./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b3c995f-587a-4253-9caf-0ad4ebf3c156/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b3c995f-587a-4253-9caf-0ad4ebf3c156/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_2b3c995f-587a-4253-9caf-0ad4ebf3c156/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b3c995f-587a-4253-9caf-0ad4ebf3c156/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b3c995f-587a-4253-9caf-0ad4ebf3c156/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_2b3c995f-587a-4253-9caf-0ad4ebf3c156/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 dcec1ccd806a412efdabd457261f7c023005f550a4699f0a865a5aa2d5f9f4d9 --- 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 05:15:53,349 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 05:15:53,351 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 05:15:53,369 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 05:15:53,370 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 05:15:53,370 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 05:15:53,372 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 05:15:53,373 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 05:15:53,374 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 05:15:53,375 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 05:15:53,376 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 05:15:53,377 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 05:15:53,377 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 05:15:53,378 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 05:15:53,379 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 05:15:53,380 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 05:15:53,381 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 05:15:53,382 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 05:15:53,383 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 05:15:53,385 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 05:15:53,386 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 05:15:53,387 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 05:15:53,388 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 05:15:53,389 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 05:15:53,397 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 05:15:53,397 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 05:15:53,398 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 05:15:53,399 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 05:15:53,399 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 05:15:53,400 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 05:15:53,401 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 05:15:53,401 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 05:15:53,402 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 05:15:53,403 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 05:15:53,404 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 05:15:53,404 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 05:15:53,405 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 05:15:53,405 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 05:15:53,405 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 05:15:53,406 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 05:15:53,406 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 05:15:53,407 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b3c995f-587a-4253-9caf-0ad4ebf3c156/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 05:15:53,431 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 05:15:53,431 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 05:15:53,431 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 05:15:53,431 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 05:15:53,432 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 05:15:53,432 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 05:15:53,432 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 05:15:53,433 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 05:15:53,433 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 05:15:53,433 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 05:15:53,433 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 05:15:53,433 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 05:15:53,433 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 05:15:53,434 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 05:15:53,434 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 05:15:53,434 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 05:15:53,434 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 05:15:53,434 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 05:15:53,435 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 05:15:53,435 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 05:15:53,435 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 05:15:53,436 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 05:15:53,436 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 05:15:53,436 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 05:15:53,436 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 05:15:53,436 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 05:15:53,436 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 05:15:53,437 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 05:15:53,437 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 05:15:53,437 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 05:15:53,437 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 05:15:53,437 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 05:15:53,438 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 05:15:53,438 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 05:15:53,438 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 05:15:53,438 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 05:15:53,438 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 05:15:53,439 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 05:15:53,439 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 05:15:53,439 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 05:15:53,439 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 05:15:53,439 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_2b3c995f-587a-4253-9caf-0ad4ebf3c156/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b3c995f-587a-4253-9caf-0ad4ebf3c156/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dcec1ccd806a412efdabd457261f7c023005f550a4699f0a865a5aa2d5f9f4d9 [2022-12-14 05:15:53,622 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 05:15:53,640 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 05:15:53,642 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 05:15:53,643 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 05:15:53,643 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 05:15:53,644 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b3c995f-587a-4253-9caf-0ad4ebf3c156/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2022-12-14 05:15:56,279 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 05:15:56,448 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 05:15:56,448 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b3c995f-587a-4253-9caf-0ad4ebf3c156/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2022-12-14 05:15:56,457 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b3c995f-587a-4253-9caf-0ad4ebf3c156/bin/utaipan-gh47qXpMRh/data/270e49ddb/33fdd1e1ba1b4cdf826528bbffd84a30/FLAGc9c1c4c1d [2022-12-14 05:15:56,468 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b3c995f-587a-4253-9caf-0ad4ebf3c156/bin/utaipan-gh47qXpMRh/data/270e49ddb/33fdd1e1ba1b4cdf826528bbffd84a30 [2022-12-14 05:15:56,470 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 05:15:56,472 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 05:15:56,473 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 05:15:56,473 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 05:15:56,475 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 05:15:56,476 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 05:15:56" (1/1) ... [2022-12-14 05:15:56,476 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@27d9e166 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:15:56, skipping insertion in model container [2022-12-14 05:15:56,477 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 05:15:56" (1/1) ... [2022-12-14 05:15:56,482 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 05:15:56,512 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 05:15:56,666 