./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.13.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e04fb08f 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_c16c3c6f-e98f-4cb8-9354-ba32a1c53072/bin/utaipan-Xvt2sAort0/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c16c3c6f-e98f-4cb8-9354-ba32a1c53072/bin/utaipan-Xvt2sAort0/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c16c3c6f-e98f-4cb8-9354-ba32a1c53072/bin/utaipan-Xvt2sAort0/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c16c3c6f-e98f-4cb8-9354-ba32a1c53072/bin/utaipan-Xvt2sAort0/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.13.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c16c3c6f-e98f-4cb8-9354-ba32a1c53072/bin/utaipan-Xvt2sAort0/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c16c3c6f-e98f-4cb8-9354-ba32a1c53072/bin/utaipan-Xvt2sAort0 --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 6f520cae1fe274b0f3a6786f3c06c3b2db48180a97ced5103b1a188b50ee581d --- 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-e04fb08 [2022-11-16 20:24:28,410 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 20:24:28,411 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 20:24:28,432 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 20:24:28,433 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 20:24:28,434 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 20:24:28,435 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 20:24:28,438 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 20:24:28,440 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 20:24:28,441 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 20:24:28,442 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 20:24:28,444 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 20:24:28,446 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 20:24:28,447 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 20:24:28,449 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 20:24:28,450 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 20:24:28,451 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 20:24:28,452 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 20:24:28,454 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 20:24:28,457 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 20:24:28,458 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 20:24:28,468 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 20:24:28,473 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 20:24:28,475 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 20:24:28,482 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 20:24:28,492 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 20:24:28,492 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 20:24:28,493 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 20:24:28,494 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 20:24:28,496 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 20:24:28,497 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 20:24:28,499 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 20:24:28,501 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 20:24:28,502 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 20:24:28,504 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 20:24:28,505 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 20:24:28,505 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 20:24:28,506 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 20:24:28,506 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 20:24:28,507 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 20:24:28,508 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 20:24:28,509 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c16c3c6f-e98f-4cb8-9354-ba32a1c53072/bin/utaipan-Xvt2sAort0/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-16 20:24:28,535 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 20:24:28,536 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 20:24:28,536 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 20:24:28,536 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 20:24:28,537 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 20:24:28,537 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 20:24:28,537 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-16 20:24:28,538 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-16 20:24:28,538 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-16 20:24:28,538 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-16 20:24:28,538 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-16 20:24:28,538 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-16 20:24:28,539 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-16 20:24:28,539 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-16 20:24:28,539 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-16 20:24:28,539 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-16 20:24:28,539 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-16 20:24:28,540 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-16 20:24:28,540 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 20:24:28,541 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 20:24:28,541 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 20:24:28,541 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 20:24:28,541 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 20:24:28,541 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 20:24:28,542 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 20:24:28,542 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 20:24:28,542 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 20:24:28,542 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 20:24:28,542 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 20:24:28,543 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 20:24:28,543 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 20:24:28,543 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 20:24:28,543 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 20:24:28,544 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 20:24:28,544 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-16 20:24:28,544 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 20:24:28,544 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 20:24:28,544 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-16 20:24:28,545 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 20:24:28,545 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 20:24:28,545 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-16 20:24:28,545 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_c16c3c6f-e98f-4cb8-9354-ba32a1c53072/bin/utaipan-Xvt2sAort0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c16c3c6f-e98f-4cb8-9354-ba32a1c53072/bin/utaipan-Xvt2sAort0 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6f520cae1fe274b0f3a6786f3c06c3b2db48180a97ced5103b1a188b50ee581d [2022-11-16 20:24:28,898 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 20:24:28,932 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 20:24:28,935 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 20:24:28,937 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 20:24:28,939 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 20:24:28,940 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c16c3c6f-e98f-4cb8-9354-ba32a1c53072/bin/utaipan-Xvt2sAort0/../../sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.13.cil-2.c [2022-11-16 20:24:29,019 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c16c3c6f-e98f-4cb8-9354-ba32a1c53072/bin/utaipan-Xvt2sAort0/data/9e7c23811/45ef746061a14763aef9a4081eaea2dd/FLAG50567a1dd [2022-11-16 20:24:29,724 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 20:24:29,724 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c16c3c6f-e98f-4cb8-9354-ba32a1c53072/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.13.cil-2.c [2022-11-16 20:24:29,748 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c16c3c6f-e98f-4cb8-9354-ba32a1c53072/bin/utaipan-Xvt2sAort0/data/9e7c23811/45ef746061a14763aef9a4081eaea2dd/FLAG50567a1dd [2022-11-16 20:24:29,957 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c16c3c6f-e98f-4cb8-9354-ba32a1c53072/bin/utaipan-Xvt2sAort0/data/9e7c23811/45ef746061a14763aef9a4081eaea2dd [2022-11-16 20:24:29,959 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 20:24:29,961 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 20:24:29,967 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 20:24:29,968 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 20:24:29,973 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 20:24:29,974 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 08:24:29" (1/1) ... [2022-11-16 20:24:29,975 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@21a051f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:24:29, skipping insertion in model container [2022-11-16 20:24:29,979 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 08:24:29" (1/1) ... [2022-11-16 20:24:29,987 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 20:24:30,052 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 20:24:30,277 WARN L229 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_c16c3c6f-e98f-4cb8-9354-ba32a1c53072/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.13.cil-2.c[911,924] [2022-11-16 20:24:30,338 WARN L229 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_c16c3c6f-e98f-4cb8-9354-ba32a1c53072/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.13.cil-2.c[8416,8429] [2022-11-16 20:24:30,451 