:40,481 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-19 06:56:40,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1661933107] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:56:40,481 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 06:56:40,481 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 8 [2022-11-19 06:56:40,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910931565] [2022-11-19 06:56:40,482 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 06:56:40,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-19 06:56:40,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 06:56:40,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-19 06:56:40,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-11-19 06:56:40,484 INFO L87 Difference]: Start difference. First operand 462 states and 608 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) [2022-11-19 06:56:41,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:56:41,298 INFO L93 Difference]: Finished difference Result 563 states and 688 transitions. [2022-11-19 06:56:41,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-19 06:56:41,299 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 [2022-11-19 06:56:41,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:56:41,301 INFO L225 Difference]: With dead ends: 563 [2022-11-19 06:56:41,302 INFO L226 Difference]: Without dead ends: 563 [2022-11-19 06:56:41,302 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 [2022-11-19 06:56:41,302 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 474 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 474 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 06:56:41,303 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [474 Valid, 325 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-19 06:56:41,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2022-11-19 06:56:41,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 521. [2022-11-19 06:56:41,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 521 states, 467 states have (on average 1.3490364025695931) internal successors, (630), 496 states have internal predecessors, (630), 12 states have call successors, (12), 12 states have call predecessors, (12), 22 states have return successors, (26), 12 states have call predecessors, (26), 12 states have call successors, (26) [2022-11-19 06:56:41,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 521 states to 521 states and 668 transitions. [2022-11-19 06:56:41,324 INFO L78 Accepts]: Start accepts. Automaton has 521 states and 668 transitions. Word has length 31 [2022-11-19 06:56:41,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:56:41,324 INFO L495 AbstractCegarLoop]: Abstraction has 521 states and 668 transitions. [2022-11-19 06:56:41,324 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) [2022-11-19 06:56:41,325 INFO L276 IsEmpty]: Start isEmpty. Operand 521 states and 668 transitions. [2022-11-19 06:56:41,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-19 06:56:41,329 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:56:41,329 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, 1, 1, 1] [2022-11-19 06:56:41,331 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (35)] Forceful destruction successful, exit code 0 [2022-11-19 06:56:41,538 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (34)] Ended with exit code 0 [2022-11-19 06:56:41,735 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2022-11-19 06:56:41,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:56:41,932 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-19 06:56:41,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:56:41,932 INFO L85 PathProgramCache]: Analyzing trace with hash 1567291088, now seen corresponding path program 1 times [2022-11-19 06:56:41,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 06:56:41,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [36194933] [2022-11-19 06:56:41,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:56:41,932 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 [2022-11-19 06:56:41,933 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 06:56:41,933 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 06:56:41,935 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat -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)] Waiting until timeout for monitored process [2022-11-19 06:56:42,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:56:42,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-19 06:56:42,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:56:42,836 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 19 treesize of output 11 [2022-11-19 06:56:42,841 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:56:42,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:56:43,681 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:56:43,681 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 06:56:43,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [36194933] [2022-11-19 06:56:43,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [36194933] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:56:43,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [599063769] [2022-11-19 06:56:43,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:56:43,682 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 06:56:43,682 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 06:56:43,683 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 06:56:43,685 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (38)] Waiting until timeout for monitored process [2022-11-19 06:56:43,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:56:43,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-19 06:56:43,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:56:44,454 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 0 case distinctions, treesize of input 21 treesize of output 32 [2022-11-19 06:56:44,567 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-19 06:56:44,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:56:44,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [599063769] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:56:44,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797981858] [2022-11-19 06:56:44,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:56:44,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:56:44,785 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:56:44,786 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:56:44,789 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-11-19 06:56:44,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:56:44,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-19 06:56:44,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:56:46,557 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 19 treesize of output 11 [2022-11-19 06:56:46,562 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:56:46,562 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:56:48,818 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:56:48,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797981858] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:56:48,819 INFO L184 FreeRefinementEngine]: Found 0 perfect and 5 imperfect interpolant sequences. [2022-11-19 06:56:48,819 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 4, 8, 8] total 31 [2022-11-19 06:56:48,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185676838] [2022-11-19 06:56:48,819 INFO L85 oduleStraightlineAll]: Using 5 imperfect interpolants to construct interpolant automaton [2022-11-19 06:56:48,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-19 06:56:48,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 06:56:48,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-19 06:56:48,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=949, Unknown=0, NotChecked=0, Total=1122 [2022-11-19 06:56:48,821 INFO L87 Difference]: Start difference. First operand 521 states and 668 transitions. Second operand has 32 states, 32 states have (on average 4.6875) internal successors, (150), 27 states have internal predecessors, (150), 7 states have call successors, (7), 7 states have call predecessors, (7), 5 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-19 06:56:57,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:56:57,103 INFO L93 Difference]: Finished difference Result 443 states and 531 transitions. [2022-11-19 06:56:57,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-19 06:56:57,105 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 4.6875) internal successors, (150), 27 states have internal predecessors, (150), 7 states have call successors, (7), 7 states have call predecessors, (7), 5 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) Word has length 36 [2022-11-19 06:56:57,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:56:57,107 INFO L225 Difference]: With dead ends: 443 [2022-11-19 06:56:57,107 INFO L226 Difference]: Without dead ends: 443 [2022-11-19 06:56:57,108 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 946 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=624, Invalid=2682, Unknown=0, NotChecked=0, Total=3306 [2022-11-19 06:56:57,109 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 1061 mSDsluCounter, 416 mSDsCounter, 0 mSdLazyCounter, 780 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1061 SdHoareTripleChecker+Valid, 463 SdHoareTripleChecker+Invalid, 924 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 780 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 76 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-11-19 06:56:57,109 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1061 Valid, 463 Invalid, 924 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 780 Invalid, 0 Unknown, 76 Unchecked, 3.1s Time] [2022-11-19 06:56:57,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2022-11-19 06:56:57,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 362. [2022-11-19 06:56:57,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 322 states have (on average 1.3633540372670807) internal successors, (439), 345 states have internal predecessors, (439), 8 states have call successors, (8), 8 states have call predecessors, (8), 14 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) [2022-11-19 06:56:57,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 463 transitions. [2022-11-19 06:56:57,119 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 463 transitions. Word has length 36 [2022-11-19 06:56:57,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:56:57,119 INFO L495 AbstractCegarLoop]: Abstraction has 362 states and 463 transitions. [2022-11-19 06:56:57,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 4.6875) internal successors, (150), 27 states have internal predecessors, (150), 7 states have call successors, (7), 7 states have call predecessors, (7), 5 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-19 06:56:57,120 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 463 transitions. [2022-11-19 06:56:57,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-19 06:56:57,121 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:56:57,121 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] [2022-11-19 06:56:57,133 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat -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)] Ended with exit code 0 [2022-11-19 06:56:57,335 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2022-11-19 06:56:57,533 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (38)] Ended with exit code 0 [2022-11-19 06:56:57,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt [2022-11-19 06:56:57,731 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting parse_inputErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-19 06:56:57,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:56:57,732 INFO L85 PathProgramCache]: Analyzing trace with hash -948350694, now seen corresponding path program 1 times [2022-11-19 06:56:57,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 06:56:57,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1018563344] [2022-11-19 06:56:57,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:56:57,732 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 [2022-11-19 06:56:57,733 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 06:56:57,733 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 06:56:57,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat -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)] Waiting until timeout for monitored process [2022-11-19 06:56:57,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:56:57,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-19 06:56:57,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:57:00,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:00,294 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 [2022-11-19 06:57:00,644 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:57:00,644 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:57:01,630 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 06:57:01,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1018563344] [2022-11-19 06:57:01,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1018563344] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:57:01,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2055653644] [2022-11-19 06:57:01,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:57:01,630 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 06:57:01,630 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 06:57:01,631 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 06:57:01,634 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (41)] Waiting until timeout for monitored process [2022-11-19 06:57:01,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:57:01,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-19 06:57:01,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:57:04,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:04,299 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 [2022-11-19 06:57:04,558 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:57:04,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:57:07,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2055653644] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:57:07,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926519630] [2022-11-19 06:57:07,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:57:07,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:57:07,244 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:57:07,245 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:57:07,247 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-11-19 06:57:07,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:57:07,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-19 06:57:07,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:57:09,653 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 06:57:09,654 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 [2022-11-19 06:57:10,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:10,138 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 [2022-11-19 06:57:10,427 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:57:10,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:57:10,933 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-11-19 06:57:10,933 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 [2022-11-19 06:57:15,766 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-11-19 06:57:15,766 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 [2022-11-19 06:57:17,947 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:57:17,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1926519630] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:57:17,947 INFO L184 FreeRefinementEngine]: Found 0 perfect and 4 imperfect interpolant sequences. [2022-11-19 06:57:17,948 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 5] total 14 [2022-11-19 06:57:17,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557033808] [2022-11-19 06:57:17,948 INFO L85 oduleStraightlineAll]: Using 4 imperfect interpolants to construct interpolant automaton [2022-11-19 06:57:17,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-19 06:57:17,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 06:57:17,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-19 06:57:17,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=202, Unknown=11, NotChecked=0, Total=272 [2022-11-19 06:57:17,949 INFO L87 Difference]: Start difference. First operand 362 states and 463 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) [2022-11-19 06:57:32,943 WARN L233 SmtUtils]: Spent 6.09s on a formula simplification that was a NOOP. DAG size: 26 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 06:57:37,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:57:37,173 INFO L93 Difference]: Finished difference Result 411 states and 496 transitions. [2022-11-19 06:57:37,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-19 06:57:37,175 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 [2022-11-19 06:57:37,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:57:37,176 INFO L225 Difference]: With dead ends: 411 [2022-11-19 06:57:37,177 INFO L226 Difference]: Without dead ends: 411 [2022-11-19 06:57:37,177 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 181 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 34.4s TimeCoverageRelationStatistics Valid=164, Invalid=469, Unknown=17, NotChecked=0, Total=650 [2022-11-19 06:57:37,178 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 435 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 435 SdHoareTripleChecker+Valid, 350 SdHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 183 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 06:57:37,178 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [435 Valid, 350 Invalid, 351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 140 Invalid, 0 Unknown, 183 Unchecked, 0.5s Time] [2022-11-19 06:57:37,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2022-11-19 06:57:37,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 362. [2022-11-19 06:57:37,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 322 states have (on average 1.34472049689441) internal successors, (433), 345 states have internal predecessors, (433), 8 states have call successors, (8), 8 states have call predecessors, (8), 14 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) [2022-11-19 06:57:37,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 457 transitions. [2022-11-19 06:57:37,188 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 457 transitions. Word has length 41 [2022-11-19 06:57:37,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:57:37,189 INFO L495 AbstractCegarLoop]: Abstraction has 362 states and 457 transitions. [2022-11-19 06:57:37,189 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) [2022-11-19 06:57:37,189 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 457 transitions. [2022-11-19 06:57:37,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-19 06:57:37,190 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:57:37,190 INFO L195 NwaCegarLoop]: trace histogram [4, 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, 1, 1, 1, 1] [2022-11-19 06:57:37,199 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-11-19 06:57:37,404 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-19 06:57:37,598 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (41)] Ended with exit code 0 [2022-11-19 06:57:37,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt [2022-11-19 06:57:37,797 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-19 06:57:37,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:57:37,797 INFO L85 PathProgramCache]: Analyzing trace with hash 1419217069, now seen corresponding path program 1 times [2022-11-19 06:57:37,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 06:57:37,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [56860076] [2022-11-19 06:57:37,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:57:37,798 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 [2022-11-19 06:57:37,798 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 06:57:37,799 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 06:57:37,800 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2022-11-19 06:57:37,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:57:37,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-19 06:57:37,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:57:40,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:40,793 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 [2022-11-19 06:57:40,903 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-19 06:57:40,903 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:57:41,502 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 06:57:41,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [56860076] [2022-11-19 06:57:41,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [56860076] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:57:41,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1037604976] [2022-11-19 06:57:41,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:57:41,503 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 06:57:41,503 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 06:57:41,505 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 06:57:41,523 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (44)] Waiting until timeout for monitored process [2022-11-19 06:57:41,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:57:41,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-19 06:57:41,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:57:44,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:44,559 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 [2022-11-19 06:57:44,611 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-19 06:57:44,611 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:57:44,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1037604976] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:57:44,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657455188] [2022-11-19 