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_2b3c995f-587a-4253-9caf-0ad4ebf3c156/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[5375,5388] [2022-12-14 05:15:56,683 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 05:15:56,693 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 05:15:56,717 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_2b3c995f-587a-4253-9caf-0ad4ebf3c156/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[5375,5388] [2022-12-14 05:15:56,728 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 05:15:56,741 INFO L208 MainTranslator]: Completed translation [2022-12-14 05:15:56,741 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:15:56 WrapperNode [2022-12-14 05:15:56,741 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 05:15:56,742 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 05:15:56,742 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 05:15:56,742 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 05:15:56,748 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:15:56" (1/1) ... [2022-12-14 05:15:56,754 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:15:56" (1/1) ... [2022-12-14 05:15:56,772 INFO L138 Inliner]: procedures = 24, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 422 [2022-12-14 05:15:56,772 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 05:15:56,773 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 05:15:56,773 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 05:15:56,773 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 05:15:56,779 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:15:56" (1/1) ... [2022-12-14 05:15:56,779 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:15:56" (1/1) ... [2022-12-14 05:15:56,781 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:15:56" (1/1) ... [2022-12-14 05:15:56,781 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:15:56" (1/1) ... [2022-12-14 05:15:56,785 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:15:56" (1/1) ... [2022-12-14 05:15:56,787 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:15:56" (1/1) ... [2022-12-14 05:15:56,789 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:15:56" (1/1) ... [2022-12-14 05:15:56,790 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:15:56" (1/1) ... [2022-12-14 05:15:56,792 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 05:15:56,792 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 05:15:56,792 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 05:15:56,792 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 05:15:56,793 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:15:56" (1/1) ... [2022-12-14 05:15:56,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 05:15:56,806 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b3c995f-587a-4253-9caf-0ad4ebf3c156/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:15:56,817 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b3c995f-587a-4253-9caf-0ad4ebf3c156/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 05:15:56,819 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b3c995f-587a-4253-9caf-0ad4ebf3c156/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 05:15:56,860 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 05:15:56,861 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 05:15:56,861 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 05:15:56,861 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 05:15:56,949 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 05:15:56,951 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 05:15:57,302 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 05:15:57,416 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 05:15:57,416 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-12-14 05:15:57,418 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 05:15:57 BoogieIcfgContainer [2022-12-14 05:15:57,418 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 05:15:57,420 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 05:15:57,420 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 05:15:57,422 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 05:15:57,422 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 05:15:56" (1/3) ... [2022-12-14 05:15:57,423 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41c9378a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 05:15:57, skipping insertion in model container [2022-12-14 05:15:57,423 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:15:56" (2/3) ... [2022-12-14 05:15:57,423 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41c9378a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 05:15:57, skipping insertion in model container [2022-12-14 05:15:57,424 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 05:15:57" (3/3) ... [2022-12-14 05:15:57,425 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.4.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2022-12-14 05:15:57,441 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 05:15:57,441 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 05:15:57,486 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 05:15:57,491 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;@4821c980, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 05:15:57,492 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 05:15:57,495 INFO L276 IsEmpty]: Start isEmpty. Operand has 84 states, 82 states have (on average 1.670731707317073) internal successors, (137), 83 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:15:57,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-12-14 05:15:57,503 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:15:57,503 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] [2022-12-14 05:15:57,504 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:15:57,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:15:57,509 INFO L85 PathProgramCache]: Analyzing trace with hash -2023666919, now seen corresponding path program 1 times [2022-12-14 05:15:57,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:15:57,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252707757] [2022-12-14 05:15:57,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:15:57,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:15:57,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:15:57,779 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 05:15:57,780 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:15:57,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252707757] [2022-12-14 05:15:57,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252707757] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:15:57,781 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:15:57,781 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 05:15:57,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507035052] [2022-12-14 05:15:57,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:15:57,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 05:15:57,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:15:57,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 05:15:57,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 05:15:57,809 INFO L87 Difference]: Start difference. First operand has 84 states, 82 states have (on average 1.670731707317073) internal successors, (137), 83 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:15:57,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:15:57,887 INFO L93 Difference]: Finished difference Result 189 states and 292 transitions. [2022-12-14 05:15:57,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 05:15:57,889 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-12-14 05:15:57,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:15:57,898 INFO L225 Difference]: With dead ends: 189 [2022-12-14 05:15:57,898 INFO L226 Difference]: Without dead ends: 127 [2022-12-14 05:15:57,901 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 05:15:57,904 INFO L413 NwaCegarLoop]: 188 mSDtfsCounter, 101 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 05:15:57,905 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 259 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 05:15:57,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-12-14 05:15:57,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 125. [2022-12-14 05:15:57,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 1.4112903225806452) internal successors, (175), 124 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:15:57,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 175 transitions. [2022-12-14 05:15:57,956 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 175 