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 20:24:30,476 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 20:24:30,492 WARN L229 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_c16c3c6f-e98f-4cb8-9354-ba32a1c53072/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.13.cil-2.c[911,924] [2022-11-16 20:24:30,526 WARN L229 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_c16c3c6f-e98f-4cb8-9354-ba32a1c53072/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.13.cil-2.c[8416,8429] [2022-11-16 20:24:30,592 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 20:24:30,615 INFO L208 MainTranslator]: Completed translation [2022-11-16 20:24:30,616 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:24:30 WrapperNode [2022-11-16 20:24:30,616 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 20:24:30,617 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 20:24:30,617 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 20:24:30,618 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 20:24:30,625 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:24:30" (1/1) ... [2022-11-16 20:24:30,646 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:24:30" (1/1) ... [2022-11-16 20:24:30,704 INFO L138 Inliner]: procedures = 81, calls = 100, calls flagged for inlining = 50, calls inlined = 50, statements flattened = 1136 [2022-11-16 20:24:30,704 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 20:24:30,705 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 20:24:30,705 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 20:24:30,705 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 20:24:30,718 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:24:30" (1/1) ... [2022-11-16 20:24:30,726 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:24:30" (1/1) ... [2022-11-16 20:24:30,731 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:24:30" (1/1) ... [2022-11-16 20:24:30,732 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:24:30" (1/1) ... [2022-11-16 20:24:30,747 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:24:30" (1/1) ... [2022-11-16 20:24:30,765 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:24:30" (1/1) ... [2022-11-16 20:24:30,781 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:24:30" (1/1) ... [2022-11-16 20:24:30,785 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:24:30" (1/1) ... [2022-11-16 20:24:30,797 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 20:24:30,803 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 20:24:30,804 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 20:24:30,804 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 20:24:30,810 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:24:30" (1/1) ... [2022-11-16 20:24:30,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 20:24:30,830 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c16c3c6f-e98f-4cb8-9354-ba32a1c53072/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:24:30,843 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c16c3c6f-e98f-4cb8-9354-ba32a1c53072/bin/utaipan-Xvt2sAort0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 20:24:30,870 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c16c3c6f-e98f-4cb8-9354-ba32a1c53072/bin/utaipan-Xvt2sAort0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 20:24:30,892 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 20:24:30,892 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-11-16 20:24:30,893 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-11-16 20:24:30,893 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2022-11-16 20:24:30,893 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2022-11-16 20:24:30,893 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2022-11-16 20:24:30,894 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2022-11-16 20:24:30,894 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2022-11-16 20:24:30,894 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2022-11-16 20:24:30,895 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2022-11-16 20:24:30,895 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2022-11-16 20:24:30,895 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2022-11-16 20:24:30,895 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2022-11-16 20:24:30,895 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2022-11-16 20:24:30,896 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2022-11-16 20:24:30,896 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2022-11-16 20:24:30,896 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2022-11-16 20:24:30,896 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2022-11-16 20:24:30,896 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2022-11-16 20:24:30,896 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2022-11-16 20:24:30,897 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2022-11-16 20:24:30,897 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2022-11-16 20:24:30,897 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2022-11-16 20:24:30,898 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 20:24:30,898 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2022-11-16 20:24:30,898 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2022-11-16 20:24:30,898 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2022-11-16 20:24:30,900 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2022-11-16 20:24:30,900 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 20:24:30,900 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 20:24:30,900 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2022-11-16 20:24:30,901 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2022-11-16 20:24:31,138 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 20:24:31,141 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 20:24:32,115 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##56: assume !(1 == ~q_free~0); [2022-11-16 20:24:32,115 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##55: assume 1 == ~q_free~0;~c_dr_st~0 := 2;~c_dr_pc~0 := 2;~a_t~0 := do_read_c_~a~0#1; [2022-11-16 20:24:32,213 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 20:24:32,804 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 20:24:32,804 INFO L300 CfgBuilder]: Removed 20 assume(true) statements. [2022-11-16 20:24:32,807 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 08:24:32 BoogieIcfgContainer [2022-11-16 20:24:32,808 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 20:24:32,810 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 20:24:32,810 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 20:24:32,813 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 20:24:32,813 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 08:24:29" (1/3) ... [2022-11-16 20:24:32,814 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75f2fe36 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 08:24:32, skipping insertion in model container [2022-11-16 20:24:32,814 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:24:30" (2/3) ... [2022-11-16 20:24:32,815 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75f2fe36 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 08:24:32, skipping insertion in model container [2022-11-16 20:24:32,815 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 08:24:32" (3/3) ... [2022-11-16 20:24:32,816 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_3.cil+token_ring.13.cil-2.c [2022-11-16 20:24:32,837 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 20:24:32,837 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-16 20:24:32,894 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 20:24:32,901 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;@45e000bc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 20:24:32,901 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-16 20:24:32,906 INFO L276 IsEmpty]: Start isEmpty. Operand has 278 states, 218 states have (on average 1.5458715596330275) internal successors, (337), 224 states have internal predecessors, (337), 43 states have call successors, (43), 14 states have call predecessors, (43), 14 states have return successors, (43), 42 states have call predecessors, (43), 43 states have call successors, (43) [2022-11-16 20:24:32,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-16 20:24:32,918 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:24:32,918 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] [2022-11-16 20:24:32,919 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:24:32,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:24:32,925 INFO L85 PathProgramCache]: Analyzing trace with hash 1264450513, now seen corresponding path program 1 times [2022-11-16 20:24:32,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:24:32,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991633113] [2022-11-16 20:24:32,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:24:32,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:24:33,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:24:33,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:24:33,402 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:24:33,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991633113] [2022-11-16 20:24:33,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991633113] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:24:33,403 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:24:33,403 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 20:24:33,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710601043] [2022-11-16 20:24:33,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:24:33,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 