./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/bitvector/parity.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a 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_7c5640af-f400-4c67-833b-b83a087831e7/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5640af-f400-4c67-833b-b83a087831e7/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5640af-f400-4c67-833b-b83a087831e7/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5640af-f400-4c67-833b-b83a087831e7/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/bitvector/parity.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5640af-f400-4c67-833b-b83a087831e7/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5640af-f400-4c67-833b-b83a087831e7/bin/utaipan-7li7fVZpFI --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash d7c1c6c2f4d5b2d24ba57b817b67aabcbf492bd9ab5f9a13bcbf3c0241dcb4b3 --- 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-5e519f3 [2022-11-03 01:40:56,444 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 01:40:56,448 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 01:40:56,508 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 01:40:56,508 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 01:40:56,513 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 01:40:56,515 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 01:40:56,520 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 01:40:56,523 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 01:40:56,529 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 01:40:56,530 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 01:40:56,533 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 01:40:56,534 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 01:40:56,537 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 01:40:56,539 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 01:40:56,541 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 01:40:56,543 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 01:40:56,544 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 01:40:56,546 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 01:40:56,557 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 01:40:56,559 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 01:40:56,560 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 01:40:56,564 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 01:40:56,565 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 01:40:56,575 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 01:40:56,576 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 01:40:56,576 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 01:40:56,579 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 01:40:56,579 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 01:40:56,580 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 01:40:56,581 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 01:40:56,582 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 01:40:56,585 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 01:40:56,586 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 01:40:56,589 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 01:40:56,589 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 01:40:56,590 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 01:40:56,591 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 01:40:56,591 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 01:40:56,592 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 01:40:56,593 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 01:40:56,594 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5640af-f400-4c67-833b-b83a087831e7/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-03 01:40:56,642 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 01:40:56,643 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 01:40:56,644 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 01:40:56,644 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 01:40:56,645 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 01:40:56,645 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 01:40:56,646 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 01:40:56,646 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 01:40:56,646 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 01:40:56,647 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 01:40:56,648 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 01:40:56,648 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 01:40:56,649 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 01:40:56,649 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 01:40:56,649 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 01:40:56,650 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 01:40:56,650 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 01:40:56,650 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 01:40:56,651 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 01:40:56,651 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 01:40:56,652 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 01:40:56,652 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 01:40:56,652 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 01:40:56,652 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 01:40:56,653 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 01:40:56,653 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 01:40:56,653 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 01:40:56,654 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 01:40:56,654 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 01:40:56,654 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 01:40:56,654 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 01:40:56,655 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 01:40:56,655 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 01:40:56,656 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 01:40:56,656 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 01:40:56,656 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 01:40:56,656 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 01:40:56,657 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 01:40:56,657 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 01:40:56,657 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 01:40:56,657 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 01:40:56,658 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_7c5640af-f400-4c67-833b-b83a087831e7/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5640af-f400-4c67-833b-b83a087831e7/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d7c1c6c2f4d5b2d24ba57b817b67aabcbf492bd9ab5f9a13bcbf3c0241dcb4b3 [2022-11-03 01:40:57,028 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 01:40:57,062 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 01:40:57,066 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 01:40:57,068 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 01:40:57,069 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 01:40:57,070 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5640af-f400-4c67-833b-b83a087831e7/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/bitvector/parity.i [2022-11-03 01:40:57,180 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5640af-f400-4c67-833b-b83a087831e7/bin/utaipan-7li7fVZpFI/data/02b9d7ebf/67d8709c934c48bdb0a2cdc260c96d84/FLAG9945b417f [2022-11-03 01:40:57,716 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 01:40:57,717 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5640af-f400-4c67-833b-b83a087831e7/sv-benchmarks/c/bitvector/parity.i [2022-11-03 01:40:57,726 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5640af-f400-4c67-833b-b83a087831e7/bin/utaipan-7li7fVZpFI/data/02b9d7ebf/67d8709c934c48bdb0a2cdc260c96d84/FLAG9945b417f [2022-11-03 01:40:58,075 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5640af-f400-4c67-833b-b83a087831e7/bin/utaipan-7li7fVZpFI/data/02b9d7ebf/67d8709c934c48bdb0a2cdc260c96d84 [2022-11-03 01:40:58,078 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 01:40:58,079 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 01:40:58,086 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 01:40:58,087 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 01:40:58,091 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 01:40:58,092 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:40:58" (1/1) ... [2022-11-03 01:40:58,094 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@472cd1df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:40:58, skipping insertion in model container [2022-11-03 01:40:58,095 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:40:58" (1/1) ... [2022-11-03 01:40:58,103 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 01:40:58,133 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 01:40:58,398 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5640af-f400-4c67-833b-b83a087831e7/sv-benchmarks/c/bitvector/parity.i[1162,1175] [2022-11-03 01:40:58,433 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:40:58,443 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 01:40:58,465 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5640af-f400-4c67-833b-b83a087831e7/sv-benchmarks/c/bitvector/parity.i[1162,1175] [2022-11-03 01:40:58,487 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:40:58,515 INFO L208 MainTranslator]: Completed translation [2022-11-03 01:40:58,525 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:40:58 WrapperNode [2022-11-03 01:40:58,525 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 01:40:58,526 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 01:40:58,526 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 01:40:58,526 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 01:40:58,536 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:40:58" (1/1) ... [2022-11-03 01:40:58,545 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:40:58" (1/1) ... [2022-11-03 01:40:58,572 INFO L138 Inliner]: procedures = 15, calls = 7, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 42 [2022-11-03 01:40:58,572 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 01:40:58,573 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 01:40:58,573 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 01:40:58,573 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 01:40:58,582 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:40:58" (1/1) ... [2022-11-03 01:40:58,582 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:40:58" (1/1) ... [2022-11-03 01:40:58,585 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:40:58" (1/1) ... [2022-11-03 01:40:58,585 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:40:58" (1/1) ... [2022-11-03 01:40:58,589 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:40:58" (1/1) ... [2022-11-03 01:40:58,593 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:40:58" (1/1) ... [2022-11-03 01:40:58,594 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:40:58" (1/1) ... [2022-11-03 01:40:58,595 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:40:58" (1/1) ... [2022-11-03 