./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/systemc/token_ring.05.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e383e7a-84f0-462a-9abe-98c1e3b65fe6/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e383e7a-84f0-462a-9abe-98c1e3b65fe6/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e383e7a-84f0-462a-9abe-98c1e3b65fe6/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e383e7a-84f0-462a-9abe-98c1e3b65fe6/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/systemc/token_ring.05.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e383e7a-84f0-462a-9abe-98c1e3b65fe6/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e383e7a-84f0-462a-9abe-98c1e3b65fe6/bin/utaipan-gh47qXpMRh --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 16e147b68a860b93a665f8bd36a316225675cf186d50a72fc3242bc6ec552f78 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 06:22:38,506 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 06:22:38,508 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 06:22:38,525 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 06:22:38,526 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 06:22:38,527 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 06:22:38,528 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 06:22:38,529 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 06:22:38,531 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 06:22:38,532 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 06:22:38,533 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 06:22:38,534 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 06:22:38,534 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 06:22:38,535 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 06:22:38,536 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 06:22:38,537 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 06:22:38,538 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 06:22:38,539 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 06:22:38,542 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 06:22:38,544 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 06:22:38,546 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 06:22:38,547 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 06:22:38,548 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 06:22:38,549 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 06:22:38,552 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 06:22:38,552 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 06:22:38,552 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 06:22:38,553 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 06:22:38,553 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 06:22:38,554 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 06:22:38,554 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 06:22:38,555 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 06:22:38,556 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 06:22:38,556 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 06:22:38,557 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 06:22:38,558 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 06:22:38,558 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 06:22:38,558 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 06:22:38,559 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 06:22:38,559 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 06:22:38,560 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 06:22:38,561 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e383e7a-84f0-462a-9abe-98c1e3b65fe6/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 06:22:38,583 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 06:22:38,583 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 06:22:38,583 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 06:22:38,583 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 06:22:38,584 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 06:22:38,584 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 06:22:38,584 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 06:22:38,584 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 06:22:38,585 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 06:22:38,585 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 06:22:38,585 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 06:22:38,585 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 06:22:38,585 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 06:22:38,585 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 06:22:38,586 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 06:22:38,586 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 06:22:38,586 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 06:22:38,586 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 06:22:38,587 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 06:22:38,587 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 06:22:38,587 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 06:22:38,587 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 06:22:38,587 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 06:22:38,588 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 06:22:38,588 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 06:22:38,588 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 06:22:38,588 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 06:22:38,588 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 06:22:38,588 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 06:22:38,588 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 06:22:38,589 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 06:22:38,589 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 06:22:38,589 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 06:22:38,589 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 06:22:38,589 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 06:22:38,589 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 06:22:38,590 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 06:22:38,590 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 06:22:38,590 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 06:22:38,590 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 06:22:38,590 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 06:22:38,590 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_6e383e7a-84f0-462a-9abe-98c1e3b65fe6/bin/utaipan-gh47qXpMRh/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e383e7a-84f0-462a-9abe-98c1e3b65fe6/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 16e147b68a860b93a665f8bd36a316225675cf186d50a72fc3242bc6ec552f78 [2022-12-14 06:22:38,787 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 06:22:38,802 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 06:22:38,804 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 06:22:38,805 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 06:22:38,805 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 06:22:38,806 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e383e7a-84f0-462a-9abe-98c1e3b65fe6/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/systemc/token_ring.05.cil-2.c [2022-12-14 06:22:41,350 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 06:22:41,502 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 06:22:41,503 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e383e7a-84f0-462a-9abe-98c1e3b65fe6/sv-benchmarks/c/systemc/token_ring.05.cil-2.c [2022-12-14 06:22:41,512 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e383e7a-84f0-462a-9abe-98c1e3b65fe6/bin/utaipan-gh47qXpMRh/data/e24b009fe/28c53a6c82124c62a5934a1ef9eee0a7/FLAG6cb27d0d9 [2022-12-14 06:22:41,523 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e383e7a-84f0-462a-9abe-98c1e3b65fe6/bin/utaipan-gh47qXpMRh/data/e24b009fe/28c53a6c82124c62a5934a1ef9eee0a7 [2022-12-14 06:22:41,526 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 06:22:41,527 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 06:22:41,527 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 06:22:41,527 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 06:22:41,537 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 06:22:41,537 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 06:22:41" (1/1) ... [2022-12-14 06:22:41,538 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@53cdc17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:22:41, skipping insertion in model container [2022-12-14 06:22:41,538 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 06:22:41" (1/1) ... [2022-12-14 06:22:41,543 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 06:22:41,570 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 06:22:41,678 WARN L237 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_6e383e7a-84f0-462a-9abe-98c1e3b65fe6/sv-benchmarks/c/systemc/token_ring.05.cil-2.c[671,684] [2022-12-14 06:22:41,727 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 06:22:41,735 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 06:22:41,744 WARN L237 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_6e383e7a-84f0-462a-9abe-98c1e3b65fe6/sv-benchmarks/c/systemc/token_ring.05.cil-2.c[671,684] [2022-12-14 06:22:41,771 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 06:22:41,783 INFO L208 MainTranslator]: Completed translation [2022-12-14 06:22:41,783 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:22:41 WrapperNode [2022-12-14 06:22:41,783 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 06:22:41,784 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 06:22:41,784 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 06:22:41,784 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 06:22:41,789 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:22:41" (1/1) ... [2022-12-14 06:22:41,796 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:22:41" (1/1) ... [2022-12-14 06:22:41,815 INFO L138 Inliner]: procedures = 38, calls = 47, calls flagged for inlining = 21, calls inlined = 21, statements flattened = 452 [2022-12-14 06:22:41,816 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 06:22:41,816 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 06:22:41,816 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 06:22:41,816 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 06:22:41,823 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:22:41" (1/1) ... [2022-12-14 06:22:41,823 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:22:41" (1/1) ... [2022-12-14 06:22:41,825 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:22:41" (1/1) ... [2022-12-14 06:22:41,825 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:22:41" (1/1) ... [2022-12-14 06:22:41,830 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:22:41" (1/1) ... [2022-12-14 06:22:41,835 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:22:41" (1/1) ... [2022-12-14 06:22:41,837 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:22:41" (1/1) ... [2022-12-14 06:22:41,838 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:22:41" (1/1) ... [2022-12-14 06:22:41,841 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 06:22:41,841 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 06:22:41,841 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 06:22:41,841 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 06:22:41,842 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:22:41" (1/1) ... [2022-12-14 06:22:41,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 06:22:41,859 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e383e7a-84f0-462a-9abe-98c1e3b65fe6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:22:41,870 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e383e7a-84f0-462a-9abe-98c1e3b65fe6/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 06:22:41,872 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e383e7a-84f0-462a-9abe-98c1e3b65fe6/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 06:22:41,905 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 06:22:41,905 INFO L130 BoogieDeclarations]: Found specification of procedure error [2022-12-14 06:22:41,905 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2022-12-14 06:22:41,906 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2022-12-14 06:22:41,906 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2022-12-14 06:22:41,906 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2022-12-14 06:22:41,906 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2022-12-14 06:22:41,906 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-12-14 06:22:41,906 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-12-14 06:22:41,906 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2022-12-14 06:22:41,906 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2022-12-14 06:22:41,907 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2022-12-14 06:22:41,907 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2022-12-14 06:22:41,907 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 06:22:41,907 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2022-12-14 06:22:41,907 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2022-12-14 06:22:41,907 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 06:22:41,907 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 06:22:41,977 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 06:22:41,979 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 06:22:42,351 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 06:22:42,525 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 