06:57:44,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:57:44,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:57:44,929 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:57:44,929 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:57:44,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-11-19 06:57:45,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:57:45,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-19 06:57:45,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:57:49,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:57:49,913 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 [2022-11-19 06:57:49,983 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-19 06:57:49,984 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:57:50,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657455188] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:57:50,299 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 06:57:50,299 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 7] total 8 [2022-11-19 06:57:50,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249147373] [2022-11-19 06:57:50,299 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 06:57:50,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-19 06:57:50,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 06:57:50,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-19 06:57:50,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=116, Unknown=4, NotChecked=0, Total=156 [2022-11-19 06:57:50,301 INFO L87 Difference]: Start difference. First operand 362 states and 457 transitions. Second operand has 10 states, 9 states have (on average 5.0) internal successors, (45), 9 states have internal predecessors, (45), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-11-19 06:57:57,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:57:57,408 INFO L93 Difference]: Finished difference Result 409 states and 483 transitions. [2022-11-19 06:57:57,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-19 06:57:57,409 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 5.0) internal successors, (45), 9 states have internal predecessors, (45), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 48 [2022-11-19 06:57:57,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:57:57,411 INFO L225 Difference]: With dead ends: 409 [2022-11-19 06:57:57,411 INFO L226 Difference]: Without dead ends: 409 [2022-11-19 06:57:57,412 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 140 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 15.6s TimeCoverageRelationStatistics Valid=144, Invalid=355, Unknown=7, NotChecked=0, Total=506 [2022-11-19 06:57:57,412 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 338 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 338 SdHoareTripleChecker+Valid, 417 SdHoareTripleChecker+Invalid, 301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 68 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-19 06:57:57,413 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [338 Valid, 417 Invalid, 301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 212 Invalid, 0 Unknown, 68 Unchecked, 0.6s Time] [2022-11-19 06:57:57,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2022-11-19 06:57:57,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 366. [2022-11-19 06:57:57,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 327 states have (on average 1.3363914373088686) internal successors, (437), 349 states have internal predecessors, (437), 8 states have call successors, (8), 8 states have call predecessors, (8), 13 states have return successors, (14), 8 states have call predecessors, (14), 8 states have call successors, (14) [2022-11-19 06:57:57,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 459 transitions. [2022-11-19 06:57:57,424 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 459 transitions. Word has length 48 [2022-11-19 06:57:57,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:57:57,425 INFO L495 AbstractCegarLoop]: Abstraction has 366 states and 459 transitions. [2022-11-19 06:57:57,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 5.0) internal successors, (45), 9 states have internal predecessors, (45), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-11-19 06:57:57,425 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 459 transitions. [2022-11-19 06:57:57,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-19 06:57:57,426 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:57:57,426 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] [2022-11-19 06:57:57,435 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (44)] Forceful destruction successful, exit code 0 [2022-11-19 06:57:57,640 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-11-19 06:57:57,843 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (43)] Ended with exit code 0 [2022-11-19 06:57:58,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 06:57:58,036 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)] === [2022-11-19 06:57:58,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:57:58,036 INFO L85 PathProgramCache]: Analyzing trace with hash -2005037539, now seen corresponding path program 1 times [2022-11-19 06:57:58,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 06:57:58,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1851363880] [2022-11-19 06:57:58,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:57:58,037 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 [2022-11-19 06:57:58,037 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 06:57:58,038 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 06:57:58,050 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2022-11-19 06:57:58,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:57:58,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-19 06:57:58,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:57:58,269 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-19 06:57:58,270 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 06:57:58,270 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 06:57:58,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1851363880] [2022-11-19 06:57:58,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1851363880] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:57:58,271 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:57:58,271 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 06:57:58,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918115672] [2022-11-19 06:57:58,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:57:58,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 06:57:58,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 06:57:58,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 06:57:58,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 06:57:58,273 INFO L87 Difference]: Start difference. First operand 366 states and 459 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, (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) [2022-11-19 06:57:58,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:57:58,317 INFO L93 Difference]: Finished difference Result 377 states and 464 transitions. [2022-11-19 06:57:58,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 06:57:58,318 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, (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 47 [2022-11-19 06:57:58,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:57:58,320 INFO L225 Difference]: With dead ends: 377 [2022-11-19 06:57:58,320 INFO L226 Difference]: Without dead ends: 377 [2022-11-19 06:57:58,320 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 06:57:58,321 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 44 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 06:57:58,321 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 113 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 06:57:58,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2022-11-19 06:57:58,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 360. [2022-11-19 06:57:58,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 323 states have (on average 1.306501547987616) internal successors, (422), 343 states have internal predecessors, (422), 8 states have call successors, (8), 8 states have call predecessors, (8), 13 states have return successors, (14), 8 states have call predecessors, (14), 8 states have call successors, (14) [2022-11-19 06:57:58,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 444 transitions. [2022-11-19 06:57:58,331 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 444 transitions. Word has length 47 [2022-11-19 06:57:58,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:57:58,332 INFO L495 AbstractCegarLoop]: Abstraction has 360 states and 444 transitions. [2022-11-19 06:57:58,332 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, (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) [2022-11-19 06:57:58,332 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 444 transitions. [2022-11-19 06:57:58,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-19 06:57:58,333 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:57:58,333 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] [2022-11-19 06:57:58,346 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (46)] Forceful destruction successful, exit code 0 [2022-11-19 06:57:58,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 06:57:58,546 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting parse_inputErr13ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-19 06:57:58,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:57:58,550 INFO L85 PathProgramCache]: Analyzing trace with hash -2005037283, now seen corresponding path program 1 times [2022-11-19 06:57:58,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 06:57:58,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2104254021] [2022-11-19 06:57:58,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:57:58,551 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 [2022-11-19 06:57:58,551 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 06:57:58,552 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 06:57:58,589 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat -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)] Waiting until timeout for monitored process [2022-11-19 06:57:58,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:57:58,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 06:57:58,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:57:58,673 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-19 06:57:58,673 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 06:57:58,673 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 06:57:58,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2104254021] [2022-11-19 06:57:58,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2104254021] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:57:58,673 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:57:58,674 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 06:57:58,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481743415] [2022-11-19 06:57:58,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:57:58,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 06:57:58,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 06:57:58,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 06:57:58,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:57:58,675 INFO L87 Difference]: Start difference. First operand 360 states and 444 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) [2022-11-19 06:57:58,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:57:58,683 INFO L93 Difference]: Finished difference Result 340 states and 403 transitions. [2022-11-19 06:57:58,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 06:57:58,683 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 [2022-11-19 06:57:58,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:57:58,685 INFO L225 Difference]: With dead ends: 340 [2022-11-19 06:57:58,685 INFO L226 Difference]: Without dead ends: 340 [2022-11-19 06:57:58,685 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 [2022-11-19 06:57:58,686 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 9 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 97 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 [2022-11-19 06:57:58,687 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 97 Invalid, 1 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 06:57:58,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2022-11-19 06:57:58,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 328. [2022-11-19 06:57:58,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 297 states have (on average 1.2491582491582491) internal successors, (371), 311 states have internal predecessors, (371), 8 states have call successors, (8), 8 states have call predecessors, (8), 12 states have return successors, (12), 8 states have call predecessors, (12), 8 states have call successors, (12) [2022-11-19 06:57:58,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 391 transitions. [2022-11-19 06:57:58,696 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 391 transitions. Word has length 47 [2022-11-19 06:57:58,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:57:58,696 INFO L495 AbstractCegarLoop]: Abstraction has 328 states and 391 transitions. [2022-11-19 06:57:58,697 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) [2022-11-19 06:57:58,697 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 391 transitions. [2022-11-19 06:57:58,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-19 06:57:58,697 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:57:58,698 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] [2022-11-19 06:57:58,711 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-19 06:57:58,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 06:57:58,911 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-19 06:57:58,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:57:58,911 INFO L85 PathProgramCache]: Analyzing trace with hash -120223612, now seen corresponding path program 1 times [2022-11-19 06:57:58,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 06:57:58,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2140757126] [2022-11-19 06:57:58,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:57:58,912 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 [2022-11-19 06:57:58,912 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 06:57:58,913 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 06:57:58,948 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 06:57:59,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:57:59,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-19 06:57:59,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:58:01,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:01,654 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 [2022-11-19 06:58:03,948 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 06:58:03,948 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 [2022-11-19 06:58:04,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:04,457 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 [2022-11-19 06:58:04,556 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:58:04,556 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:58:04,910 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-11-19 06:58:04,910 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 [2022-11-19 06:58:07,616 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-11-19 06:58:07,616 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 [2022-11-19 06:58:10,371 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 06:58:10,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2140757126] [2022-11-19 06:58:10,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2140757126] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:58:10,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2001547665] [2022-11-19 06:58:10,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:58:10,372 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 06:58:10,372 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 06:58:10,373 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 06:58:10,374 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (49)] Waiting until timeout for monitored process [2022-11-19 06:58:10,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:58:10,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-19 06:58:10,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:58:13,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:13,070 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 [2022-11-19 06:58:13,322 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 06:58:13,323 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 [2022-11-19 06:58:13,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:13,757 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 [2022-11-19 06:58:13,811 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:58:13,811 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:58:13,993 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-11-19 06:58:13,993 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 [2022-11-19 06:58:16,788 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-11-19 06:58:16,789 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 [2022-11-19 06:58:17,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2001547665] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:58:17,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316271974] [2022-11-19 06:58:17,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:58:17,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:58:17,528 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:58:17,533 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:58:17,534 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-11-19 06:58:17,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:58:17,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-19 06:58:17,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:58:17,904 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 06:58:17,904 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 [2022-11-19 06:58:18,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:18,297 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 [2022-11-19 06:58:18,530 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 06:58:18,531 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 [2022-11-19 06:58:19,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:19,010 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 [2022-11-19 06:58:19,068 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-19 06:58:19,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:58:19,264 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-11-19 06:58:19,264 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 [2022-11-19 06:58:22,115 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-11-19 06:58:22,115 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 [2022-11-19 06:58:22,481 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-11-19 06:58:22,481 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 [2022-11-19 06:58:25,298 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-11-19 06:58:25,299 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 [2022-11-19 06:58:25,520 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-19 06:58:25,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [316271974] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:58:25,520 INFO L184 FreeRefinementEngine]: Found 0 perfect and 4 imperfect interpolant sequences. [2022-11-19 06:58:25,521 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 5, 4] total 12 [2022-11-19 06:58:25,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80846919] [2022-11-19 06:58:25,521 INFO L85 oduleStraightlineAll]: Using 4 imperfect interpolants to construct interpolant automaton [2022-11-19 06:58:25,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-19 06:58:25,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 06:58:25,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-19 06:58:25,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=169, Unknown=8, NotChecked=0, Total=240 [2022-11-19 06:58:25,523 INFO L87 Difference]: Start difference. First operand 328 states and 391 transitions. Second operand has 14 states, 13 states have (on average 6.230769230769231) internal successors, (81), 13 states have internal predecessors, (81), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-11-19 06:58:32,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:58:32,627 INFO L93 Difference]: Finished difference Result 392 states and 452 transitions. [2022-11-19 06:58:32,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-19 06:58:32,627 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 6.230769230769231) internal successors, (81), 13 states have internal predecessors, (81), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 48 [2022-11-19 06:58:32,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:58:32,629 INFO L225 Difference]: With dead ends: 392 [2022-11-19 06:58:32,630 INFO L226 Difference]: Without dead ends: 392 [2022-11-19 06:58:32,630 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 210 SyntacticMatches, 16 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 26.7s TimeCoverageRelationStatistics Valid=171, Invalid=370, Unknown=11, NotChecked=0, Total=552 [2022-11-19 06:58:32,631 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 244 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 79 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 06:58:32,631 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [244 Valid, 112 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 113 Invalid, 0 Unknown, 79 Unchecked, 0.4s Time] [2022-11-19 06:58:32,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2022-11-19 06:58:32,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 327. [2022-11-19 06:58:32,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 297 states have (on average 1.2323232323232323) internal successors, (366), 310 states have