01:40:58,597 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 01:40:58,598 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 01:40:58,598 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 01:40:58,599 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 01:40:58,600 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:40:58" (1/1) ... [2022-11-03 01:40:58,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 01:40:58,621 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5640af-f400-4c67-833b-b83a087831e7/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:40:58,635 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5640af-f400-4c67-833b-b83a087831e7/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 01:40:58,649 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5640af-f400-4c67-833b-b83a087831e7/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 01:40:58,684 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 01:40:58,684 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 01:40:58,684 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 01:40:58,685 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 01:40:58,755 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 01:40:58,756 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 01:40:58,904 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 01:40:58,988 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 01:40:58,988 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 01:40:58,991 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:40:58 BoogieIcfgContainer [2022-11-03 01:40:58,991 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 01:40:58,994 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 01:40:58,994 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 01:40:58,998 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 01:40:58,999 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 01:40:58" (1/3) ... [2022-11-03 01:40:59,000 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56e54573 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:40:58, skipping insertion in model container [2022-11-03 01:40:59,000 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:40:58" (2/3) ... [2022-11-03 01:40:59,000 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56e54573 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:40:59, skipping insertion in model container [2022-11-03 01:40:59,001 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:40:58" (3/3) ... [2022-11-03 01:40:59,002 INFO L112 eAbstractionObserver]: Analyzing ICFG parity.i [2022-11-03 01:40:59,026 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 01:40:59,027 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 01:40:59,085 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 01:40:59,092 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=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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;@135e039f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 01:40:59,093 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 01:40:59,097 INFO L276 IsEmpty]: Start isEmpty. Operand has 7 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:40:59,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-03 01:40:59,103 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:40:59,104 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-03 01:40:59,105 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:40:59,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:40:59,110 INFO L85 PathProgramCache]: Analyzing trace with hash 2284362, now seen corresponding path program 1 times [2022-11-03 01:40:59,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:40:59,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911296095] [2022-11-03 01:40:59,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:40:59,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:40:59,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 01:40:59,318 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-03 01:40:59,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 01:40:59,451 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-03 01:40:59,454 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-03 01:40:59,456 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-03 01:40:59,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 01:40:59,466 INFO L444 BasicCegarLoop]: Path program histogram: [1] [2022-11-03 01:40:59,475 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-03 01:40:59,507 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.11 01:40:59 BoogieIcfgContainer [2022-11-03 01:40:59,508 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-03 01:40:59,514 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-03 01:40:59,514 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-03 01:40:59,514 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-03 01:40:59,515 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:40:58" (3/4) ... [2022-11-03 01:40:59,520 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-11-03 01:40:59,521 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-03 01:40:59,523 INFO L158 Benchmark]: Toolchain (without parser) took 1443.26ms. Allocated memory is still 127.9MB. Free memory was 95.2MB in the beginning and 70.5MB in the end (delta: 24.6MB). Peak memory consumption was 22.1MB. Max. memory is 16.1GB. [2022-11-03 01:40:59,525 INFO L158 Benchmark]: CDTParser took 0.36ms. Allocated memory is still 83.9MB. Free memory is still 38.8MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 01:40:59,526 INFO L158 Benchmark]: CACSL2BoogieTranslator took 439.07ms. Allocated memory is still 127.9MB. Free memory was 94.8MB in the beginning and 104.9MB in the end (delta: -10.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-03 01:40:59,528 INFO L158 Benchmark]: Boogie Procedure Inliner took 46.09ms. Allocated memory is still 127.9MB. Free memory was 104.9MB in the beginning and 103.2MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-03 01:40:59,528 INFO L158 Benchmark]: Boogie Preprocessor took 24.74ms. Allocated memory is still 127.9MB. Free memory was 103.2MB in the beginning and 102.0MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-03 01:40:59,535 INFO L158 Benchmark]: RCFGBuilder took 393.28ms. Allocated memory is still 127.9MB. Free memory was 102.0MB in the beginning and 87.7MB in the end (delta: 14.3MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2022-11-03 01:40:59,536 INFO L158 Benchmark]: TraceAbstraction took 514.89ms. Allocated memory is still 127.9MB. Free memory was 87.3MB in the beginning and 71.0MB in the end (delta: 16.4MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2022-11-03 01:40:59,538 INFO L158 Benchmark]: Witness Printer took 7.70ms. Allocated memory is still 127.9MB. Free memory was 71.0MB in the beginning and 70.5MB in the end (delta: 420.4kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 01:40:59,549 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.36ms. Allocated memory is still 83.9MB. Free memory is still 38.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 439.07ms. Allocated memory is still 127.9MB. Free memory was 94.8MB in the beginning and 104.9MB in the end (delta: -10.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 46.09ms. Allocated memory is still 127.9MB. Free memory was 104.9MB in the beginning and 103.2MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 24.74ms. Allocated memory is still 127.9MB. Free memory was 103.2MB in the beginning and 102.0MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 393.28ms. Allocated memory is still 127.9MB. Free memory was 102.0MB in the beginning and 87.7MB in the end (delta: 14.3MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 514.89ms. Allocated memory is still 127.9MB. Free memory was 87.3MB in the beginning and 71.0MB in the end (delta: 16.4MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Witness Printer took 7.70ms. Allocated memory is still 127.9MB. Free memory was 71.0MB in the beginning and 70.5MB in the end (delta: 420.4kB). 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: 25]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of bitwiseAnd at line 61, overapproximation of bitwiseXOr at line 59. Possible FailurePath: [L42] unsigned int v = __VERIFIER_nondet_uint(); [L43] unsigned int v1; [L44] unsigned int v2; [L45] char parity1; [L46] char parity2; [L47] v1 = v [L48] parity1 = (char)0 VAL [parity1=0, v=0, v1=0] [L49] COND FALSE !(v1 != 0) [L57] v2 = v [L58] parity2 = (char)0 [L59] v2 = v2 ^ (v2 >> 1u) [L60] v2 = v2 ^ (v2 >> 2u) [L61] v2 = (v2 & 286331153U) * 286331153U [L62] COND FALSE !(((v2 >> 28u) & 1u) == 0) [L65] parity2 = (char)1 [L67] CALL __VERIFIER_assert(parity1 == parity2) [L24] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L25] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.4s, OverallIterations: 1, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=7occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 4 NumberOfCodeBlocks, 4 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 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 [2022-11-03 01:40:59,612 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5640af-f400-4c67-833b-b83a087831e7/bin/utaipan-7li7fVZpFI/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_7c5640af-f400-4c67-833b-b83a087831e7/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5640af-f400-4c67-833b-b83a087831e7/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5640af-f400-4c67-833b-b83a087831e7/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5640af-f400-4c67-833b-b83a087831e7/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/bitvector/parity.