06:22:42,525 INFO L300 CfgBuilder]: Removed 8 assume(true) statements. [2022-12-14 06:22:42,528 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 06:22:42 BoogieIcfgContainer [2022-12-14 06:22:42,528 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 06:22:42,530 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 06:22:42,530 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 06:22:42,532 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 06:22:42,532 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 06:22:41" (1/3) ... [2022-12-14 06:22:42,533 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@374ac000 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 06:22:42, skipping insertion in model container [2022-12-14 06:22:42,533 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 06:22:41" (2/3) ... [2022-12-14 06:22:42,533 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@374ac000 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 06:22:42, skipping insertion in model container [2022-12-14 06:22:42,533 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 06:22:42" (3/3) ... [2022-12-14 06:22:42,534 INFO L112 eAbstractionObserver]: Analyzing ICFG token_ring.05.cil-2.c [2022-12-14 06:22:42,549 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 06:22:42,549 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 06:22:42,609 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 06:22:42,615 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;@6cceeb69, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 06:22:42,615 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 06:22:42,619 INFO L276 IsEmpty]: Start isEmpty. Operand has 117 states, 87 states have (on average 1.5402298850574712) internal successors, (134), 91 states have internal predecessors, (134), 21 states have call successors, (21), 7 states have call predecessors, (21), 7 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2022-12-14 06:22:42,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-12-14 06:22:42,628 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:22:42,629 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:22:42,629 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:22:42,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:22:42,634 INFO L85 PathProgramCache]: Analyzing trace with hash 165906929, now seen corresponding path program 1 times [2022-12-14 06:22:42,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:22:42,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155599437] [2022-12-14 06:22:42,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:22:42,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:22:42,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:22:42,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 06:22:42,911 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:22:42,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155599437] [2022-12-14 06:22:42,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155599437] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:22:42,912 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:22:42,913 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 06:22:42,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604663676] [2022-12-14 06:22:42,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:22:42,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 06:22:42,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:22:42,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 06:22:42,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 06:22:42,951 INFO L87 Difference]: Start difference. First operand has 117 states, 87 states have (on average 1.5402298850574712) internal successors, (134), 91 states have internal predecessors, (134), 21 states have call successors, (21), 7 states have call predecessors, (21), 7 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) Second operand has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 06:22:43,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:22:43,224 INFO L93 Difference]: Finished difference Result 328 states and 503 transitions. [2022-12-14 06:22:43,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 06:22:43,227 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 46 [2022-12-14 06:22:43,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:22:43,234 INFO L225 Difference]: With dead ends: 328 [2022-12-14 06:22:43,234 INFO L226 Difference]: Without dead ends: 212 [2022-12-14 06:22:43,237 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 06:22:43,239 INFO L413 NwaCegarLoop]: 251 mSDtfsCounter, 289 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 289 SdHoareTripleChecker+Valid, 430 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 06:22:43,240 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [289 Valid, 430 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 06:22:43,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2022-12-14 06:22:43,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 211. [2022-12-14 06:22:43,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 162 states have (on average 1.4691358024691359) internal successors, (238), 165 states have internal predecessors, (238), 36 states have call successors, (36), 13 states have call predecessors, (36), 12 states have return successors, (34), 33 states have call predecessors, (34), 34 states have call successors, (34) [2022-12-14 06:22:43,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 308 transitions. [2022-12-14 06:22:43,296 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 308 transitions. Word has length 46 [2022-12-14 06:22:43,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:22:43,297 INFO L495 AbstractCegarLoop]: Abstraction has 211 states and 308 transitions. [2022-12-14 06:22:43,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 06:22:43,297 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 308 transitions. [2022-12-14 06:22:43,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-12-14 06:22:43,301 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:22:43,301 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:22:43,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 06:22:43,302 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:22:43,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:22:43,302 INFO L85 PathProgramCache]: Analyzing trace with hash 2135333942, now seen corresponding path program 1 times [2022-12-14 06:22:43,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:22:43,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914341314] [2022-12-14 06:22:43,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:22:43,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:22:43,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:22:43,455 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-12-14 06:22:43,456 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:22:43,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914341314] [2022-12-14 06:22:43,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914341314] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:22:43,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384943233] [2022-12-14 06:22:43,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:22:43,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:22:43,457 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e383e7a-84f0-462a-9abe-98c1e3b65fe6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:22:43,458 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e383e7a-84f0-462a-9abe-98c1e3b65fe6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:22:43,459 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e383e7a-84f0-462a-9abe-98c1e3b65fe6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 06:22:43,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:22:43,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 527 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 06:22:43,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:22:43,649 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-14 06:22:43,649 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 06:22:43,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384943233] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:22:43,650 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 06:22:43,650 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2022-12-14 06:22:43,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715545095] [2022-12-14 06:22:43,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:22:43,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:22:43,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:22:43,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:22:43,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 06:22:43,653 INFO L87 Difference]: Start difference. First operand 211 states and 308 transitions. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 2 states have internal predecessors, (56), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 06:22:43,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:22:43,766 INFO L93 Difference]: Finished difference Result 616 states and 913 transitions. [2022-12-14 06:22:43,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:22:43,766 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 2 states have internal predecessors, (56), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 87 [2022-12-14 06:22:43,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:22:43,771 INFO L225 Difference]: With dead ends: 616 [2022-12-14 06:22:43,771 INFO L226 Difference]: Without dead ends: 410 [2022-12-14 06:22:43,774 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 06:22:43,775 INFO L413 NwaCegarLoop]: 183 mSDtfsCounter, 141 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:22:43,776 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 311 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:22:43,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2022-12-14 06:22:43,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 404. [2022-12-14 06:22:43,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 315 states have (on average 1.4634920634920634) internal successors, (461), 319 states have internal predecessors, (461), 64 states have call successors, (64), 25 states have call predecessors, (64), 24 states have return successors, (62), 60 states have call predecessors, (62), 62 states have call successors, (62) [2022-12-14 06:22:43,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 587 transitions. [2022-12-14 06:22:43,825 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 587 transitions. Word has length 87 [2022-12-14 06:22:43,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:22:43,826 INFO L495 AbstractCegarLoop]: Abstraction has 404 states and 587 transitions. [2022-12-14 06:22:43,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 2 states have internal predecessors, (56), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 06:22:43,826 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 587 transitions. [2022-12-14 06:22:43,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-12-14 06:22:43,830 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:22:43,830 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:22:43,837 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e383e7a-84f0-462a-9abe-98c1e3b65fe6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 06:22:44,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e383e7a-84f0-462a-9abe-98c1e3b65fe6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-12-14 06:22:44,031 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:22:44,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:22:44,032 INFO L85 PathProgramCache]: Analyzing trace with hash 597154292, now seen corresponding path program 1 times [2022-12-14 06:22:44,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:22:44,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394273240] [2022-12-14 06:22:44,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:22:44,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:22:44,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:22:44,165 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-12-14 06:22:44,166 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:22:44,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394273240] [2022-12-14 06:22:44,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394273240] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:22:44,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635893990] [2022-12-14 06:22:44,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:22:44,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:22:44,167 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e383e7a-84f0-462a-9abe-98c1e3b65fe6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:22:44,167 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e383e7a-84f0-462a-9abe-98c1e3b65fe6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:22:44,168 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e383e7a-84f0-462a-9abe-98c1e3b65fe6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 06:22:44,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:22:44,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 521 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 06:22:44,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:22:44,313 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-12-14 06:22:44,314 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 06:22:44,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [635893990] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:22:44,314 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 06:22:44,314 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2022-12-14 06:22:44,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785138492] [2022-12-14 06:22:44,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:22:44,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:22:44,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:22:44,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:22:44,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 06:22:44,316 INFO L87 Difference]: Start difference. First operand 404 states and 587 transitions. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 2 states have internal predecessors, (53), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 06:22:44,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:22:44,433 INFO L93 Difference]: Finished difference Result 1189 states and 1754 transitions. [2022-12-14 06:22:44,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:22:44,433 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 2 states have internal predecessors, (53), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 87 [2022-12-14 06:22:44,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:22:44,439 INFO L225 Difference]: With dead ends: 1189 [2022-12-14 06:22:44,439 INFO L226 Difference]: Without dead ends: 790 [2022-12-14 06:22:44,441 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 06:22:44,442 INFO L413 NwaCegarLoop]: 182 mSDtfsCounter, 144 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:22:44,442 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 310 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:22:44,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 790 states. [2022-12-14 06:22:44,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 790 to 782. [2022-12-14 06:22:44,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 782 states, 615 states have (on average 1.4552845528455285) internal successors, (895), 621 states have internal predecessors, (895), 118 states have call successors, (118), 49 states have call predecessors, (118), 48 states have return successors, (116), 112 states have call predecessors, (116), 116 states have call successors, (116) [2022-12-14 06:22:44,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 782 states to 782 states and 1129 transitions. [2022-12-14 06:22:44,480 INFO L78 Accepts]: Start accepts. Automaton has 782 states and 1129 transitions. Word has length 87 [2022-12-14 06:22:44,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:22:44,480 INFO L495 AbstractCegarLoop]: Abstraction has 782 states and 1129 transitions. [2022-12-14 06:22:44,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 2 states have internal predecessors, (53), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 06:22:44,480 INFO L276 IsEmpty]: Start isEmpty. Operand 782 states and 1129 transitions. [2022-12-14 06:22:44,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-12-14 06:22:44,482 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:22:44,483 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:22:44,489 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e383e7a-84f0-462a-9abe-98c1e3b65fe6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 06:22:44,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e383e7a-84f0-462a-9abe-98c1e3b65fe6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:22:44,684 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:22:44,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:22:44,684 INFO L85 PathProgramCache]: Analyzing trace with hash -306717834, now seen corresponding path program 1 times [2022-12-14 06:22:44,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:22:44,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531736121] [2022-12-14 06:22:44,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:22:44,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:22:44,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:22:44,755 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-12-14 06:22:44,756 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:22:44,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531736121] [2022-12-14 06:22:44,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531736121] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:22:44,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074521267] [2022-12-14 06:22:44,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:22:44,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:22:44,757 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e383e7a-84f0-462a-9abe-98c1e3b65fe6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:22:44,758 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e383e7a-84f0-462a-9abe-98c1e3b65fe6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:22:44,758 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e383e7a-84f0-462a-9abe-98c1e3b65fe6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 06:22:44,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:22:44,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 515 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 06:22:44,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:22:44,889 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 06:22:44,889 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 06:22:44,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074521267] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:22:44,889 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 06:22:44,889 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 4 [2022-12-14 06:22:44,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213945072] [2022-12-14 06:22:44,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:22:44,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:22:44,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:22:44,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:22:44,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 06:22:44,891 INFO L87 Difference]: Start difference. First operand 782 states and 1129 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 2 states have internal predecessors, (62), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 06:22:45,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:22:45,010 INFO L93 Difference]: Finished difference Result 2311 states and 3386 transitions. [2022-12-14 06:22:45,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:22:45,010 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 2 states have internal predecessors, (62), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 87 [2022-12-14 06:22:45,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:22:45,019 INFO L225 Difference]: With dead ends: 2311 [2022-12-14 06:22:45,019 INFO L226 Difference]: Without dead ends: 1534 [2022-12-14 06:22:45,022 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 06:22:45,023 INFO L413 NwaCegarLoop]: 151 mSDtfsCounter, 135 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:22:45,023 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 279 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:22:45,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1534 states. [2022-12-14 06:22:45,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1534 to 1522. [2022-12-14 06:22:45,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1522 states, 1203 states have (on average 1.4455527847049043) internal successors, (1739), 1213 states have internal predecessors, (1739), 222 states have call successors, (222), 97 states have call predecessors, (222), 96 states have return successors, (220), 212 states have call predecessors, (220), 220 states have call successors, (220) [2022-12-14 06:22:45,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1522 states to 1522 states and 2181 transitions. [2022-12-14 06:22:45,120 INFO L78 Accepts]: Start accepts. Automaton has 1522 states and 2181 transitions. Word has length 87 [2022-12-14 06:22:45,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:22:45,121 INFO L495 AbstractCegarLoop]: Abstraction has 1522 states and 2181 transitions. [2022-12-14 06:22:45,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 2 states have internal predecessors, (62), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 06:22:45,121 INFO L276 IsEmpty]: Start isEmpty. Operand 1522 states and 2181 transitions. [2022-12-14 06:22:45,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-12-14 06:22:45,125 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:22:45,125 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:22:45,130 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e383e7a-84f0-462a-9abe-98c1e3b65fe6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 06:22:45,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e383e7a-84f0-462a-9abe-98c1e3b65fe6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:22:45,326 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:22:45,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:22:45,326 INFO L85 PathProgramCache]: Analyzing trace with hash -2143174732, now seen corresponding path program 1 times [2022-12-14 06:22:45,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:22:45,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834652726] [2022-12-14 06:22:45,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:22:45,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:22:45,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:22:45,432 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-12-14 06:22:45,432 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:22:45,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834652726] [2022-12-14 06:22:45,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834652726] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:22:45,432 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:22:45,433 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 06:22:45,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384063720] [2022-12-14 06:22:45,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:22:45,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:22:45,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:22:45,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:22:45,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:22:45,434 INFO L87 Difference]: Start difference. First operand 1522 states and 2181 transitions. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-12-14 06:22:45,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:22:45,552 INFO L93 Difference]: Finished difference Result 2702 states and 3936 transitions. [2022-12-14 06:22:45,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:22:45,552 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 87 [2022-12-14 06:22:45,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:22:45,562 INFO L225 Difference]: With dead ends: 2702 [2022-12-14 06:22:45,562 INFO L226 Difference]: Without dead ends: 1914 [2022-12-14 06:22:45,565 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:22:45,565 INFO L413 NwaCegarLoop]: 206 mSDtfsCounter, 65 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 349 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 06:22:45,566 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 349 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 06:22:45,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1914 states. [2022-12-14 06:22:45,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1914 to 1766. [2022-12-14 06:22:45,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1766 states, 1431 states have (on average 1.4835779175401818) internal successors, (2123), 1441 states have internal predecessors, (2123), 230 states have call successors, (230), 105 states have call predecessors, (230), 104 states have return successors, (228), 220 states have call predecessors, (228), 228 states have call successors, (228) [2022-12-14 06:22:45,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1766 states to 1766 states and 2581 transitions. [2022-12-14 06:22:45,672 INFO L78 Accepts]: Start accepts. Automaton has 1766 states and 2581 transitions. Word has length 87 [2022-12-14 06:22:45,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:22:45,673 INFO L495 AbstractCegarLoop]: Abstraction has 1766 states and 2581 transitions. [2022-12-14 06:22:45,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-12-14 06:22:45,673 INFO L276 IsEmpty]: Start isEmpty. Operand 1766 states and 2581 transitions. [2022-12-14 06:22:45,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-12-14 06:22:45,680 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:22:45,681 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:22:45,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-14 06:22:45,681 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:22:45,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:22:45,682 INFO L85 PathProgramCache]: Analyzing trace with hash -1702882364, now seen corresponding path program 1 times [2022-12-14 06:22:45,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:22:45,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51061776] [2022-12-14 06:22:45,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:22:45,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:22:45,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:22:45,766 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-12-14 06:22:45,766 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:22:45,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51061776] [2022-12-14 06:22:45,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51061776] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:22:45,767 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:22:45,767 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 06:22:45,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452601333] [2022-12-14 06:22:45,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:22:45,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:22:45,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:22:45,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:22:45,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:22:45,768 INFO L87 Difference]: Start difference. First operand 1766 states and 2581 transitions. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 06:22:45,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:22:45,970 INFO L93 Difference]: Finished difference Result 5215 states and 7702 transitions. [2022-12-14 06:22:45,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:22:45,970 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 116 [2022-12-14 06:22:45,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:22:45,982 INFO L225 Difference]: With dead ends: 5215 [2022-12-14 06:22:45,983 INFO L226 Difference]: Without dead ends: 3454 [2022-12-14 06:22:45,986 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:22:45,987 INFO L413 NwaCegarLoop]: 153 mSDtfsCounter, 135 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:22:45,987 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 281 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:22:45,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3454 states. [2022-12-14 06:22:46,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3454 to 3426. [2022-12-14 06:22:46,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3426 states, 2779 states have (on average 1.4692335372436127) internal successors, (4083), 2797 states have internal predecessors, (4083), 438 states have call successors, (438), 209 states have call predecessors, (438), 208 states have return successors, (436), 420 states have call predecessors, (436), 436 states have call successors, (436) [2022-12-14 06:22:46,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3426 states to 3426 states and 4957 transitions. [2022-12-14 06:22:46,098 INFO L78 Accepts]: Start accepts. Automaton has 3426 states and 4957 transitions. Word has length 116 [2022-12-14 06:22:46,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:22:46,098 INFO L495 AbstractCegarLoop]: Abstraction has 3426 states and 4957 transitions. [2022-12-14 06:22:46,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 06:22:46,106 INFO L276 IsEmpty]: Start isEmpty. Operand 3426 states and 4957 transitions. [2022-12-14 06:22:46,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-12-14 06:22:46,114 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:22:46,115 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:22:46,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-14 06:22:46,115 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:22:46,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:22:46,115 INFO L85 PathProgramCache]: Analyzing trace with hash 1592631899, now seen corresponding path program 1 times [2022-12-14 06:22:46,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:22:46,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636019825] [2022-12-14 06:22:46,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:22:46,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:22:46,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:22:46,184 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-12-14 06:22:46,184 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:22:46,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636019825] [2022-12-14 06:22:46,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636019825] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:22:46,184 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:22:46,185 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 06:22:46,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34906165] [2022-12-14 06:22:46,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:22:46,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:22:46,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:22:46,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:22:46,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:22:46,186 INFO L87 Difference]: Start difference. First operand 3426 states and 4957 transitions. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 06:22:46,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:22:46,443 INFO L93 Difference]: Finished difference Result 10123 states and 14790 transitions. [2022-12-14 06:22:46,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:22:46,443 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 116 [2022-12-14 06:22:46,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:22:46,463 INFO L225 Difference]: With dead ends: 10123 [2022-12-14 06:22:46,463 INFO L226 Difference]: Without dead ends: 6702 [2022-12-14 06:22:46,473 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:22:46,473 INFO L413 NwaCegarLoop]: 167 mSDtfsCounter, 138 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:22:46,474 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 295 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:22:46,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6702 states. [2022-12-14 06:22:46,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6702 to 6650. [2022-12-14 06:22:46,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6650 states, 5395 states have (on average 1.4537534754402224) internal successors, (7843), 5429 states have internal predecessors, (7843), 838 states have call successors, (838), 417 states have call predecessors, (838), 416 states have return successors, (836), 804 states have call predecessors, (836), 836 states have call successors, (836) [2022-12-14 06:22:46,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6650 states to 6650 states and 9517 transitions. [2022-12-14 06:22:46,748 INFO L78 Accepts]: Start accepts. Automaton has 6650 states and 9517 transitions. Word has length 116 [2022-12-14 06:22:46,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:22:46,748 INFO L495 AbstractCegarLoop]: Abstraction has 6650 states and 9517 transitions. [2022-12-14 06:22:46,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 06:22:46,749 INFO L276 IsEmpty]: Start isEmpty. Operand 6650 states and 9517 transitions. [2022-12-14 06:22:46,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-12-14 06:22:46,765 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:22:46,765 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:22:46,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-14 06:22:46,765 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:22:46,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:22:46,765 INFO L85 PathProgramCache]: Analyzing trace with hash -243652476, now seen corresponding path program 1 times [2022-12-14 06:22:46,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:22:46,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522877357] [2022-12-14 06:22:46,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:22:46,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:22:46,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:22:46,830 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2022-12-14 06:22:46,830 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:22:46,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522877357] [2022-12-14 06:22:46,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522877357] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:22:46,830 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 06:22:46,831 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 06:22:46,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475352591] [2022-12-14 06:22:46,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:22:46,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:22:46,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:22:46,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:22:46,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:22:46,832 INFO L87 Difference]: Start difference. First operand 6650 states and 9517 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 06:22:47,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:22:47,218 INFO L93 Difference]: Finished difference Result 17506 states and 25491 transitions. [2022-12-14 06:22:47,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:22:47,219 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 134 [2022-12-14 06:22:47,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:22:47,256 INFO L225 Difference]: With dead ends: 17506 [2022-12-14 06:22:47,256 INFO L226 Difference]: Without dead ends: 10862 [2022-12-14 06:22:47,267 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 06:22:47,268 INFO L413 NwaCegarLoop]: 184 mSDtfsCounter, 83 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 06:22:47,268 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 325 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 06:22:47,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10862 states. [2022-12-14 06:22:47,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10862 to 9170. [2022-12-14 06:22:47,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9170 states, 7719 states have (on average 1.5140562248995983) internal successors, (11687), 7754 states have internal predecessors, (11687), 936 states have call successors, (936), 515 states have call predecessors, (936), 514 states have return successors, (934), 901 states have call predecessors, (934), 934 states have call successors, (934) [2022-12-14 06:22:47,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9170 states to 9170 states and 13557 transitions. [2022-12-14 06:22:47,712 INFO L78 Accepts]: Start accepts. Automaton has 9170 states and 13557 transitions. Word has length 134 [2022-12-14 06:22:47,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:22:47,712 INFO L495 AbstractCegarLoop]: Abstraction has 9170 states and 13557 transitions. [2022-12-14 06:22:47,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 06:22:47,713 INFO L276 IsEmpty]: Start isEmpty. Operand 9170 states and 13557 transitions. [2022-12-14 06:22:47,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-12-14 06:22:47,755 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:22:47,755 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:22:47,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-14 06:22:47,756 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:22:47,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:22:47,756 INFO L85 PathProgramCache]: Analyzing trace with hash 1965265628, now seen corresponding path program 2 times [2022-12-14 06:22:47,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:22:47,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756468556] [2022-12-14 06:22:47,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:22:47,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:22:47,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:22:47,883 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2022-12-14 06:22:47,883 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:22:47,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756468556] [2022-12-14 06:22:47,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756468556] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:22:47,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415252680] [2022-12-14 06:22:47,884 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 06:22:47,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:22:47,884 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e383e7a-84f0-462a-9abe-98c1e3b65fe6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:22:47,885 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e383e7a-84f0-462a-9abe-98c1e3b65fe6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:22:47,886 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e383e7a-84f0-462a-9abe-98c1e3b65fe6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 06:22:48,012 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 06:22:48,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 06:22:48,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 698 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 06:22:48,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:22:48,045 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 70 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-12-14 06:22:48,045 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 06:22:48,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [415252680] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:22:48,045 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 06:22:48,045 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-12-14 06:22:48,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607097819] [2022-12-14 06:22:48,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:22:48,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:22:48,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:22:48,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:22:48,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 06:22:48,048 INFO L87 Difference]: Start difference. First operand 9170 states and 13557 transitions. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 06:22:48,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:22:48,473 INFO L93 Difference]: Finished difference Result 17466 states and 26043 transitions. [2022-12-14 06:22:48,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:22:48,473 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 134 [2022-12-14 06:22:48,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:22:48,512 INFO L225 Difference]: With dead ends: 17466 [2022-12-14 06:22:48,512 INFO L226 Difference]: Without dead ends: 12790 [2022-12-14 06:22:48,522 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 06:22:48,522 INFO L413 NwaCegarLoop]: 231 mSDtfsCounter, 104 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 376 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:22:48,523 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 376 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:22:48,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12790 states. [2022-12-14 06:22:49,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12790 to 11490. [2022-12-14 06:22:49,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11490 states, 9847 states have (on average 1.5378287803391897) internal successors, (15143), 9882 states have internal predecessors, (15143), 1032 states have call successors, (1032), 611 states have call predecessors, (1032), 610 states have return successors, (1030), 997 states have call predecessors, (1030), 1030 states have call successors, (1030) [2022-12-14 06:22:49,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11490 states to 11490 states and 17205 transitions. [2022-12-14 06:22:49,107 INFO L78 Accepts]: Start accepts. Automaton has 11490 states and 17205 transitions. Word has length 134 [2022-12-14 06:22:49,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:22:49,108 INFO L495 AbstractCegarLoop]: Abstraction has 11490 states and 17205 transitions. [2022-12-14 06:22:49,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 06:22:49,108 INFO L276 IsEmpty]: Start isEmpty. Operand 11490 states and 17205 transitions. [2022-12-14 06:22:49,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-12-14 06:22:49,143 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:22:49,143 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:22:49,148 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e383e7a-84f0-462a-9abe-98c1e3b65fe6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 06:22:49,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e383e7a-84f0-462a-9abe-98c1e3b65fe6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:22:49,344 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:22:49,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:22:49,344 INFO L85 PathProgramCache]: Analyzing trace with hash -363946273, now seen corresponding path program 3 times [2022-12-14 06:22:49,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:22:49,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594047229] [2022-12-14 06:22:49,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:22:49,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:22:49,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:22:49,542 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 10 proven. 37 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-12-14 06:22:49,543 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:22:49,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594047229] [2022-12-14 06:22:49,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594047229] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:22:49,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256446779] [2022-12-14 06:22:49,543 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 06:22:49,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:22:49,543 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e383e7a-84f0-462a-9abe-98c1e3b65fe6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:22:49,544 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e383e7a-84f0-462a-9abe-98c1e3b65fe6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:22:49,545 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e383e7a-84f0-462a-9abe-98c1e3b65fe6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 06:22:49,635 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 06:22:49,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 06:22:49,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 06:22:49,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:22:49,664 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-12-14 06:22:49,664 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 06:22:49,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256446779] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:22:49,665 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 06:22:49,665 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 06:22:49,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096792435] [2022-12-14 06:22:49,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:22:49,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:22:49,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:22:49,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:22:49,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 06:22:49,666 INFO L87 Difference]: Start difference. First operand 11490 states and 17205 transitions. Second operand has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 06:22:50,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:22:50,151 INFO L93 Difference]: Finished difference Result 17386 states and 26299 transitions. [2022-12-14 06:22:50,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:22:50,151 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 134 [2022-12-14 06:22:50,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:22:50,179 INFO L225 Difference]: With dead ends: 17386 [2022-12-14 06:22:50,179 INFO L226 Difference]: Without dead ends: 11526 [2022-12-14 06:22:50,191 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 06:22:50,191 INFO L413 NwaCegarLoop]: 246 mSDtfsCounter, 141 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 377 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:22:50,191 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 377 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:22:50,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11526 states. [2022-12-14 06:22:50,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11526 to 11410. [2022-12-14 06:22:50,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11410 states, 9767 states have (on average 1.5242141906419575) internal successors, (14887), 9802 states have internal predecessors, (14887), 1032 states have call successors, (1032), 611 states have call predecessors, (1032), 610 states have return successors, (1030), 997 states have call predecessors, (1030), 1030 states have call successors, (1030) [2022-12-14 06:22:50,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11410 states to 11410 states and 16949 transitions. [2022-12-14 06:22:50,623 INFO L78 Accepts]: Start accepts. Automaton has 11410 states and 16949 transitions. Word has length 134 [2022-12-14 06:22:50,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:22:50,623 INFO L495 AbstractCegarLoop]: Abstraction has 11410 states and 16949 transitions. [2022-12-14 06:22:50,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 06:22:50,624 INFO L276 IsEmpty]: Start isEmpty. Operand 11410 states and 16949 transitions. [2022-12-14 06:22:50,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-12-14 06:22:50,652 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:22:50,652 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:22:50,657 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e383e7a-84f0-462a-9abe-98c1e3b65fe6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 06:22:50,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e383e7a-84f0-462a-9abe-98c1e3b65fe6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-14 06:22:50,853 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:22:50,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:22:50,853 INFO L85 PathProgramCache]: Analyzing trace with hash 1212611486, now seen corresponding path program 1 times [2022-12-14 06:22:50,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:22:50,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448329586] [2022-12-14 06:22:50,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:22:50,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:22:50,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:22:51,106 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 10 proven. 36 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-12-14 06:22:51,106 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:22:51,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448329586] [2022-12-14 06:22:51,106 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448329586] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:22:51,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652817474] [2022-12-14 06:22:51,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:22:51,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:22:51,107 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e383e7a-84f0-462a-9abe-98c1e3b65fe6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:22:51,107 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e383e7a-84f0-462a-9abe-98c1e3b65fe6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:22:51,108 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e383e7a-84f0-462a-9abe-98c1e3b65fe6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 06:22:51,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:22:51,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 704 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 06:22:51,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:22:51,264 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-12-14 06:22:51,264 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 06:22:51,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1652817474] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:22:51,264 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 06:22:51,264 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 06:22:51,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133513184] [2022-12-14 06:22:51,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:22:51,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:22:51,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:22:51,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:22:51,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 06:22:51,266 INFO L87 Difference]: Start difference. First operand 11410 states and 16949 transitions. Second operand has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 06:22:51,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:22:51,663 INFO L93 Difference]: Finished difference Result 18808 states and 27626 transitions. [2022-12-14 06:22:51,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:22:51,664 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 134 [2022-12-14 06:22:51,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:22:51,691 INFO L225 Difference]: With dead ends: 18808 [2022-12-14 06:22:51,691 INFO L226 Difference]: Without dead ends: 13068 [2022-12-14 06:22:51,722 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 06:22:51,723 INFO L413 NwaCegarLoop]: 156 mSDtfsCounter, 139 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 06:22:51,723 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 190 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 06:22:51,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13068 states. [2022-12-14 06:22:52,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13068 to 13068. [2022-12-14 06:22:52,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13068 states, 11237 states have (on average 1.4841149773071105) internal successors, (16677), 11272 states have internal predecessors, (16677), 1094 states have call successors, (1094), 737 states have call predecessors, (1094), 736 states have return successors, (1092), 1059 states have call predecessors, (1092), 1092 states have call successors, (1092) [2022-12-14 06:22:52,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13068 states to 13068 states and 18863 transitions. [2022-12-14 06:22:52,178 INFO L78 Accepts]: Start accepts. Automaton has 13068 states and 18863 transitions. Word has length 134 [2022-12-14 06:22:52,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:22:52,179 INFO L495 AbstractCegarLoop]: Abstraction has 13068 states and 18863 transitions. [2022-12-14 06:22:52,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 06:22:52,179 INFO L276 IsEmpty]: Start isEmpty. Operand 13068 states and 18863 transitions. [2022-12-14 06:22:52,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-12-14 06:22:52,198 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:22:52,198 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:22:52,203 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e383e7a-84f0-462a-9abe-98c1e3b65fe6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 06:22:52,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e383e7a-84f0-462a-9abe-98c1e3b65fe6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-12-14 06:22:52,399 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:22:52,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:22:52,400 INFO L85 PathProgramCache]: Analyzing trace with hash -633157532, now seen corresponding path program 1 times [2022-12-14 06:22:52,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:22:52,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832399776] [2022-12-14 06:22:52,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:22:52,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:22:52,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:22:52,611 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 10 proven. 