20:24:33,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:24:33,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 20:24:33,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 20:24:33,453 INFO L87 Difference]: Start difference. First operand has 278 states, 218 states have (on average 1.5458715596330275) internal successors, (337), 224 states have internal predecessors, (337), 43 states have call successors, (43), 14 states have call predecessors, (43), 14 states have return successors, (43), 42 states have call predecessors, (43), 43 states have call successors, (43) Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-16 20:24:34,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:24:34,211 INFO L93 Difference]: Finished difference Result 679 states and 1024 transitions. [2022-11-16 20:24:34,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 20:24:34,214 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) Word has length 44 [2022-11-16 20:24:34,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:24:34,229 INFO L225 Difference]: With dead ends: 679 [2022-11-16 20:24:34,229 INFO L226 Difference]: Without dead ends: 402 [2022-11-16 20:24:34,235 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 20:24:34,239 INFO L413 NwaCegarLoop]: 411 mSDtfsCounter, 475 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 475 SdHoareTripleChecker+Valid, 734 SdHoareTripleChecker+Invalid, 338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 20:24:34,240 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [475 Valid, 734 Invalid, 338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-16 20:24:34,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2022-11-16 20:24:34,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 391. [2022-11-16 20:24:34,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 299 states have (on average 1.4615384615384615) internal successors, (437), 303 states have internal predecessors, (437), 63 states have call successors, (63), 28 states have call predecessors, (63), 27 states have return successors, (64), 61 states have call predecessors, (64), 61 states have call successors, (64) [2022-11-16 20:24:34,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 564 transitions. [2022-11-16 20:24:34,373 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 564 transitions. Word has length 44 [2022-11-16 20:24:34,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:24:34,373 INFO L495 AbstractCegarLoop]: Abstraction has 391 states and 564 transitions. [2022-11-16 20:24:34,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-16 20:24:34,374 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 564 transitions. [2022-11-16 20:24:34,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-16 20:24:34,381 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:24:34,381 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] [2022-11-16 20:24:34,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 20:24:34,382 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:24:34,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:24:34,384 INFO L85 PathProgramCache]: Analyzing trace with hash -1960853706, now seen corresponding path program 1 times [2022-11-16 20:24:34,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:24:34,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385641911] [2022-11-16 20:24:34,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:24:34,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:24:34,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:24:34,624 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:24:34,626 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:24:34,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385641911] [2022-11-16 20:24:34,626 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385641911] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:24:34,627 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:24:34,628 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-16 20:24:34,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081040315] [2022-11-16 20:24:34,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:24:34,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 20:24:34,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:24:34,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 20:24:34,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-16 20:24:34,634 INFO L87 Difference]: Start difference. First operand 391 states and 564 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-16 20:24:35,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:24:35,769 INFO L93 Difference]: Finished difference Result 928 states and 1287 transitions. [2022-11-16 20:24:35,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 20:24:35,769 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 45 [2022-11-16 20:24:35,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:24:35,773 INFO L225 Difference]: With dead ends: 928 [2022-11-16 20:24:35,773 INFO L226 Difference]: Without dead ends: 462 [2022-11-16 20:24:35,776 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-16 20:24:35,777 INFO L413 NwaCegarLoop]: 483 mSDtfsCounter, 1006 mSDsluCounter, 763 mSDsCounter, 0 mSdLazyCounter, 822 mSolverCounterSat, 300 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1015 SdHoareTripleChecker+Valid, 1246 SdHoareTripleChecker+Invalid, 1122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 300 IncrementalHoareTripleChecker+Valid, 822 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-16 20:24:35,777 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1015 Valid, 1246 Invalid, 1122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [300 Valid, 822 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-16 20:24:35,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2022-11-16 20:24:35,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 377. [2022-11-16 20:24:35,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 285 states have (on average 1.4175438596491228) internal successors, (404), 289 states have internal predecessors, (404), 63 states have call successors, (63), 28 states have call predecessors, (63), 27 states have return successors, (61), 61 states have call predecessors, (61), 61 states have call successors, (61) [2022-11-16 20:24:35,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 528 transitions. [2022-11-16 20:24:35,815 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 528 transitions. Word has length 45 [2022-11-16 20:24:35,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:24:35,816 INFO L495 AbstractCegarLoop]: Abstraction has 377 states and 528 transitions. [2022-11-16 20:24:35,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-16 20:24:35,816 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 528 transitions. [2022-11-16 20:24:35,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-16 20:24:35,818 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:24:35,818 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] [2022-11-16 20:24:35,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-16 20:24:35,818 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:24:35,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:24:35,819 INFO L85 PathProgramCache]: Analyzing trace with hash -265144330, now seen corresponding path program 1 times [2022-11-16 20:24:35,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:24:35,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714516270] [2022-11-16 20:24:35,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:24:35,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:24:35,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:24:35,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:24:35,966 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:24:35,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714516270] [2022-11-16 20:24:35,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714516270] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:24:35,966 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:24:35,967 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-16 20:24:35,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241772191] [2022-11-16 20:24:35,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:24:35,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 20:24:35,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:24:35,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 20:24:35,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-16 20:24:35,968 INFO L87 Difference]: Start difference. First operand 377 states and 528 transitions. Second operand has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 states have internal predecessors, (31), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-16 20:24:36,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:24:36,890 INFO L93 Difference]: Finished difference Result 843 states and 1136 transitions. [2022-11-16 20:24:36,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 20:24:36,891 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 states have internal predecessors, (31), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 46 [2022-11-16 20:24:36,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:24:36,896 INFO L225 Difference]: With dead ends: 843 [2022-11-16 20:24:36,896 INFO L226 Difference]: Without dead ends: 666 [2022-11-16 20:24:36,898 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-16 20:24:36,899 INFO L413 NwaCegarLoop]: 473 mSDtfsCounter, 914 mSDsluCounter, 723 mSDsCounter, 0 mSdLazyCounter, 715 mSolverCounterSat, 298 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 