internal predecessors, (366), 8 states have call successors, (8), 8 states have call predecessors, (8), 12 states have return successors, (12), 8 states have call predecessors, (12), 8 states have call successors, (12) [2022-11-19 06:58:32,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 386 transitions. [2022-11-19 06:58:32,641 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 386 transitions. Word has length 48 [2022-11-19 06:58:32,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:58:32,642 INFO L495 AbstractCegarLoop]: Abstraction has 327 states and 386 transitions. [2022-11-19 06:58:32,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 6.230769230769231) internal successors, (81), 13 states have internal predecessors, (81), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-11-19 06:58:32,642 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 386 transitions. [2022-11-19 06:58:32,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-19 06:58:32,643 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:58:32,643 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, 1] [2022-11-19 06:58:32,651 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (49)] Forceful destruction successful, exit code 0 [2022-11-19 06:58:32,855 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 06:58:33,053 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-11-19 06:58:33,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat -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_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:58:33,248 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting parse_inputErr11ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-19 06:58:33,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:58:33,249 INFO L85 PathProgramCache]: Analyzing trace with hash -2026621493, now seen corresponding path program 1 times [2022-11-19 06:58:33,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 06:58:33,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2111503080] [2022-11-19 06:58:33,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:58:33,249 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 [2022-11-19 06:58:33,249 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 06:58:33,250 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 06:58:33,252 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (51)] Waiting until timeout for monitored process [2022-11-19 06:58:33,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:58:33,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-19 06:58:33,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:58:33,789 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-19 06:58:33,789 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 06:58:33,789 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 06:58:33,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2111503080] [2022-11-19 06:58:33,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2111503080] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:58:33,790 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:58:33,790 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 06:58:33,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135876881] [2022-11-19 06:58:33,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:58:33,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 06:58:33,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 06:58:33,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 06:58:33,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 06:58:33,791 INFO L87 Difference]: Start difference. First operand 327 states and 386 transitions. Second operand has 5 states, 4 states have (on average 9.75) 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) [2022-11-19 06:58:33,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:58:33,951 INFO L93 Difference]: Finished difference Result 345 states and 392 transitions. [2022-11-19 06:58:33,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 06:58:33,952 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 9.75) 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 48 [2022-11-19 06:58:33,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:58:33,954 INFO L225 Difference]: With dead ends: 345 [2022-11-19 06:58:33,954 INFO L226 Difference]: Without dead ends: 345 [2022-11-19 06:58:33,954 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-11-19 06:58:33,955 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 56 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 06:58:33,955 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 144 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 06:58:33,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2022-11-19 06:58:33,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 326. [2022-11-19 06:58:33,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 297 states have (on average 1.1986531986531987) internal successors, (356), 309 states have internal predecessors, (356), 8 states have call successors, (8), 8 states have call predecessors, (8), 12 states have return successors, (12), 8 states have call predecessors, (12), 8 states have call successors, (12) [2022-11-19 06:58:33,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 376 transitions. [2022-11-19 06:58:33,964 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 376 transitions. Word has length 48 [2022-11-19 06:58:33,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:58:33,965 INFO L495 AbstractCegarLoop]: Abstraction has 326 states and 376 transitions. [2022-11-19 06:58:33,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 9.75) 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) [2022-11-19 06:58:33,965 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 376 transitions. [2022-11-19 06:58:33,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-19 06:58:33,966 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:58:33,966 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:58:33,983 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (51)] Forceful destruction successful, exit code 0 [2022-11-19 06:58:34,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 06:58:34,179 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-19 06:58:34,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:58:34,179 INFO L85 PathProgramCache]: Analyzing trace with hash -1931998324, now seen corresponding path program 1 times [2022-11-19 06:58:34,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 06:58:34,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1412124422] [2022-11-19 06:58:34,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:58:34,179 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 [2022-11-19 06:58:34,180 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 06:58:34,180 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 06:58:34,181 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 06:58:34,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:58:34,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-19 06:58:34,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:58:37,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:37,490 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 [2022-11-19 06:58:37,657 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 [2022-11-19 06:58:37,661 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 [2022-11-19 06:58:37,714 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-19 06:58:37,714 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:58:40,107 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 06:58:40,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1412124422] [2022-11-19 06:58:40,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1412124422] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:58:40,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [35447997] [2022-11-19 06:58:40,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:58:40,108 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 06:58:40,108 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 06:58:40,109 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 06:58:40,111 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (53)] Waiting until timeout for monitored process [2022-11-19 06:58:40,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:58:40,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-19 06:58:40,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:58:45,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:45,555 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 [2022-11-19 06:58:45,655 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 [2022-11-19 06:58:45,664 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 [2022-11-19 06:58:45,681 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 5 proven. 17 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-19 06:58:45,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:58:47,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [35447997] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:58:47,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051397815] [2022-11-19 06:58:47,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:58:47,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:58:47,982 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:58:47,983 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:58:47,985 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-11-19 06:58:48,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:58:48,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-19 06:58:48,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:58:51,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:58:51,182 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 [2022-11-19 06:58:51,290 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 [2022-11-19 06:58:51,294 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 [2022-11-19 06:58:51,314 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-19 06:58:51,314 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:58:53,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2051397815] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:58:53,583 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 06:58:53,583 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 7 [2022-11-19 06:58:53,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060270019] [2022-11-19 06:58:53,584 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 06:58:53,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-19 06:58:53,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 06:58:53,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-19 06:58:53,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=119, Unknown=5, NotChecked=0, Total=156 [2022-11-19 06:58:53,586 INFO L87 Difference]: Start difference. First operand 326 states and 376 transitions. Second operand has 9 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 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) [2022-11-19 06:59:00,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:59:00,534 INFO L93 Difference]: Finished difference Result 351 states and 393 transitions. [2022-11-19 06:59:00,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-19 06:59:00,535 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 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 50 [2022-11-19 06:59:00,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:59:00,536 INFO L225 Difference]: With dead ends: 351 [2022-11-19 06:59:00,537 INFO L226 Difference]: Without dead ends: 351 [2022-11-19 06:59:00,537 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 153 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 21.3s TimeCoverageRelationStatistics Valid=113, Invalid=299, Unknown=8, NotChecked=0, Total=420 [2022-11-19 06:59:00,538 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 126 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 06:59:00,538 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 214 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 154 Invalid, 0 Unknown, 44 Unchecked, 0.5s Time] [2022-11-19 06:59:00,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2022-11-19 06:59:00,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 326. [2022-11-19 06:59:00,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 297 states have (on average 1.1952861952861953) internal successors, (355), 309 states have internal predecessors, (355), 8 states have call successors, (8), 8 states have call predecessors, (8), 12 states have return successors, (12), 8 states have call predecessors, (12), 8 states have call successors, (12) [2022-11-19 06:59:00,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 375 transitions. [2022-11-19 06:59:00,547 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 375 transitions. Word has length 50 [2022-11-19 06:59:00,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:59:00,548 INFO L495 AbstractCegarLoop]: Abstraction has 326 states and 375 transitions. [2022-11-19 06:59:00,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 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) [2022-11-19 06:59:00,548 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 375 transitions. [2022-11-19 06:59:00,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-19 06:59:00,549 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:59:00,549 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, 1, 1] [2022-11-19 06:59:00,559 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (53)] Forceful destruction successful, exit code 0 [2022-11-19 06:59:00,760 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 06:59:00,957 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-11-19 06:59:01,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:59:01,153 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting parse_inputErr12ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-19 06:59:01,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:59:01,154 INFO L85 PathProgramCache]: Analyzing trace with hash 1599243231, now seen corresponding path program 1 times [2022-11-19 06:59:01,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 06:59:01,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1451928199] [2022-11-19 06:59:01,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:59:01,154 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 [2022-11-19 06:59:01,154 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 06:59:01,155 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 06:59:01,156 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 06:59:01,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:59:01,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-19 06:59:01,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:59:01,258 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 [2022-11-19 06:59:01,442 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-19 06:59:01,442 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 06:59:01,443 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 06:59:01,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1451928199] [2022-11-19 06:59:01,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1451928199] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:59:01,451 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:59:01,451 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 06:59:01,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309630437] [2022-11-19 06:59:01,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:59:01,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 06:59:01,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 06:59:01,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 06:59:01,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 06:59:01,452 INFO L87 Difference]: Start difference. First operand 326 states and 375 transitions. Second operand has 4 states, 3 states have (on average 13.333333333333334) internal successors, (40), 4 states have internal predecessors, (40), 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) [2022-11-19 06:59:01,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:59:01,668 INFO L93 Difference]: Finished difference Result 351 states and 393 transitions. [2022-11-19 06:59:01,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 06:59:01,669 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 13.333333333333334) internal successors, (40), 4 states have internal predecessors, (40), 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 49 [2022-11-19 06:59:01,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:59:01,671 INFO L225 Difference]: With dead ends: 351 [2022-11-19 06:59:01,671 INFO L226 Difference]: Without dead ends: 351 [2022-11-19 06:59:01,671 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 06:59:01,672 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 20 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 06:59:01,672 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 132 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 06:59:01,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2022-11-19 06:59:01,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 326. [2022-11-19 06:59:01,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 297 states have (on average 1.1818181818181819) internal successors, (351), 309 states have internal predecessors, (351), 8 states have call successors, (8), 8 states have call predecessors, (8), 12 states have return successors, (12), 8 states have call predecessors, (12), 8 states have call successors, (12) [2022-11-19 06:59:01,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 371 transitions. [2022-11-19 06:59:01,681 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 371 transitions. Word has length 49 [2022-11-19 06:59:01,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:59:01,682 INFO L495 AbstractCegarLoop]: Abstraction has 326 states and 371 transitions. [2022-11-19 06:59:01,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 13.333333333333334) internal successors, (40), 4 states have internal predecessors, (40), 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) [2022-11-19 06:59:01,682 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 371 transitions. [2022-11-19 06:59:01,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-19 06:59:01,683 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:59:01,683 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2022-11-19 06:59:01,699 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat -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 [2022-11-19 06:59:01,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 06:59:01,896 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)] === [2022-11-19 06:59:01,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:59:01,896 INFO L85 PathProgramCache]: Analyzing trace with hash 429224355, now seen corresponding path program 1 times [2022-11-19 06:59:01,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 06:59:01,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1250885715] [2022-11-19 06:59:01,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:59:01,897 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 [2022-11-19 06:59:01,897 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 06:59:01,898 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 06:59:01,899 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (56)] Waiting until timeout for monitored process [2022-11-19 06:59:02,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:59:02,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-19 06:59:02,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:59:04,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:04,728 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 [2022-11-19 06:59:11,371 INFO L321 Elim1Store]: treesize reduction 6, result has 57.1 percent of original size [2022-11-19 06:59:11,371 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 17 treesize of output 17 [2022-11-19 06:59:12,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:12,415 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 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 [2022-11-19 06:59:12,593 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 [2022-11-19 06:59:12,605 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 [2022-11-19 06:59:12,689 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:59:12,689 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:59:13,168 INFO L321 Elim1Store]: treesize reduction 7, result has 50.0 percent of original size [2022-11-19 06:59:13,169 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 19 treesize of output 18 [2022-11-19 06:59:16,028 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-11-19 06:59:16,029 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 15 treesize of output 14 [2022-11-19 06:59:18,832 WARN L837 $PredicateComparison]: unable to prove that (forall ((|v_parse_input_c1_~x~0#1.base_81| (_ BitVec 32)) (v_ArrVal_157 (_ BitVec 32))) (or (not (= (_ bv0 1) (select |c_#valid| |v_parse_input_c1_~x~0#1.base_81|))) (bvult (select (select |c_#memory_$Pointer$.offset| |c_~#commands~0.base|) |c_~#commands~0.offset|) (select (store |c_#length| |v_parse_input_c1_~x~0#1.base_81| v_ArrVal_157) (select (select |c_#memory_$Pointer$.base| |c_~#commands~0.base|) |c_~#commands~0.offset|))))) is different from false [2022-11-19 06:59:18,837 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 06:59:18,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1250885715] [2022-11-19 06:59:18,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1250885715] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:59:18,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [944769681] [2022-11-19 06:59:18,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:59:18,837 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 06:59:18,838 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 06:59:18,838 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 06:59:18,840 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (57)] Waiting until timeout for monitored process [2022-11-19 06:59:19,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:59:19,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-19 