35 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-12-14 06:22:52,611 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:22:52,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832399776] [2022-12-14 06:22:52,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832399776] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:22:52,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949289622] [2022-12-14 06:22:52,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:22:52,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:22:52,612 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e383e7a-84f0-462a-9abe-98c1e3b65fe6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:22:52,613 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e383e7a-84f0-462a-9abe-98c1e3b65fe6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:22:52,614 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e383e7a-84f0-462a-9abe-98c1e3b65fe6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 06:22:52,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:22:52,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 707 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 06:22:52,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:22:52,815 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-14 06:22:52,815 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 06:22:52,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1949289622] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:22:52,816 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 06:22:52,816 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2022-12-14 06:22:52,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317962336] [2022-12-14 06:22:52,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:22:52,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 06:22:52,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:22:52,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 06:22:52,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-12-14 06:22:52,818 INFO L87 Difference]: Start difference. First operand 13068 states and 18863 transitions. Second operand has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2022-12-14 06:22:53,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:22:53,721 INFO L93 Difference]: Finished difference Result 39046 states and 56179 transitions. [2022-12-14 06:22:53,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 06:22:53,722 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) Word has length 134 [2022-12-14 06:22:53,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:22:53,810 INFO L225 Difference]: With dead ends: 39046 [2022-12-14 06:22:53,810 INFO L226 Difference]: Without dead ends: 25984 [2022-12-14 06:22:53,824 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-12-14 06:22:53,825 INFO L413 NwaCegarLoop]: 271 mSDtfsCounter, 157 mSDsluCounter, 386 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 657 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:22:53,825 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 657 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:22:53,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25984 states. [2022-12-14 06:22:54,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25984 to 25844. [2022-12-14 06:22:54,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25844 states, 22163 states have (on average 1.4540901502504173) internal successors, (32227), 22295 states have internal predecessors, (32227), 2147 states have call successors, (2147), 1470 states have call predecessors, (2147), 1533 states have return successors, (2525), 2079 states have call predecessors, (2525), 2145 states have call successors, (2525) [2022-12-14 06:22:54,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25844 states to 25844 states and 36899 transitions. [2022-12-14 06:22:54,646 INFO L78 Accepts]: Start accepts. Automaton has 25844 states and 36899 transitions. Word has length 134 [2022-12-14 06:22:54,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:22:54,646 INFO L495 AbstractCegarLoop]: Abstraction has 25844 states and 36899 transitions. [2022-12-14 06:22:54,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.0) internal successors, (100), 4 states have internal predecessors, (100), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2022-12-14 06:22:54,646 INFO L276 IsEmpty]: Start isEmpty. Operand 25844 states and 36899 transitions. [2022-12-14 06:22:54,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-12-14 06:22:54,674 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:22:54,674 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:22:54,679 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e383e7a-84f0-462a-9abe-98c1e3b65fe6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 06:22:54,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e383e7a-84f0-462a-9abe-98c1e3b65fe6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:22:54,875 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:22:54,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:22:54,875 INFO L85 PathProgramCache]: Analyzing trace with hash 71761155, now seen corresponding path program 2 times [2022-12-14 06:22:54,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:22:54,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147169866] [2022-12-14 06:22:54,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:22:54,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:22:54,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:22:55,020 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 10 proven. 36 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-12-14 06:22:55,020 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:22:55,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147169866] [2022-12-14 06:22:55,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2147169866] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:22:55,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758036518] [2022-12-14 06:22:55,021 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 06:22:55,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:22:55,021 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e383e7a-84f0-462a-9abe-98c1e3b65fe6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:22:55,022 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e383e7a-84f0-462a-9abe-98c1e3b65fe6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:22:55,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e383e7a-84f0-462a-9abe-98c1e3b65fe6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 06:22:55,120 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-14 06:22:55,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 06:22:55,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 06:22:55,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:22:55,164 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-14 06:22:55,164 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 06:22:55,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [758036518] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:22:55,165 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 06:22:55,165 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 06:22:55,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839548030] [2022-12-14 06:22:55,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:22:55,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:22:55,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:22:55,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:22:55,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 06:22:55,166 INFO L87 Difference]: Start difference. First operand 25844 states and 36899 transitions. Second operand has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 06:22:56,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:22:56,632 INFO L93 Difference]: Finished difference Result 51742 states and 75387 transitions. [2022-12-14 06:22:56,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:22:56,633 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 134 [2022-12-14 06:22:56,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:22:56,705 INFO L225 Difference]: With dead ends: 51742 [2022-12-14 06:22:56,705 INFO L226 Difference]: Without dead ends: 38256 [2022-12-14 06:22:56,728 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 06:22:56,729 INFO L413 NwaCegarLoop]: 171 mSDtfsCounter, 132 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:22:56,729 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 298 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:22:56,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38256 states. [2022-12-14 06:22:57,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38256 to 37896. [2022-12-14 06:22:57,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37896 states, 32431 states have (on average 1.4519132928371004) internal successors, (47087), 32595 states have internal predecessors, (47087), 3199 states have call successors, (3199), 2202 states have call predecessors, (3199), 2265 states have return successors, (4053), 3099 states have call predecessors, (4053), 3197 states have call successors, (4053) [2022-12-14 06:22:57,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37896 states to 37896 states and 54339 transitions. [2022-12-14 06:22:57,960 INFO L78 Accepts]: Start accepts. Automaton has 37896 states and 54339 transitions. Word has length 134 [2022-12-14 06:22:57,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:22:57,961 INFO L495 AbstractCegarLoop]: Abstraction has 37896 states and 54339 transitions. [2022-12-14 06:22:57,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 06:22:57,961 INFO L276 IsEmpty]: Start isEmpty. Operand 37896 states and 54339 transitions. [2022-12-14 06:22:58,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-12-14 06:22:58,010 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:22:58,011 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:22:58,016 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e383e7a-84f0-462a-9abe-98c1e3b65fe6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-12-14 06:22:58,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e383e7a-84f0-462a-9abe-98c1e3b65fe6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:22:58,211 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:22:58,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:22:58,212 INFO L85 PathProgramCache]: Analyzing trace with hash 416551327, now seen corresponding path program 3 times [2022-12-14 06:22:58,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:22:58,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829824525] [2022-12-14 06:22:58,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:22:58,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:22:58,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:22:58,356 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 10 proven. 36 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-12-14 06:22:58,356 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:22:58,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829824525] [2022-12-14 06:22:58,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829824525] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:22:58,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121607015] [2022-12-14 06:22:58,356 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 06:22:58,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:22:58,356 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e383e7a-84f0-462a-9abe-98c1e3b65fe6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:22:58,357 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e383e7a-84f0-462a-9abe-98c1e3b65fe6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:22:58,358 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e383e7a-84f0-462a-9abe-98c1e3b65fe6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 06:22:58,449 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 06:22:58,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 06:22:58,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 06:22:58,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:22:58,502 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 77 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 06:22:58,502 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 06:22:58,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121607015] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:22:58,502 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 06:22:58,502 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 06:22:58,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907870873] [2022-12-14 06:22:58,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:22:58,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:22:58,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:22:58,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:22:58,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 06:22:58,504 INFO L87 Difference]: Start difference. First operand 37896 states and 54339 transitions. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 06:23:00,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:23:00,111 INFO L93 Difference]: Finished difference Result 65590 states and 94520 transitions. [2022-12-14 06:23:00,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:23:00,111 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 134 [2022-12-14 06:23:00,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:23:00,213 INFO L225 Difference]: With dead ends: 65590 [2022-12-14 06:23:00,214 INFO L226 Difference]: Without dead ends: 43186 [2022-12-14 06:23:00,252 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 06:23:00,253 INFO L413 NwaCegarLoop]: 162 mSDtfsCounter, 115 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 06:23:00,253 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 203 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 06:23:00,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43186 states. [2022-12-14 06:23:01,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43186 to 42938. [2022-12-14 06:23:01,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42938 states, 37077 states have (on average 1.4159991369312512) internal successors, (52501), 37273 states have internal predecessors, (52501), 3285 states have call successors, (3285), 2480 states have call predecessors, (3285), 2575 states have return successors, (4507), 3185 states have call predecessors, (4507), 3283 states have call successors, (4507) [2022-12-14 06:23:01,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42938 states to 42938 states and 60293 transitions. [2022-12-14 06:23:01,992 INFO L78 Accepts]: Start accepts. Automaton has 42938 states and 60293 transitions. Word has length 134 [2022-12-14 06:23:01,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:23:01,993 INFO L495 AbstractCegarLoop]: Abstraction has 42938 states and 60293 transitions. [2022-12-14 06:23:01,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 06:23:01,993 INFO L276 IsEmpty]: Start isEmpty. Operand 42938 states and 60293 transitions. [2022-12-14 06:23:02,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-12-14 06:23:02,046 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:23:02,046 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:23:02,051 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e383e7a-84f0-462a-9abe-98c1e3b65fe6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-14 06:23:02,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e383e7a-84f0-462a-9abe-98c1e3b65fe6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-14 06:23:02,247 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:23:02,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:23:02,248 INFO L85 PathProgramCache]: Analyzing trace with hash -1698585025, now seen corresponding path program 1 times [2022-12-14 06:23:02,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:23:02,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51594585] [2022-12-14 06:23:02,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:23:02,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:23:02,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:23:02,405 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 10 proven. 38 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-12-14 06:23:02,405 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:23:02,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51594585] [2022-12-14 06:23:02,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51594585] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:23:02,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436579832] [2022-12-14 06:23:02,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:23:02,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:23:02,406 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e383e7a-84f0-462a-9abe-98c1e3b65fe6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:23:02,407 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e383e7a-84f0-462a-9abe-98c1e3b65fe6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:23:02,408 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e383e7a-84f0-462a-9abe-98c1e3b65fe6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-14 06:23:02,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:23:02,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 698 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 06:23:02,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:23:02,556 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 85 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-14 06:23:02,556 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 06:23:02,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436579832] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:23:02,556 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 06:23:02,556 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 06:23:02,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072315281] [2022-12-14 06:23:02,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:23:02,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:23:02,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:23:02,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:23:02,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 06:23:02,558 INFO L87 Difference]: Start difference. First operand 42938 states and 60293 transitions. Second operand has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 06:23:04,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:23:04,009 INFO L93 Difference]: Finished difference Result 67922 states and 97459 transitions. [2022-12-14 06:23:04,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:23:04,009 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 134 [2022-12-14 06:23:04,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:23:04,096 INFO L225 Difference]: With dead ends: 67922 [2022-12-14 06:23:04,096 INFO L226 Difference]: Without dead ends: 42926 [2022-12-14 06:23:04,136 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 06:23:04,136 INFO L413 NwaCegarLoop]: 250 mSDtfsCounter, 125 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 380 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:23:04,137 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 380 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:23:04,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42926 states. [2022-12-14 06:23:06,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42926 to 42442. [2022-12-14 06:23:06,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42442 states, 36581 states have (on average 1.3967086739017522) internal successors, (51093), 36777 states have internal predecessors, (51093), 3285 states have call successors, (3285), 2480 states have call predecessors, (3285), 2575 states have return successors, (4507), 3185 states have call predecessors, (4507), 3283 states have call successors, (4507) [2022-12-14 06:23:06,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42442 states to 42442 states and 58885 transitions. [2022-12-14 06:23:06,245 INFO L78 Accepts]: Start accepts. Automaton has 42442 states and 58885 transitions. Word has length 134 [2022-12-14 06:23:06,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:23:06,245 INFO L495 AbstractCegarLoop]: Abstraction has 42442 states and 58885 transitions. [2022-12-14 06:23:06,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 06:23:06,245 INFO L276 IsEmpty]: Start isEmpty. Operand 42442 states and 58885 transitions. [2022-12-14 06:23:06,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-12-14 06:23:06,314 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:23:06,314 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:23:06,319 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e383e7a-84f0-462a-9abe-98c1e3b65fe6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-12-14 06:23:06,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e383e7a-84f0-462a-9abe-98c1e3b65fe6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-14 06:23:06,515 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:23:06,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:23:06,517 INFO L85 PathProgramCache]: Analyzing trace with hash 1517373312, now seen corresponding path program 1 times [2022-12-14 06:23:06,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:23:06,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173158199] [2022-12-14 06:23:06,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:23:06,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:23:06,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:23:06,633 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 23 proven. 2 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2022-12-14 06:23:06,634 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:23:06,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173158199] [2022-12-14 06:23:06,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173158199] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:23:06,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840873070] [2022-12-14 06:23:06,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:23:06,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:23:06,635 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e383e7a-84f0-462a-9abe-98c1e3b65fe6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:23:06,635 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e383e7a-84f0-462a-9abe-98c1e3b65fe6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:23:06,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e383e7a-84f0-462a-9abe-98c1e3b65fe6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-14 06:23:06,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:23:06,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 684 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 06:23:06,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:23:06,789 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 70 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-12-14 06:23:06,790 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 06:23:06,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840873070] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:23:06,790 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 06:23:06,790 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-12-14 06:23:06,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43656847] [2022-12-14 06:23:06,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:23:06,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:23:06,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:23:06,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:23:06,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 06:23:06,792 INFO L87 Difference]: Start difference. First operand 42442 states and 58885 transitions. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 06:23:08,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:23:08,580 INFO L93 Difference]: Finished difference Result 76664 states and 107625 transitions. [2022-12-14 06:23:08,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:23:08,581 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 131 [2022-12-14 06:23:08,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:23:08,677 INFO L225 Difference]: With dead ends: 76664 [2022-12-14 06:23:08,677 INFO L226 Difference]: Without dead ends: 47656 [2022-12-14 06:23:08,714 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 06:23:08,715 INFO L413 NwaCegarLoop]: 214 mSDtfsCounter, 85 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 358 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:23:08,715 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 358 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:23:08,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47656 states. [2022-12-14 06:23:10,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47656 to 45586. [2022-12-14 06:23:10,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45586 states, 39437 states have (on average 1.4099703324289372) internal successors, (55605), 39633 states have internal predecessors, (55605), 3429 states have call successors, (3429), 2624 states have call predecessors, (3429), 2719 states have return successors, (4651), 3329 states have call predecessors, (4651), 3427 states have call successors, (4651) [2022-12-14 06:23:10,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45586 states to 45586 states and 63685 transitions. [2022-12-14 06:23:10,377 INFO L78 Accepts]: Start accepts. Automaton has 45586 states and 63685 transitions. Word has length 131 [2022-12-14 06:23:10,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:23:10,377 INFO L495 AbstractCegarLoop]: Abstraction has 45586 states and 63685 transitions. [2022-12-14 06:23:10,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 06:23:10,377 INFO L276 IsEmpty]: Start isEmpty. Operand 45586 states and 63685 transitions. [2022-12-14 06:23:10,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-12-14 06:23:10,429 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:23:10,430 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:23:10,435 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e383e7a-84f0-462a-9abe-98c1e3b65fe6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-12-14 06:23:10,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e383e7a-84f0-462a-9abe-98c1e3b65fe6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:23:10,631 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:23:10,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:23:10,632 INFO L85 PathProgramCache]: Analyzing trace with hash 1878203379, now seen corresponding path program 1 times [2022-12-14 06:23:10,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:23:10,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866024556] [2022-12-14 06:23:10,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:23:10,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:23:10,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:23:10,696 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 22 proven. 3 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2022-12-14 06:23:10,696 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:23:10,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866024556] [2022-12-14 06:23:10,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866024556] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:23:10,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298182388] [2022-12-14 06:23:10,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:23:10,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:23:10,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e383e7a-84f0-462a-9abe-98c1e3b65fe6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:23:10,698 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e383e7a-84f0-462a-9abe-98c1e3b65fe6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:23:10,698 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e383e7a-84f0-462a-9abe-98c1e3b65fe6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-14 06:23:10,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:23:10,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 684 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 06:23:10,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:23:10,837 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 70 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-12-14 06:23:10,837 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 06:23:10,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298182388] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:23:10,837 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 06:23:10,838 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-12-14 06:23:10,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113296933] [2022-12-14 06:23:10,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:23:10,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:23:10,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:23:10,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:23:10,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 06:23:10,839 INFO L87 Difference]: Start difference. First operand 45586 states and 63685 transitions. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 06:23:12,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:23:12,732 INFO L93 Difference]: Finished difference Result 85136 states and 120657 transitions. [2022-12-14 06:23:12,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:23:12,733 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 131 [2022-12-14 06:23:12,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:23:12,854 INFO L225 Difference]: With dead ends: 85136 [2022-12-14 06:23:12,854 INFO L226 Difference]: Without dead ends: 61804 [2022-12-14 06:23:12,888 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 06:23:12,888 INFO L413 NwaCegarLoop]: 230 mSDtfsCounter, 91 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:23:12,889 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 374 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:23:12,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61804 states. [2022-12-14 06:23:15,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61804 to 55402. [2022-12-14 06:23:15,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55402 states, 48245 states have (on average 1.4321276816250388) internal successors, (69093), 48441 states have internal predecessors, (69093), 3933 states have call successors, (3933), 3128 states have call predecessors, (3933), 3223 states have return successors, (5155), 3833 states have call predecessors, (5155), 3931 states have call successors, (5155) [2022-12-14 06:23:15,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55402 states to 55402 states and 78181 transitions. [2022-12-14 06:23:15,188 INFO L78 Accepts]: Start accepts. Automaton has 55402 states and 78181 transitions. Word has length 131 [2022-12-14 06:23:15,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:23:15,188 INFO L495 AbstractCegarLoop]: Abstraction has 55402 states and 78181 transitions. [2022-12-14 06:23:15,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 06:23:15,189 INFO L276 IsEmpty]: Start isEmpty. Operand 55402 states and 78181 transitions. [2022-12-14 06:23:15,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-12-14 06:23:15,248 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:23:15,248 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:23:15,253 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e383e7a-84f0-462a-9abe-98c1e3b65fe6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-14 06:23:15,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e383e7a-84f0-462a-9abe-98c1e3b65fe6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-14 06:23:15,450 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:23:15,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:23:15,451 INFO L85 PathProgramCache]: Analyzing trace with hash 540893743, now seen corresponding path program 1 times [2022-12-14 06:23:15,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:23:15,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049190813] [2022-12-14 06:23:15,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:23:15,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:23:15,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:23:15,523 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 21 proven. 4 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-12-14 06:23:15,524 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:23:15,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049190813] [2022-12-14 06:23:15,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049190813] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:23:15,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506932226] [2022-12-14 06:23:15,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:23:15,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:23:15,524 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e383e7a-84f0-462a-9abe-98c1e3b65fe6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:23:15,525 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e383e7a-84f0-462a-9abe-98c1e3b65fe6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:23:15,526 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e383e7a-84f0-462a-9abe-98c1e3b65fe6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-14 06:23:15,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:23:15,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 681 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 06:23:15,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:23:15,646 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 72 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-12-14 06:23:15,646 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 06:23:15,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506932226] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 06:23:15,646 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 06:23:15,646 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-12-14 06:23:15,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443347899] [2022-12-14 06:23:15,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 06:23:15,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 06:23:15,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 06:23:15,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 06:23:15,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 06:23:15,648 INFO L87 Difference]: Start difference. First operand 55402 states and 78181 transitions. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 06:23:18,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 06:23:18,387 INFO L93 Difference]: Finished difference Result 106131 states and 151584 transitions. [2022-12-14 06:23:18,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 06:23:18,387 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 131 [2022-12-14 06:23:18,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 06:23:18,537 INFO L225 Difference]: With dead ends: 106131 [2022-12-14 06:23:18,537 INFO L226 Difference]: Without dead ends: 77273 [2022-12-14 06:23:18,580 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 06:23:18,581 INFO L413 NwaCegarLoop]: 235 mSDtfsCounter, 97 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 379 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 06:23:18,581 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 379 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 06:23:18,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77273 states. [2022-12-14 06:23:20,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77273 to 69622. [2022-12-14 06:23:20,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69622 states, 60953 states have (on average 1.4489360654930847) internal successors, (88317), 61149 states have internal predecessors, (88317), 4689 states have call successors, (4689), 3884 states have call predecessors, (4689), 3979 states have return successors, (5911), 4589 states have call predecessors, (5911), 4687 states have call successors, (5911) [2022-12-14 06:23:21,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69622 states to 69622 states and 98917 transitions. [2022-12-14 06:23:21,127 INFO L78 Accepts]: Start accepts. Automaton has 69622 states and 98917 transitions. Word has length 131 [2022-12-14 06:23:21,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 06:23:21,128 INFO L495 AbstractCegarLoop]: Abstraction has 69622 states and 98917 transitions. [2022-12-14 06:23:21,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 06:23:21,128 INFO L276 IsEmpty]: Start isEmpty. Operand 69622 states and 98917 transitions. [2022-12-14 06:23:21,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-12-14 06:23:21,203 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 06:23:21,203 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 06:23:21,208 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e383e7a-84f0-462a-9abe-98c1e3b65fe6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-12-14 06:23:21,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e383e7a-84f0-462a-9abe-98c1e3b65fe6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-14 06:23:21,404 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 06:23:21,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 06:23:21,406 INFO L85 PathProgramCache]: Analyzing trace with hash -528641717, now seen corresponding path program 2 times [2022-12-14 06:23:21,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 06:23:21,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839916800] [2022-12-14 06:23:21,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 06:23:21,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 06:23:21,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 06:23:21,580 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 10 proven. 37 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-12-14 06:23:21,580 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 06:23:21,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839916800] [2022-12-14 06:23:21,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839916800] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 06:23:21,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260419521] [2022-12-14 06:23:21,581 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 06:23:21,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 06:23:21,581 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e383e7a-84f0-462a-9abe-98c1e3b65fe6/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 06:23:21,582 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e383e7a-84f0-462a-9abe-98c1e3b65fe6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 06:23:21,583 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e383e7a-84f0-462a-9abe-98c1e3b65fe6/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-14 06:23:21,705 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 06:23:21,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 06:23:21,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 653 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-14 06:23:21,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 06:23:21,832 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 63 proven. 13 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-12-14 06:23:21,832 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 06:23:22,149 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 20 proven. 40 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-14 06:23:22,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [260419521] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 06:23:22,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1494992052] [2022-12-14 06:23:22,169 INFO L159 IcfgInterpreter]: Started Sifa with 67 locations of interest [2022-12-14 06:23:22,170 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 06:23:22,173 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 06:23:22,178 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 06:23:22,178 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 06:23:26,747 INFO L197 IcfgInterpreter]: Interpreting procedure error with input of size 49 for LOIs [2022-12-14 06:23:26,749 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events with input of size 124 for LOIs [2022-12-14 06:23:26,804 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2022-12-14 06:23:31,179 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 12