transitions. Word has length 37 [2022-12-14 05:15:57,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:15:57,956 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 175 transitions. [2022-12-14 05:15:57,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:15:57,957 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 175 transitions. [2022-12-14 05:15:57,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-12-14 05:15:57,958 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:15:57,958 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] [2022-12-14 05:15:57,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 05:15:57,958 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:15:57,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:15:57,959 INFO L85 PathProgramCache]: Analyzing trace with hash 1640261836, now seen corresponding path program 1 times [2022-12-14 05:15:57,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:15:57,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684081636] [2022-12-14 05:15:57,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:15:57,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:15:57,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:15:58,060 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 05:15:58,061 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:15:58,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684081636] [2022-12-14 05:15:58,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684081636] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:15:58,061 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:15:58,062 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 05:15:58,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492813497] [2022-12-14 05:15:58,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:15:58,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 05:15:58,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:15:58,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 05:15:58,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 05:15:58,064 INFO L87 Difference]: Start difference. First operand 125 states and 175 transitions. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:15:58,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:15:58,133 INFO L93 Difference]: Finished difference Result 301 states and 439 transitions. [2022-12-14 05:15:58,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 05:15:58,133 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-12-14 05:15:58,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:15:58,134 INFO L225 Difference]: With dead ends: 301 [2022-12-14 05:15:58,135 INFO L226 Difference]: Without dead ends: 202 [2022-12-14 05:15:58,135 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 05:15:58,137 INFO L413 NwaCegarLoop]: 144 mSDtfsCounter, 76 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 05:15:58,137 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 214 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 05:15:58,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2022-12-14 05:15:58,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 200. [2022-12-14 05:15:58,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 199 states have (on average 1.4422110552763818) internal successors, (287), 199 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:15:58,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 287 transitions. [2022-12-14 05:15:58,169 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 287 transitions. Word has length 40 [2022-12-14 05:15:58,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:15:58,169 INFO L495 AbstractCegarLoop]: Abstraction has 200 states and 287 transitions. [2022-12-14 05:15:58,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:15:58,170 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 287 transitions. [2022-12-14 05:15:58,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-12-14 05:15:58,171 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:15:58,171 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] [2022-12-14 05:15:58,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 05:15:58,171 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:15:58,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:15:58,172 INFO L85 PathProgramCache]: Analyzing trace with hash 2012514755, now seen corresponding path program 1 times [2022-12-14 05:15:58,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:15:58,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180588033] [2022-12-14 05:15:58,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:15:58,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:15:58,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:15:58,244 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 05:15:58,244 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:15:58,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180588033] [2022-12-14 05:15:58,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180588033] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:15:58,245 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:15:58,245 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 05:15:58,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559953013] [2022-12-14 05:15:58,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:15:58,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 05:15:58,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:15:58,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 05:15:58,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 05:15:58,247 INFO L87 Difference]: Start difference. First operand 200 states and 287 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:15:58,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:15:58,315 INFO L93 Difference]: Finished difference Result 504 states and 741 transitions. [2022-12-14 05:15:58,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 05:15:58,315 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-12-14 05:15:58,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:15:58,317 INFO L225 Difference]: With dead ends: 504 [2022-12-14 05:15:58,318 INFO L226 Difference]: Without dead ends: 330 [2022-12-14 05:15:58,318 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 05:15:58,319 INFO L413 NwaCegarLoop]: 125 mSDtfsCounter, 71 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 05:15:58,319 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 199 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 05:15:58,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2022-12-14 05:15:58,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 328. [2022-12-14 05:15:58,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 327 states have (on average 1.452599388379205) internal successors, (475), 327 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:15:58,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 475 transitions. [2022-12-14 05:15:58,348 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 475 transitions. Word has length 43 [2022-12-14 05:15:58,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:15:58,349 INFO L495 AbstractCegarLoop]: Abstraction has 328 states and 475 transitions. [2022-12-14 05:15:58,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:15:58,349 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 475 transitions. [2022-12-14 05:15:58,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-12-14 05:15:58,349 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:15:58,349 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 05:15:58,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 05:15:58,350 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:15:58,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:15:58,350 INFO L85 PathProgramCache]: Analyzing trace with hash 125802477, now seen corresponding path program 1 times [2022-12-14 05:15:58,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:15:58,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553410041] [2022-12-14 05:15:58,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:15:58,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:15:58,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:15:58,391 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 05:15:58,392 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:15:58,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553410041] [2022-12-14 05:15:58,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553410041] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:15:58,392 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:15:58,392 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 05:15:58,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288950658] [2022-12-14 05:15:58,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:15:58,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 05:15:58,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:15:58,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 05:15:58,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 05:15:58,393 INFO L87 Difference]: Start difference. First operand 328 states and 475 transitions. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:15:58,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:15:58,466 INFO L93 Difference]: Finished difference Result 844 states and 1237 transitions. [2022-12-14 05:15:58,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 05:15:58,467 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2022-12-14 05:15:58,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:15:58,468 INFO L225 Difference]: With dead ends: 844 [2022-12-14 05:15:58,468 INFO L226 Difference]: Without dead ends: 542 [2022-12-14 05:15:58,469 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 05:15:58,470 INFO L413 NwaCegarLoop]: 106 mSDtfsCounter, 66 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 05:15:58,470 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 184 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 05:15:58,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2022-12-14 05:15:58,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 540. [2022-12-14 05:15:58,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 540 states, 539 states have (on average 1.4452690166975881) internal successors, (779), 539 states have internal predecessors, (779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:15:58,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 779 transitions. [2022-12-14 05:15:58,522 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 779 transitions. Word has length 46 [2022-12-14 05:15:58,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:15:58,522 INFO L495 AbstractCegarLoop]: Abstraction has 540 states and 779 transitions. [2022-12-14 05:15:58,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:15:58,522 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 779 transitions. [2022-12-14 05:15:58,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-12-14 05:15:58,523 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:15:58,523 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, 1, 1, 1] [2022-12-14 05:15:58,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-14 05:15:58,523 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:15:58,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:15:58,523 INFO L85 PathProgramCache]: Analyzing trace with hash 1177829407, now seen corresponding path program 1 times [2022-12-14 05:15:58,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:15:58,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071093405] [2022-12-14 05:15:58,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:15:58,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:15:58,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:15:58,654 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 05:15:58,654 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:15:58,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071093405] [2022-12-14 05:15:58,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071093405] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:15:58,655 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:15:58,655 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 05:15:58,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353319352] [2022-12-14 05:15:58,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:15:58,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 05:15:58,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:15:58,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 05:15:58,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-12-14 05:15:58,656 INFO L87 Difference]: Start difference. First operand 540 states and 779 transitions. Second operand has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:15:59,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:15:59,032 INFO L93 Difference]: Finished difference Result 2244 states and 3247 transitions. [2022-12-14 05:15:59,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 05:15:59,033 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2022-12-14 05:15:59,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:15:59,039 INFO L225 Difference]: With dead ends: 2244 [2022-12-14 05:15:59,039 INFO L226 Difference]: Without dead ends: 1730 [2022-12-14 05:15:59,040 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-12-14 05:15:59,041 INFO L413 NwaCegarLoop]: 211 mSDtfsCounter, 283 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 05:15:59,042 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [283 Valid, 395 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 05:15:59,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1730 states. [2022-12-14 05:15:59,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1730 to 1724. [2022-12-14 05:15:59,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1724 states, 1723 states have (on average 1.441091120139292) internal successors, (2483), 1723 states have internal predecessors, (2483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:15:59,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1724 states to 1724 states and 2483 transitions. [2022-12-14 05:15:59,243 INFO L78 Accepts]: Start accepts. Automaton has 1724 states and 2483 transitions. Word has length 49 [2022-12-14 05:15:59,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:15:59,244 INFO L495 AbstractCegarLoop]: Abstraction has 1724 states and 2483 transitions. [2022-12-14 05:15:59,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:15:59,244 INFO L276 IsEmpty]: Start isEmpty. Operand 1724 states and 2483 transitions. [2022-12-14 05:15:59,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-12-14 05:15:59,245 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:15:59,245 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, 1, 1, 1, 1, 1] [2022-12-14 05:15:59,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-14 05:15:59,245 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:15:59,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:15:59,245 INFO L85 PathProgramCache]: Analyzing trace with hash 1105029325, now seen corresponding path program 1 times [2022-12-14 05:15:59,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:15:59,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541327154] [2022-12-14 05:15:59,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:15:59,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:15:59,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:15:59,531 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 05:15:59,531 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:15:59,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541327154] [2022-12-14 05:15:59,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541327154] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:15:59,532 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:15:59,532 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-12-14 05:15:59,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290765825] [2022-12-14 05:15:59,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:15:59,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-14 05:15:59,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:15:59,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-14 05:15:59,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-12-14 05:15:59,533 INFO L87 Difference]: Start difference. First operand 1724 states and 2483 transitions. Second operand has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:16:00,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:16:00,357 INFO L93 Difference]: Finished difference Result 4370 states and 6402 transitions. [2022-12-14 05:16:00,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-14 05:16:00,358 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2022-12-14 05:16:00,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:16:00,367 INFO L225 Difference]: With dead ends: 4370 [2022-12-14 05:16:00,367 INFO L226 Difference]: Without dead ends: 4368 [2022-12-14 05:16:00,369 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2022-12-14 05:16:00,369 INFO L413 NwaCegarLoop]: 298 mSDtfsCounter, 909 mSDsluCounter, 842 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 909 