06:59:19,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:59:23,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:23,854 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 [2022-11-19 06:59:24,221 INFO L321 Elim1Store]: treesize reduction 6, result has 57.1 percent of original size [2022-11-19 06:59:24,221 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 17 [2022-11-19 06:59:25,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:59:25,032 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 [2022-11-19 06:59:25,140 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 [2022-11-19 06:59:25,145 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 [2022-11-19 06:59:25,168 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:59:25,168 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:59:25,397 INFO L321 Elim1Store]: treesize reduction 7, result has 50.0 percent of original size [2022-11-19 06:59:25,398 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 19 treesize of output 18 [2022-11-19 06:59:30,105 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-11-19 06:59:30,105 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 [2022-11-19 06:59:39,222 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [944769681] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:59:39,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676809441] [2022-11-19 06:59:39,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:59:39,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:59:39,223 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:59:39,224 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:59:39,227 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-11-19 06:59:39,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:59:39,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-19 06:59:39,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:59:40,311 INFO L321 Elim1Store]: treesize reduction 6, result has 57.1 percent of original size [2022-11-19 06:59:40,311 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 17 [2022-11-19 06:59:40,319 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 17 treesize of output 19 [2022-11-19 06:59:40,719 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 18 treesize of output 10 [2022-11-19 06:59:40,723 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 [2022-11-19 06:59:40,812 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 25 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 06:59:40,812 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:59:41,077 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:59:41,081 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2022-11-19 06:59:41,087 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 12 treesize of output 8 [2022-11-19 06:59:45,637 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 06:59:45,637 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 43 treesize of output 47 [2022-11-19 06:59:45,939 INFO L321 Elim1Store]: treesize reduction 7, result has 82.1 percent of original size [2022-11-19 06:59:45,940 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 55 [2022-11-19 06:59:46,079 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-11-19 06:59:46,080 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 9 [2022-11-19 06:59:46,206 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 25 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 06:59:46,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [676809441] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:59:46,207 INFO L184 FreeRefinementEngine]: Found 0 perfect and 4 imperfect interpolant sequences. [2022-11-19 06:59:46,207 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 8, 10] total 31 [2022-11-19 06:59:46,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109452440] [2022-11-19 06:59:46,207 INFO L85 oduleStraightlineAll]: Using 4 imperfect interpolants to construct interpolant automaton [2022-11-19 06:59:46,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-19 06:59:46,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 06:59:46,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-19 06:59:46,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=1318, Unknown=23, NotChecked=76, Total=1640 [2022-11-19 06:59:46,209 INFO L87 Difference]: Start difference. First operand 326 states and 371 transitions. Second operand has 32 states, 31 states have (on average 4.67741935483871) internal successors, (145), 29 states have internal predecessors, (145), 6 states have call successors, (9), 7 states have call predecessors, (9), 7 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-19 06:59:56,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:59:56,227 INFO L93 Difference]: Finished difference Result 390 states and 431 transitions. [2022-11-19 06:59:56,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-19 06:59:56,228 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 4.67741935483871) internal successors, (145), 29 states have internal predecessors, (145), 6 states have call successors, (9), 7 states have call predecessors, (9), 7 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) Word has length 50 [2022-11-19 06:59:56,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:59:56,229 INFO L225 Difference]: With dead ends: 390 [2022-11-19 06:59:56,229 INFO L226 Difference]: Without dead ends: 390 [2022-11-19 06:59:56,231 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 220 SyntacticMatches, 5 SemanticMatches, 49 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 809 ImplicationChecksByTransitivity, 46.9s TimeCoverageRelationStatistics Valid=475, Invalid=1952, Unknown=27, NotChecked=96, Total=2550 [2022-11-19 06:59:56,231 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 378 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 378 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 137 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-19 06:59:56,231 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [378 Valid, 244 Invalid, 430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 253 Invalid, 0 Unknown, 137 Unchecked, 0.8s Time] [2022-11-19 06:59:56,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2022-11-19 06:59:56,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 326. [2022-11-19 06:59:56,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 297 states have (on average 1.1784511784511784) internal successors, (350), 309 states have internal predecessors, (350), 8 states have call successors, (8), 8 states have call predecessors, (8), 12 states have return successors, (12), 8 states have call predecessors, (12), 8 states have call successors, (12) [2022-11-19 06:59:56,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 370 transitions. [2022-11-19 06:59:56,248 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 370 transitions. Word has length 50 [2022-11-19 06:59:56,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:59:56,250 INFO L495 AbstractCegarLoop]: Abstraction has 326 states and 370 transitions. [2022-11-19 06:59:56,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 4.67741935483871) internal successors, (145), 29 states have internal predecessors, (145), 6 states have call successors, (9), 7 states have call predecessors, (9), 7 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-19 06:59:56,251 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 370 transitions. [2022-11-19 06:59:56,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-19 06:59:56,255 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:59:56,255 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:59:56,265 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (57)] Forceful destruction successful, exit code 0 [2022-11-19 06:59:56,464 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2022-11-19 06:59:56,668 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (56)] Ended with exit code 0 [2022-11-19 06:59:56,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 06:59:56,860 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)] === [2022-11-19 06:59:56,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:59:56,861 INFO L85 PathProgramCache]: Analyzing trace with hash 825866446, now seen corresponding path program 1 times [2022-11-19 06:59:56,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 06:59:56,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1566311703] [2022-11-19 06:59:56,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:59:56,861 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 [2022-11-19 06:59:56,861 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 06:59:56,862 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 06:59:56,863 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat -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)] Waiting until timeout for monitored process [2022-11-19 06:59:57,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:59:57,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-19 06:59:57,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:59:57,307 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-19 06:59:57,307 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:59:57,896 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-19 06:59:57,896 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 06:59:57,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1566311703] [2022-11-19 06:59:57,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1566311703] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:59:57,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [149900699] [2022-11-19 06:59:57,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:59:57,897 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 06:59:57,897 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 06:59:57,898 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 06:59:57,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (60)] Waiting until timeout for monitored process [2022-11-19 06:59:58,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:59:58,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-19 06:59:58,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:59:58,665 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-19 06:59:58,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:59:59,265 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-19 06:59:59,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [149900699] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:59:59,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314041540] [2022-11-19 06:59:59,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:59:59,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:59:59,266 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:59:59,271 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:59:59,288 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-11-19 06:59:59,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:59:59,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-19 06:59:59,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:59:59,618 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-19 06:59:59,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:00:00,091 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-19 07:00:00,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1314041540] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:00:00,092 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 07:00:00,092 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 10 [2022-11-19 07:00:00,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335490868] [2022-11-19 07:00:00,092 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 07:00:00,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-19 07:00:00,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:00:00,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-19 07:00:00,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-11-19 07:00:00,094 INFO L87 Difference]: Start difference. First operand 326 states and 370 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) [2022-11-19 07:00:00,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:00:00,965 INFO L93 Difference]: Finished difference Result 353 states and 390 transitions. [2022-11-19 07:00:00,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-19 07:00:00,967 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 [2022-11-19 07:00:00,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:00:00,969 INFO L225 Difference]: With dead ends: 353 [2022-11-19 07:00:00,969 INFO L226 Difference]: Without dead ends: 353 [2022-11-19 07:00:00,969 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 [2022-11-19 07:00:00,970 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 305 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 07:00:00,970 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [305 Valid, 232 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-19 07:00:00,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2022-11-19 07:00:00,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 326. [2022-11-19 07:00:00,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 297 states have (on average 1.164983164983165) internal successors, (346), 309 states have internal predecessors, (346), 8 states have call successors, (8), 8 states have call predecessors, (8), 12 states have return successors, (12), 8 states have call predecessors, (12), 8 states have call successors, (12) [2022-11-19 07:00:00,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 366 transitions. [2022-11-19 07:00:00,979 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 366 transitions. Word has length 51 [2022-11-19 07:00:00,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:00:00,979 INFO L495 AbstractCegarLoop]: Abstraction has 326 states and 366 transitions. [2022-11-19 07:00:00,979 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) [2022-11-19 07:00:00,980 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 366 transitions. [2022-11-19 07:00:00,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-19 07:00:00,980 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:00:00,981 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:00:00,993 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat -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)] Forceful destruction successful, exit code 0 [2022-11-19 07:00:01,197 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2022-11-19 07:00:01,395 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (60)] Ended with exit code 0 [2022-11-19 07:00:01,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt [2022-11-19 07:00:01,593 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting parse_inputErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-19 07:00:01,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:00:01,593 INFO L85 PathProgramCache]: Analyzing trace with hash -167943901, now seen corresponding path program 1 times [2022-11-19 07:00:01,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:00:01,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1309878600] [2022-11-19 07:00:01,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:00:01,594 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 [2022-11-19 07:00:01,594 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:00:01,595 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 07:00:01,596 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat -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)] Waiting until timeout for monitored process [2022-11-19 07:00:01,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:00:01,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-19 07:00:01,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:00:02,108 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-19 07:00:02,108 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:00:02,710 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-19 07:00:02,710 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:00:02,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1309878600] [2022-11-19 07:00:02,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1309878600] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:00:02,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1460457597] [2022-11-19 07:00:02,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:00:02,711 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:00:02,711 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:00:02,712 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:00:02,715 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (63)] Waiting until timeout for monitored process [2022-11-19 07:00:02,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:00:02,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-19 07:00:02,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:00:03,216 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-19 07:00:03,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:00:03,704 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-19 07:00:03,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1460457597] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:00:03,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866835528] [2022-11-19 07:00:03,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:00:03,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:00:03,705 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:00:03,705 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:00:03,708 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-11-19 07:00:03,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:00:03,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-19 07:00:03,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:00:04,091 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-19 07:00:04,091 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:00:04,550 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-19 07:00:04,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1866835528] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:00:04,550 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 07:00:04,550 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 8 [2022-11-19 07:00:04,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793247853] [2022-11-19 07:00:04,551 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 07:00:04,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-19 07:00:04,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:00:04,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-19 07:00:04,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-11-19 07:00:04,552 INFO L87 Difference]: Start difference. First operand 326 states and 366 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) [2022-11-19 07:00:05,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:00:05,385 INFO L93 Difference]: Finished difference Result 342 states and 377 transitions. [2022-11-19 07:00:05,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-19 07:00:05,386 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 [2022-11-19 07:00:05,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:00:05,387 INFO L225 Difference]: With dead ends: 342 [2022-11-19 07:00:05,387 INFO L226 Difference]: Without dead ends: 342 [2022-11-19 07:00:05,387 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 [2022-11-19 07:00:05,388 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 218 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 07:00:05,388 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [218 Valid, 226 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-19 07:00:05,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2022-11-19 07:00:05,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 325. [2022-11-19 07:00:05,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 297 states have (on average 1.1481481481481481) internal successors, (341), 308 states have internal predecessors, (341), 8 states have call successors, (8), 8 states have call predecessors, (8), 12 states have return successors, (12), 8 states have call predecessors, (12), 8 states have call successors, (12) [2022-11-19 07:00:05,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 361 transitions. [2022-11-19 07:00:05,395 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 361 transitions. Word has length 52 [2022-11-19 07:00:05,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:00:05,396 INFO L495 AbstractCegarLoop]: Abstraction has 325 states and 361 transitions. [2022-11-19 07:00:05,396 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) [2022-11-19 07:00:05,396 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 361 transitions. [2022-11-19 07:00:05,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-11-19 07:00:05,397 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:00:05,397 INFO L195 NwaCegarLoop]: trace histogram [4, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:00:05,404 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2022-11-19 07:00:05,605 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (63)] Forceful destruction successful, exit code 0 [2022-11-19 07:00:05,811 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat -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)] Ended with exit code 0 [2022-11-19 07:00:06,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:00:06,004 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-19 07:00:06,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:00:06,004 INFO L85 PathProgramCache]: Analyzing trace with hash -170351524, now seen corresponding path program 1 times [2022-11-19 07:00:06,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:00:06,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [899968794] [2022-11-19 07:00:06,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:00:06,005 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 [2022-11-19 07:00:06,005 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:00:06,006 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 07:00:06,007 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (65)] Waiting until timeout for monitored process [2022-11-19 