922 SdHoareTripleChecker+Valid, 1196 SdHoareTripleChecker+Invalid, 1013 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 298 IncrementalHoareTripleChecker+Valid, 715 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-16 20:24:36,900 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [922 Valid, 1196 Invalid, 1013 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [298 Valid, 715 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-16 20:24:36,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 666 states. [2022-11-16 20:24:36,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 666 to 641. [2022-11-16 20:24:36,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 641 states, 466 states have (on average 1.3369098712446352) internal successors, (623), 470 states have internal predecessors, (623), 112 states have call successors, (112), 62 states have call predecessors, (112), 61 states have return successors, (127), 110 states have call predecessors, (127), 110 states have call successors, (127) [2022-11-16 20:24:36,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 641 states to 641 states and 862 transitions. [2022-11-16 20:24:36,969 INFO L78 Accepts]: Start accepts. Automaton has 641 states and 862 transitions. Word has length 46 [2022-11-16 20:24:36,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:24:36,970 INFO L495 AbstractCegarLoop]: Abstraction has 641 states and 862 transitions. [2022-11-16 20:24:36,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 states have internal predecessors, (31), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-16 20:24:36,970 INFO L276 IsEmpty]: Start isEmpty. Operand 641 states and 862 transitions. [2022-11-16 20:24:36,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-16 20:24:36,972 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:24:36,972 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] [2022-11-16 20:24:36,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-16 20:24:36,973 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:24:36,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:24:36,974 INFO L85 PathProgramCache]: Analyzing trace with hash 1234686571, now seen corresponding path program 1 times [2022-11-16 20:24:36,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:24:36,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209931114] [2022-11-16 20:24:36,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:24:36,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:24:36,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:24:37,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:24:37,026 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:24:37,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209931114] [2022-11-16 20:24:37,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209931114] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:24:37,027 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:24:37,027 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 20:24:37,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473753287] [2022-11-16 20:24:37,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:24:37,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 20:24:37,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:24:37,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 20:24:37,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 20:24:37,029 INFO L87 Difference]: Start difference. First operand 641 states and 862 transitions. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-16 20:24:37,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:24:37,199 INFO L93 Difference]: Finished difference Result 642 states and 863 transitions. [2022-11-16 20:24:37,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 20:24:37,200 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 50 [2022-11-16 20:24:37,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:24:37,202 INFO L225 Difference]: With dead ends: 642 [2022-11-16 20:24:37,202 INFO L226 Difference]: Without dead ends: 198 [2022-11-16 20:24:37,203 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 20:24:37,204 INFO L413 NwaCegarLoop]: 323 mSDtfsCounter, 372 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 372 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 20:24:37,205 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [372 Valid, 323 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 20:24:37,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2022-11-16 20:24:37,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 198. [2022-11-16 20:24:37,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 164 states have (on average 1.5304878048780488) internal successors, (251), 165 states have internal predecessors, (251), 27 states have call successors, (27), 6 states have call predecessors, (27), 6 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2022-11-16 20:24:37,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 305 transitions. [2022-11-16 20:24:37,226 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 305 transitions. Word has length 50 [2022-11-16 20:24:37,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:24:37,226 INFO L495 AbstractCegarLoop]: Abstraction has 198 states and 305 transitions. [2022-11-16 20:24:37,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-16 20:24:37,227 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 305 transitions. [2022-11-16 20:24:37,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-16 20:24:37,228 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:24:37,228 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:24:37,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-16 20:24:37,229 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:24:37,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:24:37,229 INFO L85 PathProgramCache]: Analyzing trace with hash -794503871, now seen corresponding path program 1 times [2022-11-16 20:24:37,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:24:37,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904935215] [2022-11-16 20:24:37,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:24:37,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:24:37,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:24:37,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:24:37,432 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:24:37,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904935215] [2022-11-16 20:24:37,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904935215] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:24:37,433 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:24:37,433 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 20:24:37,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214559838] [2022-11-16 20:24:37,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:24:37,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 20:24:37,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:24:37,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 20:24:37,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 20:24:37,435 INFO L87 Difference]: Start difference. First operand 198 states and 305 transitions. Second operand has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-16 20:24:38,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:24:38,596 INFO L93 Difference]: Finished difference Result 1131 states and 1861 transitions. [2022-11-16 20:24:38,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 20:24:38,597 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 70 [2022-11-16 20:24:38,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:24:38,603 INFO L225 Difference]: With dead ends: 1131 [2022-11-16 20:24:38,603 INFO L226 Difference]: Without dead ends: 939 [2022-11-16 20:24:38,605 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-16 20:24:38,606 INFO L413 NwaCegarLoop]: 571 mSDtfsCounter, 1423 mSDsluCounter, 840 mSDsCounter, 0 mSdLazyCounter, 632 mSolverCounterSat, 257 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1441 SdHoareTripleChecker+Valid, 1411 SdHoareTripleChecker+Invalid, 889 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 257 IncrementalHoareTripleChecker+Valid, 632 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-16 20:24:38,607 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1441 Valid, 1411 Invalid, 889 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [257 Valid, 632 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-16 20:24:38,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 939 states. [2022-11-16 20:24:38,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 939 to 928. [2022-11-16 20:24:38,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 928 states, 781 states have (on average 1.5326504481434058) internal successors, (1197), 785 states have internal predecessors, (1197), 116 states have call successors, (116), 30 states have call predecessors, (116), 30 states have return successors, (182), 113 states have call predecessors, (182), 116 states have call successors, (182) [2022-11-16 20:24:38,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 928 states to 928 states and 1495 transitions. [2022-11-16 20:24:38,701 INFO L78 Accepts]: Start accepts. Automaton has 928 states and 1495 transitions. Word has length 70 [2022-11-16 20:24:38,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:24:38,702 INFO L495 AbstractCegarLoop]: Abstraction has 928 states and 1495 transitions. [2022-11-16 20:24:38,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-16 20:24:38,702 INFO L276 IsEmpty]: Start isEmpty. Operand 928 states and 1495 