SdHoareTripleChecker+Valid, 1140 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 05:16:00,370 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [909 Valid, 1140 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 05:16:00,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4368 states. [2022-12-14 05:16:00,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4368 to 1973. [2022-12-14 05:16:00,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1973 states, 1972 states have (on average 1.4447261663286004) internal successors, (2849), 1972 states have internal predecessors, (2849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:16:00,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1973 states to 1973 states and 2849 transitions. [2022-12-14 05:16:00,738 INFO L78 Accepts]: Start accepts. Automaton has 1973 states and 2849 transitions. Word has length 51 [2022-12-14 05:16:00,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:16:00,738 INFO L495 AbstractCegarLoop]: Abstraction has 1973 states and 2849 transitions. [2022-12-14 05:16:00,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:16:00,739 INFO L276 IsEmpty]: Start isEmpty. Operand 1973 states and 2849 transitions. [2022-12-14 05:16:00,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-12-14 05:16:00,740 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:16:00,740 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:16:00,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-14 05:16:00,740 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:16:00,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:16:00,741 INFO L85 PathProgramCache]: Analyzing trace with hash -1961993484, now seen corresponding path program 1 times [2022-12-14 05:16:00,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:16:00,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897525352] [2022-12-14 05:16:00,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:16:00,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:16:00,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:16:01,580 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:16:01,581 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:16:01,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897525352] [2022-12-14 05:16:01,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897525352] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:16:01,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059265489] [2022-12-14 05:16:01,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:16:01,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:16:01,582 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b3c995f-587a-4253-9caf-0ad4ebf3c156/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:16:01,583 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b3c995f-587a-4253-9caf-0ad4ebf3c156/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:16:01,584 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b3c995f-587a-4253-9caf-0ad4ebf3c156/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 05:16:01,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:16:01,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 60 conjunts are in the unsatisfiable core [2022-12-14 05:16:01,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:16:03,229 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:16:03,229 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:16:10,092 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:16:10,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1059265489] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:16:10,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2045062986] [2022-12-14 05:16:10,107 INFO L159 IcfgInterpreter]: Started Sifa with 52 locations of interest [2022-12-14 05:16:10,107 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 05:16:10,109 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 05:16:10,114 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 05:16:10,114 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 05:16:10,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:16:10,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:16:10,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:16:10,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:16:10,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:16:10,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:16:10,209 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 12 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 21 [2022-12-14 05:16:10,223 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 05:16:10,224 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 05:16:10,224 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 05:16:10,225 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 21 [2022-12-14 05:16:33,478 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 05:16:54,080 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '21711#(and (<= ~send3~0 127) (<= 0 ~id3~0) (= ~nomsg~0 ~p1_new~0) (<= (+ |ULTIMATE.start_main_~node4__m4~0#1| 1) 0) (= ~nomsg~0 ~p4_new~0) (<= ~__return_19080~0 1) (= ~p4~0 0) (<= ~st3~0 0) (<= 0 ~mode1~0) (<= 0 ~mode4~0) (<= 0 ~send4~0) (<= ~id4~0 127) (<= 0 (+ |ULTIMATE.start_main_~node4__m4~0#1| 1)) (<= 0 ~id1~0) (<= 0 (+ ~p4_old~0 1)) (<= 0 ~st4~0) (<= 0 (+ |ULTIMATE.start_main_~node3__m3~0#1| 1)) (<= 0 ~mode3~0) (<= ~send1~0 127) (<= ~st1~0 0) (= ~__return_19215~0 |ULTIMATE.start_main_~check__tmp~0#1|) (= ~p3_new~0 ~nomsg~0) (<= ~send4~0 127) (<= 0 (+ ~p3_old~0 1)) (<= 0 |ULTIMATE.start_main_~main__i2~0#1|) (<= |#NULL.offset| 0) (<= ~mode2~0 1) (<= 0 ~st1~0) (<= (+ ~p4_old~0 1) 0) (<= 0 ~st2~0) (= ~__return_19215~0 |ULTIMATE.start_main_~main__c1~0#1|) (<= ~p1~0 0) (<= ~__return_main~0 0) (<= ~mode3~0 1) (<= 0 ~p2~0) (<= 0 (+ |ULTIMATE.start_main_~node1__m1~0#1| 1)) (<= ~mode4~0 1) (<= 0 (+ ~p2_old~0 1)) (<= ~id1~0 127) (<= (+ ~p3_old~0 1) 0) (= ~nomsg~0 ~p2_new~0) (<= (+ |ULTIMATE.start_main_~node1__m1~0#1| 1) 0) (<= |ULTIMATE.start_main_~main__i2~0#1| 0) (<= (+ ~nomsg~0 1) 0) (<= ~mode1~0 1) (= |ULTIMATE.start_main_~assert__arg~0#1| |ULTIMATE.start_main_~__tmp_1~0#1|) (<= ~st4~0 0) (<= 1 ~__return_19080~0) (<= 0 ~id4~0) (<= 0 ~__return_main~0) (<= ~id3~0 127) (<= 0 ~id2~0) (<= 0 (+ ~nomsg~0 1)) (<= |ULTIMATE.start_main_~node1____CPAchecker_TMP_0~0#1| 127) (<= ~p2~0 0) (<= 0 ~mode2~0) (<= ~id2~0 127) (<= 0 ~st3~0) (<= |ULTIMATE.start_main_~init__tmp~0#1| 1) (<= 0 |#NULL.offset|) (= ~p3~0 0) (<= (+ ~p2_old~0 1) 0) (= (ite (= |ULTIMATE.start_main_~main__c1~0#1| 0) 0 1) |ULTIMATE.start_main_~__tmp_1~0#1|) (= (mod |ULTIMATE.start_main_~assert__arg~0#1| 256) 0) (or (and (not (= (+ ~st4~0 ~st3~0 ~st2~0 ~st1~0) 1)) (not (< (mod ~r1~0 256) 4))) (not (<= (+ ~st4~0 ~st3~0 ~st2~0 ~st1~0) 1))) (<= 0 ~send3~0) (<= 0 |ULTIMATE.start_main_~node1____CPAchecker_TMP_0~0#1|) (<= 0 ~p1~0) (<= 0 |#StackHeapBarrier|) (<= 0 ~send1~0) (<= (+ |ULTIMATE.start_main_~node3__m3~0#1| 1) 0) (<= 1 |ULTIMATE.start_main_~init__tmp~0#1|) (= |#NULL.base| 0))' at error location [2022-12-14 05:16:54,080 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 05:16:54,081 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 05:16:54,081 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 44 [2022-12-14 05:16:54,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062286425] [2022-12-14 05:16:54,081 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 05:16:54,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-12-14 05:16:54,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:16:54,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-12-14 05:16:54,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1171, Invalid=7385, Unknown=0, NotChecked=0, Total=8556 [2022-12-14 05:16:54,084 INFO L87 Difference]: Start difference. First operand 1973 states and 2849 transitions. Second operand has 44 states, 44 states have (on average 3.909090909090909) internal successors, (172), 44 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:18:31,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:18:31,690 INFO L93 Difference]: Finished difference Result 47178 states and 68760 transitions. [2022-12-14 05:18:31,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 330 states. [2022-12-14 05:18:31,690 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 3.909090909090909) internal successors, (172), 44 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2022-12-14 05:18:31,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:18:31,817 INFO L225 Difference]: With dead ends: 47178 [2022-12-14 05:18:31,817 INFO L226 Difference]: Without dead ends: 45259 [2022-12-14 05:18:31,850 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 