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5640af-f400-4c67-833b-b83a087831e7/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5640af-f400-4c67-833b-b83a087831e7/bin/utaipan-7li7fVZpFI --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash d7c1c6c2f4d5b2d24ba57b817b67aabcbf492bd9ab5f9a13bcbf3c0241dcb4b3 --- 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-5e519f3 [2022-11-03 01:41:02,289 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 01:41:02,295 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 01:41:02,341 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 01:41:02,341 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 01:41:02,347 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 01:41:02,350 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 01:41:02,356 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 01:41:02,363 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 01:41:02,365 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 01:41:02,366 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 01:41:02,369 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 01:41:02,370 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 01:41:02,378 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 01:41:02,379 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 01:41:02,380 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 01:41:02,382 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 01:41:02,385 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 01:41:02,390 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 01:41:02,394 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 01:41:02,396 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 01:41:02,404 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 01:41:02,405 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 01:41:02,406 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 01:41:02,410 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 01:41:02,410 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 01:41:02,410 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 01:41:02,411 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 01:41:02,412 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 01:41:02,413 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 01:41:02,413 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 01:41:02,414 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 01:41:02,415 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 01:41:02,420 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 01:41:02,422 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 01:41:02,422 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 01:41:02,423 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 01:41:02,424 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 01:41:02,424 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 01:41:02,426 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 01:41:02,427 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 01:41:02,428 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5640af-f400-4c67-833b-b83a087831e7/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2022-11-03 01:41:02,483 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 01:41:02,483 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 01:41:02,484 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 01:41:02,484 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 01:41:02,486 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 01:41:02,486 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 01:41:02,486 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 01:41:02,486 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 01:41:02,487 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 01:41:02,487 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 01:41:02,488 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 01:41:02,489 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 01:41:02,490 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 01:41:02,491 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 01:41:02,491 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 01:41:02,491 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 01:41:02,491 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 01:41:02,491 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 01:41:02,492 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 01:41:02,492 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-03 01:41:02,492 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-03 01:41:02,492 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-03 01:41:02,492 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 01:41:02,493 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 01:41:02,493 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 01:41:02,493 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 01:41:02,493 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 01:41:02,493 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-03 01:41:02,494 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 01:41:02,494 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 01:41:02,494 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 01:41:02,494 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 01:41:02,495 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 01:41:02,495 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-03 01:41:02,495 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-03 01:41:02,495 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 01:41:02,505 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 01:41:02,505 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-03 01:41:02,506 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_7c5640af-f400-4c67-833b-b83a087831e7/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5640af-f400-4c67-833b-b83a087831e7/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d7c1c6c2f4d5b2d24ba57b817b67aabcbf492bd9ab5f9a13bcbf3c0241dcb4b3 [2022-11-03 01:41:02,957 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 01:41:03,003 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 01:41:03,007 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 01:41:03,009 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 01:41:03,010 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 01:41:03,012 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5640af-f400-4c67-833b-b83a087831e7/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/bitvector/parity.i [2022-11-03 01:41:03,101 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5640af-f400-4c67-833b-b83a087831e7/bin/utaipan-7li7fVZpFI/data/053bc7a92/6af89be8e43c4e13a967f8aea636f258/FLAG9a03e159a [2022-11-03 01:41:03,725 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 01:41:03,725 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5640af-f400-4c67-833b-b83a087831e7/sv-benchmarks/c/bitvector/parity.i [2022-11-03 01:41:03,732 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5640af-f400-4c67-833b-b83a087831e7/bin/utaipan-7li7fVZpFI/data/053bc7a92/6af89be8e43c4e13a967f8aea636f258/FLAG9a03e159a [2022-11-03 01:41:04,080 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5640af-f400-4c67-833b-b83a087831e7/bin/utaipan-7li7fVZpFI/data/053bc7a92/6af89be8e43c4e13a967f8aea636f258 [2022-11-03 01:41:04,083 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 01:41:04,084 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 01:41:04,090 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 01:41:04,090 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 01:41:04,094 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 01:41:04,096 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:41:04" (1/1) ... [2022-11-03 01:41:04,097 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c34199 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:41:04, skipping insertion in model container [2022-11-03 01:41:04,097 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:41:04" (1/1) ... [2022-11-03 01:41:04,105 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 01:41:04,123 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 01:41:04,261 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5640af-f400-4c67-833b-b83a087831e7/sv-benchmarks/c/bitvector/parity.i[1162,1175] [2022-11-03 01:41:04,282 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:41:04,317 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 01:41:04,343 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5640af-f400-4c67-833b-b83a087831e7/sv-benchmarks/c/bitvector/parity.i[1162,1175] [2022-11-03 01:41:04,360 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:41:04,374 INFO L208 MainTranslator]: Completed translation [2022-11-03 01:41:04,374 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:41:04 WrapperNode [2022-11-03 01:41:04,375 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 01:41:04,376 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 01:41:04,376 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 01:41:04,376 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 01:41:04,383 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:41:04" (1/1) ... [2022-11-03 01:41:04,391 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:41:04" (1/1) ... [2022-11-03 01:41:04,409 INFO L138 Inliner]: procedures = 15, calls = 7, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 42 [2022-11-03 01:41:04,409 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 01:41:04,410 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 01:41:04,410 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 01:41:04,410 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 01:41:04,419 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:41:04" (1/1) ... [2022-11-03 01:41:04,419 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:41:04" (1/1) ... [2022-11-03 01:41:04,421 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:41:04" (1/1) ... [2022-11-03 01:41:04,422 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:41:04" (1/1) ... [2022-11-03 01:41:04,441 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:41:04" (1/1) ... [2022-11-03 01:41:04,445 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:41:04" (1/1) ... [2022-11-03 01:41:04,448 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:41:04" (1/1) ... [2022-11-03 01:41:04,449 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:41:04" (1/1) ... [2022-11-03 01:41:04,452 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 01:41:04,455 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 01:41:04,459 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 01:41:04,459 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 01:41:04,460 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:41:04" (1/1) ... [2022-11-03 01:41:04,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 01:41:04,481 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5640af-f400-4c67-833b-b83a087831e7/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:41:04,491 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5640af-f400-4c67-833b-b83a087831e7/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 01:41:04,494 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5640af-f400-4c67-833b-b83a087831e7/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 01:41:04,536 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 01:41:04,536 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-03 01:41:04,536 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 01:41:04,536 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 01:41:04,600 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 01:41:04,602 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 01:41:04,864 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 01:41:04,870 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 01:41:04,872 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-03 01:41:04,875 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:41:04 BoogieIcfgContainer [2022-11-03 01:41:04,876 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 01:41:04,879 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 01:41:04,880 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 01:41:04,883 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 01:41:04,883 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 01:41:04" (1/3) ... [2022-11-03 01:41:04,885 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c58a213 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:41:04, skipping insertion in model container [2022-11-03 01:41:04,885 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:41:04" (2/3) ... [2022-11-03 01:41:04,885 