transitions. [2022-11-16 20:24:38,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-11-16 20:24:38,705 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:24:38,706 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:24:38,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-16 20:24:38,706 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:24:38,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:24:38,707 INFO L85 PathProgramCache]: Analyzing trace with hash -1621624810, now seen corresponding path program 1 times [2022-11-16 20:24:38,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:24:38,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568413204] [2022-11-16 20:24:38,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:24:38,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:24:38,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:24:38,978 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-16 20:24:38,978 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:24:38,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568413204] [2022-11-16 20:24:38,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568413204] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 20:24:38,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844094582] [2022-11-16 20:24:38,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:24:38,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:24:38,980 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c16c3c6f-e98f-4cb8-9354-ba32a1c53072/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:24:39,004 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c16c3c6f-e98f-4cb8-9354-ba32a1c53072/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:24:39,032 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c16c3c6f-e98f-4cb8-9354-ba32a1c53072/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 20:24:39,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:24:39,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 1128 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-16 20:24:39,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:24:39,425 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-16 20:24:39,426 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 20:24:39,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844094582] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:24:39,426 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 20:24:39,426 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-16 20:24:39,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058994866] [2022-11-16 20:24:39,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:24:39,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 20:24:39,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:24:39,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 20:24:39,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-16 20:24:39,429 INFO L87 Difference]: Start difference. First operand 928 states and 1495 transitions. Second operand has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 2 states have internal predecessors, (113), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-16 20:24:39,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:24:39,794 INFO L93 Difference]: Finished difference Result 2756 states and 4576 transitions. [2022-11-16 20:24:39,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 20:24:39,797 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 2 states have internal predecessors, (113), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 143 [2022-11-16 20:24:39,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:24:39,808 INFO L225 Difference]: With dead ends: 2756 [2022-11-16 20:24:39,809 INFO L226 Difference]: Without dead ends: 1834 [2022-11-16 20:24:39,814 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-16 20:24:39,815 INFO L413 NwaCegarLoop]: 275 mSDtfsCounter, 253 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 516 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 20:24:39,816 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [253 Valid, 516 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 20:24:39,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1834 states. [2022-11-16 20:24:39,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1834 to 1827. [2022-11-16 20:24:39,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1827 states, 1543 states have (on average 1.5294880103694102) internal successors, (2360), 1550 states have internal predecessors, (2360), 223 states have call successors, (223), 60 states have call predecessors, (223), 60 states have return successors, (351), 217 states have call predecessors, (351), 223 states have call successors, (351) [2022-11-16 20:24:40,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1827 states to 1827 states and 2934 transitions. [2022-11-16 20:24:40,009 INFO L78 Accepts]: Start accepts. Automaton has 1827 states and 2934 transitions. Word has length 143 [2022-11-16 20:24:40,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:24:40,009 INFO L495 AbstractCegarLoop]: Abstraction has 1827 states and 2934 transitions. [2022-11-16 20:24:40,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 2 states have internal predecessors, (113), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-16 20:24:40,010 INFO L276 IsEmpty]: Start isEmpty. Operand 1827 states and 2934 transitions. [2022-11-16 20:24:40,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-11-16 20:24:40,015 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:24:40,015 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:24:40,026 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c16c3c6f-e98f-4cb8-9354-ba32a1c53072/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-16 20:24:40,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c16c3c6f-e98f-4cb8-9354-ba32a1c53072/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:24:40,222 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:24:40,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:24:40,222 INFO L85 PathProgramCache]: Analyzing trace with hash -394152552, now seen corresponding path program 1 times [2022-11-16 20:24:40,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:24:40,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123244609] [2022-11-16 20:24:40,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:24:40,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:24:40,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:24:40,467 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-16 20:24:40,468 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:24:40,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123244609] [2022-11-16 20:24:40,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123244609] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 20:24:40,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597480584] [2022-11-16 20:24:40,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:24:40,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:24:40,468 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c16c3c6f-e98f-4cb8-9354-ba32a1c53072/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:24:40,469 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c16c3c6f-e98f-4cb8-9354-ba32a1c53072/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:24:40,494 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c16c3c6f-e98f-4cb8-9354-ba32a1c53072/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 20:24:40,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:24:40,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 1122 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-16 20:24:40,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:24:40,842 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-16 20:24:40,847 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 20:24:40,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [597480584] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:24:40,848 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 20:24:40,851 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-16 20:24:40,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010858494] [2022-11-16 20:24:40,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:24:40,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 20:24:40,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:24:40,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 20:24:40,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-16 20:24:40,855 INFO L87 Difference]: Start difference. First operand 1827 states and 2934 transitions. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 2 states have internal predecessors, (92), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-16 20:24:41,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:24:41,321 INFO L93 Difference]: Finished difference Result 5438 states and 8994 transitions. [2022-11-16 20:24:41,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 20:24:41,324 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 2 states have internal predecessors, (92), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 143 [2022-11-16 20:24:41,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:24:41,348 INFO L225 Difference]: With dead ends: 5438 [2022-11-16 20:24:41,348 INFO L226 Difference]: Without dead ends: 3617 [2022-11-16 20:24:41,359 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-16 20:24:41,360 INFO L413 NwaCegarLoop]: 275 mSDtfsCounter, 274 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 516 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 20:24:41,360 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [274 Valid, 516 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 20:24:41,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3617 states. [2022-11-16 20:24:41,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3617 to 3605. [2022-11-16 20:24:41,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3605 states, 3052 states have (on average 1.525557011795544) internal successors, (4656), 3065 states have internal predecessors, (4656), 432 states have call successors, (432), 120 states have call predecessors, (432), 120 states have return successors, (680), 420 states have call predecessors, (680), 432 states have call successors, (680) [2022-11-16 20:24:41,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3605 states to 3605 states and 5768 transitions. [2022-11-16 20:24:41,729 INFO L78 Accepts]: Start accepts. Automaton has 3605 states and 5768 transitions. Word has length 143 [2022-11-16 20:24:41,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:24:41,731 INFO L495 AbstractCegarLoop]: Abstraction has 3605 states and 5768 transitions. [2022-11-16 20:24:41,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 2 states have internal predecessors, (92), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-16 20:24:41,732 INFO L276 IsEmpty]: Start isEmpty. Operand 3605 states and 5768 transitions. [2022-11-16 20:24:41,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-11-16 20:24:41,744 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:24:41,744 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:24:41,755 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c16c3c6f-e98f-4cb8-9354-ba32a1c53072/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-16 20:24:41,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c16c3c6f-e98f-4cb8-9354-ba32a1c53072/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:24:41,950 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:24:41,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:24:41,951 INFO L85 PathProgramCache]: Analyzing trace with hash 766041430, now seen corresponding path program 1 times [2022-11-16 20:24:41,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:24:41,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163235708] [2022-11-16 20:24:41,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:24:41,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:24:41,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:24:42,136 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-16 20:24:42,136 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:24:42,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163235708] [2022-11-16 20:24:42,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163235708] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 20:24:42,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311873277] [2022-11-16 20:24:42,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:24:42,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:24:42,137 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c16c3c6f-e98f-4cb8-9354-ba32a1c53072/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:24:42,143 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c16c3c6f-e98f-4cb8-9354-ba32a1c53072/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:24:42,166 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c16c3c6f-e98f-4cb8-9354-ba32a1c53072/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 20:24:42,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:24:42,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 1116 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-16 20:24:42,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:24:42,517 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-16 20:24:42,517 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 20:24:42,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [311873277] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:24:42,518 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 20:24:42,518 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-16 20:24:42,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231175165] [2022-11-16 20:24:42,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:24:42,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 20:24:42,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:24:42,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 20:24:42,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-16 20:24:42,520 INFO L87 Difference]: Start difference. First operand 3605 states and 5768 transitions. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 2 states have internal predecessors, (89), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-16 20:24:43,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:24:43,242 INFO L93 Difference]: Finished difference Result 10742 states and 17689 transitions. [2022-11-16 20:24:43,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 20:24:43,243 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 2 states have internal predecessors, (89), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 143 [2022-11-16 20:24:43,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:24:43,294 INFO L225 Difference]: With dead ends: 10742 [2022-11-16 20:24:43,294 INFO L226 Difference]: Without dead ends: 7143 [2022-11-16 20:24:43,317 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-16 20:24:43,318 INFO L413 NwaCegarLoop]: 272 mSDtfsCounter, 277 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 513 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 20:24:43,319 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [277 Valid, 513 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 20:24:43,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7143 states. [2022-11-16 20:24:43,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7143 to 7121. [2022-11-16 20:24:43,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7121 states, 6040 states have (on average 1.5211920529801324) internal successors, (9188), 6065 states have internal predecessors, (9188), 840 states have call successors, (840), 240 states have call predecessors, (840), 240 states have return successors, (1320), 816 states have call predecessors, (1320), 840 states have call successors, (1320) [2022-11-16 20:24:44,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7121 states to 7121 states and 11348 transitions. [2022-11-16 20:24:44,013 INFO L78 Accepts]: Start accepts. Automaton has 7121 states and 11348 transitions. Word has length 143 [2022-11-16 20:24:44,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:24:44,014 INFO L495 AbstractCegarLoop]: Abstraction has 7121 states and 11348 transitions. [2022-11-16 20:24:44,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 2 states have internal predecessors, (89), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-16 20:24:44,014 INFO L276 IsEmpty]: Start isEmpty. Operand 7121 states and 11348 transitions. [2022-11-16 20:24:44,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-11-16 20:24:44,027 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:24:44,027 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:24:44,035 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c16c3c6f-e98f-4cb8-9354-ba32a1c53072/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-16 20:24:44,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c16c3c6f-e98f-4cb8-9354-ba32a1c53072/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:24:44,235 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:24:44,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:24:44,236 INFO L85 PathProgramCache]: Analyzing trace with hash -1791839016, now seen corresponding path program 1 times [2022-11-16 20:24:44,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:24:44,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768528708] [2022-11-16 20:24:44,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:24:44,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:24:44,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:24:44,485 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-16 20:24:44,486 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:24:44,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768528708] [2022-11-16 20:24:44,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768528708] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 20:24:44,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829609119] [2022-11-16 20:24:44,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:24:44,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:24:44,491 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c16c3c6f-e98f-4cb8-9354-ba32a1c53072/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:24:44,499 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c16c3c6f-e98f-4cb8-9354-ba32a1c53072/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:24:44,522 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c16c3c6f-e98f-4cb8-9354-ba32a1c53072/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-16 20:24:44,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:24:44,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 1110 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-16 20:24:44,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:24:44,904 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-16 20:24:44,905 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 20:24:44,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [829609119] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:24:44,905 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 20:24:44,905 