519 GetRequests, 104 SyntacticMatches, 2 SemanticMatches, 413 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78537 ImplicationChecksByTransitivity, 92.0s TimeCoverageRelationStatistics Valid=25159, Invalid=146651, Unknown=0, NotChecked=0, Total=171810 [2022-12-14 05:18:31,851 INFO L413 NwaCegarLoop]: 254 mSDtfsCounter, 12718 mSDsluCounter, 6206 mSDsCounter, 0 mSdLazyCounter, 8043 mSolverCounterSat, 619 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12718 SdHoareTripleChecker+Valid, 6460 SdHoareTripleChecker+Invalid, 8662 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 619 IncrementalHoareTripleChecker+Valid, 8043 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.2s IncrementalHoareTripleChecker+Time [2022-12-14 05:18:31,852 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12718 Valid, 6460 Invalid, 8662 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [619 Valid, 8043 Invalid, 0 Unknown, 0 Unchecked, 12.2s Time] [2022-12-14 05:18:31,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45259 states. [2022-12-14 05:18:37,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45259 to 15420. [2022-12-14 05:18:37,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15420 states, 15419 states have (on average 1.4206498475906348) internal successors, (21905), 15419 states have internal predecessors, (21905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:18:37,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15420 states to 15420 states and 21905 transitions. [2022-12-14 05:18:37,520 INFO L78 Accepts]: Start accepts. Automaton has 15420 states and 21905 transitions. Word has length 61 [2022-12-14 05:18:37,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:18:37,520 INFO L495 AbstractCegarLoop]: Abstraction has 15420 states and 21905 transitions. [2022-12-14 05:18:37,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 3.909090909090909) internal successors, (172), 44 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:18:37,521 INFO L276 IsEmpty]: Start isEmpty. Operand 15420 states and 21905 transitions. [2022-12-14 05:18:37,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-12-14 05:18:37,522 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:18:37,522 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:18:37,527 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b3c995f-587a-4253-9caf-0ad4ebf3c156/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 05:18:37,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b3c995f-587a-4253-9caf-0ad4ebf3c156/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:18:37,724 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:18:37,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:18:37,726 INFO L85 PathProgramCache]: Analyzing trace with hash -431881859, now seen corresponding path program 1 times [2022-12-14 05:18:37,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:18:37,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639648961] [2022-12-14 05:18:37,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:18:37,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:18:37,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:18:37,846 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 05:18:37,846 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:18:37,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639648961] [2022-12-14 05:18:37,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639648961] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:18:37,847 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:18:37,847 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 05:18:37,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520060512] [2022-12-14 05:18:37,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:18:37,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 05:18:37,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:18:37,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 05:18:37,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 05:18:37,848 INFO L87 Difference]: Start difference. First operand 15420 states and 21905 transitions. Second operand has 5 states, 5 states have (on average 11.6) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:18:45,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:18:45,730 INFO L93 Difference]: Finished difference Result 37559 states and 53633 transitions. [2022-12-14 05:18:45,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 05:18:45,731 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2022-12-14 05:18:45,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:18:45,756 INFO L225 Difference]: With dead ends: 37559 [2022-12-14 05:18:45,757 INFO L226 Difference]: Without dead ends: 22295 [2022-12-14 05:18:45,768 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-12-14 05:18:45,768 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 433 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 433 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 05:18:45,768 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [433 Valid, 118 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 05:18:45,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22295 states. [2022-12-14 05:18:53,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22295 to 22293. [2022-12-14 05:18:53,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22293 states, 22292 states have (on average 1.4175937556073928) internal successors, (31601), 22292 states have internal predecessors, (31601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:18:53,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22293 states to 22293 states and 31601 transitions. [2022-12-14 05:18:53,590 INFO L78 Accepts]: Start accepts. Automaton has 22293 states and 31601 transitions. Word has length 61 [2022-12-14 05:18:53,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:18:53,590 INFO L495 AbstractCegarLoop]: Abstraction has 22293 states and 31601 transitions. [2022-12-14 05:18:53,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:18:53,590 INFO L276 IsEmpty]: Start isEmpty. Operand 22293 states and 31601 transitions. [2022-12-14 05:18:53,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-12-14 05:18:53,592 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:18:53,592 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:18:53,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-14 05:18:53,592 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:18:53,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:18:53,593 INFO L85 PathProgramCache]: Analyzing trace with hash -296120648, now seen corresponding path program 1 times [2022-12-14 05:18:53,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:18:53,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158337177] [2022-12-14 05:18:53,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:18:53,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:18:53,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:18:54,199 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:18:54,199 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:18:54,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158337177] [2022-12-14 05:18:54,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158337177] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:18:54,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369239589] [2022-12-14 05:18:54,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:18:54,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:18:54,200 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b3c995f-587a-4253-9caf-0ad4ebf3c156/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:18:54,200 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b3c995f-587a-4253-9caf-0ad4ebf3c156/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:18:54,201 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b3c995f-587a-4253-9caf-0ad4ebf3c156/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 05:18:54,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:18:54,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 56 conjunts are in the unsatisfiable core [2022-12-14 05:18:54,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:18:55,123 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:18:55,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:19:02,646 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:19:02,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369239589] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:19:02,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1575673145] [2022-12-14 05:19:02,649 INFO L159 IcfgInterpreter]: Started