07:00:06,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:00:06,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-19 07:00:06,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:00:06,664 INFO L321 Elim1Store]: treesize reduction 44, result has 34.3 percent of original size [2022-11-19 07:00:06,664 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 [2022-11-19 07:00:07,375 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 32 [2022-11-19 07:00:07,430 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 25 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 07:00:07,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:00:07,620 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:00:07,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [899968794] [2022-11-19 07:00:07,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [899968794] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:00:07,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1038050595] [2022-11-19 07:00:07,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:00:07,621 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:00:07,621 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:00:07,622 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:00:07,623 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (66)] Waiting until timeout for monitored process [2022-11-19 07:00:07,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:00:07,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-19 07:00:07,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:00:08,300 INFO L321 Elim1Store]: treesize reduction 12, result has 42.9 percent of original size [2022-11-19 07:00:08,301 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 [2022-11-19 07:00:08,778 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-19 07:00:08,778 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 [2022-11-19 07:00:09,001 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-19 07:00:09,001 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:00:09,090 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 30 treesize of output 26 [2022-11-19 07:00:09,479 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 30 treesize of output 26 [2022-11-19 07:00:10,220 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-19 07:00:10,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1038050595] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:00:10,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047341489] [2022-11-19 07:00:10,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:00:10,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:00:10,221 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:00:10,223 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:00:10,247 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-11-19 07:00:10,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:00:10,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-19 07:00:10,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:00:10,421 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 07:00:10,421 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 [2022-11-19 07:00:10,892 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-19 07:00:10,892 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 [2022-11-19 07:00:11,044 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 25 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-19 07:00:11,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:00:11,146 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 30 treesize of output 26 [2022-11-19 07:00:11,500 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 30 treesize of output 26 [2022-11-19 07:00:11,702 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 23 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-19 07:00:11,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1047341489] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:00:11,703 INFO L184 FreeRefinementEngine]: Found 0 perfect and 5 imperfect interpolant sequences. [2022-11-19 07:00:11,703 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9, 7, 7] total 30 [2022-11-19 07:00:11,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845662767] [2022-11-19 07:00:11,704 INFO L85 oduleStraightlineAll]: Using 5 imperfect interpolants to construct interpolant automaton [2022-11-19 07:00:11,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-19 07:00:11,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:00:11,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-19 07:00:11,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=814, Unknown=2, NotChecked=0, Total=992 [2022-11-19 07:00:11,706 INFO L87 Difference]: Start difference. First operand 325 states and 361 transitions. Second operand has 31 states, 28 states have (on average 6.75) internal successors, (189), 29 states have internal predecessors, (189), 8 states have call successors, (11), 10 states have call predecessors, (11), 8 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) [2022-11-19 07:00:14,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:00:14,351 INFO L93 Difference]: Finished difference Result 361 states and 392 transitions. [2022-11-19 07:00:14,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-19 07:00:14,352 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 28 states have (on average 6.75) internal successors, (189), 29 states have internal predecessors, (189), 8 states have call successors, (11), 10 states have call predecessors, (11), 8 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) Word has length 57 [2022-11-19 07:00:14,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:00:14,353 INFO L225 Difference]: With dead ends: 361 [2022-11-19 07:00:14,354 INFO L226 Difference]: Without dead ends: 361 [2022-11-19 07:00:14,354 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 259 SyntacticMatches, 7 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 711 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=567, Invalid=1881, Unknown=2, NotChecked=0, Total=2450 [2022-11-19 07:00:14,355 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 658 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 314 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 658 SdHoareTripleChecker+Valid, 379 SdHoareTripleChecker+Invalid, 453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 52 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-19 07:00:14,356 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [658 Valid, 379 Invalid, 453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 314 Invalid, 0 Unknown, 52 Unchecked, 0.9s Time] [2022-11-19 07:00:14,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2022-11-19 07:00:14,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 324. [2022-11-19 07:00:14,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 297 states have (on average 1.1447811447811447) internal successors, (340), 307 states have internal predecessors, (340), 8 states have call successors, (8), 8 states have call predecessors, (8), 12 states have return successors, (12), 8 states have call predecessors, (12), 8 states have call successors, (12) [2022-11-19 07:00:14,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 360 transitions. [2022-11-19 07:00:14,364 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 360 transitions. Word has length 57 [2022-11-19 07:00:14,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:00:14,365 INFO L495 AbstractCegarLoop]: Abstraction has 324 states and 360 transitions. [2022-11-19 07:00:14,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 28 states have (on average 6.75) internal successors, (189), 29 states have internal predecessors, (189), 8 states have call successors, (11), 10 states have call predecessors, (11), 8 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) [2022-11-19 07:00:14,365 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 360 transitions. [2022-11-19 07:00:14,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-11-19 07:00:14,366 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:00:14,366 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:00:14,391 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (65)] Forceful destruction successful, exit code 0 [2022-11-19 07:00:14,599 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (66)] Forceful destruction successful, exit code 0 [2022-11-19 07:00:14,805 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2022-11-19 07:00:14,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:00:14,995 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-19 07:00:14,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:00:14,996 INFO L85 PathProgramCache]: Analyzing trace with hash -985929967, now seen corresponding path program 1 times [2022-11-19 07:00:14,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:00:14,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [162861898] [2022-11-19 07:00:14,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:00:14,996 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 [2022-11-19 07:00:14,996 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:00:14,998 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 07:00:15,002 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (68)] Waiting until timeout for monitored process [2022-11-19 07:00:15,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:00:15,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-19 07:00:15,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:00:15,618 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 07:00:15,619 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 [2022-11-19 07:00:16,782 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 18 treesize of output 24 [2022-11-19 07:00:16,906 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 [2022-11-19 07:00:16,963 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 20 proven. 17 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 07:00:16,963 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:00:17,298 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 46 treesize of output 34 [2022-11-19 07:00:18,781 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 33 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 07:00:18,782 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:00:18,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [162861898] [2022-11-19 07:00:18,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [162861898] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:00:18,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [989852392] [2022-11-19 07:00:18,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:00:18,782 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:00:18,782 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:00:18,783 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:00:18,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (69)] Waiting until timeout for monitored process [2022-11-19 07:00:19,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:00:19,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-19 07:00:19,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:00:19,983 INFO L321 Elim1Store]: treesize reduction 44, result has 34.3 percent of original size [2022-11-19 07:00:19,983 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 [2022-11-19 07:00:20,955 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 36 [2022-11-19 07:00:21,223 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 [2022-11-19 07:00:21,332 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 18 proven. 19 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 07:00:21,332 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:00:21,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [989852392] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:00:21,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526520035] [2022-11-19 07:00:21,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:00:21,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:00:21,610 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:00:21,611 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:00:21,614 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-11-19 07:00:21,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:00:21,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-19 07:00:21,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:00:22,080 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 07:00:22,080 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 [2022-11-19 07:00:23,080 INFO L321 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2022-11-19 07:00:23,080 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 [2022-11-19 07:00:23,412 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-19 07:00:23,420 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 07:00:23,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:00:23,545 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 46 treesize of output 34 [2022-11-19 07:00:23,949 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:00:23,949 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 42 treesize of output 48 [2022-11-19 07:00:24,736 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 1 proven. 36 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 07:00:24,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [526520035] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:00:24,736 INFO L184 FreeRefinementEngine]: Found 0 perfect and 5 imperfect interpolant sequences. [2022-11-19 07:00:24,736 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 13, 12, 12] total 39 [2022-11-19 07:00:24,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146074329] [2022-11-19 07:00:24,737 INFO L85 oduleStraightlineAll]: Using 5 imperfect interpolants to construct interpolant automaton [2022-11-19 07:00:24,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-11-19 07:00:24,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:00:24,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-11-19 07:00:24,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=229, Invalid=1491, Unknown=2, NotChecked=0, Total=1722 [2022-11-19 07:00:24,738 INFO L87 Difference]: Start difference. First operand 324 states and 360 transitions. Second operand has 41 states, 37 states have (on average 3.918918918918919) internal successors, (145), 33 states have internal predecessors, (145), 6 states have call successors, (11), 9 states have call predecessors, (11), 6 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2022-11-19 07:00:29,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:00:29,231 INFO L93 Difference]: Finished difference Result 357 states and 390 transitions. [2022-11-19 07:00:29,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-19 07:00:29,231 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 37 states have (on average 3.918918918918919) internal successors, (145), 33 states have internal predecessors, (145), 6 states have call successors, (11), 9 states have call predecessors, (11), 6 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) Word has length 58 [2022-11-19 07:00:29,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:00:29,233 INFO L225 Difference]: With dead ends: 357 [2022-11-19 07:00:29,233 INFO L226 Difference]: Without dead ends: 357 [2022-11-19 07:00:29,234 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 252 SyntacticMatches, 8 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1239 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=664, Invalid=3240, Unknown=2, NotChecked=0, Total=3906 [2022-11-19 07:00:29,234 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 377 mSDsluCounter, 488 mSDsCounter, 0 mSdLazyCounter, 518 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 377 SdHoareTripleChecker+Valid, 526 SdHoareTripleChecker+Invalid, 828 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 281 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:00:29,235 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [377 Valid, 526 Invalid, 828 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 518 Invalid, 0 Unknown, 281 Unchecked, 1.3s Time] [2022-11-19 07:00:29,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2022-11-19 07:00:29,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 324. [2022-11-19 07:00:29,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 297 states have (on average 1.1414141414141414) internal successors, (339), 307 states have internal predecessors, (339), 8 states have call successors, (8), 8 states have call predecessors, (8), 12 states have return successors, (12), 8 states have call predecessors, (12), 8 states have call successors, (12) [2022-11-19 07:00:29,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 359 transitions. [2022-11-19 07:00:29,245 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 359 transitions. Word has length 58 [2022-11-19 07:00:29,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:00:29,246 INFO L495 AbstractCegarLoop]: Abstraction has 324 states and 359 transitions. [2022-11-19 07:00:29,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 37 states have (on average 3.918918918918919) internal successors, (145), 33 states have internal predecessors, (145), 6 states have call successors, (11), 9 states have call predecessors, (11), 6 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2022-11-19 07:00:29,246 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 359 transitions. [2022-11-19 07:00:29,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-11-19 07:00:29,247 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:00:29,247 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] [2022-11-19 07:00:29,255 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2022-11-19 07:00:29,456 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (69)] Ended with exit code 0 [2022-11-19 07:00:29,661 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (68)] Ended with exit code 0 [2022-11-19 07:00:29,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:00:29,854 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-19 07:00:29,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:00:29,855 INFO L85 PathProgramCache]: Analyzing trace with hash 1225182698, now seen corresponding path program 1 times [2022-11-19 07:00:29,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:00:29,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2055282207] [2022-11-19 07:00:29,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:00:29,855 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 [2022-11-19 07:00:29,855 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:00:29,856 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 07:00:29,858 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (71)] Waiting until timeout for monitored process [2022-11-19 07:00:30,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:00:30,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-19 07:00:30,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:00:32,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:32,789 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 [2022-11-19 07:00:35,434 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-19 07:00:35,435 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 [2022-11-19 07:00:36,266 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 [2022-11-19 07:00:36,276 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 [2022-11-19 07:00:36,398 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:00:36,398 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:00:37,160 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:00:37,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2055282207] [2022-11-19 07:00:37,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2055282207] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:00:37,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1199195545] [2022-11-19 07:00:37,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:00:37,161 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:00:37,161 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:00:37,162 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:00:37,164 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (72)] Waiting until timeout for monitored process [2022-11-19 07:00:37,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:00:37,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-19 07:00:37,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:00:38,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:38,613 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 [2022-11-19 07:00:38,670 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:00:38,671 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 [2022-11-19 07:00:41,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:41,352 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 [2022-11-19 07:00:41,867 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 [2022-11-19 07:00:41,872 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 [2022-11-19 07:00:41,977 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 28 refuted. 