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c58a213 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:41:04, skipping insertion in model container [2022-11-03 01:41:04,886 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:41:04" (3/3) ... [2022-11-03 01:41:04,887 INFO L112 eAbstractionObserver]: Analyzing ICFG parity.i [2022-11-03 01:41:04,942 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 01:41:04,942 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 01:41:05,032 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 01:41:05,046 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=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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;@72d80d3d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 01:41:05,047 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 01:41:05,052 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:41:05,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-03 01:41:05,061 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:41:05,062 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:41:05,063 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:41:05,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:41:05,072 INFO L85 PathProgramCache]: Analyzing trace with hash 561227051, now seen corresponding path program 1 times [2022-11-03 01:41:05,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:41:05,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1725215305] [2022-11-03 01:41:05,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:41:05,088 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:41:05,088 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5640af-f400-4c67-833b-b83a087831e7/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:41:05,092 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5640af-f400-4c67-833b-b83a087831e7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:41:05,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5640af-f400-4c67-833b-b83a087831e7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-03 01:41:05,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:41:05,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-03 01:41:05,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:41:05,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:41:05,263 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:41:05,264 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:41:05,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1725215305] [2022-11-03 01:41:05,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1725215305] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:41:05,265 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:41:05,265 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 01:41:05,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559815729] [2022-11-03 01:41:05,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:41:05,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-03 01:41:05,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:41:05,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-03 01:41:05,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-03 01:41:05,349 INFO L87 Difference]: Start difference. First operand has 15 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:41:05,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:41:05,369 INFO L93 Difference]: Finished difference Result 25 states and 30 transitions. [2022-11-03 01:41:05,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-03 01:41:05,372 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-03 01:41:05,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:41:05,382 INFO L225 Difference]: With dead ends: 25 [2022-11-03 01:41:05,382 INFO L226 Difference]: Without dead ends: 11 [2022-11-03 01:41:05,386 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-03 01:41:05,396 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:41:05,399 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 01:41:05,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2022-11-03 01:41:05,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2022-11-03 01:41:05,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.3) internal successors, (13), 10 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:41:05,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2022-11-03 01:41:05,464 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 8 [2022-11-03 01:41:05,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:41:05,464 INFO L495 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2022-11-03 01:41:05,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:41:05,465 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2022-11-03 01:41:05,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-03 01:41:05,466 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:41:05,467 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:41:05,485 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5640af-f400-4c67-833b-b83a087831e7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-03 01:41:05,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5640af-f400-4c67-833b-b83a087831e7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:41:05,679 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:41:05,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:41:05,680 INFO L85 PathProgramCache]: Analyzing trace with hash 246306390, now seen corresponding path program 1 times [2022-11-03 01:41:05,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:41:05,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1329775042] [2022-11-03 01:41:05,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:41:05,681 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:41:05,682 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5640af-f400-4c67-833b-b83a087831e7/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:41:05,683 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5640af-f400-4c67-833b-b83a087831e7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:41:05,685 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5640af-f400-4c67-833b-b83a087831e7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-03 01:41:05,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:41:05,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 01:41:05,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:41:05,824 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:41:05,824 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:41:05,825 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:41:05,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1329775042] [2022-11-03 01:41:05,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1329775042] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:41:05,826 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:41:05,826 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 01:41:05,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019854484] [2022-11-03 01:41:05,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:41:05,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:41:05,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:41:05,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:41:05,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:41:05,829 INFO L87 Difference]: Start difference. First operand 11 states and 13 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:41:05,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:41:05,893 INFO L93 Difference]: Finished difference Result 31 states and 37 transitions. [2022-11-03 01:41:05,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 01:41:05,894 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-03 01:41:05,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:41:05,895 INFO L225 Difference]: With dead ends: 31 [2022-11-03 01:41:05,895 INFO L226 Difference]: Without dead ends: 20 [2022-11-03 01:41:05,896 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:41:05,897 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 8 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:41:05,898 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 39 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 01:41:05,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-11-03 01:41:05,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 16. [2022-11-03 01:41:05,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:41:05,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2022-11-03 01:41:05,912 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 8 [2022-11-03 01:41:05,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:41:05,914 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2022-11-03 01:41:05,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:41:05,915 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2022-11-03 01:41:05,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-03 01:41:05,917 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:41:05,917 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:41:05,938 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5640af-f400-4c67-833b-b83a087831e7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-03 01:41:06,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5640af-f400-4c67-833b-b83a087831e7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:41:06,131 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:41:06,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:41:06,133 INFO L85 PathProgramCache]: Analyzing trace with hash 246365972, now seen corresponding path program 1 times [2022-11-03 01:41:06,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:41:06,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1672268602] [2022-11-03 01:41:06,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:41:06,135 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:41:06,135 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5640af-f400-4c67-833b-b83a087831e7/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:41:06,136 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5640af-f400-4c67-833b-b83a087831e7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:41:06,143 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5640af-f400-4c67-833b-b83a087831e7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-03 01:41:06,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:41:06,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-03 01:41:06,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:41:06,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:41:06,225 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:41:06,225 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:41:06,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1672268602] [2022-11-03 01:41:06,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1672268602] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:41:06,226 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:41:06,226 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 01:41:06,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145942005] [2022-11-03 