Sifa with 52 locations of interest [2022-12-14 05:19:02,650 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 05:19:02,650 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 05:19:02,650 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 05:19:02,650 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 05:19:02,713 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 05:19:02,713 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 05:19:02,713 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 05:19:02,714 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 21 [2022-12-14 05:19:02,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:19:02,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:19:02,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:19:02,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:19:02,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:19:02,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:19:02,731 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 12 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 21 [2022-12-14 05:19:11,454 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 05:19:31,588 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '219612#(and (<= 0 ~id3~0) (= ~nomsg~0 ~p1_new~0) (<= (+ |ULTIMATE.start_main_~node4__m4~0#1| 1) 0) (= ~nomsg~0 ~p4_new~0) (<= ~__return_19080~0 1) (= ~p4~0 0) (<= 0 ~mode4~0) (<= 0 ~send4~0) (<= 0 (+ ~p1_old~0 1)) (<= ~id4~0 127) (<= 0 (+ |ULTIMATE.start_main_~node4__m4~0#1| 1)) (<= 0 ~id1~0) (<= 0 (+ ~p4_old~0 1)) (<= 0 ~st4~0) (= ~p2~0 0) (<= |ULTIMATE.start_main_~node2____CPAchecker_TMP_0~0#1| 127) (<= ~send1~0 127) (<= ~st1~0 0) (= ~__return_19215~0 |ULTIMATE.start_main_~check__tmp~0#1|) (= ~p3_new~0 ~nomsg~0) (<= ~send4~0 127) (<= 0 (+ ~p3_old~0 1)) (<= ~mode2~0 1) (<= 0 ~st1~0) (<= (+ ~p4_old~0 1) 0) (<= 0 ~st2~0) (= ~__return_19215~0 |ULTIMATE.start_main_~main__c1~0#1|) (<= ~mode3~0 1) (<= 0 ~send2~0) (<= 0 (+ |ULTIMATE.start_main_~node1__m1~0#1| 1)) (<= ~mode4~0 1) (<= ~id1~0 127) (<= (+ ~p3_old~0 1) 0) (= ~nomsg~0 ~p2_new~0) (<= ~send2~0 127) (= |ULTIMATE.start_main_~init__tmp~0#1| 1) (<= (+ |ULTIMATE.start_main_~node1__m1~0#1| 1) 0) (<= (+ ~nomsg~0 1) 0) (<= ~mode1~0 1) (= |ULTIMATE.start_main_~assert__arg~0#1| |ULTIMATE.start_main_~__tmp_1~0#1|) (<= ~st2~0 0) (<= ~st4~0 0) (<= 0 |ULTIMATE.start_main_~node2____CPAchecker_TMP_0~0#1|) (<= 1 ~__return_19080~0) (<= 0 ~id4~0) (<= ~id3~0 127) (<= 0 ~id2~0) (= |#NULL.offset| 0) (<= 0 (+ ~nomsg~0 1)) (<= ~id2~0 127) (<= 0 ~st3~0) (<= 0 (+ |ULTIMATE.start_main_~node2__m2~0#1| 1)) (= ~p3~0 0) (= (ite (= |ULTIMATE.start_main_~main__c1~0#1| 0) 0 1) |ULTIMATE.start_main_~__tmp_1~0#1|) (= (mod |ULTIMATE.start_main_~assert__arg~0#1| 256) 0) (or (and (not (= (+ ~st4~0 ~st3~0 ~st2~0 ~st1~0) 1)) (not (< (mod ~r1~0 256) 4))) (not (<= (+ ~st4~0 ~st3~0 ~st2~0 ~st1~0) 1))) (<= (+ ~p1_old~0 1) 0) (= ~p1~0 0) (<= 0 |#StackHeapBarrier|) (<= 0 ~send1~0) (<= (+ |ULTIMATE.start_main_~node2__m2~0#1| 1) 0) (= ~__return_main~0 0) (= |#NULL.base| 0) (= |ULTIMATE.start_main_~main__i2~0#1| 0))' at error location [2022-12-14 05:19:31,588 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 05:19:31,588 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 05:19:31,588 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 44 [2022-12-14 05:19:31,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020623665] [2022-12-14 05:19:31,589 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 05:19:31,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-12-14 05:19:31,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:19:31,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-12-14 05:19:31,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1148, Invalid=7408, Unknown=0, NotChecked=0, Total=8556 [2022-12-14 05:19:31,590 INFO L87 Difference]: Start difference. First operand 22293 states and 31601 transitions. Second operand has 44 states, 44 states have (on average 3.909090909090909) internal successors, (172), 44 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:22:39,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:22:39,731 INFO L93 Difference]: Finished difference Result 227232 states and 324543 transitions. [2022-12-14 05:22:39,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 390 states. [2022-12-14 05:22:39,731 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 3.909090909090909) internal successors, (172), 44 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2022-12-14 05:22:39,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:22:40,126 INFO L225 Difference]: With dead ends: 227232 [2022-12-14 05:22:40,126 INFO L226 Difference]: Without dead ends: 204973 [2022-12-14 05:22:40,208 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 579 GetRequests, 104 SyntacticMatches, 2 SemanticMatches, 473 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104002 ImplicationChecksByTransitivity, 109.5s TimeCoverageRelationStatistics Valid=32029, Invalid=193121, Unknown=0, NotChecked=0, Total=225150 [2022-12-14 05:22:40,209 INFO L413 NwaCegarLoop]: 350 mSDtfsCounter, 12126 mSDsluCounter, 8395 mSDsCounter, 0 mSdLazyCounter, 11228 mSolverCounterSat, 655 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12126 SdHoareTripleChecker+Valid, 8745 SdHoareTripleChecker+Invalid, 11883 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 655 IncrementalHoareTripleChecker+Valid, 11228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.1s IncrementalHoareTripleChecker+Time [2022-12-14 05:22:40,209 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12126 Valid, 8745 Invalid, 11883 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [655 Valid, 11228 Invalid, 0 Unknown, 0 Unchecked, 14.1s Time] [2022-12-14 05:22:40,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204973 states. [2022-12-14 05:23:22,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204973 to 100056. [2022-12-14 05:23:22,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100056 states, 100055 states have (on average 1.412982859427315) internal successors, (141376), 100055 states have internal predecessors, (141376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:23:22,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100056 states to 100056 states and 141376 transitions. [2022-12-14 05:23:22,376 INFO L78 Accepts]: Start accepts. Automaton has 100056 states and 141376 transitions. Word has length 61 [2022-12-14 05:23:22,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:23:22,376 INFO L495 AbstractCegarLoop]: Abstraction has 100056 states and 141376 transitions. [2022-12-14 05:23:22,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 3.909090909090909) internal successors, (172), 44 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:23:22,377 INFO L276 IsEmpty]: Start isEmpty. Operand 100056 states and 141376 transitions. [2022-12-14 05:23:22,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-12-14 05:23:22,381 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:23:22,381 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:23:22,387 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b3c995f-587a-4253-9caf-0ad4ebf3c156/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 05:23:22,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b3c995f-587a-4253-9caf-0ad4ebf3c156/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-12-14 05:23:22,583 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:23:22,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:23:22,584 INFO L85 PathProgramCache]: Analyzing trace with hash 1571506049, now seen corresponding path program 1 times [2022-12-14 05:23:22,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:23:22,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750515098] [2022-12-14 05:23:22,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:23:22,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:23:22,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:23:22,674 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 05:23:22,674 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:23:22,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750515098] [2022-12-14 05:23:22,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750515098] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:23:22,675 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:23:22,675 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 05:23:22,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239214272] [2022-12-14 05:23:22,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:23:22,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 