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-16 20:24:44,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078925748] [2022-11-16 20:24:44,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:24:44,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 20:24:44,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:24:44,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 20:24:44,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-16 20:24:44,907 INFO L87 Difference]: Start difference. First operand 7121 states and 11348 transitions. Second operand has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 2 states have internal predecessors, (119), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-16 20:24:46,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:24:46,289 INFO L93 Difference]: Finished difference Result 21230 states and 34797 transitions. [2022-11-16 20:24:46,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 20:24:46,290 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 2 states have internal predecessors, (119), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 143 [2022-11-16 20:24:46,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:24:46,381 INFO L225 Difference]: With dead ends: 21230 [2022-11-16 20:24:46,381 INFO L226 Difference]: Without dead ends: 14115 [2022-11-16 20:24:46,414 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-16 20:24:46,414 INFO L413 NwaCegarLoop]: 272 mSDtfsCounter, 247 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 513 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 20:24:46,415 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [247 Valid, 513 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 20:24:46,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14115 states. [2022-11-16 20:24:47,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14115 to 14073. [2022-11-16 20:24:47,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14073 states, 11956 states have (on average 1.5165607226497155) internal successors, (18132), 12005 states have internal predecessors, (18132), 1636 states have call successors, (1636), 480 states have call predecessors, (1636), 480 states have return successors, (2564), 1588 states have call predecessors, (2564), 1636 states have call successors, (2564) [2022-11-16 20:24:47,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14073 states to 14073 states and 22332 transitions. [2022-11-16 20:24:47,853 INFO L78 Accepts]: Start accepts. Automaton has 14073 states and 22332 transitions. Word has length 143 [2022-11-16 20:24:47,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:24:47,855 INFO L495 AbstractCegarLoop]: Abstraction has 14073 states and 22332 transitions. [2022-11-16 20:24:47,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 2 states have internal predecessors, (119), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-16 20:24:47,856 INFO L276 IsEmpty]: Start isEmpty. Operand 14073 states and 22332 transitions. [2022-11-16 20:24:47,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-11-16 20:24:47,885 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:24:47,885 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:24:47,899 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c16c3c6f-e98f-4cb8-9354-ba32a1c53072/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-16 20:24:48,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c16c3c6f-e98f-4cb8-9354-ba32a1c53072/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-16 20:24:48,093 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:24:48,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:24:48,094 INFO L85 PathProgramCache]: Analyzing trace with hash 2043755482, now seen corresponding path program 1 times [2022-11-16 20:24:48,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:24:48,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959480680] [2022-11-16 20:24:48,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:24:48,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:24:48,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:24:48,348 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-16 20:24:48,348 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:24:48,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959480680] [2022-11-16 20:24:48,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959480680] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 20:24:48,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750562041] [2022-11-16 20:24:48,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:24:48,349 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:24:48,349 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c16c3c6f-e98f-4cb8-9354-ba32a1c53072/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:24:48,351 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c16c3c6f-e98f-4cb8-9354-ba32a1c53072/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:24:48,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c16c3c6f-e98f-4cb8-9354-ba32a1c53072/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-16 20:24:48,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:24:48,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 1104 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-16 20:24:48,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:24:48,712 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-16 20:24:48,713 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 20:24:48,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1750562041] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:24:48,713 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 20:24:48,713 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-16 20:24:48,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059418084] [2022-11-16 20:24:48,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:24:48,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 20:24:48,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:24:48,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 20:24:48,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-16 20:24:48,716 INFO L87 Difference]: Start difference. First operand 14073 states and 22332 transitions. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 2 states have internal predecessors, (98), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-16 20:24:51,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:24:51,107 INFO L93 Difference]: Finished difference Result 41966 states and 68449 transitions. [2022-11-16 20:24:51,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 20:24:51,107 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 2 states have internal predecessors, (98), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 143 [2022-11-16 20:24:51,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:24:51,353 INFO L225 Difference]: With dead ends: 41966 [2022-11-16 20:24:51,353 INFO L226 Difference]: Without dead ends: 27899 [2022-11-16 20:24:51,430 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-16 20:24:51,431 INFO L413 NwaCegarLoop]: 272 mSDtfsCounter, 268 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 513 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 20:24:51,433 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [268 Valid, 513 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 20:24:51,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27899 states. [2022-11-16 20:24:54,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27899 to 27817. [2022-11-16 20:24:54,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27817 states, 23668 states have (on average 1.5117458171370628) internal successors, (35780), 23765 states have internal predecessors, (35780), 3188 states have call successors, (3188), 960 states have call predecessors, (3188), 960 states have return successors, (4980), 3092 states have call predecessors, (4980), 3188 states have call successors, (4980) [2022-11-16 20:24:54,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27817 states to 27817 states and 43948 transitions. [2022-11-16 20:24:54,447 INFO L78 Accepts]: Start accepts. Automaton has 27817 states and 43948 transitions. Word has length 143 [2022-11-16 20:24:54,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:24:54,448 INFO L495 AbstractCegarLoop]: Abstraction has 27817 states and 43948 transitions. [2022-11-16 20:24:54,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 2 states have internal predecessors, (98), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-16 20:24:54,448 INFO L276 IsEmpty]: Start isEmpty. Operand 27817 states and 43948 transitions. [2022-11-16 20:24:54,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-11-16 20:24:54,485 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:24:54,486 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:24:54,497 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c16c3c6f-e98f-4cb8-9354-ba32a1c53072/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-16 20:24:54,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c16c3c6f-e98f-4cb8-9354-ba32a1c53072/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-16 20:24:54,693 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:24:54,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:24:54,694 INFO L85 PathProgramCache]: Analyzing trace with hash -697791976, now seen corresponding path program 1 times [2022-11-16 20:24:54,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:24:54,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902589060] [2022-11-16 20:24:54,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:24:54,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:24:54,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:24:54,897 