01:41:06,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:41:06,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:41:06,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:41:06,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:41:06,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:41:06,229 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:41:06,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:41:06,330 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2022-11-03 01:41:06,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 01:41:06,331 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-03 01:41:06,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:41:06,332 INFO L225 Difference]: With dead ends: 25 [2022-11-03 01:41:06,332 INFO L226 Difference]: Without dead ends: 19 [2022-11-03 01:41:06,332 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-03 01:41:06,334 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 5 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:41:06,335 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 32 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 01:41:06,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-11-03 01:41:06,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17. [2022-11-03 01:41:06,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:41:06,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2022-11-03 01:41:06,341 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 8 [2022-11-03 01:41:06,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:41:06,341 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2022-11-03 01:41:06,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:41:06,342 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2022-11-03 01:41:06,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-03 01:41:06,343 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:41:06,343 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:41:06,359 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5640af-f400-4c67-833b-b83a087831e7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-03 01:41:06,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5640af-f400-4c67-833b-b83a087831e7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:41:06,558 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:41:06,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:41:06,559 INFO L85 PathProgramCache]: Analyzing trace with hash -967615425, now seen corresponding path program 1 times [2022-11-03 01:41:06,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:41:06,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1965261866] [2022-11-03 01:41:06,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:41:06,561 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:41:06,561 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5640af-f400-4c67-833b-b83a087831e7/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:41:06,562 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5640af-f400-4c67-833b-b83a087831e7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:41:06,566 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5640af-f400-4c67-833b-b83a087831e7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-03 01:41:06,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:41:06,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 01:41:06,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:41:07,041 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:41:07,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:41:08,093 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:41:08,094 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:41:08,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1965261866] [2022-11-03 01:41:08,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1965261866] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:41:08,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1183698082] [2022-11-03 01:41:08,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:41:08,095 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:41:08,096 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5640af-f400-4c67-833b-b83a087831e7/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:41:08,099 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5640af-f400-4c67-833b-b83a087831e7/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:41:08,102 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5640af-f400-4c67-833b-b83a087831e7/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2022-11-03 01:41:08,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:41:08,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 01:41:08,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:41:08,338 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:41:08,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:41:08,558 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:41:08,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1183698082] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:41:08,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457238754] [2022-11-03 01:41:08,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:41:08,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:41:08,559 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5640af-f400-4c67-833b-b83a087831e7/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:41:08,569 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5640af-f400-4c67-833b-b83a087831e7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:41:08,602 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5640af-f400-4c67-833b-b83a087831e7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-03 01:41:08,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:41:08,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 01:41:08,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:41:08,800 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:41:08,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:41:08,995 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:41:08,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1457238754] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:41:08,996 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 01:41:08,996 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 7] total 12 [2022-11-03 01:41:08,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045161839] [2022-11-03 01:41:08,997 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 01:41:08,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-03 01:41:08,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:41:08,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-03 01:41:08,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2022-11-03 01:41:08,999 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand has 12 states, 12 states have (on average 1.5) internal successors, (18), 12 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:41:09,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:41:09,754 INFO L93 Difference]: Finished difference Result 45 states and 55 transitions. [2022-11-03 01:41:09,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-03 01:41:09,755 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.5) internal successors, (18), 12 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-03 01:41:09,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:41:09,757 INFO L225 Difference]: With dead ends: 45 [2022-11-03 01:41:09,758 INFO L226 Difference]: Without dead ends: 41 [2022-11-03 01:41:09,758 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2022-11-03 01:41:09,760 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 31 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 11 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 01:41:09,760 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 81 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 49 Invalid, 0 Unknown, 11 Unchecked, 0.5s Time] [2022-11-03 01:41:09,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-11-03 01:41:09,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 29. [2022-11-03 01:41:09,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.3571428571428572) internal successors, (38), 28 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:41:09,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 38 transitions. [2022-11-03 01:41:09,775 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 38 transitions. Word has length 11 [2022-11-03 01:41:09,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:41:09,776 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 38 transitions. [2022-11-03 01:41:09,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.5) internal successors, (18), 12 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:41:09,776 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 38 transitions. [2022-11-03 01:41:09,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-03 01:41:09,782 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:41:09,782 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:41:09,789 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5640af-f400-4c67-833b-b83a087831e7/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (6)] Forceful destruction successful, exit code 0 [2022-11-03 01:41:09,993 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5640af-f400-4c67-833b-b83a087831e7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-03 01:41:10,210 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5640af-f400-4c67-833b-b83a087831e7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-03 01:41:10,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5640af-f400-4c67-833b-b83a087831e7/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5640af-f400-4c67-833b-b83a087831e7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5640af-f400-4c67-833b-b83a087831e7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:41:10,385 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:41:10,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:41:10,386 INFO L85 PathProgramCache]: Analyzing trace with hash -967555843, now seen corresponding path program 1 times [2022-11-03 01:41:10,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:41:10,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [586219249] [2022-11-03 01:41:10,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:41:10,387 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:41:10,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5640af-f400-4c67-833b-b83a087831e7/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:41:10,388 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5640af-f400-4c67-833b-b83a087831e7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:41:10,392 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5640af-f400-4c67-833b-b83a087831e7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-03 01:41:10,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:41:10,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 01:41:10,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:41:10,453 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:41:10,453 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:41:10,453 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:41:10,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [586219249] [2022-11-03 01:41:10,453 