05:23:22,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:23:22,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 05:23:22,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 05:23:22,676 INFO L87 Difference]: Start difference. First operand 100056 states and 141376 transitions. Second operand has 5 states, 5 states have (on average 12.2) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:24:16,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:24:16,354 INFO L93 Difference]: Finished difference Result 230143 states and 326626 transitions. [2022-12-14 05:24:16,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 05:24:16,355 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2022-12-14 05:24:16,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:24:16,579 INFO L225 Difference]: With dead ends: 230143 [2022-12-14 05:24:16,579 INFO L226 Difference]: Without dead ends: 131383 [2022-12-14 05:24:16,651 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-12-14 05:24:16,651 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 412 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 412 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 05:24:16,651 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [412 Valid, 126 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 05:24:16,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131383 states. [2022-12-14 05:25:09,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131383 to 131381. [2022-12-14 05:25:09,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131381 states, 131380 states have (on average 1.4038438118435075) internal successors, (184437), 131380 states have internal predecessors, (184437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:25:10,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131381 states to 131381 states and 184437 transitions. [2022-12-14 05:25:10,240 INFO L78 Accepts]: Start accepts. Automaton has 131381 states and 184437 transitions. Word has length 63 [2022-12-14 05:25:10,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:25:10,240 INFO L495 AbstractCegarLoop]: Abstraction has 131381 states and 184437 transitions. [2022-12-14 05:25:10,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:25:10,240 INFO L276 IsEmpty]: Start isEmpty. Operand 131381 states and 184437 transitions. [2022-12-14 05:25:10,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-12-14 05:25:10,242 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:25:10,242 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:25:10,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-14 05:25:10,243 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 05:25:10,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:25:10,243 INFO L85 PathProgramCache]: Analyzing trace with hash 605626726, now seen corresponding path program 1 times [2022-12-14 05:25:10,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:25:10,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135360040] [2022-12-14 05:25:10,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:25:10,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:25:10,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:25:11,311 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:25:11,311 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:25:11,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135360040] [2022-12-14 05:25:11,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135360040] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:25:11,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512754390] [2022-12-14 05:25:11,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:25:11,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:25:11,312 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b3c995f-587a-4253-9caf-0ad4ebf3c156/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:25:11,313 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b3c995f-587a-4253-9caf-0ad4ebf3c156/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:25:11,313 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b3c995f-587a-4253-9caf-0ad4ebf3c156/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 05:25:11,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:25:11,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 53 conjunts are in the unsatisfiable core [2022-12-14 05:25:11,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:25:12,401 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:25:12,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:25:19,467 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:25:19,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512754390] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:25:19,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1245877922] [2022-12-14 05:25:19,468 INFO L159 IcfgInterpreter]: Started Sifa with 54 locations of interest [2022-12-14 05:25:19,469 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 05:25:19,469 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 05:25:19,469 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 05:25:19,469 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 05:25:19,512 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 05:25:19,513 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 05:25:19,513 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 05:25:19,514 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 21 [2022-12-14 05:25:19,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:25:19,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:25:19,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:25:19,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:25:19,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:25:19,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 05:25:19,533 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 12 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 21 [2022-12-14 05:25:32,556 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 05:25:54,251 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1318009#(and (<= 0 ~id3~0) (= ~nomsg~0 ~p1_new~0) (= ~nomsg~0 ~p4_new~0) (<= ~__return_19080~0 1) (= ~p4~0 0) (<= 0 ~mode4~0) (<= 0 (+ ~p1_old~0 1)) (<= ~id4~0 127) (<= 0 ~id1~0) (<= 0 (+ ~p4_old~0 1)) (<= 0 ~st4~0) (= ~p2~0 0) (<= |ULTIMATE.start_main_~node2____CPAchecker_TMP_0~0#1| 127) (<= ~send1~0 127) (= ~__return_19215~0 |ULTIMATE.start_main_~check__tmp~0#1|) (<= 0 (+ ~st1~0 1)) (= ~p3_new~0 ~nomsg~0) (<= ~mode2~0 1) (<= (+ ~p4_old~0 1) 0) (<= 0 ~st2~0) (= ~__return_19215~0 |ULTIMATE.start_main_~main__c1~0#1|) (<= ~mode3~0 1) (<= 0 ~send2~0) (<= 0 (+ |ULTIMATE.start_main_~node1__m1~0#1| 1)) (<= ~mode4~0 1) (<= ~id1~0 127) (= ~nomsg~0 ~p2_new~0) (<= ~st1~0 1) (<= ~send2~0 127) (= |ULTIMATE.start_main_~init__tmp~0#1| 1) (<= (+ |ULTIMATE.start_main_~node1__m1~0#1| 1) 0) (<= (+ ~nomsg~0 1) 0) (<= ~mode1~0 1) (= |ULTIMATE.start_main_~assert__arg~0#1| |ULTIMATE.start_main_~__tmp_1~0#1|) (<= ~st2~0 0) (<= 0 |ULTIMATE.start_main_~node2____CPAchecker_TMP_0~0#1|) (<= 1 ~__return_19080~0) (<= 0 ~id4~0) (<= ~id3~0 127) (<= 0 ~id2~0) (= |#NULL.offset| 0) (<= 0 (+ ~nomsg~0 1)) (<= ~id2~0 127) (<= 0 ~st3~0) (<= 0 (+ |ULTIMATE.start_main_~node2__m2~0#1| 1)) (= ~p3~0 0) (= (ite (= |ULTIMATE.start_main_~main__c1~0#1| 0) 0 1) |ULTIMATE.start_main_~__tmp_1~0#1|) (= (mod |ULTIMATE.start_main_~assert__arg~0#1| 256) 0) (or (and (not (= (+ ~st4~0 ~st3~0 ~st2~0 ~st1~0) 1)) (not (< (mod ~r1~0 256) 4))) (not (<= (+ ~st4~0 ~st3~0 ~st2~0 ~st1~0) 1))) (<= (+ ~p1_old~0 1) 0) (= ~p1~0 0) (<= 0 |#StackHeapBarrier|) (<= 0 ~send1~0) (<= (+ |ULTIMATE.start_main_~node2__m2~0#1| 1) 0) (= ~__return_main~0 0) (= |#NULL.base| 0) (= |ULTIMATE.start_main_~main__i2~0#1| 0))' at error location [2022-12-14 05:25:54,251 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 05:25:54,251 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 05:25:54,251 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18, 18] total 54 [2022-12-14 05:25:54,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548031647] [2022-12-14 05:25:54,252 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 05:25:54,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-12-14 05:25:54,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:25:54,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-12-14 05:25:54,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1330, Invalid=9176, Unknown=0, NotChecked=0, Total=10506 [2022-12-14 05:25:54,253 INFO L87 Difference]: Start difference. First operand 131381 states and 184437 transitions. Second operand has 54 states, 54 states have (on average 3.4444444444444446) internal successors, (186), 54 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)