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-16 20:24:54,897 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:24:54,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902589060] [2022-11-16 20:24:54,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902589060] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 20:24:54,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416486526] [2022-11-16 20:24:54,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:24:54,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:24:54,898 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c16c3c6f-e98f-4cb8-9354-ba32a1c53072/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:24:54,899 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c16c3c6f-e98f-4cb8-9354-ba32a1c53072/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:24:54,926 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c16c3c6f-e98f-4cb8-9354-ba32a1c53072/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-16 20:24:55,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:24:55,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 1098 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-16 20:24:55,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:24:55,280 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-16 20:24:55,280 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 20:24:55,280 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1416486526] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:24:55,281 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 20:24:55,281 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-16 20:24:55,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138407624] [2022-11-16 20:24:55,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:24:55,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 20:24:55,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:24:55,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 20:24:55,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-16 20:24:55,285 INFO L87 Difference]: Start difference. First operand 27817 states and 43948 transitions. Second operand has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 2 states have internal predecessors, (104), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-16 20:24:59,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:24:59,018 INFO L93 Difference]: Finished difference Result 82958 states and 134625 transitions. [2022-11-16 20:24:59,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 20:24:59,019 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 2 states have internal predecessors, (104), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 143 [2022-11-16 20:24:59,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:24:59,284 INFO L225 Difference]: With dead ends: 82958 [2022-11-16 20:24:59,284 INFO L226 Difference]: Without dead ends: 55147 [2022-11-16 20:24:59,384 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-16 20:24:59,385 INFO L413 NwaCegarLoop]: 272 mSDtfsCounter, 262 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 262 SdHoareTripleChecker+Valid, 513 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 20:24:59,385 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [262 Valid, 513 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 20:24:59,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55147 states. [2022-11-16 20:25:03,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55147 to 54985. [2022-11-16 20:25:03,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54985 states, 46852 states have (on average 1.506787330316742) internal successors, (70596), 47045 states have internal predecessors, (70596), 6212 states have call successors, (6212), 1920 states have call predecessors, (6212), 1920 states have return successors, (9668), 6020 states have call predecessors, (9668), 6212 states have call successors, (9668) [2022-11-16 20:25:03,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54985 states to 54985 states and 86476 transitions. [2022-11-16 20:25:03,915 INFO L78 Accepts]: Start accepts. Automaton has 54985 states and 86476 transitions. Word has length 143 [2022-11-16 20:25:03,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:25:03,915 INFO L495 AbstractCegarLoop]: Abstraction has 54985 states and 86476 transitions. [2022-11-16 20:25:03,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 2 states have internal predecessors, (104), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-16 20:25:03,916 INFO L276 IsEmpty]: Start isEmpty. Operand 54985 states and 86476 transitions. [2022-11-16 20:25:03,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-11-16 20:25:03,993 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:25:03,993 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:25:04,004 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c16c3c6f-e98f-4cb8-9354-ba32a1c53072/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-11-16 20:25:04,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c16c3c6f-e98f-4cb8-9354-ba32a1c53072/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:25:04,200 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:25:04,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:25:04,201 INFO L85 PathProgramCache]: Analyzing trace with hash 288284374, now seen corresponding path program 1 times [2022-11-16 20:25:04,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:25:04,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130254513] [2022-11-16 20:25:04,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:25:04,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:25:04,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:25:04,394 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-16 20:25:04,395 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:25:04,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130254513] [2022-11-16 20:25:04,395 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130254513] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 20:25:04,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193821253] [2022-11-16 20:25:04,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:25:04,396 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:25:04,396 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c16c3c6f-e98f-4cb8-9354-ba32a1c53072/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:25:04,397 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c16c3c6f-e98f-4cb8-9354-ba32a1c53072/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:25:04,414 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c16c3c6f-e98f-4cb8-9354-ba32a1c53072/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-16 20:25:04,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:25:04,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 1092 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-16 20:25:04,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:25:04,761 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-16 20:25:04,761 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 20:25:04,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [193821253] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:25:04,761 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 20:25:04,762 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-16 20:25:04,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50278687] [2022-11-16 20:25:04,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:25:04,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 20:25:04,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:25:04,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 20:25:04,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-16 20:25:04,764 INFO L87 Difference]: Start difference. First operand 54985 states and 86476 transitions. Second operand has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 2 states have internal predecessors, (110), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-16 20:25:11,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:25:11,702 INFO L93 Difference]: Finished difference Result 163982 states and 264721 transitions. [2022-11-16 20:25:11,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 20:25:11,703 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 2 states have internal predecessors, (110), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 143 [2022-11-16 20:25:11,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:25:12,616 INFO L225 Difference]: With dead ends: 163982 [2022-11-16 20:25:12,616 INFO L226 Difference]: Without dead ends: 109003 [2022-11-16 20:25:12,834 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-16 20:25:12,834 INFO L413 NwaCegarLoop]: 272 mSDtfsCounter, 256 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 513 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 20:25:12,835 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [256 Valid, 513 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 20:25:12,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109003 states. [2022-11-16 20:25:20,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109003 to 108681. [2022-11-16 20:25:21,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108681 states, 92740 states have (on average 1.5017036877291352) internal successors, (139268), 93125 states have internal predecessors, (139268), 12100 states have call successors, (12100), 3840 states have call predecessors, (12100), 3840 states have return successors, (18756), 11716 states have call predecessors, (18756), 12100 states have call successors, (18756)