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [586219249] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:41:10,454 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:41:10,454 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 01:41:10,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557004888] [2022-11-03 01:41:10,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:41:10,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:41:10,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:41:10,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:41:10,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:41:10,456 INFO L87 Difference]: Start difference. First operand 29 states and 38 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:41:10,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:41:10,518 INFO L93 Difference]: Finished difference Result 53 states and 65 transitions. [2022-11-03 01:41:10,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 01:41:10,519 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-03 01:41:10,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:41:10,522 INFO L225 Difference]: With dead ends: 53 [2022-11-03 01:41:10,522 INFO L226 Difference]: Without dead ends: 30 [2022-11-03 01:41:10,525 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:41:10,530 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 7 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:41:10,536 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 43 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 01:41:10,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-11-03 01:41:10,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 26. [2022-11-03 01:41:10,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.12) internal successors, (28), 25 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:41:10,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2022-11-03 01:41:10,542 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 11 [2022-11-03 01:41:10,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:41:10,548 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2022-11-03 01:41:10,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:41:10,548 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2022-11-03 01:41:10,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-03 01:41:10,549 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:41:10,549 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:41:10,563 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5640af-f400-4c67-833b-b83a087831e7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-11-03 01:41:10,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5640af-f400-4c67-833b-b83a087831e7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:41:10,762 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:41:10,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:41:10,762 INFO L85 PathProgramCache]: Analyzing trace with hash -2097060814, now seen corresponding path program 1 times [2022-11-03 01:41:10,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:41:10,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2062517606] [2022-11-03 01:41:10,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:41:10,763 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:41:10,763 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5640af-f400-4c67-833b-b83a087831e7/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:41:10,765 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5640af-f400-4c67-833b-b83a087831e7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:41:10,771 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5640af-f400-4c67-833b-b83a087831e7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-03 01:41:10,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:41:10,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 01:41:10,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:41:11,296 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:41:11,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:41:13,144 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:41:13,145 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:41:13,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2062517606] [2022-11-03 01:41:13,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2062517606] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:41:13,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1907684455] [2022-11-03 01:41:13,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:41:13,145 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:41:13,146 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5640af-f400-4c67-833b-b83a087831e7/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:41:13,147 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5640af-f400-4c67-833b-b83a087831e7/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:41:13,148 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5640af-f400-4c67-833b-b83a087831e7/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2022-11-03 01:41:13,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:41:13,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 01:41:13,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:41:13,443 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:41:13,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:41:13,783 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:41:13,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1907684455] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:41:13,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797971460] [2022-11-03 01:41:13,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:41:13,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:41:13,784 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5640af-f400-4c67-833b-b83a087831e7/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:41:13,785 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5640af-f400-4c67-833b-b83a087831e7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:41:13,786 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5640af-f400-4c67-833b-b83a087831e7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-03 01:41:13,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:41:13,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-03 01:41:13,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:41:14,224 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:41:14,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:41:14,546 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:41:14,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797971460] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:41:14,547 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 01:41:14,547 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9, 8, 8, 8] total 16 [2022-11-03 01:41:14,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441023452] [2022-11-03 01:41:14,547 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 01:41:14,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-03 01:41:14,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:41:14,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-03 01:41:14,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2022-11-03 01:41:14,549 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:41:15,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:41:15,967 INFO L93 Difference]: Finished difference Result 41 states and 42 transitions. [2022-11-03 01:41:15,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-03 01:41:15,968 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-03 01:41:15,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:41:15,970 INFO L225 Difference]: With dead ends: 41 [2022-11-03 01:41:15,970 INFO L226 Difference]: Without dead ends: 33 [2022-11-03 01:41:15,971 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2022-11-03 01:41:15,971 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 44 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 11 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-03 01:41:15,972 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 91 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 77 Invalid, 0 Unknown, 11 Unchecked, 0.7s Time] [2022-11-03 01:41:15,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-11-03 01:41:15,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 29. [2022-11-03 01:41:15,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 28 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:41:15,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2022-11-03 01:41:15,978 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 14 [2022-11-03 01:41:15,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:41:15,978 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2022-11-03 01:41:15,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:41:15,979 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2022-11-03 01:41:15,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-03 01:41:15,979 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:41:15,979 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:41:15,993 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5640af-f400-4c67-833b-b83a087831e7/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (10)] Ended with exit code 0 [2022-11-03 01:41:16,215 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5640af-f400-4c67-833b-b83a087831e7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-03 01:41:16,399 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5640af-f400-4c67-833b-b83a087831e7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-11-03 01:41:16,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5640af-f400-4c67-833b-b83a087831e7/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5640af-f400-4c67-833b-b83a087831e7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5640af-f400-4c67-833b-b83a087831e7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:41:16,591 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:41:16,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:41:16,591 INFO L85 PathProgramCache]: Analyzing trace with hash -1350338813, now seen corresponding path program 1 times [2022-11-03 01:41:16,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:41:16,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [403170611] [2022-11-03 01:41:16,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:41:16,592 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:41:16,592 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5640af-f400-4c67-833b-b83a087831e7/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:41:16,593 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5640af-f400-4c67-833b-b83a087831e7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:41:16,595 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5640af-f400-4c67-833b-b83a087831e7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-11-03 01:41:16,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:41:16,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-03 01:41:16,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:41:18,845 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:41:18,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:41:30,259 