7 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-19 07:00:41,977 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:00:44,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1199195545] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:00:44,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444855584] [2022-11-19 07:00:44,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:00:44,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:00:44,483 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:00:44,484 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:00:44,487 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-11-19 07:00:44,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:00:44,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-19 07:00:44,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:00:47,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:00:47,308 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 [2022-11-19 07:00:47,828 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-19 07:00:47,828 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 [2022-11-19 07:00:48,387 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 [2022-11-19 07:00:48,398 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 [2022-11-19 07:00:48,432 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:00:48,432 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:00:48,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1444855584] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:00:48,917 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:00:48,917 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 10] total 14 [2022-11-19 07:00:48,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108949959] [2022-11-19 07:00:48,918 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:00:48,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-19 07:00:48,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:00:48,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-19 07:00:48,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=373, Unknown=19, NotChecked=0, Total=462 [2022-11-19 07:00:48,919 INFO L87 Difference]: Start difference. First operand 324 states and 359 transitions. Second operand has 16 states, 15 states have (on average 4.933333333333334) internal successors, (74), 13 states have internal predecessors, (74), 3 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-19 07:00:52,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:00:52,867 INFO L93 Difference]: Finished difference Result 361 states and 394 transitions. [2022-11-19 07:00:52,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-19 07:00:52,868 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 4.933333333333334) internal successors, (74), 13 states have internal predecessors, (74), 3 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 58 [2022-11-19 07:00:52,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:00:52,870 INFO L225 Difference]: With dead ends: 361 [2022-11-19 07:00:52,870 INFO L226 Difference]: Without dead ends: 361 [2022-11-19 07:00:52,870 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 195 SyntacticMatches, 5 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 15.4s TimeCoverageRelationStatistics Valid=191, Invalid=835, Unknown=30, NotChecked=0, Total=1056 [2022-11-19 07:00:52,887 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 160 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 433 SdHoareTripleChecker+Invalid, 476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 253 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-19 07:00:52,888 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 433 Invalid, 476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 211 Invalid, 0 Unknown, 253 Unchecked, 0.7s Time] [2022-11-19 07:00:52,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2022-11-19 07:00:52,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 329. [2022-11-19 07:00:52,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 302 states have (on average 1.1390728476821192) internal successors, (344), 312 states have internal predecessors, (344), 8 states have call successors, (8), 8 states have call predecessors, (8), 12 states have return successors, (12), 8 states have call predecessors, (12), 8 states have call successors, (12) [2022-11-19 07:00:52,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 364 transitions. [2022-11-19 07:00:52,894 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 364 transitions. Word has length 58 [2022-11-19 07:00:52,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:00:52,895 INFO L495 AbstractCegarLoop]: Abstraction has 329 states and 364 transitions. [2022-11-19 07:00:52,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 4.933333333333334) internal successors, (74), 13 states have internal predecessors, (74), 3 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-19 07:00:52,895 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 364 transitions. [2022-11-19 07:00:52,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-11-19 07:00:52,896 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:00:52,896 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 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] [2022-11-19 07:00:52,909 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (71)] Forceful destruction successful, exit code 0 [2022-11-19 07:00:53,112 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (72)] Ended with exit code 0 [2022-11-19 07:00:53,314 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2022-11-19 07:00:53,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:00:53,509 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-19 07:00:53,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:00:53,510 INFO L85 PathProgramCache]: Analyzing trace with hash 1709075571, now seen corresponding path program 1 times [2022-11-19 07:00:53,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:00:53,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [800257374] [2022-11-19 07:00:53,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:00:53,510 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 [2022-11-19 07:00:53,511 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:00:53,511 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 07:00:53,512 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (74)] Waiting until timeout for monitored process [2022-11-19 07:00:53,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:00:53,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-19 07:00:53,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:00:53,940 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:00:53,940 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 [2022-11-19 07:00:54,362 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 14 treesize of output 20 [2022-11-19 07:00:54,505 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 20 proven. 20 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-19 07:00:54,506 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:00:55,982 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-19 07:00:55,982 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:00:55,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [800257374] [2022-11-19 07:00:55,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [800257374] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:00:55,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2123264201] [2022-11-19 07:00:55,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:00:55,983 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:00:55,983 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:00:55,984 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:00:55,985 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (75)] Waiting until timeout for monitored process [2022-11-19 07:00:56,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:00:56,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-19 07:00:56,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:00:56,611 INFO L321 Elim1Store]: treesize reduction 44, result has 34.3 percent of original size [2022-11-19 07:00:56,612 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 [2022-11-19 07:00:57,024 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 0 case distinctions, treesize of input 21 treesize of output 32 [2022-11-19 07:00:57,239 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 20 proven. 20 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-19 07:00:57,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:00:58,288 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-19 07:00:58,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2123264201] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:00:58,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228721886] [2022-11-19 07:00:58,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:00:58,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:00:58,289 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:00:58,290 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:00:58,292 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-11-19 07:00:58,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:00:58,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-19 07:00:58,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:00:58,606 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:00:58,606 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 [2022-11-19 07:00:58,933 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 14 treesize of output 20 [2022-11-19 07:00:58,992 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 20 proven. 20 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-19 07:00:58,993 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:01:00,029 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-19 07:01:00,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228721886] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:01:00,029 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-19 07:01:00,029 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9, 9] total 20 [2022-11-19 07:01:00,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764324244] [2022-11-19 07:01:00,030 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-19 07:01:00,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-19 07:01:00,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:01:00,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-19 07:01:00,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=361, Unknown=0, NotChecked=0, Total=462 [2022-11-19 07:01:00,031 INFO L87 Difference]: Start difference. First operand 329 states and 364 transitions. Second operand has 22 states, 19 states have (on average 5.473684210526316) internal successors, (104), 16 states have internal predecessors, (104), 4 states have call successors, (9), 7 states have call predecessors, (9), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-19 07:01:01,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:01:01,886 INFO L93 Difference]: Finished difference Result 359 states and 391 transitions. [2022-11-19 07:01:01,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-19 07:01:01,886 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 19 states have (on average 5.473684210526316) internal successors, (104), 16 states have internal predecessors, (104), 4 states have call successors, (9), 7 states have call predecessors, (9), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 60 [2022-11-19 07:01:01,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:01:01,888 INFO L225 Difference]: With dead ends: 359 [2022-11-19 07:01:01,888 INFO L226 Difference]: Without dead ends: 359 [2022-11-19 07:01:01,889 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 371 GetRequests, 322 SyntacticMatches, 12 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=380, Invalid=1102, Unknown=0, NotChecked=0, Total=1482 [2022-11-19 07:01:01,889 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 423 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 423 SdHoareTripleChecker+Valid, 365 SdHoareTripleChecker+Invalid, 466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 121 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-19 07:01:01,890 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [423 Valid, 365 Invalid, 466 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 296 Invalid, 0 Unknown, 121 Unchecked, 0.8s Time] [2022-11-19 07:01:01,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2022-11-19 07:01:01,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 328. [2022-11-19 07:01:01,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 302 states have (on average 1.1357615894039734) internal successors, (343), 311 states have internal predecessors, (343), 8 states have call successors, (8), 8 states have call predecessors, (8), 12 states have return successors, (12), 8 states have call predecessors, (12), 8 states have call successors, (12) [2022-11-19 07:01:01,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 363 transitions. [2022-11-19 07:01:01,898 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 363 transitions. Word has length 60 [2022-11-19 07:01:01,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:01:01,898 INFO L495 AbstractCegarLoop]: Abstraction has 328 states and 363 transitions. [2022-11-19 07:01:01,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 19 states have (on average 5.473684210526316) internal successors, (104), 16 states have internal predecessors, (104), 4 states have call successors, (9), 7 states have call predecessors, (9), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-19 07:01:01,899 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 363 transitions. [2022-11-19 07:01:01,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-11-19 07:01:01,900 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:01:01,900 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:01:01,905 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (75)] Forceful destruction successful, exit code 0 [2022-11-19 07:01:02,112 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (74)] Ended with exit code 0 [2022-11-19 07:01:02,309 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2022-11-19 07:01:02,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,76 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:01:02,505 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-19 07:01:02,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:01:02,505 INFO L85 PathProgramCache]: Analyzing trace with hash -1377578707, now seen corresponding path program 1 times [2022-11-19 07:01:02,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:01:02,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1965200404] [2022-11-19 07:01:02,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:01:02,506 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 [2022-11-19 07:01:02,506 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:01:02,507 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 07:01:02,508 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (77)] Waiting until timeout for monitored process [2022-11-19 07:01:02,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:01:02,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-19 07:01:02,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:01:03,516 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 22 treesize of output 10 [2022-11-19 07:01:03,622 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 21 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:01:03,622 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:01:04,292 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 24 treesize of output 12 [2022-11-19 07:01:04,381 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:01:04,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1965200404] [2022-11-19 07:01:04,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1965200404] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:01:04,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [95036540] [2022-11-19 07:01:04,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:01:04,383 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:01:04,383 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:01:04,384 INFO L229 MonitoredProcess]: Starting monitored process 78 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:01:04,399 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (78)] Waiting until timeout for monitored process [2022-11-19 07:01:04,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:01:04,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-19 07:01:04,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:01:05,598 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 18 treesize of output 10 [2022-11-19 07:01:05,676 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 34 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-19 07:01:05,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:01:05,877 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-19 07:01:05,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [95036540] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-19 07:01:05,878 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-19 07:01:05,878 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10, 5] total 20 [2022-11-19 07:01:05,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695536727] [2022-11-19 07:01:05,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:01:05,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 07:01:05,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:01:05,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 07:01:05,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2022-11-19 07:01:05,880 INFO L87 Difference]: Start difference. First operand 328 states and 363 transitions. Second operand has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 6 states have internal predecessors, (41), 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) [2022-11-19 07:01:06,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:01:06,414 INFO L93 Difference]: Finished difference Result 337 states and 364 transitions. [2022-11-19 07:01:06,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 07:01:06,415 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 6 states have internal predecessors, (41), 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 60 [2022-11-19 07:01:06,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:01:06,416 INFO L225 Difference]: With dead ends: 337 [2022-11-19 07:01:06,416 INFO L226 Difference]: Without dead ends: 337 [2022-11-19 07:01:06,416 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=109, Invalid=443, Unknown=0, NotChecked=0, Total=552 [2022-11-19 07:01:06,416 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 114 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:01:06,417 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 85 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 07:01:06,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2022-11-19 07:01:06,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 281. [2022-11-19 07:01:06,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 258 states have (on average 1.1007751937984496) internal successors, (284), 266 states have internal predecessors, (284), 7 states have call successors, (7), 7 states have call predecessors, (7), 11 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) [2022-11-19 07:01:06,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 302 transitions. [2022-11-19 07:01:06,422 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 302 transitions. Word has length 60 [2022-11-19 07:01:06,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:01:06,423 INFO L495 AbstractCegarLoop]: Abstraction has 281 states and 302 transitions. [2022-11-19 07:01:06,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 6 states have internal predecessors, (41), 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) [2022-11-19 07:01:06,423 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 302 transitions. [2022-11-19 07:01:06,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-11-19 07:01:06,424 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:01:06,424 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:01:06,433 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (77)] Forceful destruction successful, exit code 0 [2022-11-19 07:01:06,629 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (78)] Ended with exit code 0 [2022-11-19 07:01:06,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,78 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt [2022-11-19 07:01:06,827 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting parse_inputErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-19 07:01:06,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:01:06,828 INFO L85 PathProgramCache]: Analyzing trace with hash -1338644167, now seen corresponding path program 1 times [2022-11-19 07:01:06,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:01:06,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1628053205] [2022-11-19 07:01:06,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:01:06,828 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 [2022-11-19 07:01:06,828 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:01:06,829 INFO L229 MonitoredProcess]: Starting monitored process 79 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 07:01:06,831 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (79)] Waiting until timeout for monitored process [2022-11-19 07:01:07,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:01:07,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-19 07:01:07,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:01:10,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:01:10,041 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 [2022-11-19 07:01:10,564 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-19 07:01:10,564 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:01:11,702 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:01:11,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1628053205] [2022-11-19 07:01:11,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1628053205] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:01:11,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2104848232] [2022-11-19 07:01:11,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:01:11,703 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:01:11,703 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:01:11,704 INFO L229 MonitoredProcess]: Starting monitored process 80 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:01:11,705 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (80)] Waiting until timeout for monitored process [2022-11-19 07:01:12,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:01:12,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-19 07:01:12,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:01:15,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:01:15,125 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 [2022-11-19 07:01:15,464 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-19 07:01:15,464 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:01:18,222 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2104848232] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:01:18,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311855975] [2022-11-19 07:01:18,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:01:18,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:01:18,222 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:01:18,223 INFO L229 MonitoredProcess]: Starting monitored process 81 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:01:18,227 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-11-19 07:01:18,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:01:18,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-19 07:01:18,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:01:23,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:01:23,374 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 [2022-11-19 07:01:23,715 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 6 proven. 71 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-19 07:01:23,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:01:24,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311855975] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:01:24,648 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:01:24,648 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 8] total 9 [2022-11-19 07:01:24,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818043347] [2022-11-19 07:01:24,648 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:01:24,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-19 07:01:24,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:01:24,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-19 07:01:24,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=161, Unknown=5, NotChecked=0, Total=210 [2022-11-19 07:01:24,650 INFO L87 Difference]: Start difference. First operand 281 states and 302 transitions. Second operand has 11 states, 10 states have (on average 5.9) internal successors, (59), 10 states have internal predecessors, (59), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-11-19 07:01:32,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:01:32,168 INFO L93 Difference]: Finished difference Result 345 states and 367 transitions. [2022-11-19 07:01:32,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-19 07:01:32,169 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 5.9) internal successors, (59), 10 states have internal predecessors, (59), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 62 [2022-11-19 07:01:32,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:01:32,170 INFO L225 Difference]: With dead ends: 345 [2022-11-19 07:01:32,171 INFO L226 Difference]: Without dead ends: 345 [2022-11-19 07:01:32,171 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 222 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 18.5s TimeCoverageRelationStatistics Valid=184, Invalid=510, Unknown=8, NotChecked=0, Total=702 [2022-11-19 07:01:32,172 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 239 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 58 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-19 07:01:32,172 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [239 Valid, 325 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 198 Invalid, 0 Unknown, 58 Unchecked, 0.6s Time] [2022-11-19 07:01:32,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2022-11-19 07:01:32,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 281. [2022-11-19 07:01:32,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 258 states have (on average 1.1007751937984496) internal successors, (284), 266 states have internal predecessors, (284), 7 states have call successors, (7), 7 states have call predecessors, (7), 11 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) [2022-11-19 07:01:32,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 302 transitions. [2022-11-19 07:01:32,178 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 302 transitions. Word has length 62 [2022-11-19 07:01:32,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:01:32,179 INFO L495 AbstractCegarLoop]: Abstraction has 281 states and 302 transitions. [2022-11-19 07:01:32,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 5.9) internal successors, (59), 10 states have internal predecessors, (59), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-11-19 07:01:32,179 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 302 transitions. [2022-11-19 07:01:32,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-11-19 07:01:32,180 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:01:32,181 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:01:32,195 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (79)] Forceful destruction successful, exit code 0 [2022-11-19 07:01:32,406 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2022-11-19 07:01:32,597 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (80)] Forceful destruction successful, exit code 0 [2022-11-19 07:01:32,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,81 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,80 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt [2022-11-19 07:01:32,794 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting parse_inputErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-19 07:01:32,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:01:32,795 INFO L85 PathProgramCache]: Analyzing trace with hash -1412438832, now seen corresponding path program 1 times [2022-11-19 07:01:32,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:01:32,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [328925989] [2022-11-19 07:01:32,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:01:32,796 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 [2022-11-19 07:01:32,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:01:32,796 INFO L229 MonitoredProcess]: Starting monitored process 82 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 07:01:32,798 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (82)] Waiting until timeout for monitored process [2022-11-19 07:01:32,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:01:32,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-19 07:01:32,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:01:35,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:01:35,560 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 [2022-11-19 07:01:37,908 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 07:01:37,908 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 [2022-11-19 07:01:38,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:01:38,446 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 [2022-11-19 07:01:38,879 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:01:38,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:01:39,815 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-11-19 07:01:39,815 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 [2022-11-19 07:01:42,519 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-11-19 07:01:42,520 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 [2022-11-19 07:01:44,203 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:01:44,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [328925989] [2022-11-19 07:01:44,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [328925989] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:01:44,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [187977657] [2022-11-19 07:01:44,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:01:44,204 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:01:44,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:01:44,205 INFO L229 MonitoredProcess]: Starting monitored process 83 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:01:44,207 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (83)] Waiting until timeout for monitored process [2022-11-19 07:01:44,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:01:44,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-19 07:01:44,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:01:47,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:01:47,083 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 [2022-11-19 07:01:47,349 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 07:01:47,350 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 [2022-11-19 07:01:47,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:01:47,889 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 [2022-11-19 07:01:48,237 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:01:48,238 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:01:48,804 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-11-19 07:01:48,804 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 [2022-11-19 07:01:51,551 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-11-19 07:01:51,551 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 [2022-11-19 07:01:52,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [187977657] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:01:52,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915835032] [2022-11-19 07:01:52,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:01:52,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:01:52,093 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:01:52,095 INFO L229 MonitoredProcess]: Starting monitored process 84 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:01:52,096 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-11-19 07:01:52,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:01:52,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-19 07:01:52,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:01:52,515 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 07:01:52,515 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 [2022-11-19 07:01:53,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:01:53,074 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 [2022-11-19 07:01:53,365 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 07:01:53,365 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 [2022-11-19 07:01:54,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:01:54,015 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 [2022-11-19 07:01:54,370 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-19 07:01:54,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:01:54,950 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-11-19 07:01:54,950 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 [2022-11-19 07:01:57,725 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-11-19 07:01:57,725 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 [2022-11-19 07:01:58,048 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-11-19 07:01:58,048 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 [2022-11-19 07:02:00,843 INFO L321 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-11-19 07:02:00,843 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 [2022-11-19 07:02:01,033 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 2 proven. 37 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-19 07:02:01,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915835032] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:02:01,033 INFO L184 FreeRefinementEngine]: Found 0 perfect and 4 imperfect interpolant sequences. [2022-11-19 07:02:01,033 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 6, 5] total 14 [2022-11-19 07:02:01,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647667584] [2022-11-19 07:02:01,033 INFO L85 oduleStraightlineAll]: Using 4 imperfect interpolants to construct interpolant automaton [2022-11-19 07:02:01,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-19 07:02:01,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:02:01,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-19 07:02:01,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=223, Unknown=10, NotChecked=0, Total=306 [2022-11-19 07:02:01,035 INFO L87 Difference]: Start difference. First operand 281 states and 302 transitions. Second operand has 16 states, 15 states have (on average 7.266666666666667) internal successors, (109), 15 states have internal predecessors, (109), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-11-19 07:02:08,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:02:08,196 INFO L93 Difference]: Finished difference Result 334 states and 357 transitions. [2022-11-19 07:02:08,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-19 07:02:08,196 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 7.266666666666667) internal successors, (109), 15 states have internal predecessors, (109), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 62 [2022-11-19 07:02:08,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:02:08,198 INFO L225 Difference]: With dead ends: 334 [2022-11-19 07:02:08,198 INFO L226 Difference]: Without dead ends: 334 [2022-11-19 07:02:08,199 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 292 SyntacticMatches, 16 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 26.3s TimeCoverageRelationStatistics Valid=183, Invalid=454, Unknown=13, NotChecked=0, Total=650 [2022-11-19 07:02:08,200 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 195 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 75 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 07:02:08,200 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [195 Valid, 143 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 144 Invalid, 0 Unknown, 75 Unchecked, 0.5s Time] [2022-11-19 07:02:08,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2022-11-19 07:02:08,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 236. [2022-11-19 07:02:08,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 218 states have (on average 1.091743119266055) internal successors, (238), 223 states have internal predecessors, (238), 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) [2022-11-19 07:02:08,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 253 transitions. [2022-11-19 07:02:08,207 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 253 transitions. Word has length 62 [2022-11-19 07:02:08,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:02:08,208 INFO L495 AbstractCegarLoop]: Abstraction has 236 states and 253 transitions. [2022-11-19 07:02:08,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 7.266666666666667) internal successors, (109), 15 states have internal predecessors, (109), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-11-19 07:02:08,208 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 253 transitions. [2022-11-19 07:02:08,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-11-19 07:02:08,209 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:02:08,209 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 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, 1, 1, 1, 1, 1, 1] [2022-11-19 07:02:08,224 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (82)] Ended with exit code 0 [2022-11-19 07:02:08,432 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (83)] Forceful destruction successful, exit code 0 [2022-11-19 07:02:08,634 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2022-11-19 07:02:08,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,83 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt,84 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:02:08,822 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-19 07:02:08,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:02:08,823 INFO L85 PathProgramCache]: Analyzing trace with hash 1170616042, now seen corresponding path program 2 times [2022-11-19 07:02:08,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:02:08,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [912796726] [2022-11-19 07:02:08,823 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 07:02:08,823 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 [2022-11-19 07:02:08,824 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:02:08,824 INFO L229 MonitoredProcess]: Starting monitored process 85 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 07:02:08,825 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (85)] Waiting until timeout for monitored process [2022-11-19 07:02:09,041 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 07:02:09,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:02:09,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-19 07:02:09,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:02:09,666 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:02:09,666 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 [2022-11-19 07:02:11,056 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2022-11-19 07:02:11,463 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 [2022-11-19 07:02:11,554 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 20 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:02:11,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:02:12,373 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:02:12,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [912796726] [2022-11-19 07:02:12,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [912796726] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:02:12,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1236896892] [2022-11-19 07:02:12,374 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 07:02:12,374 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-19 07:02:12,374 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/cvc4 [2022-11-19 07:02:12,376 INFO L229 MonitoredProcess]: Starting monitored process 86 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-19 07:02:12,377 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (86)] Waiting until timeout for monitored process [2022-11-19 07:02:12,851 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 07:02:12,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:02:12,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-19 07:02:12,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:02:13,492 INFO L321 Elim1Store]: treesize reduction 44, result has 34.3 percent of original size [2022-11-19 07:02:13,493 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 [2022-11-19 07:02:14,564 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 38 [2022-11-19 07:02:15,156 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 [2022-11-19 07:02:15,247 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 20 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:02:15,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:02:15,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1236896892] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:02:15,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440530422] [2022-11-19 07:02:15,612 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-19 07:02:15,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:02:15,612 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:02:15,613 INFO L229 MonitoredProcess]: Starting monitored process 87 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:02:15,615 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2022-11-19 07:02:15,745 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-19 07:02:15,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:02:15,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-19 07:02:15,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:02:16,321 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-19 07:02:16,322 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 [2022-11-19 07:02:17,552 INFO L321 Elim1Store]: treesize reduction 25, result has 47.9 percent of original size [2022-11-19 07:02:17,553 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 20 treesize of output 36 [2022-11-19 07:02:18,051 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 [2022-11-19 07:02:18,057 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:02:18,057 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:02:18,323 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 54 treesize of output 38 [2022-11-19 07:02:18,927 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:02:18,927 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 48 treesize of output 54 [2022-11-19 07:02:20,719 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 1 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:02:20,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1440530422] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:02:20,720 INFO L184 FreeRefinementEngine]: Found 0 perfect and 4 imperfect interpolant sequences. [2022-11-19 07:02:20,720 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14, 14] total 42 [2022-11-19 07:02:20,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79049191] [2022-11-19 07:02:20,720 INFO L85 oduleStraightlineAll]: Using 4 imperfect interpolants to construct interpolant automaton [2022-11-19 07:02:20,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-11-19 07:02:20,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:02:20,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-11-19 07:02:20,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=1748, Unknown=2, NotChecked=0, Total=1980 [2022-11-19 07:02:20,723 INFO L87 Difference]: Start difference. First operand 236 states and 253 transitions. Second operand has 44 states, 39 states have (on average 4.384615384615385) internal successors, (171), 36 states have internal predecessors, (171), 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) [2022-11-19 07:02:27,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:02:27,153 INFO L93 Difference]: Finished difference Result 305 states and 324 transitions. [2022-11-19 07:02:27,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-11-19 07:02:27,154 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 39 states have (on average 4.384615384615385) internal successors, (171), 36 states have internal predecessors, (171), 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 66 [2022-11-19 07:02:27,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:02:27,155 INFO L225 Difference]: With dead ends: 305 [2022-11-19 07:02:27,155 INFO L226 Difference]: Without dead ends: 305 [2022-11-19 07:02:27,156 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 244 SyntacticMatches, 7 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1522 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=825, Invalid=4285, Unknown=2, NotChecked=0, Total=5112 [2022-11-19 07:02:27,157 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 618 mSDsluCounter, 507 mSDsCounter, 0 mSdLazyCounter, 604 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 618 SdHoareTripleChecker+Valid, 538 SdHoareTripleChecker+Invalid, 856 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 604 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 198 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-19 07:02:27,157 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [618 Valid, 538 Invalid, 856 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 604 Invalid, 0 Unknown, 198 Unchecked, 1.7s Time] [2022-11-19 07:02:27,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2022-11-19 07:02:27,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 235. [2022-11-19 07:02:27,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 218 states have (on average 1.0871559633027523) internal successors, (237), 222 states have internal predecessors, (237), 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) [2022-11-19 07:02:27,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 252 transitions. [2022-11-19 07:02:27,163 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 252 transitions. Word has length 66 [2022-11-19 07:02:27,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:02:27,163 INFO L495 AbstractCegarLoop]: Abstraction has 235 states and 252 transitions. [2022-11-19 07:02:27,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 39 states have (on average 4.384615384615385) internal successors, (171), 36 states have internal predecessors, (171), 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) [2022-11-19 07:02:27,164 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 252 transitions. [2022-11-19 07:02:27,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-19 07:02:27,164 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:02:27,165 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:02:27,177 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (85)] Forceful destruction successful, exit code 0 [2022-11-19 07:02:27,377 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2022-11-19 07:02:27,578 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt (86)] Forceful destruction successful, exit code 0 [2022-11-19 07:02:27,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,87 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,86 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/cvc4 --incremental --print-success --lang smt [2022-11-19 07:02:27,771 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-19 07:02:27,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:02:27,772 INFO L85 PathProgramCache]: Analyzing trace with hash 1008566956, now seen corresponding path program 1 times [2022-11-19 07:02:27,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:02:27,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [618638070] [2022-11-19 07:02:27,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:02:27,772 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 [2022-11-19 07:02:27,772 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:02:27,773 INFO L229 MonitoredProcess]: Starting monitored process 88 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 07:02:27,776 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (88)] Waiting until timeout for monitored process [2022-11-19 07:02:27,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:02:27,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-19 07:02:27,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:02:28,209 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2022-11-19 07:02:28,209 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:02:28,209 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-19 07:02:28,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [618638070] [2022-11-19 07:02:28,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [618638070] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:02:28,209 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:02:28,210 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:02:28,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301952558] [2022-11-19 07:02:28,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:02:28,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:02:28,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-19 07:02:28,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:02:28,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:02:28,211 INFO L87 Difference]: Start difference. First operand 235 states and 252 transitions. Second operand has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-19 07:02:28,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:02:28,338 INFO L93 Difference]: Finished difference Result 245 states and 261 transitions. [2022-11-19 07:02:28,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 07:02:28,339 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 67 [2022-11-19 07:02:28,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:02:28,341 INFO L225 Difference]: With dead ends: 245 [2022-11-19 07:02:28,341 INFO L226 Difference]: Without dead ends: 229 [2022-11-19 07:02:28,341 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:02:28,341 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 11 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:02:28,341 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 65 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:02:28,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2022-11-19 07:02:28,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 223. [2022-11-19 07:02:28,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 206 states have (on average 1.0825242718446602) internal successors, (223), 210 states have internal predecessors, (223), 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) [2022-11-19 07:02:28,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 238 transitions. [2022-11-19 07:02:28,345 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 238 transitions. Word has length 67 [2022-11-19 07:02:28,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:02:28,345 INFO L495 AbstractCegarLoop]: Abstraction has 223 states and 238 transitions. [2022-11-19 07:02:28,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-19 07:02:28,345 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 238 transitions. [2022-11-19 07:02:28,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-19 07:02:28,346 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:02:28,346 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:02:28,362 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (88)] Ended with exit code 0 [2022-11-19 07:02:28,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:02:28,547 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2022-11-19 07:02:28,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:02:28,547 INFO L85 PathProgramCache]: Analyzing trace with hash 1133646903, now seen corresponding path program 1 times [2022-11-19 07:02:28,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-19 07:02:28,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1892647834] [2022-11-19 07:02:28,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:02:28,548 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 [2022-11-19 07:02:28,548 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat [2022-11-19 07:02:28,549 INFO L229 MonitoredProcess]: Starting monitored process 89 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat -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) [2022-11-19 07:02:28,551 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (89)] Waiting until timeout for monitored process [2022-11-19 07:02:28,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-19 07:02:28,742 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-19 07:02:28,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-19 07:02:28,939 INFO L130 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2022-11-19 07:02:28,940 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-19 07:02:28,941 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK (19 of 20 remaining) [2022-11-19 07:02:28,943 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 20 remaining) [2022-11-19 07:02:28,943 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 20 remaining) [2022-11-19 07:02:28,944 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (16 of 20 remaining) [2022-11-19 07:02:28,944 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (15 of 20 remaining) [2022-11-19 07:02:28,944 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE (14 of 20 remaining) [2022-11-19 07:02:28,944 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE (13 of 20 remaining) [2022-11-19 07:02:28,944 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 20 remaining) [2022-11-19 07:02:28,945 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 20 remaining) [2022-11-19 07:02:28,945 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 20 remaining) [2022-11-19 07:02:28,945 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 20 remaining) [2022-11-19 07:02:28,945 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr10ASSERT_VIOLATIONMEMORY_FREE (8 of 20 remaining) [2022-11-19 07:02:28,945 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr11ASSERT_VIOLATIONMEMORY_FREE (7 of 20 remaining) [2022-11-19 07:02:28,946 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr12ASSERT_VIOLATIONMEMORY_FREE (6 of 20 remaining) [2022-11-19 07:02:28,946 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr13ASSERT_VIOLATIONMEMORY_FREE (5 of 20 remaining) [2022-11-19 07:02:28,946 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr14ASSERT_VIOLATIONMEMORY_FREE (4 of 20 remaining) [2022-11-19 07:02:28,946 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr15ASSERT_VIOLATIONMEMORY_FREE (3 of 20 remaining) [2022-11-19 07:02:28,947 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr16ASSERT_VIOLATIONMEMORY_FREE (2 of 20 remaining) [2022-11-19 07:02:28,947 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr17ASSERT_VIOLATIONMEMORY_FREE (1 of 20 remaining) [2022-11-19 07:02:28,947 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr18ASSERT_VIOLATIONMEMORY_FREE (0 of 20 remaining) [2022-11-19 07:02:28,962 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (89)] Ended with exit code 0 [2022-11-19 07:02:29,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-19 07:02:29,165 INFO L444 BasicCegarLoop]: Path program 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:02:29,168 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-19 07:02:29,257 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.11 07:02:29 BoogieIcfgContainer [2022-11-19 07:02:29,257 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-19 07:02:29,257 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-19 07:02:29,271 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-19 07:02:29,271 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-19 07:02:29,271 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 06:55:09" (3/4) ... [2022-11-19 07:02:29,274 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-11-19 07:02:29,277 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-19 07:02:29,277 INFO L158 Benchmark]: Toolchain (without parser) took 441268.17ms. Allocated memory was 65.0MB in the beginning and 113.2MB in the end (delta: 48.2MB). Free memory was 44.6MB in the beginning and 83.1MB in the end (delta: -38.4MB). Peak memory consumption was 10.3MB. Max. memory is 16.1GB. [2022-11-19 07:02:29,277 INFO L158 Benchmark]: CDTParser took 0.33ms. Allocated memory is still 65.0MB. Free memory was 46.5MB in the beginning and 46.5MB in the end (delta: 48.4kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-19 07:02:29,278 INFO L158 Benchmark]: CACSL2BoogieTranslator took 613.06ms. Allocated memory is still 65.0MB. Free memory was 44.4MB in the beginning and 39.2MB in the end (delta: 5.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-19 07:02:29,278 INFO L158 Benchmark]: Boogie Procedure Inliner took 79.55ms. Allocated memory is still 65.0MB. Free memory was 39.0MB in the beginning and 36.7MB in the end (delta: 2.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-19 07:02:29,278 INFO L158 Benchmark]: Boogie Preprocessor took 67.66ms. Allocated memory is still 65.0MB. Free memory was 36.7MB in the beginning and 35.0MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-19 07:02:29,278 INFO L158 Benchmark]: RCFGBuilder took 689.56ms. Allocated memory is still 65.0MB. Free memory was 34.8MB in the beginning and 35.2MB in the end (delta: -397.4kB). Peak memory consumption was 10.6MB. Max. memory is 16.1GB. [2022-11-19 07:02:29,278 INFO L158 Benchmark]: TraceAbstraction took 439791.51ms. Allocated memory was 65.0MB in the beginning and 113.2MB in the end (delta: 48.2MB). Free memory was 34.7MB in the beginning and 83.1MB in the end (delta: -48.4MB). Peak memory consumption was 59.1MB. Max. memory is 16.1GB. [2022-11-19 07:02:29,279 INFO L158 Benchmark]: Witness Printer took 19.26ms. Allocated memory is still 113.2MB. Free memory was 83.1MB in the beginning and 83.1MB in the end (delta: 2.0kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-19 07:02:29,280 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33ms. Allocated memory is still 65.0MB. Free memory was 46.5MB in the beginning and 46.5MB in the end (delta: 48.4kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 613.06ms. Allocated memory is still 65.0MB. Free memory was 44.4MB in the beginning and 39.2MB in the end (delta: 5.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 79.55ms. Allocated memory is still 65.0MB. Free memory was 39.0MB in the beginning and 36.7MB in the end (delta: 2.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 67.66ms. Allocated memory is still 65.0MB. Free memory was 36.7MB in the beginning and 35.0MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 689.56ms. Allocated memory is still 65.0MB. Free memory was 34.8MB in the beginning and 35.2MB in the end (delta: -397.4kB). Peak memory consumption was 10.6MB. Max. memory is 16.1GB. * TraceAbstraction took 439791.51ms. Allocated memory was 65.0MB in the beginning and 113.2MB in the end (delta: 48.2MB). Free memory was 34.7MB in the beginning and 83.1MB in the end (delta: -48.4MB). Peak memory consumption was 59.1MB. Max. memory is 16.1GB. * Witness Printer took 19.26ms. Allocated memory is still 113.2MB. Free memory was 83.1MB in the beginning and 83.1MB in the end (delta: 2.0kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. * 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, overapproximation of memtrack at line 721. Possible FailurePath: [L686] char *global = 0; [L685] int state = STATE_1; [L687-L690] const struct command commands[] = { {"c1",c1,STATE_1}, {"c2",c2,STATE_2} }; VAL [commands={6:0}, global={0:0}, state=0] [L722] CALL parse_input("c1") VAL [\old(global)=null, \old(global)=null, \old(state)=0, commands={6:0}, global={0:0}, state=0] [L692] int i = 0; VAL [\old(global)=null, \old(global)=null, \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)=null, \old(global)=null, \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)=null, \old(global)=null, \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)=null, \old(global)=null, \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)=null, \old(global)=null, \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)=null, \old(global)=null, \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)=null, \old(global)=null, \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)=null, \old(global)=null, \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)=null, \old(global)=null, \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)=null, \old(global)=null, \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)=null, \old(global)=null, \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)=null, \old(global)=null, \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)=null, \old(global)=null, \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)=null, \old(global)=null, \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)=null, \old(global)=null, \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)=null, \old(global)=null, \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)=null, \old(global)=null, \old(state)=0, commands={6:0}, global={0:0}, state=0] [L692] int i = 0; VAL [\old(global)=null, \old(global)=null, \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)=null, \old(global)=null, \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)=null, \old(global)=null, \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)=null, \old(global)=null, \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)=null, \old(global)=null, \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)=null, \old(global)=null, \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)=null, \old(global)=null, \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)=null, \old(global)=null, \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)=null, \old(global)=null, \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)=null, \old(global)=null, \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)=null, \old(global)=null, \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)=null, \old(global)=null, \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)=null, \old(global)=null, \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)=null, \old(global)=null, \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)=null, \old(global)=null, \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)=null, \old(global)=null, \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)=null, \old(global)=null, \old(state)=0, commands={6:0}, global={0:0}, state=0] [L692] int i = 0; VAL [\old(global)=null, \old(global)=null, \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)=null, \old(global)=null, \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)=null, \old(global)=null, \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)=null, \old(global)=null, \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)=null, \old(global)=null, \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)=null, \old(global)=null, \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)=null, \old(global)=null, \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)=null, \old(global)=null, \old(state)=0, commands={6:0}, commands[i].state_needed=0, global={0:0}, i=0, input={5:0}, input={5:0}, state=0] [L694] COND TRUE state >= commands[i].state_needed [L695] EXPR commands[i].function VAL [\old(global)=null, \old(global)=null, \old(state)=0, commands={6:0}, commands[i].function={-1:0}, global={0:0}, i=0, input={5:0}, input={5:0}, state=0] [L695] CALL commands[i].function() [L702] char *x = (char *)malloc(sizeof(char)); [L703] COND FALSE !(!x) VAL [\old(global)=null, \old(global)=null, \old(state)=0, commands={6:0}, global={0:0}, state=0, x={7:0}] [L706] COND FALSE !(\read(*global)) VAL [\old(global)=null, \old(global)=null, \old(state)=0, commands={6:0}, global={0:0}, state=0, x={7:0}] [L708] global = x [L709] state = STATE_2 VAL [\old(global)=null, \old(global)=null, \old(state)=0, commands={6:0}, global={7:0}, state=1, x={7:0}] [L695] RET commands[i].function() [L724] RET parse_input("c2") VAL [commands={6:0}, global={7:0}, state=1] [L725] return 0; VAL [\result=0, commands={6:0}, global={7:0}, state=1] - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 693]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 693]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 693]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 693]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 714]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 714]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 714]: 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: 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. - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 61 locations, 20 error locations. Started 1 CEGAR loops. OverallTime: 439.6s, OverallIterations: 41, TraceHistogramMax: 6, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.1s, AutomataDifference: 135.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 11804 SdHoareTripleChecker+Valid, 23.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 11804 mSDsluCounter, 10725 SdHoareTripleChecker+Invalid, 20.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 1921 IncrementalHoareTripleChecker+Unchecked, 8390 mSDsCounter, 883 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 7438 IncrementalHoareTripleChecker+Invalid, 10242 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 883 mSolverCounterUnsat, 2335 mSDtfsCounter, 7438 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 5698 GetRequests, 4839 SyntacticMatches, 104 SemanticMatches, 755 ConstructedPredicates, 1 IntricatePredicates, 2 DeprecatedPredicates, 7949 ImplicationChecksByTransitivity, 295.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=559occurred in iteration=11, InterpolantAutomatonStates: 487, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.6s AutomataMinimizationTime, 40 MinimizatonAttempts, 2567 StatesRemovedByMinimization, 40 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.8s SsaConstructionTime, 8.4s SatisfiabilityAnalysisTime, 271.1s InterpolantComputationTime, 3548 NumberOfCodeBlocks, 3548 NumberOfCodeBlocksAsserted, 94 NumberOfCheckSat, 4883 ConstructedInterpolants, 627 QuantifiedInterpolants, 74810 SizeOfPredicates, 373 NumberOfNonLiveVariables, 13525 ConjunctsInSsa, 1171 ConjunctsInUnsatCore, 127 InterpolantComputations, 17 PerfectInterpolantSequences, 1918/4070 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2022-11-19 07:02:29,374 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01cf6bcb-9a82-4292-959a-93ae04159a9e/bin/utaipan-I9t0OCRTmS/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 Writing output log to file Ultimate.log Result: UNKNOWN: Overapproximated counterexample