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:41:30,260 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:41:30,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [403170611] [2022-11-03 01:41:30,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [403170611] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:41:30,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [199030253] [2022-11-03 01:41:30,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:41:30,260 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:41:30,260 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5640af-f400-4c67-833b-b83a087831e7/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:41:30,265 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5640af-f400-4c67-833b-b83a087831e7/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:41:30,267 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5640af-f400-4c67-833b-b83a087831e7/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2022-11-03 01:41:30,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:41:30,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 01:41:30,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:41:36,665 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:41:36,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:41:37,599 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:41:37,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [199030253] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:41:37,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015953602] [2022-11-03 01:41:37,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:41:37,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:41:37,600 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5640af-f400-4c67-833b-b83a087831e7/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:41:37,602 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5640af-f400-4c67-833b-b83a087831e7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:41:37,604 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5640af-f400-4c67-833b-b83a087831e7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-03 01:41:38,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:41:38,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-03 01:41:38,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:41:38,935 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:41:38,935 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:41:39,834 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:41:39,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015953602] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:41:39,834 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 01:41:39,834 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11, 11, 14, 11] total 28 [2022-11-03 01:41:39,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162334133] [2022-11-03 01:41:39,835 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 01:41:39,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-03 01:41:39,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:41:39,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-03 01:41:39,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=623, Unknown=0, NotChecked=0, Total=756 [2022-11-03 01:41:39,837 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:41:42,445 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.54s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-03 01:41:45,388 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.95s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-03 01:42:07,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:42:07,142 INFO L93 Difference]: Finished difference Result 62 states and 68 transitions. [2022-11-03 01:42:07,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-03 01:42:07,145 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-11-03 01:42:07,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:42:07,146 INFO L225 Difference]: With dead ends: 62 [2022-11-03 01:42:07,146 INFO L226 Difference]: Without dead ends: 54 [2022-11-03 01:42:07,147 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 39.8s TimeCoverageRelationStatistics Valid=298, Invalid=1184, Unknown=0, NotChecked=0, Total=1482 [2022-11-03 01:42:07,148 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 113 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2022-11-03 01:42:07,149 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 132 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 182 Invalid, 0 Unknown, 2 Unchecked, 5.4s Time] [2022-11-03 01:42:07,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-11-03 01:42:07,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2022-11-03 01:42:07,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.1020408163265305) internal successors, (54), 49 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:42:07,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2022-11-03 01:42:07,162 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 23 [2022-11-03 01:42:07,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:42:07,162 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2022-11-03 01:42:07,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:42:07,163 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2022-11-03 01:42:07,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-03 01:42:07,164 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:42:07,164 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:42:07,183 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5640af-f400-4c67-833b-b83a087831e7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-11-03 01:42:07,379 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5640af-f400-4c67-833b-b83a087831e7/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2022-11-03 01:42:07,605 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5640af-f400-4c67-833b-b83a087831e7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-11-03 01:42:07,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5640af-f400-4c67-833b-b83a087831e7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5640af-f400-4c67-833b-b83a087831e7/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5640af-f400-4c67-833b-b83a087831e7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:42:07,778 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:42:07,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:42:07,779 INFO L85 PathProgramCache]: Analyzing trace with hash -671341842, now seen corresponding path program 2 times [2022-11-03 01:42:07,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:42:07,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1762302787] [2022-11-03 01:42:07,779 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 01:42:07,780 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:42:07,780 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5640af-f400-4c67-833b-b83a087831e7/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:42:07,781 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5640af-f400-4c67-833b-b83a087831e7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:42:07,804 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5640af-f400-4c67-833b-b83a087831e7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-11-03 01:42:07,965 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 01:42:07,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:42:07,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-03 01:42:07,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:42:10,884 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:42:10,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:42:37,181 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:42:37,181 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:42:37,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1762302787] [2022-11-03 01:42:37,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1762302787] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:42:37,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [247778780] [2022-11-03 01:42:37,182 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 01:42:37,182 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:42:37,182 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5640af-f400-4c67-833b-b83a087831e7/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:42:37,185 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5640af-f400-4c67-833b-b83a087831e7/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:42:37,186 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5640af-f400-4c67-833b-b83a087831e7/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2022-11-03 01:42:37,333 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 01:42:37,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:42:37,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-03 01:42:37,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:42:48,677 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:42:48,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:42:50,056 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:42:50,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [247778780] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:42:50,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089310191] [2022-11-03 01:42:50,056 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 01:42:50,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:42:50,057 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5640af-f400-4c67-833b-b83a087831e7/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:42:50,059 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5640af-f400-4c67-833b-b83a087831e7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:42:50,060 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5640af-f400-4c67-833b-b83a087831e7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-03 01:42:51,527 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 01:42:51,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:42:51,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-03 01:42:51,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:42:54,828 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:42:54,829 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:42:56,161 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:42:56,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089310191] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:42:56,161 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 01:42:56,161 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 12, 13, 12, 16, 12] total 32 [2022-11-03 01:42:56,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283778761] [2022-11-03 01:42:56,161 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 01:42:56,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-03 01:42:56,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:42:56,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-03 01:42:56,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=827, Unknown=0, NotChecked=0, Total=992 [2022-11-03 01:42:56,166 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand has 32 states, 32 states have (on average 2.03125) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:42:57,876 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-03 01:42:59,824 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.63s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-03 01:43:02,134 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-03 01:43:34,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:43:34,976 INFO L93 Difference]: Finished difference Result 61 states and 65 transitions. [2022-11-03 01:43:34,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-03 01:43:34,978 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-11-03 01:43:34,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:43:34,979 INFO L225 Difference]: With dead ends: 61 [2022-11-03 01:43:34,979 INFO L226 Difference]: Without dead ends: 53 [2022-11-03 01:43:34,980 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 433 ImplicationChecksByTransitivity, 71.5s TimeCoverageRelationStatistics Valid=323, Invalid=1395, Unknown=4, NotChecked=0, Total=1722 [2022-11-03 01:43:34,982 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 104 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 40 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 21 IncrementalHoareTripleChecker+Unchecked, 6.9s IncrementalHoareTripleChecker+Time [2022-11-03 01:43:34,982 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 175 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 216 Invalid, 1 Unknown, 21 Unchecked, 6.9s Time] [2022-11-03 01:43:34,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-11-03 01:43:34,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2022-11-03 01:43:34,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 52 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:43:34,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2022-11-03 01:43:34,995 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 26 [2022-11-03 01:43:34,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:43:34,996 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2022-11-03 01:43:34,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:43:34,996 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2022-11-03 01:43:34,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-03 01:43:34,997 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:43:34,998 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:43:35,007 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5640af-f400-4c67-833b-b83a087831e7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-11-03 01:43:35,203 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5640af-f400-4c67-833b-b83a087831e7/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (16)] Ended with exit code 0 [2022-11-03 01:43:35,429 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5640af-f400-4c67-833b-b83a087831e7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-03 01:43:35,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5640af-f400-4c67-833b-b83a087831e7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5640af-f400-4c67-833b-b83a087831e7/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5640af-f400-4c67-833b-b83a087831e7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:43:35,601 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:43:35,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:43:35,602 INFO L85 PathProgramCache]: Analyzing trace with hash -1314219381, now seen corresponding path program 2 times [2022-11-03 01:43:35,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:43:35,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1075193580] [2022-11-03 01:43:35,602 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 01:43:35,602 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:43:35,603 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5640af-f400-4c67-833b-b83a087831e7/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:43:35,603 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5640af-f400-4c67-833b-b83a087831e7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:43:35,608 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5640af-f400-4c67-833b-b83a087831e7/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-11-03 01:43:36,180 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 01:43:36,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:43:36,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-03 01:43:36,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:43:59,942 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:43:59,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:48:09,723 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:48:09,723 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:48:09,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1075193580] [2022-11-03 01:48:09,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1075193580] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:48:09,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [941260289] [2022-11-03 01:48:09,724 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 01:48:09,724 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-03 01:48:09,724 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5640af-f400-4c67-833b-b83a087831e7/bin/utaipan-7li7fVZpFI/cvc4 [2022-11-03 01:48:09,727 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5640af-f400-4c67-833b-b83a087831e7/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-03 01:48:09,728 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5640af-f400-4c67-833b-b83a087831e7/bin/utaipan-7li7fVZpFI/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2022-11-03 01:48:10,136 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 01:48:10,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:48:10,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-03 01:48:10,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:50:07,091 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:50:07,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:50:11,694 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:50:11,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [941260289] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:50:11,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354649937] [2022-11-03 01:50:11,695 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-03 01:50:11,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:50:11,695 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5640af-f400-4c67-833b-b83a087831e7/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:50:11,696 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5640af-f400-4c67-833b-b83a087831e7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:50:11,698 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5640af-f400-4c67-833b-b83a087831e7/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-03 01:50:16,264 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-03 01:50:16,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:50:16,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-03 01:50:16,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:50:32,652 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:50:32,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:50:37,280 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:50:37,280 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [354649937] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:50:37,280 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-03 01:50:37,281 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 19, 21, 19, 20, 19] total 59 [2022-11-03 01:50:37,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250930733] [2022-11-03 01:50:37,281 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-03 01:50:37,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-11-03 01:50:37,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:50:37,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-11-03 01:50:37,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=382, Invalid=2964, Unknown=76, NotChecked=0, Total=3422 [2022-11-03 01:50:37,291 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand has 59 states, 59 states have (on average 2.1186440677966103) internal successors, (125), 59 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:50:39,952 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.75s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-03 01:50:54,817 WARN L234 SmtUtils]: Spent 11.98s on a formula simplification. DAG size of input: 56 DAG size of output: 10 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 01:51:01,826 WARN L234 SmtUtils]: Spent 5.78s on a formula simplification. DAG size of input: 52 DAG size of output: 10 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 01:51:03,959 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-03 01:51:14,846 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-03 01:51:16,968 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-03 01:51:19,216 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-03 01:51:21,454 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-03 01:51:23,378 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.82s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-03 01:51:25,516 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-03 01:51:33,332 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-03 01:51:41,206 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-03 01:51:55,582 WARN L234 SmtUtils]: Spent 11.41s on a formula simplification. DAG size of input: 64 DAG size of output: 20 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 01:52:19,831 WARN L234 SmtUtils]: Spent 21.99s on a formula simplification. DAG size of input: 72 DAG size of output: 20 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 01:52:42,365 WARN L234 SmtUtils]: Spent 17.89s on a formula simplification. DAG size of input: 68 DAG size of output: 22 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 01:53:05,260 WARN L234 SmtUtils]: Spent 18.39s on a formula simplification. DAG size of input: 68 DAG size of output: 64 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 01:53:07,466 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-03 01:53:24,881 WARN L234 SmtUtils]: Spent 11.88s on a formula simplification. DAG size of input: 68 DAG size of output: 24 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 01:53:47,474 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-03 01:54:02,678 WARN L234 SmtUtils]: Spent 7.95s on a formula simplification. DAG size of input: 72 DAG size of output: 28 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 01:54:05,816 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-03 01:54:31,200 WARN L234 SmtUtils]: Spent 20.67s on a formula simplification. DAG size of input: 76 DAG size of output: 60 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 01:54:57,278 WARN L234 SmtUtils]: Spent 21.95s on a formula simplification. DAG size of input: 84 DAG size of output: 34 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 01:54:59,161 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.77s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-03 01:55:04,571 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.55s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers []