./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.03.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada0ff56-d2b0-4096-932e-f41a9e68e7a1/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada0ff56-d2b0-4096-932e-f41a9e68e7a1/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada0ff56-d2b0-4096-932e-f41a9e68e7a1/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada0ff56-d2b0-4096-932e-f41a9e68e7a1/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.03.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada0ff56-d2b0-4096-932e-f41a9e68e7a1/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada0ff56-d2b0-4096-932e-f41a9e68e7a1/bin/utaipan-gh47qXpMRh --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a0f469ae37a514ddca8d0dce53a0af7478c9ef70fff43265912fb6cefbfb3984 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 14:45:31,359 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 14:45:31,361 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 14:45:31,380 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 14:45:31,380 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 14:45:31,381 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 14:45:31,382 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 14:45:31,384 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 14:45:31,385 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 14:45:31,386 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 14:45:31,387 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 14:45:31,388 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 14:45:31,388 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 14:45:31,389 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 14:45:31,390 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 14:45:31,391 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 14:45:31,392 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 14:45:31,393 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 14:45:31,395 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 14:45:31,396 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 14:45:31,398 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 14:45:31,399 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 14:45:31,400 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 14:45:31,401 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 14:45:31,404 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 14:45:31,404 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 14:45:31,405 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 14:45:31,405 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 14:45:31,406 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 14:45:31,407 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 14:45:31,407 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 14:45:31,408 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 14:45:31,408 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 14:45:31,409 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 14:45:31,410 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 14:45:31,410 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 14:45:31,411 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 14:45:31,411 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 14:45:31,411 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 14:45:31,412 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 14:45:31,412 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 14:45:31,413 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada0ff56-d2b0-4096-932e-f41a9e68e7a1/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 14:45:31,432 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 14:45:31,432 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 14:45:31,442 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 14:45:31,442 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 14:45:31,443 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 14:45:31,443 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 14:45:31,443 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 14:45:31,443 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 14:45:31,443 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 14:45:31,443 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 14:45:31,443 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 14:45:31,444 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 14:45:31,444 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 14:45:31,444 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 14:45:31,444 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 14:45:31,444 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 14:45:31,444 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 14:45:31,444 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 14:45:31,445 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 14:45:31,445 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 14:45:31,445 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 14:45:31,445 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 14:45:31,445 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 14:45:31,445 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 14:45:31,446 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 14:45:31,446 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 14:45:31,446 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 14:45:31,446 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 14:45:31,446 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 14:45:31,446 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 14:45:31,446 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 14:45:31,446 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 14:45:31,446 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 14:45:31,447 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 14:45:31,447 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 14:45:31,447 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 14:45:31,447 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 14:45:31,447 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 14:45:31,447 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 14:45:31,447 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 14:45:31,447 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 14:45:31,448 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_ada0ff56-d2b0-4096-932e-f41a9e68e7a1/bin/utaipan-gh47qXpMRh/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada0ff56-d2b0-4096-932e-f41a9e68e7a1/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a0f469ae37a514ddca8d0dce53a0af7478c9ef70fff43265912fb6cefbfb3984 [2022-12-14 14:45:31,611 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 14:45:31,630 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 14:45:31,632 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 14:45:31,633 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 14:45:31,634 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 14:45:31,635 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada0ff56-d2b0-4096-932e-f41a9e68e7a1/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.03.cil-2.c [2022-12-14 14:45:34,204 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 14:45:34,381 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 14:45:34,381 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada0ff56-d2b0-4096-932e-f41a9e68e7a1/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.03.cil-2.c [2022-12-14 14:45:34,388 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada0ff56-d2b0-4096-932e-f41a9e68e7a1/bin/utaipan-gh47qXpMRh/data/e1e1cbbb0/9e02eace83ca46739a96379db90eb18e/FLAG4644fa91a [2022-12-14 14:45:34,784 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada0ff56-d2b0-4096-932e-f41a9e68e7a1/bin/utaipan-gh47qXpMRh/data/e1e1cbbb0/9e02eace83ca46739a96379db90eb18e [2022-12-14 14:45:34,786 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 14:45:34,787 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 14:45:34,788 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 14:45:34,788 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 14:45:34,791 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 14:45:34,791 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 02:45:34" (1/1) ... [2022-12-14 14:45:34,792 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4721a420 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:45:34, skipping insertion in model container [2022-12-14 14:45:34,792 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 02:45:34" (1/1) ... [2022-12-14 14:45:34,797 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 14:45:34,819 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 14:45:34,918 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada0ff56-d2b0-4096-932e-f41a9e68e7a1/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.03.cil-2.c[913,926] [2022-12-14 14:45:34,945 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada0ff56-d2b0-4096-932e-f41a9e68e7a1/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.03.cil-2.c[5977,5990] [2022-12-14 14:45:34,971 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 14:45:34,980 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 14:45:34,988 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada0ff56-d2b0-4096-932e-f41a9e68e7a1/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.03.cil-2.c[913,926] [2022-12-14 14:45:34,999 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada0ff56-d2b0-4096-932e-f41a9e68e7a1/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.03.cil-2.c[5977,5990] [2022-12-14 14:45:35,017 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 14:45:35,029 INFO L208 MainTranslator]: Completed translation [2022-12-14 14:45:35,029 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:45:35 WrapperNode [2022-12-14 14:45:35,029 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 14:45:35,030 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 14:45:35,030 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 14:45:35,030 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 14:45:35,035 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:45:35" (1/1) ... [2022-12-14 14:45:35,042 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:45:35" (1/1) ... [2022-12-14 14:45:35,065 INFO L138 Inliner]: procedures = 54, calls = 57, calls flagged for inlining = 29, calls inlined = 29, statements flattened = 533 [2022-12-14 14:45:35,065 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 14:45:35,066 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 14:45:35,066 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 14:45:35,066 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 14:45:35,072 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:45:35" (1/1) ... [2022-12-14 14:45:35,072 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:45:35" (1/1) ... [2022-12-14 14:45:35,074 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:45:35" (1/1) ... [2022-12-14 14:45:35,075 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:45:35" (1/1) ... [2022-12-14 14:45:35,080 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:45:35" (1/1) ... [2022-12-14 14:45:35,085 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:45:35" (1/1) ... [2022-12-14 14:45:35,086 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:45:35" (1/1) ... [2022-12-14 14:45:35,087 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:45:35" (1/1) ... [2022-12-14 14:45:35,090 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 14:45:35,090 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 14:45:35,091 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 14:45:35,091 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 14:45:35,091 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:45:35" (1/1) ... [2022-12-14 14:45:35,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 14:45:35,104 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada0ff56-d2b0-4096-932e-f41a9e68e7a1/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:45:35,113 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada0ff56-d2b0-4096-932e-f41a9e68e7a1/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 14:45:35,115 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada0ff56-d2b0-4096-932e-f41a9e68e7a1/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 14:45:35,146 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 14:45:35,146 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-12-14 14:45:35,147 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-12-14 14:45:35,147 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify_threads [2022-12-14 14:45:35,147 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify_threads [2022-12-14 14:45:35,147 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2022-12-14 14:45:35,147 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2022-12-14 14:45:35,147 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2022-12-14 14:45:35,147 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2022-12-14 14:45:35,147 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2022-12-14 14:45:35,147 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2022-12-14 14:45:35,148 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2022-12-14 14:45:35,148 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2022-12-14 14:45:35,148 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2022-12-14 14:45:35,148 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2022-12-14 14:45:35,148 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 14:45:35,148 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2022-12-14 14:45:35,148 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2022-12-14 14:45:35,148 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 14:45:35,148 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 14:45:35,149 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2022-12-14 14:45:35,149 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2022-12-14 14:45:35,217 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 14:45:35,218 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 14:45:35,612 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 14:45:35,721 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 14:45:35,721 INFO L300 CfgBuilder]: Removed 10 assume(true) statements. [2022-12-14 14:45:35,723 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 02:45:35 BoogieIcfgContainer [2022-12-14 14:45:35,723 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 14:45:35,726 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 14:45:35,726 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 14:45:35,728 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 14:45:35,728 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 02:45:34" (1/3) ... [2022-12-14 14:45:35,729 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e156975 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 02:45:35, skipping insertion in model container [2022-12-14 14:45:35,729 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:45:35" (2/3) ... [2022-12-14 14:45:35,729 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e156975 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 02:45:35, skipping insertion in model container [2022-12-14 14:45:35,729 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 02:45:35" (3/3) ... [2022-12-14 14:45:35,731 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_1.cil-2+token_ring.03.cil-2.c [2022-12-14 14:45:35,746 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 14:45:35,746 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-12-14 14:45:35,789 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 14:45:35,794 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;@12cebaeb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 14:45:35,794 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-12-14 14:45:35,797 INFO L276 IsEmpty]: Start isEmpty. Operand has 140 states, 105 states have (on average 1.5333333333333334) internal successors, (161), 110 states have internal predecessors, (161), 23 states have call successors, (23), 9 states have call predecessors, (23), 9 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) [2022-12-14 14:45:35,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-12-14 14:45:35,805 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:45:35,806 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] [2022-12-14 14:45:35,806 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:45:35,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:45:35,811 INFO L85 PathProgramCache]: Analyzing trace with hash -1629192851, now seen corresponding path program 1 times [2022-12-14 14:45:35,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:45:35,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829984385] [2022-12-14 14:45:35,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:45:35,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:45:35,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:45:36,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 14:45:36,066 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:45:36,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829984385] [2022-12-14 14:45:36,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829984385] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:45:36,067 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:45:36,067 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 14:45:36,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807395957] [2022-12-14 14:45:36,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:45:36,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 14:45:36,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:45:36,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 14:45:36,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 14:45:36,099 INFO L87 Difference]: Start difference. First operand has 140 states, 105 states have (on average 1.5333333333333334) internal successors, (161), 110 states have internal predecessors, (161), 23 states have call successors, (23), 9 states have call predecessors, (23), 9 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 14:45:36,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:45:36,238 INFO L93 Difference]: Finished difference Result 313 states and 462 transitions. [2022-12-14 14:45:36,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 14:45:36,240 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 28 [2022-12-14 14:45:36,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:45:36,250 INFO L225 Difference]: With dead ends: 313 [2022-12-14 14:45:36,250 INFO L226 Difference]: Without dead ends: 173 [2022-12-14 14:45:36,254 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 14:45:36,258 INFO L413 NwaCegarLoop]: 178 mSDtfsCounter, 174 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 14:45:36,259 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [174 Valid, 233 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 14:45:36,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-12-14 14:45:36,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 169. [2022-12-14 14:45:36,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 131 states have (on average 1.4351145038167938) internal successors, (188), 134 states have internal predecessors, (188), 26 states have call successors, (26), 11 states have call predecessors, (26), 10 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-12-14 14:45:36,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 238 transitions. [2022-12-14 14:45:36,301 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 238 transitions. Word has length 28 [2022-12-14 14:45:36,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:45:36,301 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 238 transitions. [2022-12-14 14:45:36,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 14:45:36,301 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 238 transitions. [2022-12-14 14:45:36,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-12-14 14:45:36,303 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:45:36,303 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] [2022-12-14 14:45:36,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 14:45:36,304 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:45:36,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:45:36,304 INFO L85 PathProgramCache]: Analyzing trace with hash 1216141261, now seen corresponding path program 1 times [2022-12-14 14:45:36,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:45:36,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707024988] [2022-12-14 14:45:36,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:45:36,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:45:36,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:45:36,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 14:45:36,362 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:45:36,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707024988] [2022-12-14 14:45:36,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707024988] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:45:36,362 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:45:36,362 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 14:45:36,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801111514] [2022-12-14 14:45:36,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:45:36,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 14:45:36,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:45:36,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 14:45:36,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 14:45:36,365 INFO L87 Difference]: Start difference. First operand 169 states and 238 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 14:45:36,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:45:36,448 INFO L93 Difference]: Finished difference Result 325 states and 455 transitions. [2022-12-14 14:45:36,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 14:45:36,448 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 29 [2022-12-14 14:45:36,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:45:36,451 INFO L225 Difference]: With dead ends: 325 [2022-12-14 14:45:36,451 INFO L226 Difference]: Without dead ends: 244 [2022-12-14 14:45:36,452 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 14:45:36,453 INFO L413 NwaCegarLoop]: 165 mSDtfsCounter, 172 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 14:45:36,454 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [172 Valid, 218 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 14:45:36,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2022-12-14 14:45:36,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 240. [2022-12-14 14:45:36,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 191 states have (on average 1.4083769633507854) internal successors, (269), 194 states have internal predecessors, (269), 33 states have call successors, (33), 15 states have call predecessors, (33), 14 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2022-12-14 14:45:36,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 333 transitions. [2022-12-14 14:45:36,483 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 333 transitions. Word has length 29 [2022-12-14 14:45:36,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:45:36,483 INFO L495 AbstractCegarLoop]: Abstraction has 240 states and 333 transitions. [2022-12-14 14:45:36,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 14:45:36,484 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 333 transitions. [2022-12-14 14:45:36,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-12-14 14:45:36,485 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:45:36,485 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] [2022-12-14 14:45:36,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 14:45:36,486 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:45:36,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:45:36,487 INFO L85 PathProgramCache]: Analyzing trace with hash -46985189, now seen corresponding path program 1 times [2022-12-14 14:45:36,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:45:36,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137936071] [2022-12-14 14:45:36,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:45:36,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:45:36,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:45:36,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 14:45:36,536 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:45:36,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137936071] [2022-12-14 14:45:36,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137936071] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:45:36,537 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:45:36,537 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 14:45:36,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076078976] [2022-12-14 14:45:36,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:45:36,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 14:45:36,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:45:36,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 14:45:36,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 14:45:36,538 INFO L87 Difference]: Start difference. First operand 240 states and 333 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 14:45:36,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:45:36,623 INFO L93 Difference]: Finished difference Result 480 states and 661 transitions. [2022-12-14 14:45:36,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 14:45:36,623 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 30 [2022-12-14 14:45:36,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:45:36,626 INFO L225 Difference]: With dead ends: 480 [2022-12-14 14:45:36,626 INFO L226 Difference]: Without dead ends: 328 [2022-12-14 14:45:36,627 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 14:45:36,628 INFO L413 NwaCegarLoop]: 175 mSDtfsCounter, 46 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 14:45:36,628 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 321 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 14:45:36,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2022-12-14 14:45:36,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 314. [2022-12-14 14:45:36,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 254 states have (on average 1.3937007874015748) internal successors, (354), 259 states have internal predecessors, (354), 39 states have call successors, (39), 20 states have call predecessors, (39), 19 states have return successors, (37), 35 states have call predecessors, (37), 37 states have call successors, (37) [2022-12-14 14:45:36,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 430 transitions. [2022-12-14 14:45:36,657 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 430 transitions. Word has length 30 [2022-12-14 14:45:36,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:45:36,657 INFO L495 AbstractCegarLoop]: Abstraction has 314 states and 430 transitions. [2022-12-14 14:45:36,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 14:45:36,657 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 430 transitions. [2022-12-14 14:45:36,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-12-14 14:45:36,659 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:45:36,659 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:45:36,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 14:45:36,659 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:45:36,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:45:36,660 INFO L85 PathProgramCache]: Analyzing trace with hash 275994321, now seen corresponding path program 1 times [2022-12-14 14:45:36,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:45:36,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090274226] [2022-12-14 14:45:36,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:45:36,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:45:36,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:45:36,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 14:45:36,754 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:45:36,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090274226] [2022-12-14 14:45:36,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090274226] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:45:36,755 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:45:36,755 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 14:45:36,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399675174] [2022-12-14 14:45:36,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:45:36,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 14:45:36,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:45:36,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 14:45:36,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 14:45:36,757 INFO L87 Difference]: Start difference. First operand 314 states and 430 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 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) [2022-12-14 14:45:36,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:45:36,945 INFO L93 Difference]: Finished difference Result 471 states and 667 transitions. [2022-12-14 14:45:36,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 14:45:36,945 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 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 40 [2022-12-14 14:45:36,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:45:36,949 INFO L225 Difference]: With dead ends: 471 [2022-12-14 14:45:36,949 INFO L226 Difference]: Without dead ends: 389 [2022-12-14 14:45:36,950 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 14:45:36,951 INFO L413 NwaCegarLoop]: 241 mSDtfsCounter, 273 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 410 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 14:45:36,952 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [273 Valid, 410 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 14:45:36,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2022-12-14 14:45:36,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 388. [2022-12-14 14:45:36,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 309 states have (on average 1.3851132686084142) internal successors, (428), 315 states have internal predecessors, (428), 52 states have call successors, (52), 26 states have call predecessors, (52), 25 states have return successors, (50), 47 states have call predecessors, (50), 50 states have call successors, (50) [2022-12-14 14:45:36,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 530 transitions. [2022-12-14 14:45:36,984 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 530 transitions. Word has length 40 [2022-12-14 14:45:36,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:45:36,984 INFO L495 AbstractCegarLoop]: Abstraction has 388 states and 530 transitions. [2022-12-14 14:45:36,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 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) [2022-12-14 14:45:36,985 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 530 transitions. [2022-12-14 14:45:36,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-12-14 14:45:36,986 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:45:36,987 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-12-14 14:45:36,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-14 14:45:36,987 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:45:36,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:45:36,988 INFO L85 PathProgramCache]: Analyzing trace with hash -1539890165, now seen corresponding path program 1 times [2022-12-14 14:45:36,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:45:36,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959246861] [2022-12-14 14:45:36,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:45:36,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:45:37,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:45:37,043 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 14:45:37,043 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:45:37,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959246861] [2022-12-14 14:45:37,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959246861] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:45:37,044 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:45:37,044 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 14:45:37,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585033787] [2022-12-14 14:45:37,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:45:37,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 14:45:37,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:45:37,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 14:45:37,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 14:45:37,045 INFO L87 Difference]: Start difference. First operand 388 states and 530 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, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-14 14:45:37,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:45:37,121 INFO L93 Difference]: Finished difference Result 551 states and 748 transitions. [2022-12-14 14:45:37,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 14:45:37,121 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, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 43 [2022-12-14 14:45:37,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:45:37,123 INFO L225 Difference]: With dead ends: 551 [2022-12-14 14:45:37,124 INFO L226 Difference]: Without dead ends: 393 [2022-12-14 14:45:37,124 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 14:45:37,125 INFO L413 NwaCegarLoop]: 193 mSDtfsCounter, 32 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 14:45:37,126 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 351 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 14:45:37,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2022-12-14 14:45:37,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 382. [2022-12-14 14:45:37,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 303 states have (on average 1.3663366336633664) internal successors, (414), 309 states have internal predecessors, (414), 52 states have call successors, (52), 26 states have call predecessors, (52), 25 states have return successors, (50), 47 states have call predecessors, (50), 50 states have call successors, (50) [2022-12-14 14:45:37,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 516 transitions. [2022-12-14 14:45:37,152 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 516 transitions. Word has length 43 [2022-12-14 14:45:37,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:45:37,153 INFO L495 AbstractCegarLoop]: Abstraction has 382 states and 516 transitions. [2022-12-14 14:45:37,153 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, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-14 14:45:37,153 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 516 transitions. [2022-12-14 14:45:37,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-12-14 14:45:37,154 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:45:37,154 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-12-14 14:45:37,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-14 14:45:37,155 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:45:37,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:45:37,159 INFO L85 PathProgramCache]: Analyzing trace with hash -1686473578, now seen corresponding path program 1 times [2022-12-14 14:45:37,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:45:37,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75696273] [2022-12-14 14:45:37,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:45:37,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:45:37,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:45:37,194 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 14:45:37,195 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:45:37,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75696273] [2022-12-14 14:45:37,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75696273] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:45:37,195 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:45:37,195 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 14:45:37,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543813013] [2022-12-14 14:45:37,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:45:37,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 14:45:37,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:45:37,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 14:45:37,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 14:45:37,197 INFO L87 Difference]: Start difference. First operand 382 states and 516 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-12-14 14:45:37,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:45:37,270 INFO L93 Difference]: Finished difference Result 631 states and 840 transitions. [2022-12-14 14:45:37,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 14:45:37,271 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 46 [2022-12-14 14:45:37,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:45:37,273 INFO L225 Difference]: With dead ends: 631 [2022-12-14 14:45:37,273 INFO L226 Difference]: Without dead ends: 428 [2022-12-14 14:45:37,274 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 14:45:37,275 INFO L413 NwaCegarLoop]: 163 mSDtfsCounter, 157 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 14:45:37,275 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 215 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 14:45:37,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2022-12-14 14:45:37,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 428. [2022-12-14 14:45:37,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 428 states, 342 states have (on average 1.3362573099415205) internal successors, (457), 348 states have internal predecessors, (457), 56 states have call successors, (56), 29 states have call predecessors, (56), 28 states have return successors, (54), 51 states have call predecessors, (54), 54 states have call successors, (54) [2022-12-14 14:45:37,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 567 transitions. [2022-12-14 14:45:37,305 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 567 transitions. Word has length 46 [2022-12-14 14:45:37,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:45:37,305 INFO L495 AbstractCegarLoop]: Abstraction has 428 states and 567 transitions. [2022-12-14 14:45:37,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-12-14 14:45:37,306 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 567 transitions. [2022-12-14 14:45:37,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-12-14 14:45:37,307 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:45:37,307 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-12-14 14:45:37,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-14 14:45:37,307 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:45:37,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:45:37,308 INFO L85 PathProgramCache]: Analyzing trace with hash -793778124, now seen corresponding path program 1 times [2022-12-14 14:45:37,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:45:37,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923304686] [2022-12-14 14:45:37,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:45:37,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:45:37,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:45:37,384 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-14 14:45:37,384 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:45:37,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923304686] [2022-12-14 14:45:37,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923304686] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:45:37,384 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:45:37,384 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 14:45:37,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43059113] [2022-12-14 14:45:37,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:45:37,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 14:45:37,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:45:37,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 14:45:37,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 14:45:37,386 INFO L87 Difference]: Start difference. First operand 428 states and 567 transitions. Second operand has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-14 14:45:37,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:45:37,522 INFO L93 Difference]: Finished difference Result 468 states and 614 transitions. [2022-12-14 14:45:37,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 14:45:37,523 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 47 [2022-12-14 14:45:37,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:45:37,526 INFO L225 Difference]: With dead ends: 468 [2022-12-14 14:45:37,526 INFO L226 Difference]: Without dead ends: 465 [2022-12-14 14:45:37,526 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 14:45:37,527 INFO L413 NwaCegarLoop]: 172 mSDtfsCounter, 294 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 14:45:37,527 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [294 Valid, 213 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 14:45:37,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2022-12-14 14:45:37,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 427. [2022-12-14 14:45:37,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 427 states, 342 states have (on average 1.3304093567251463) internal successors, (455), 347 states have internal predecessors, (455), 55 states have call successors, (55), 29 states have call predecessors, (55), 28 states have return successors, (54), 51 states have call predecessors, (54), 54 states have call successors, (54) [2022-12-14 14:45:37,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 564 transitions. [2022-12-14 14:45:37,566 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 564 transitions. Word has length 47 [2022-12-14 14:45:37,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:45:37,566 INFO L495 AbstractCegarLoop]: Abstraction has 427 states and 564 transitions. [2022-12-14 14:45:37,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-14 14:45:37,566 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 564 transitions. [2022-12-14 14:45:37,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-12-14 14:45:37,568 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:45:37,568 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:45:37,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-14 14:45:37,568 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:45:37,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:45:37,569 INFO L85 PathProgramCache]: Analyzing trace with hash 1161949145, now seen corresponding path program 1 times [2022-12-14 14:45:37,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:45:37,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543758646] [2022-12-14 14:45:37,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:45:37,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:45:37,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:45:37,699 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-14 14:45:37,699 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:45:37,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543758646] [2022-12-14 14:45:37,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543758646] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:45:37,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721072897] [2022-12-14 14:45:37,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:45:37,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:45:37,700 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada0ff56-d2b0-4096-932e-f41a9e68e7a1/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:45:37,701 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada0ff56-d2b0-4096-932e-f41a9e68e7a1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:45:37,702 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada0ff56-d2b0-4096-932e-f41a9e68e7a1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 14:45:37,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:45:37,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 14:45:37,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:45:38,031 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 14:45:38,032 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 14:45:38,136 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-14 14:45:38,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1721072897] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 14:45:38,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1737642997] [2022-12-14 14:45:38,154 INFO L159 IcfgInterpreter]: Started Sifa with 40 locations of interest [2022-12-14 14:45:38,154 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 14:45:38,158 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 14:45:38,162 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 14:45:38,163 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 14:45:39,709 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 95 for LOIs [2022-12-14 14:45:39,716 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 110 for LOIs [2022-12-14 14:45:39,724 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify_threads with input of size 236 for LOIs [2022-12-14 14:45:40,584 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 14:45:49,505 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8564#(and (= ~t1_pc~0 0) (= ~T1_E~0 2) (= ~m_st~0 0) (= ~q_free~0 1) (<= 0 ~p_num_write~0) (= ~T2_E~0 2) (= 1 ~c_dr_i~0) (= ~E_3~0 2) (= 0 ~t3_pc~0) (= ~t2_i~0 0) (= ~t1_st~0 0) (= ~c_num_read~0 1) (<= ~p_num_write~0 1) (= ~m_i~0 0) (not (= ~c_num_read~0 ~p_num_write~0)) (<= 0 (+ ~q_buf_0~0 2147483648)) (= ~p_dw_pc~0 1) (= ~q_write_ev~0 2) (= ~E_2~0 2) (= ~p_dw_st~0 0) (= ~c_last_read~0 ~q_buf_0~0) (= ~T3_E~0 2) (= ~local~0 0) (= ~t3_i~0 0) (= ~token~0 0) (= ~q_read_ev~0 2) (= ~c_dr_pc~0 0) (= ~m_pc~0 0) (= ~p_dw_i~0 1) (= 0 ~t2_pc~0) (= |#NULL.offset| 0) (= ~c_last_read~0 ~p_last_write~0) (<= ~p_last_write~0 2147483647) (= ~E_M~0 2) (= ~a_t~0 0) (= 0 ~t2_st~0) (= ~E_1~0 2) (= 0 ~t3_st~0) (= ~M_E~0 2) (<= 0 |#StackHeapBarrier|) (= ~t1_i~0 0) (= |#NULL.base| 0))' at error location [2022-12-14 14:45:49,505 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 14:45:49,505 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 14:45:49,505 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 7 [2022-12-14 14:45:49,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022443355] [2022-12-14 14:45:49,505 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 14:45:49,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 14:45:49,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:45:49,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 14:45:49,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1072, Unknown=0, NotChecked=0, Total=1190 [2022-12-14 14:45:49,506 INFO L87 Difference]: Start difference. First operand 427 states and 564 transitions. Second operand has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 6 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-12-14 14:45:49,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:45:49,734 INFO L93 Difference]: Finished difference Result 870 states and 1132 transitions. [2022-12-14 14:45:49,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 14:45:49,735 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 6 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 48 [2022-12-14 14:45:49,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:45:49,737 INFO L225 Difference]: With dead ends: 870 [2022-12-14 14:45:49,738 INFO L226 Difference]: Without dead ends: 867 [2022-12-14 14:45:49,738 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 110 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=118, Invalid=1072, Unknown=0, NotChecked=0, Total=1190 [2022-12-14 14:45:49,739 INFO L413 NwaCegarLoop]: 226 mSDtfsCounter, 408 mSDsluCounter, 433 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 408 SdHoareTripleChecker+Valid, 659 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 14:45:49,739 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [408 Valid, 659 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 14:45:49,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 867 states. [2022-12-14 14:45:49,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 867 to 636. [2022-12-14 14:45:49,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 636 states, 519 states have (on average 1.325626204238921) internal successors, (688), 526 states have internal predecessors, (688), 74 states have call successors, (74), 42 states have call predecessors, (74), 41 states have return successors, (73), 68 states have call predecessors, (73), 73 states have call successors, (73) [2022-12-14 14:45:49,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 636 states to 636 states and 835 transitions. [2022-12-14 14:45:49,772 INFO L78 Accepts]: Start accepts. Automaton has 636 states and 835 transitions. Word has length 48 [2022-12-14 14:45:49,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:45:49,772 INFO L495 AbstractCegarLoop]: Abstraction has 636 states and 835 transitions. [2022-12-14 14:45:49,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 6 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-12-14 14:45:49,772 INFO L276 IsEmpty]: Start isEmpty. Operand 636 states and 835 transitions. [2022-12-14 14:45:49,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-12-14 14:45:49,774 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:45:49,774 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:45:49,780 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada0ff56-d2b0-4096-932e-f41a9e68e7a1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 14:45:49,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada0ff56-d2b0-4096-932e-f41a9e68e7a1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-12-14 14:45:49,976 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:45:49,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:45:49,977 INFO L85 PathProgramCache]: Analyzing trace with hash 1379779337, now seen corresponding path program 2 times [2022-12-14 14:45:49,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:45:49,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274413941] [2022-12-14 14:45:49,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:45:49,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:45:50,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:45:50,081 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-12-14 14:45:50,082 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:45:50,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274413941] [2022-12-14 14:45:50,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274413941] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:45:50,083 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:45:50,083 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 14:45:50,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716217942] [2022-12-14 14:45:50,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:45:50,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 14:45:50,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:45:50,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 14:45:50,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 14:45:50,089 INFO L87 Difference]: Start difference. First operand 636 states and 835 transitions. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-12-14 14:45:50,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:45:50,191 INFO L93 Difference]: Finished difference Result 966 states and 1268 transitions. [2022-12-14 14:45:50,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 14:45:50,191 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 61 [2022-12-14 14:45:50,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:45:50,193 INFO L225 Difference]: With dead ends: 966 [2022-12-14 14:45:50,193 INFO L226 Difference]: Without dead ends: 578 [2022-12-14 14:45:50,194 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 14:45:50,194 INFO L413 NwaCegarLoop]: 183 mSDtfsCounter, 170 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 14:45:50,194 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [170 Valid, 228 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 14:45:50,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 578 states. [2022-12-14 14:45:50,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 578 to 569. [2022-12-14 14:45:50,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 569 states, 462 states have (on average 1.3138528138528138) internal successors, (607), 470 states have internal predecessors, (607), 68 states have call successors, (68), 38 states have call predecessors, (68), 37 states have return successors, (67), 61 states have call predecessors, (67), 67 states have call successors, (67) [2022-12-14 14:45:50,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 569 states to 569 states and 742 transitions. [2022-12-14 14:45:50,222 INFO L78 Accepts]: Start accepts. Automaton has 569 states and 742 transitions. Word has length 61 [2022-12-14 14:45:50,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:45:50,222 INFO L495 AbstractCegarLoop]: Abstraction has 569 states and 742 transitions. [2022-12-14 14:45:50,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-12-14 14:45:50,222 INFO L276 IsEmpty]: Start isEmpty. Operand 569 states and 742 transitions. [2022-12-14 14:45:50,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-12-14 14:45:50,224 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:45:50,224 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:45:50,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-14 14:45:50,224 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:45:50,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:45:50,224 INFO L85 PathProgramCache]: Analyzing trace with hash -1254730738, now seen corresponding path program 1 times [2022-12-14 14:45:50,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:45:50,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456346933] [2022-12-14 14:45:50,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:45:50,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:45:50,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:45:50,278 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 14:45:50,279 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:45:50,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456346933] [2022-12-14 14:45:50,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456346933] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:45:50,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098231091] [2022-12-14 14:45:50,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:45:50,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:45:50,279 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada0ff56-d2b0-4096-932e-f41a9e68e7a1/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:45:50,280 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada0ff56-d2b0-4096-932e-f41a9e68e7a1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:45:50,281 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada0ff56-d2b0-4096-932e-f41a9e68e7a1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 14:45:50,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:45:50,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 422 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 14:45:50,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:45:50,381 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-14 14:45:50,382 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 14:45:50,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1098231091] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:45:50,382 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 14:45:50,382 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 14:45:50,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224010327] [2022-12-14 14:45:50,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:45:50,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 14:45:50,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:45:50,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 14:45:50,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 14:45:50,383 INFO L87 Difference]: Start difference. First operand 569 states and 742 transitions. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 2 states have internal predecessors, (46), 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) [2022-12-14 14:45:50,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:45:50,469 INFO L93 Difference]: Finished difference Result 874 states and 1175 transitions. [2022-12-14 14:45:50,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 14:45:50,470 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 2 states have internal predecessors, (46), 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 73 [2022-12-14 14:45:50,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:45:50,472 INFO L225 Difference]: With dead ends: 874 [2022-12-14 14:45:50,472 INFO L226 Difference]: Without dead ends: 718 [2022-12-14 14:45:50,472 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 14:45:50,473 INFO L413 NwaCegarLoop]: 192 mSDtfsCounter, 163 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 14:45:50,473 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [163 Valid, 282 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 14:45:50,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 718 states. [2022-12-14 14:45:50,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 718 to 714. [2022-12-14 14:45:50,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 714 states, 571 states have (on average 1.3239929947460596) internal successors, (756), 580 states have internal predecessors, (756), 92 states have call successors, (92), 50 states have call predecessors, (92), 49 states have return successors, (91), 84 states have call predecessors, (91), 91 states have call successors, (91) [2022-12-14 14:45:50,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 714 states to 714 states and 939 transitions. [2022-12-14 14:45:50,515 INFO L78 Accepts]: Start accepts. Automaton has 714 states and 939 transitions. Word has length 73 [2022-12-14 14:45:50,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:45:50,515 INFO L495 AbstractCegarLoop]: Abstraction has 714 states and 939 transitions. [2022-12-14 14:45:50,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 2 states have internal predecessors, (46), 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) [2022-12-14 14:45:50,515 INFO L276 IsEmpty]: Start isEmpty. Operand 714 states and 939 transitions. [2022-12-14 14:45:50,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-12-14 14:45:50,517 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:45:50,517 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:45:50,522 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada0ff56-d2b0-4096-932e-f41a9e68e7a1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 14:45:50,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada0ff56-d2b0-4096-932e-f41a9e68e7a1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-14 14:45:50,717 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:45:50,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:45:50,718 INFO L85 PathProgramCache]: Analyzing trace with hash -608195700, now seen corresponding path program 1 times [2022-12-14 14:45:50,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:45:50,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923566587] [2022-12-14 14:45:50,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:45:50,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:45:50,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:45:50,896 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-14 14:45:50,896 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:45:50,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923566587] [2022-12-14 14:45:50,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923566587] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:45:50,896 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:45:50,896 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 14:45:50,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101162171] [2022-12-14 14:45:50,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:45:50,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 14:45:50,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:45:50,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 14:45:50,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 14:45:50,898 INFO L87 Difference]: Start difference. First operand 714 states and 939 transitions. Second operand has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 14:45:51,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:45:51,197 INFO L93 Difference]: Finished difference Result 1374 states and 1856 transitions. [2022-12-14 14:45:51,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-14 14:45:51,197 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 73 [2022-12-14 14:45:51,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:45:51,200 INFO L225 Difference]: With dead ends: 1374 [2022-12-14 14:45:51,200 INFO L226 Difference]: Without dead ends: 1074 [2022-12-14 14:45:51,201 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2022-12-14 14:45:51,201 INFO L413 NwaCegarLoop]: 160 mSDtfsCounter, 407 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 423 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 14:45:51,202 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [423 Valid, 404 Invalid, 330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 14:45:51,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1074 states. [2022-12-14 14:45:51,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1074 to 988. [2022-12-14 14:45:51,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 988 states, 775 states have (on average 1.3290322580645162) internal successors, (1030), 786 states have internal predecessors, (1030), 138 states have call successors, (138), 74 states have call predecessors, (138), 73 states have return successors, (137), 128 states have call predecessors, (137), 137 states have call successors, (137) [2022-12-14 14:45:51,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 988 states to 988 states and 1305 transitions. [2022-12-14 14:45:51,262 INFO L78 Accepts]: Start accepts. Automaton has 988 states and 1305 transitions. Word has length 73 [2022-12-14 14:45:51,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:45:51,262 INFO L495 AbstractCegarLoop]: Abstraction has 988 states and 1305 transitions. [2022-12-14 14:45:51,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-12-14 14:45:51,262 INFO L276 IsEmpty]: Start isEmpty. Operand 988 states and 1305 transitions. [2022-12-14 14:45:51,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-12-14 14:45:51,264 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:45:51,264 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:45:51,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-14 14:45:51,264 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:45:51,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:45:51,265 INFO L85 PathProgramCache]: Analyzing trace with hash -1565909521, now seen corresponding path program 1 times [2022-12-14 14:45:51,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:45:51,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314455839] [2022-12-14 14:45:51,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:45:51,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:45:51,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:45:51,308 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-14 14:45:51,309 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:45:51,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314455839] [2022-12-14 14:45:51,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314455839] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:45:51,309 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:45:51,309 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 14:45:51,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878702176] [2022-12-14 14:45:51,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:45:51,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 14:45:51,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:45:51,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 14:45:51,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 14:45:51,310 INFO L87 Difference]: Start difference. First operand 988 states and 1305 transitions. Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-12-14 14:45:51,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:45:51,452 INFO L93 Difference]: Finished difference Result 1432 states and 1920 transitions. [2022-12-14 14:45:51,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 14:45:51,452 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 74 [2022-12-14 14:45:51,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:45:51,459 INFO L225 Difference]: With dead ends: 1432 [2022-12-14 14:45:51,459 INFO L226 Difference]: Without dead ends: 1134 [2022-12-14 14:45:51,461 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 14:45:51,461 INFO L413 NwaCegarLoop]: 206 mSDtfsCounter, 45 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 14:45:51,461 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 366 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 14:45:51,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1134 states. [2022-12-14 14:45:51,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1134 to 1066. [2022-12-14 14:45:51,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1066 states, 845 states have (on average 1.3514792899408283) internal successors, (1142), 856 states have internal predecessors, (1142), 142 states have call successors, (142), 78 states have call predecessors, (142), 77 states have return successors, (141), 132 states have call predecessors, (141), 141 states have call successors, (141) [2022-12-14 14:45:51,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1066 states to 1066 states and 1425 transitions. [2022-12-14 14:45:51,529 INFO L78 Accepts]: Start accepts. Automaton has 1066 states and 1425 transitions. Word has length 74 [2022-12-14 14:45:51,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:45:51,530 INFO L495 AbstractCegarLoop]: Abstraction has 1066 states and 1425 transitions. [2022-12-14 14:45:51,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-12-14 14:45:51,530 INFO L276 IsEmpty]: Start isEmpty. Operand 1066 states and 1425 transitions. [2022-12-14 14:45:51,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-12-14 14:45:51,532 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:45:51,532 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:45:51,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-14 14:45:51,533 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:45:51,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:45:51,533 INFO L85 PathProgramCache]: Analyzing trace with hash -877789898, now seen corresponding path program 1 times [2022-12-14 14:45:51,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:45:51,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405050126] [2022-12-14 14:45:51,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:45:51,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:45:51,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:45:51,636 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 16 proven. 14 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 14:45:51,636 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:45:51,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405050126] [2022-12-14 14:45:51,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405050126] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:45:51,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320081572] [2022-12-14 14:45:51,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:45:51,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:45:51,637 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada0ff56-d2b0-4096-932e-f41a9e68e7a1/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:45:51,638 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada0ff56-d2b0-4096-932e-f41a9e68e7a1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:45:51,639 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada0ff56-d2b0-4096-932e-f41a9e68e7a1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 14:45:51,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:45:51,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 14:45:51,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:45:51,718 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 14:45:51,718 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 14:45:51,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320081572] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:45:51,718 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 14:45:51,718 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-12-14 14:45:51,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951616764] [2022-12-14 14:45:51,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:45:51,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 14:45:51,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:45:51,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 14:45:51,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 14:45:51,720 INFO L87 Difference]: Start difference. First operand 1066 states and 1425 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-12-14 14:45:51,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:45:51,805 INFO L93 Difference]: Finished difference Result 1193 states and 1584 transitions. [2022-12-14 14:45:51,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 14:45:51,805 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 73 [2022-12-14 14:45:51,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:45:51,807 INFO L225 Difference]: With dead ends: 1193 [2022-12-14 14:45:51,807 INFO L226 Difference]: Without dead ends: 659 [2022-12-14 14:45:51,808 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 14:45:51,808 INFO L413 NwaCegarLoop]: 175 mSDtfsCounter, 25 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 14:45:51,809 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 322 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 14:45:51,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 659 states. [2022-12-14 14:45:51,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 659 to 659. [2022-12-14 14:45:51,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 659 states, 502 states have (on average 1.3944223107569722) internal successors, (700), 507 states have internal predecessors, (700), 104 states have call successors, (104), 52 states have call predecessors, (104), 52 states have return successors, (104), 100 states have call predecessors, (104), 104 states have call successors, (104) [2022-12-14 14:45:51,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 659 states to 659 states and 908 transitions. [2022-12-14 14:45:51,856 INFO L78 Accepts]: Start accepts. Automaton has 659 states and 908 transitions. Word has length 73 [2022-12-14 14:45:51,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:45:51,856 INFO L495 AbstractCegarLoop]: Abstraction has 659 states and 908 transitions. [2022-12-14 14:45:51,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-12-14 14:45:51,857 INFO L276 IsEmpty]: Start isEmpty. Operand 659 states and 908 transitions. [2022-12-14 14:45:51,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-12-14 14:45:51,858 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:45:51,858 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:45:51,864 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada0ff56-d2b0-4096-932e-f41a9e68e7a1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 14:45:52,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada0ff56-d2b0-4096-932e-f41a9e68e7a1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:45:52,059 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:45:52,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:45:52,059 INFO L85 PathProgramCache]: Analyzing trace with hash 1596821500, now seen corresponding path program 1 times [2022-12-14 14:45:52,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:45:52,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280718553] [2022-12-14 14:45:52,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:45:52,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:45:52,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:45:52,195 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 12 proven. 27 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-14 14:45:52,195 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:45:52,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280718553] [2022-12-14 14:45:52,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280718553] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:45:52,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992321933] [2022-12-14 14:45:52,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:45:52,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:45:52,196 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada0ff56-d2b0-4096-932e-f41a9e68e7a1/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:45:52,197 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada0ff56-d2b0-4096-932e-f41a9e68e7a1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:45:52,198 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada0ff56-d2b0-4096-932e-f41a9e68e7a1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 14:45:52,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:45:52,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 550 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 14:45:52,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:45:52,373 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-14 14:45:52,373 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 14:45:52,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [992321933] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:45:52,374 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 14:45:52,374 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [6] total 7 [2022-12-14 14:45:52,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735404784] [2022-12-14 14:45:52,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:45:52,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 14:45:52,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:45:52,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 14:45:52,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 14:45:52,375 INFO L87 Difference]: Start difference. First operand 659 states and 908 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 2 states have internal predecessors, (69), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-12-14 14:45:52,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:45:52,542 INFO L93 Difference]: Finished difference Result 1940 states and 2705 transitions. [2022-12-14 14:45:52,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 14:45:52,542 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 2 states have internal predecessors, (69), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 109 [2022-12-14 14:45:52,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:45:52,546 INFO L225 Difference]: With dead ends: 1940 [2022-12-14 14:45:52,546 INFO L226 Difference]: Without dead ends: 1287 [2022-12-14 14:45:52,548 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 14:45:52,548 INFO L413 NwaCegarLoop]: 111 mSDtfsCounter, 60 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 14:45:52,548 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 201 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 14:45:52,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1287 states. [2022-12-14 14:45:52,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1287 to 1273. [2022-12-14 14:45:52,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1273 states, 972 states have (on average 1.3786008230452675) internal successors, (1340), 981 states have internal predecessors, (1340), 196 states have call successors, (196), 104 states have call predecessors, (196), 104 states have return successors, (196), 188 states have call predecessors, (196), 196 states have call successors, (196) [2022-12-14 14:45:52,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1273 states to 1273 states and 1732 transitions. [2022-12-14 14:45:52,643 INFO L78 Accepts]: Start accepts. Automaton has 1273 states and 1732 transitions. Word has length 109 [2022-12-14 14:45:52,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:45:52,643 INFO L495 AbstractCegarLoop]: Abstraction has 1273 states and 1732 transitions. [2022-12-14 14:45:52,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 2 states have internal predecessors, (69), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-12-14 14:45:52,644 INFO L276 IsEmpty]: Start isEmpty. Operand 1273 states and 1732 transitions. [2022-12-14 14:45:52,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-12-14 14:45:52,647 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:45:52,648 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:45:52,654 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada0ff56-d2b0-4096-932e-f41a9e68e7a1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 14:45:52,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada0ff56-d2b0-4096-932e-f41a9e68e7a1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:45:52,849 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:45:52,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:45:52,849 INFO L85 PathProgramCache]: Analyzing trace with hash -949337535, now seen corresponding path program 1 times [2022-12-14 14:45:52,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:45:52,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698922430] [2022-12-14 14:45:52,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:45:52,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:45:52,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:45:52,901 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-14 14:45:52,901 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:45:52,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698922430] [2022-12-14 14:45:52,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698922430] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:45:52,901 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:45:52,901 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 14:45:52,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819269064] [2022-12-14 14:45:52,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:45:52,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 14:45:52,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:45:52,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 14:45:52,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 14:45:52,903 INFO L87 Difference]: Start difference. First operand 1273 states and 1732 transitions. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 14:45:53,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:45:53,087 INFO L93 Difference]: Finished difference Result 3170 states and 4341 transitions. [2022-12-14 14:45:53,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 14:45:53,087 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 96 [2022-12-14 14:45:53,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:45:53,095 INFO L225 Difference]: With dead ends: 3170 [2022-12-14 14:45:53,096 INFO L226 Difference]: Without dead ends: 1903 [2022-12-14 14:45:53,099 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 14:45:53,100 INFO L413 NwaCegarLoop]: 135 mSDtfsCounter, 92 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 14:45:53,100 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 225 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 14:45:53,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1903 states. [2022-12-14 14:45:53,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1903 to 1889. [2022-12-14 14:45:53,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1889 states, 1444 states have (on average 1.3628808864265929) internal successors, (1968), 1457 states have internal predecessors, (1968), 288 states have call successors, (288), 156 states have call predecessors, (288), 156 states have return successors, (288), 276 states have call predecessors, (288), 288 states have call successors, (288) [2022-12-14 14:45:53,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1889 states to 1889 states and 2544 transitions. [2022-12-14 14:45:53,293 INFO L78 Accepts]: Start accepts. Automaton has 1889 states and 2544 transitions. Word has length 96 [2022-12-14 14:45:53,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:45:53,293 INFO L495 AbstractCegarLoop]: Abstraction has 1889 states and 2544 transitions. [2022-12-14 14:45:53,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 14:45:53,293 INFO L276 IsEmpty]: Start isEmpty. Operand 1889 states and 2544 transitions. [2022-12-14 14:45:53,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-12-14 14:45:53,297 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:45:53,297 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:45:53,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-12-14 14:45:53,297 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:45:53,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:45:53,298 INFO L85 PathProgramCache]: Analyzing trace with hash 1853774277, now seen corresponding path program 1 times [2022-12-14 14:45:53,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:45:53,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68112179] [2022-12-14 14:45:53,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:45:53,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:45:53,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:45:53,359 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 22 proven. 1 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-12-14 14:45:53,359 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:45:53,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68112179] [2022-12-14 14:45:53,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68112179] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:45:53,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314237628] [2022-12-14 14:45:53,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:45:53,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:45:53,360 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada0ff56-d2b0-4096-932e-f41a9e68e7a1/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:45:53,360 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada0ff56-d2b0-4096-932e-f41a9e68e7a1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:45:53,361 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada0ff56-d2b0-4096-932e-f41a9e68e7a1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 14:45:53,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:45:53,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 550 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 14:45:53,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:45:53,483 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-12-14 14:45:53,483 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 14:45:53,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1314237628] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:45:53,483 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 14:45:53,483 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-12-14 14:45:53,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782806747] [2022-12-14 14:45:53,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:45:53,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 14:45:53,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:45:53,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 14:45:53,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 14:45:53,484 INFO L87 Difference]: Start difference. First operand 1889 states and 2544 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 14:45:53,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:45:53,656 INFO L93 Difference]: Finished difference Result 3557 states and 4846 transitions. [2022-12-14 14:45:53,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 14:45:53,656 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 109 [2022-12-14 14:45:53,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:45:53,663 INFO L225 Difference]: With dead ends: 3557 [2022-12-14 14:45:53,663 INFO L226 Difference]: Without dead ends: 2291 [2022-12-14 14:45:53,666 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 14:45:53,666 INFO L413 NwaCegarLoop]: 149 mSDtfsCounter, 53 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 14:45:53,666 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 254 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 14:45:53,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2291 states. [2022-12-14 14:45:53,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2291 to 2101. [2022-12-14 14:45:53,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2101 states, 1632 states have (on average 1.3897058823529411) internal successors, (2268), 1645 states have internal predecessors, (2268), 300 states have call successors, (300), 168 states have call predecessors, (300), 168 states have return successors, (300), 288 states have call predecessors, (300), 300 states have call successors, (300) [2022-12-14 14:45:53,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2101 states to 2101 states and 2868 transitions. [2022-12-14 14:45:53,822 INFO L78 Accepts]: Start accepts. Automaton has 2101 states and 2868 transitions. Word has length 109 [2022-12-14 14:45:53,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:45:53,823 INFO L495 AbstractCegarLoop]: Abstraction has 2101 states and 2868 transitions. [2022-12-14 14:45:53,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 14:45:53,823 INFO L276 IsEmpty]: Start isEmpty. Operand 2101 states and 2868 transitions. [2022-12-14 14:45:53,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-12-14 14:45:53,831 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:45:53,831 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:45:53,836 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada0ff56-d2b0-4096-932e-f41a9e68e7a1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 14:45:54,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada0ff56-d2b0-4096-932e-f41a9e68e7a1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-14 14:45:54,032 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:45:54,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:45:54,033 INFO L85 PathProgramCache]: Analyzing trace with hash -112223797, now seen corresponding path program 2 times [2022-12-14 14:45:54,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:45:54,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423212454] [2022-12-14 14:45:54,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:45:54,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:45:54,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:45:54,236 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 15 proven. 27 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-14 14:45:54,236 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:45:54,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423212454] [2022-12-14 14:45:54,237 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423212454] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:45:54,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871031874] [2022-12-14 14:45:54,237 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 14:45:54,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:45:54,237 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada0ff56-d2b0-4096-932e-f41a9e68e7a1/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:45:54,238 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada0ff56-d2b0-4096-932e-f41a9e68e7a1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:45:54,239 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada0ff56-d2b0-4096-932e-f41a9e68e7a1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 14:45:54,315 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-14 14:45:54,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 14:45:54,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 14:45:54,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:45:54,332 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-14 14:45:54,333 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 14:45:54,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [871031874] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:45:54,333 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 14:45:54,333 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 14:45:54,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591256405] [2022-12-14 14:45:54,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:45:54,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 14:45:54,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:45:54,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 14:45:54,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 14:45:54,335 INFO L87 Difference]: Start difference. First operand 2101 states and 2868 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 14:45:54,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:45:54,528 INFO L93 Difference]: Finished difference Result 3589 states and 5010 transitions. [2022-12-14 14:45:54,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 14:45:54,529 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 109 [2022-12-14 14:45:54,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:45:54,534 INFO L225 Difference]: With dead ends: 3589 [2022-12-14 14:45:54,534 INFO L226 Difference]: Without dead ends: 2111 [2022-12-14 14:45:54,537 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 14:45:54,538 INFO L413 NwaCegarLoop]: 162 mSDtfsCounter, 102 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 14:45:54,538 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 254 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 14:45:54,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2111 states. [2022-12-14 14:45:54,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2111 to 2093. [2022-12-14 14:45:54,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2093 states, 1624 states have (on average 1.3669950738916257) internal successors, (2220), 1637 states have internal predecessors, (2220), 300 states have call successors, (300), 168 states have call predecessors, (300), 168 states have return successors, (300), 288 states have call predecessors, (300), 300 states have call successors, (300) [2022-12-14 14:45:54,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2093 states to 2093 states and 2820 transitions. [2022-12-14 14:45:54,668 INFO L78 Accepts]: Start accepts. Automaton has 2093 states and 2820 transitions. Word has length 109 [2022-12-14 14:45:54,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:45:54,668 INFO L495 AbstractCegarLoop]: Abstraction has 2093 states and 2820 transitions. [2022-12-14 14:45:54,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 14:45:54,668 INFO L276 IsEmpty]: Start isEmpty. Operand 2093 states and 2820 transitions. [2022-12-14 14:45:54,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-12-14 14:45:54,672 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:45:54,672 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:45:54,678 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada0ff56-d2b0-4096-932e-f41a9e68e7a1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 14:45:54,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada0ff56-d2b0-4096-932e-f41a9e68e7a1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-14 14:45:54,873 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:45:54,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:45:54,873 INFO L85 PathProgramCache]: Analyzing trace with hash 897783437, now seen corresponding path program 1 times [2022-12-14 14:45:54,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:45:54,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618002529] [2022-12-14 14:45:54,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:45:54,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:45:54,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:45:54,993 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 15 proven. 25 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-14 14:45:54,993 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:45:54,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618002529] [2022-12-14 14:45:54,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618002529] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:45:54,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363105062] [2022-12-14 14:45:54,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:45:54,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:45:54,994 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada0ff56-d2b0-4096-932e-f41a9e68e7a1/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:45:54,994 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada0ff56-d2b0-4096-932e-f41a9e68e7a1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:45:54,995 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada0ff56-d2b0-4096-932e-f41a9e68e7a1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 14:45:55,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:45:55,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 556 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 14:45:55,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:45:55,108 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-12-14 14:45:55,108 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 14:45:55,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363105062] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:45:55,109 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 14:45:55,109 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 14:45:55,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040248270] [2022-12-14 14:45:55,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:45:55,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 14:45:55,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:45:55,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 14:45:55,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 14:45:55,110 INFO L87 Difference]: Start difference. First operand 2093 states and 2820 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 14:45:55,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:45:55,356 INFO L93 Difference]: Finished difference Result 3939 states and 5283 transitions. [2022-12-14 14:45:55,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 14:45:55,356 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 109 [2022-12-14 14:45:55,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:45:55,363 INFO L225 Difference]: With dead ends: 3939 [2022-12-14 14:45:55,364 INFO L226 Difference]: Without dead ends: 2541 [2022-12-14 14:45:55,366 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 14:45:55,367 INFO L413 NwaCegarLoop]: 112 mSDtfsCounter, 102 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 14:45:55,367 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 136 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 14:45:55,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2541 states. [2022-12-14 14:45:55,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2541 to 2541. [2022-12-14 14:45:55,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2541 states, 2008 states have (on average 1.3266932270916334) internal successors, (2664), 2021 states have internal predecessors, (2664), 320 states have call successors, (320), 212 states have call predecessors, (320), 212 states have return successors, (320), 308 states have call predecessors, (320), 320 states have call successors, (320) [2022-12-14 14:45:55,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2541 states to 2541 states and 3304 transitions. [2022-12-14 14:45:55,543 INFO L78 Accepts]: Start accepts. Automaton has 2541 states and 3304 transitions. Word has length 109 [2022-12-14 14:45:55,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:45:55,543 INFO L495 AbstractCegarLoop]: Abstraction has 2541 states and 3304 transitions. [2022-12-14 14:45:55,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 14:45:55,543 INFO L276 IsEmpty]: Start isEmpty. Operand 2541 states and 3304 transitions. [2022-12-14 14:45:55,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-12-14 14:45:55,546 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:45:55,547 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:45:55,551 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada0ff56-d2b0-4096-932e-f41a9e68e7a1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 14:45:55,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada0ff56-d2b0-4096-932e-f41a9e68e7a1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:45:55,747 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:45:55,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:45:55,748 INFO L85 PathProgramCache]: Analyzing trace with hash 373035726, now seen corresponding path program 1 times [2022-12-14 14:45:55,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:45:55,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112079957] [2022-12-14 14:45:55,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:45:55,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:45:55,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:45:55,859 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-14 14:45:55,859 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:45:55,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112079957] [2022-12-14 14:45:55,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112079957] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:45:55,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497030553] [2022-12-14 14:45:55,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:45:55,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:45:55,860 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada0ff56-d2b0-4096-932e-f41a9e68e7a1/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:45:55,861 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada0ff56-d2b0-4096-932e-f41a9e68e7a1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:45:55,862 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada0ff56-d2b0-4096-932e-f41a9e68e7a1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 14:45:55,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:45:55,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 555 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 14:45:55,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:45:55,981 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-14 14:45:55,982 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 14:45:55,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [497030553] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:45:55,982 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 14:45:55,982 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 14:45:55,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178022314] [2022-12-14 14:45:55,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:45:55,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 14:45:55,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:45:55,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 14:45:55,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 14:45:55,983 INFO L87 Difference]: Start difference. First operand 2541 states and 3304 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 14:45:56,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:45:56,275 INFO L93 Difference]: Finished difference Result 6043 states and 7965 transitions. [2022-12-14 14:45:56,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 14:45:56,276 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 110 [2022-12-14 14:45:56,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:45:56,289 INFO L225 Difference]: With dead ends: 6043 [2022-12-14 14:45:56,289 INFO L226 Difference]: Without dead ends: 3509 [2022-12-14 14:45:56,295 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 14:45:56,296 INFO L413 NwaCegarLoop]: 121 mSDtfsCounter, 49 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 14:45:56,296 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 216 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 14:45:56,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3509 states. [2022-12-14 14:45:56,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3509 to 2837. [2022-12-14 14:45:56,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2837 states, 2268 states have (on average 1.3509700176366843) internal successors, (3064), 2282 states have internal predecessors, (3064), 338 states have call successors, (338), 230 states have call predecessors, (338), 230 states have return successors, (338), 325 states have call predecessors, (338), 338 states have call successors, (338) [2022-12-14 14:45:56,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2837 states to 2837 states and 3740 transitions. [2022-12-14 14:45:56,527 INFO L78 Accepts]: Start accepts. Automaton has 2837 states and 3740 transitions. Word has length 110 [2022-12-14 14:45:56,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:45:56,527 INFO L495 AbstractCegarLoop]: Abstraction has 2837 states and 3740 transitions. [2022-12-14 14:45:56,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 14:45:56,528 INFO L276 IsEmpty]: Start isEmpty. Operand 2837 states and 3740 transitions. [2022-12-14 14:45:56,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-12-14 14:45:56,536 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:45:56,536 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:45:56,541 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada0ff56-d2b0-4096-932e-f41a9e68e7a1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-14 14:45:56,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada0ff56-d2b0-4096-932e-f41a9e68e7a1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:45:56,737 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:45:56,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:45:56,737 INFO L85 PathProgramCache]: Analyzing trace with hash 598790266, now seen corresponding path program 1 times [2022-12-14 14:45:56,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:45:56,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121675526] [2022-12-14 14:45:56,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:45:56,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:45:56,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:45:56,820 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 20 proven. 4 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-12-14 14:45:56,820 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:45:56,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121675526] [2022-12-14 14:45:56,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121675526] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:45:56,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558601488] [2022-12-14 14:45:56,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:45:56,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:45:56,821 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada0ff56-d2b0-4096-932e-f41a9e68e7a1/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:45:56,822 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada0ff56-d2b0-4096-932e-f41a9e68e7a1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:45:56,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada0ff56-d2b0-4096-932e-f41a9e68e7a1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 14:45:56,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:45:56,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 564 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 14:45:56,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:45:56,951 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-12-14 14:45:56,951 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 14:45:56,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [558601488] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:45:56,951 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 14:45:56,951 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-12-14 14:45:56,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40965045] [2022-12-14 14:45:56,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:45:56,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 14:45:56,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:45:56,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 14:45:56,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 14:45:56,953 INFO L87 Difference]: Start difference. First operand 2837 states and 3740 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 14:45:57,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:45:57,250 INFO L93 Difference]: Finished difference Result 5347 states and 7128 transitions. [2022-12-14 14:45:57,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 14:45:57,251 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 111 [2022-12-14 14:45:57,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:45:57,259 INFO L225 Difference]: With dead ends: 5347 [2022-12-14 14:45:57,259 INFO L226 Difference]: Without dead ends: 3889 [2022-12-14 14:45:57,262 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 14:45:57,262 INFO L413 NwaCegarLoop]: 166 mSDtfsCounter, 63 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 14:45:57,262 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 270 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 14:45:57,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3889 states. [2022-12-14 14:45:57,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3889 to 3317. [2022-12-14 14:45:57,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3317 states, 2684 states have (on average 1.3710879284649777) internal successors, (3680), 2698 states have internal predecessors, (3680), 370 states have call successors, (370), 262 states have call predecessors, (370), 262 states have return successors, (370), 357 states have call predecessors, (370), 370 states have call successors, (370) [2022-12-14 14:45:57,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3317 states to 3317 states and 4420 transitions. [2022-12-14 14:45:57,485 INFO L78 Accepts]: Start accepts. Automaton has 3317 states and 4420 transitions. Word has length 111 [2022-12-14 14:45:57,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:45:57,485 INFO L495 AbstractCegarLoop]: Abstraction has 3317 states and 4420 transitions. [2022-12-14 14:45:57,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 14:45:57,485 INFO L276 IsEmpty]: Start isEmpty. Operand 3317 states and 4420 transitions. [2022-12-14 14:45:57,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-12-14 14:45:57,489 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:45:57,489 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:45:57,494 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada0ff56-d2b0-4096-932e-f41a9e68e7a1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-14 14:45:57,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada0ff56-d2b0-4096-932e-f41a9e68e7a1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:45:57,690 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:45:57,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:45:57,691 INFO L85 PathProgramCache]: Analyzing trace with hash -1331070077, now seen corresponding path program 1 times [2022-12-14 14:45:57,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:45:57,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866825030] [2022-12-14 14:45:57,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:45:57,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:45:57,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:45:57,815 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 21 proven. 3 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-12-14 14:45:57,815 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:45:57,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866825030] [2022-12-14 14:45:57,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866825030] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:45:57,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837130336] [2022-12-14 14:45:57,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:45:57,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:45:57,816 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada0ff56-d2b0-4096-932e-f41a9e68e7a1/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:45:57,817 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada0ff56-d2b0-4096-932e-f41a9e68e7a1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:45:57,818 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada0ff56-d2b0-4096-932e-f41a9e68e7a1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-14 14:45:57,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:45:57,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 567 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 14:45:57,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:45:57,939 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-12-14 14:45:57,939 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 14:45:57,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1837130336] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:45:57,939 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 14:45:57,939 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-12-14 14:45:57,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143575176] [2022-12-14 14:45:57,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:45:57,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 14:45:57,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:45:57,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 14:45:57,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 14:45:57,941 INFO L87 Difference]: Start difference. First operand 3317 states and 4420 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 14:45:58,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:45:58,312 INFO L93 Difference]: Finished difference Result 6175 states and 8300 transitions. [2022-12-14 14:45:58,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 14:45:58,313 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 111 [2022-12-14 14:45:58,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:45:58,324 INFO L225 Difference]: With dead ends: 6175 [2022-12-14 14:45:58,324 INFO L226 Difference]: Without dead ends: 4469 [2022-12-14 14:45:58,327 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 14:45:58,327 INFO L413 NwaCegarLoop]: 161 mSDtfsCounter, 57 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 14:45:58,328 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 265 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 14:45:58,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4469 states. [2022-12-14 14:45:58,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4469 to 3981. [2022-12-14 14:45:58,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3981 states, 3252 states have (on average 1.3813038130381303) internal successors, (4492), 3266 states have internal predecessors, (4492), 418 states have call successors, (418), 310 states have call predecessors, (418), 310 states have return successors, (418), 405 states have call predecessors, (418), 418 states have call successors, (418) [2022-12-14 14:45:58,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3981 states to 3981 states and 5328 transitions. [2022-12-14 14:45:58,594 INFO L78 Accepts]: Start accepts. Automaton has 3981 states and 5328 transitions. Word has length 111 [2022-12-14 14:45:58,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:45:58,594 INFO L495 AbstractCegarLoop]: Abstraction has 3981 states and 5328 transitions. [2022-12-14 14:45:58,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 14:45:58,594 INFO L276 IsEmpty]: Start isEmpty. Operand 3981 states and 5328 transitions. [2022-12-14 14:45:58,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-12-14 14:45:58,598 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:45:58,598 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:45:58,603 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada0ff56-d2b0-4096-932e-f41a9e68e7a1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-14 14:45:58,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada0ff56-d2b0-4096-932e-f41a9e68e7a1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-12-14 14:45:58,799 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:45:58,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:45:58,799 INFO L85 PathProgramCache]: Analyzing trace with hash -1784693063, now seen corresponding path program 1 times [2022-12-14 14:45:58,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:45:58,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692848026] [2022-12-14 14:45:58,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:45:58,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:45:58,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:45:58,900 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 17 proven. 26 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-14 14:45:58,900 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:45:58,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692848026] [2022-12-14 14:45:58,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692848026] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:45:58,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440160528] [2022-12-14 14:45:58,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:45:58,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:45:58,901 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada0ff56-d2b0-4096-932e-f41a9e68e7a1/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:45:58,901 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada0ff56-d2b0-4096-932e-f41a9e68e7a1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:45:58,902 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada0ff56-d2b0-4096-932e-f41a9e68e7a1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-14 14:45:58,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:45:59,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 562 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 14:45:59,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:45:59,045 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-12-14 14:45:59,046 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 14:45:59,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [440160528] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:45:59,046 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 14:45:59,046 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 7 [2022-12-14 14:45:59,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303005812] [2022-12-14 14:45:59,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:45:59,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 14:45:59,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:45:59,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 14:45:59,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-12-14 14:45:59,048 INFO L87 Difference]: Start difference. First operand 3981 states and 5328 transitions. Second operand has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 14:45:59,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:45:59,645 INFO L93 Difference]: Finished difference Result 9433 states and 12570 transitions. [2022-12-14 14:45:59,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 14:45:59,645 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 111 [2022-12-14 14:45:59,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:45:59,655 INFO L225 Difference]: With dead ends: 9433 [2022-12-14 14:45:59,655 INFO L226 Difference]: Without dead ends: 5459 [2022-12-14 14:45:59,658 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-12-14 14:45:59,659 INFO L413 NwaCegarLoop]: 111 mSDtfsCounter, 321 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 333 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 14:45:59,659 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [333 Valid, 230 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 14:45:59,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5459 states. [2022-12-14 14:46:00,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5459 to 5457. [2022-12-14 14:46:00,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5457 states, 4426 states have (on average 1.3492995933122458) internal successors, (5972), 4446 states have internal predecessors, (5972), 592 states have call successors, (592), 438 states have call predecessors, (592), 438 states have return successors, (592), 573 states have call predecessors, (592), 592 states have call successors, (592) [2022-12-14 14:46:00,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5457 states to 5457 states and 7156 transitions. [2022-12-14 14:46:00,074 INFO L78 Accepts]: Start accepts. Automaton has 5457 states and 7156 transitions. Word has length 111 [2022-12-14 14:46:00,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:46:00,074 INFO L495 AbstractCegarLoop]: Abstraction has 5457 states and 7156 transitions. [2022-12-14 14:46:00,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 14:46:00,075 INFO L276 IsEmpty]: Start isEmpty. Operand 5457 states and 7156 transitions. [2022-12-14 14:46:00,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-12-14 14:46:00,080 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:46:00,080 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:46:00,085 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada0ff56-d2b0-4096-932e-f41a9e68e7a1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-12-14 14:46:00,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada0ff56-d2b0-4096-932e-f41a9e68e7a1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:46:00,282 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:46:00,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:46:00,283 INFO L85 PathProgramCache]: Analyzing trace with hash -303981361, now seen corresponding path program 1 times [2022-12-14 14:46:00,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:46:00,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884750831] [2022-12-14 14:46:00,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:46:00,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:46:00,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:46:00,415 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 19 proven. 25 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-12-14 14:46:00,415 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:46:00,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884750831] [2022-12-14 14:46:00,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884750831] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:46:00,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462948507] [2022-12-14 14:46:00,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:46:00,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:46:00,416 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada0ff56-d2b0-4096-932e-f41a9e68e7a1/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:46:00,417 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada0ff56-d2b0-4096-932e-f41a9e68e7a1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:46:00,418 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada0ff56-d2b0-4096-932e-f41a9e68e7a1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-14 14:46:00,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:46:00,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 577 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 14:46:00,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:46:00,568 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-12-14 14:46:00,568 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 14:46:00,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462948507] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:46:00,569 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 14:46:00,569 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 7 [2022-12-14 14:46:00,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98039752] [2022-12-14 14:46:00,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:46:00,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 14:46:00,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:46:00,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 14:46:00,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-12-14 14:46:00,570 INFO L87 Difference]: Start difference. First operand 5457 states and 7156 transitions. Second operand has 6 states, 5 states have (on average 14.4) internal successors, (72), 6 states have internal predecessors, (72), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 14:46:01,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:46:01,229 INFO L93 Difference]: Finished difference Result 12969 states and 16941 transitions. [2022-12-14 14:46:01,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 14:46:01,230 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 14.4) internal successors, (72), 6 states have internal predecessors, (72), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 112 [2022-12-14 14:46:01,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:46:01,243 INFO L225 Difference]: With dead ends: 12969 [2022-12-14 14:46:01,243 INFO L226 Difference]: Without dead ends: 7519 [2022-12-14 14:46:01,249 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-12-14 14:46:01,249 INFO L413 NwaCegarLoop]: 103 mSDtfsCounter, 276 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 14:46:01,249 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [288 Valid, 258 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 14:46:01,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7519 states. [2022-12-14 14:46:01,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7519 to 7517. [2022-12-14 14:46:01,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7517 states, 6056 states have (on average 1.3188573315719947) internal successors, (7987), 6085 states have internal predecessors, (7987), 840 states have call successors, (840), 620 states have call predecessors, (840), 620 states have return successors, (840), 812 states have call predecessors, (840), 840 states have call successors, (840) [2022-12-14 14:46:01,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7517 states to 7517 states and 9667 transitions. [2022-12-14 14:46:01,865 INFO L78 Accepts]: Start accepts. Automaton has 7517 states and 9667 transitions. Word has length 112 [2022-12-14 14:46:01,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:46:01,865 INFO L495 AbstractCegarLoop]: Abstraction has 7517 states and 9667 transitions. [2022-12-14 14:46:01,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 14.4) internal successors, (72), 6 states have internal predecessors, (72), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 14:46:01,865 INFO L276 IsEmpty]: Start isEmpty. Operand 7517 states and 9667 transitions. [2022-12-14 14:46:01,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-12-14 14:46:01,871 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:46:01,871 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:46:01,876 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada0ff56-d2b0-4096-932e-f41a9e68e7a1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-14 14:46:02,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada0ff56-d2b0-4096-932e-f41a9e68e7a1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-12-14 14:46:02,072 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:46:02,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:46:02,072 INFO L85 PathProgramCache]: Analyzing trace with hash 1599897196, now seen corresponding path program 1 times [2022-12-14 14:46:02,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:46:02,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505478797] [2022-12-14 14:46:02,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:46:02,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:46:02,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:46:02,104 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 29 proven. 5 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-12-14 14:46:02,104 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:46:02,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505478797] [2022-12-14 14:46:02,104 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505478797] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:46:02,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873628036] [2022-12-14 14:46:02,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:46:02,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:46:02,105 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada0ff56-d2b0-4096-932e-f41a9e68e7a1/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:46:02,105 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada0ff56-d2b0-4096-932e-f41a9e68e7a1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:46:02,106 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada0ff56-d2b0-4096-932e-f41a9e68e7a1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-14 14:46:02,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:46:02,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 590 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 14:46:02,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:46:02,219 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 69 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-14 14:46:02,219 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 14:46:02,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1873628036] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:46:02,219 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 14:46:02,219 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2022-12-14 14:46:02,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026118860] [2022-12-14 14:46:02,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:46:02,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 14:46:02,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:46:02,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 14:46:02,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 14:46:02,221 INFO L87 Difference]: Start difference. First operand 7517 states and 9667 transitions. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 14:46:02,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:46:02,875 INFO L93 Difference]: Finished difference Result 12823 states and 16761 transitions. [2022-12-14 14:46:02,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 14:46:02,876 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 116 [2022-12-14 14:46:02,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:46:02,888 INFO L225 Difference]: With dead ends: 12823 [2022-12-14 14:46:02,888 INFO L226 Difference]: Without dead ends: 7537 [2022-12-14 14:46:02,895 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 14:46:02,896 INFO L413 NwaCegarLoop]: 179 mSDtfsCounter, 86 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 14:46:02,896 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 270 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 14:46:02,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7537 states. [2022-12-14 14:46:03,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7537 to 7425. [2022-12-14 14:46:03,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7425 states, 5964 states have (on average 1.290241448692153) internal successors, (7695), 5993 states have internal predecessors, (7695), 840 states have call successors, (840), 620 states have call predecessors, (840), 620 states have return successors, (840), 812 states have call predecessors, (840), 840 states have call successors, (840) [2022-12-14 14:46:03,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7425 states to 7425 states and 9375 transitions. [2022-12-14 14:46:03,566 INFO L78 Accepts]: Start accepts. Automaton has 7425 states and 9375 transitions. Word has length 116 [2022-12-14 14:46:03,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:46:03,566 INFO L495 AbstractCegarLoop]: Abstraction has 7425 states and 9375 transitions. [2022-12-14 14:46:03,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 14:46:03,566 INFO L276 IsEmpty]: Start isEmpty. Operand 7425 states and 9375 transitions. [2022-12-14 14:46:03,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-12-14 14:46:03,576 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:46:03,576 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:46:03,580 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada0ff56-d2b0-4096-932e-f41a9e68e7a1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-12-14 14:46:03,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada0ff56-d2b0-4096-932e-f41a9e68e7a1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:46:03,776 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:46:03,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:46:03,777 INFO L85 PathProgramCache]: Analyzing trace with hash -494271314, now seen corresponding path program 1 times [2022-12-14 14:46:03,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:46:03,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873919120] [2022-12-14 14:46:03,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:46:03,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:46:03,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:46:03,882 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 20 proven. 30 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-12-14 14:46:03,882 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:46:03,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873919120] [2022-12-14 14:46:03,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873919120] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:46:03,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615615912] [2022-12-14 14:46:03,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:46:03,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:46:03,883 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada0ff56-d2b0-4096-932e-f41a9e68e7a1/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:46:03,884 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada0ff56-d2b0-4096-932e-f41a9e68e7a1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:46:03,884 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada0ff56-d2b0-4096-932e-f41a9e68e7a1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-14 14:46:03,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:46:03,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 596 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 14:46:03,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:46:04,012 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-12-14 14:46:04,012 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 14:46:04,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1615615912] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:46:04,012 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 14:46:04,012 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 7 [2022-12-14 14:46:04,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197302744] [2022-12-14 14:46:04,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:46:04,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 14:46:04,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:46:04,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 14:46:04,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-12-14 14:46:04,014 INFO L87 Difference]: Start difference. First operand 7425 states and 9375 transitions. Second operand has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2022-12-14 14:46:04,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:46:04,737 INFO L93 Difference]: Finished difference Result 10548 states and 13317 transitions. [2022-12-14 14:46:04,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 14:46:04,737 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) Word has length 116 [2022-12-14 14:46:04,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:46:04,755 INFO L225 Difference]: With dead ends: 10548 [2022-12-14 14:46:04,755 INFO L226 Difference]: Without dead ends: 7895 [2022-12-14 14:46:04,762 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-12-14 14:46:04,762 INFO L413 NwaCegarLoop]: 165 mSDtfsCounter, 106 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 412 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 14:46:04,763 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 412 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 14:46:04,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7895 states. [2022-12-14 14:46:05,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7895 to 7667. [2022-12-14 14:46:05,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7667 states, 6159 states have (on average 1.287221951615522) internal successors, (7928), 6206 states have internal predecessors, (7928), 847 states have call successors, (847), 624 states have call predecessors, (847), 660 states have return successors, (883), 837 states have call predecessors, (883), 847 states have call successors, (883) [2022-12-14 14:46:05,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7667 states to 7667 states and 9658 transitions. [2022-12-14 14:46:05,352 INFO L78 Accepts]: Start accepts. Automaton has 7667 states and 9658 transitions. Word has length 116 [2022-12-14 14:46:05,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:46:05,353 INFO L495 AbstractCegarLoop]: Abstraction has 7667 states and 9658 transitions. [2022-12-14 14:46:05,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2022-12-14 14:46:05,353 INFO L276 IsEmpty]: Start isEmpty. Operand 7667 states and 9658 transitions. [2022-12-14 14:46:05,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-12-14 14:46:05,359 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:46:05,359 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:46:05,363 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada0ff56-d2b0-4096-932e-f41a9e68e7a1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-12-14 14:46:05,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada0ff56-d2b0-4096-932e-f41a9e68e7a1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:46:05,560 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:46:05,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:46:05,560 INFO L85 PathProgramCache]: Analyzing trace with hash -761170429, now seen corresponding path program 1 times [2022-12-14 14:46:05,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:46:05,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233976454] [2022-12-14 14:46:05,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:46:05,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:46:05,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:46:05,597 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 28 proven. 11 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-12-14 14:46:05,597 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:46:05,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233976454] [2022-12-14 14:46:05,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233976454] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:46:05,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573389513] [2022-12-14 14:46:05,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:46:05,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:46:05,598 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada0ff56-d2b0-4096-932e-f41a9e68e7a1/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:46:05,599 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada0ff56-d2b0-4096-932e-f41a9e68e7a1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:46:05,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada0ff56-d2b0-4096-932e-f41a9e68e7a1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-14 14:46:05,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:46:05,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 595 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 14:46:05,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:46:05,705 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-12-14 14:46:05,706 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 14:46:05,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573389513] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:46:05,706 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 14:46:05,706 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2022-12-14 14:46:05,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131006838] [2022-12-14 14:46:05,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:46:05,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 14:46:05,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:46:05,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 14:46:05,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 14:46:05,707 INFO L87 Difference]: Start difference. First operand 7667 states and 9658 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 14:46:06,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:46:06,392 INFO L93 Difference]: Finished difference Result 10386 states and 13163 transitions. [2022-12-14 14:46:06,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 14:46:06,392 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 117 [2022-12-14 14:46:06,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:46:06,404 INFO L225 Difference]: With dead ends: 10386 [2022-12-14 14:46:06,405 INFO L226 Difference]: Without dead ends: 7409 [2022-12-14 14:46:06,409 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 14:46:06,409 INFO L413 NwaCegarLoop]: 114 mSDtfsCounter, 22 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 14:46:06,409 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 211 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 14:46:06,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7409 states. [2022-12-14 14:46:06,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7409 to 6998. [2022-12-14 14:46:06,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6998 states, 5598 states have (on average 1.2934976777420508) internal successors, (7241), 5618 states have internal predecessors, (7241), 811 states have call successors, (811), 588 states have call predecessors, (811), 588 states have return successors, (811), 792 states have call predecessors, (811), 811 states have call successors, (811) [2022-12-14 14:46:06,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6998 states to 6998 states and 8863 transitions. [2022-12-14 14:46:06,944 INFO L78 Accepts]: Start accepts. Automaton has 6998 states and 8863 transitions. Word has length 117 [2022-12-14 14:46:06,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:46:06,944 INFO L495 AbstractCegarLoop]: Abstraction has 6998 states and 8863 transitions. [2022-12-14 14:46:06,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 14:46:06,944 INFO L276 IsEmpty]: Start isEmpty. Operand 6998 states and 8863 transitions. [2022-12-14 14:46:06,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-12-14 14:46:06,950 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:46:06,950 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:46:06,955 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada0ff56-d2b0-4096-932e-f41a9e68e7a1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-12-14 14:46:07,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada0ff56-d2b0-4096-932e-f41a9e68e7a1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-12-14 14:46:07,152 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:46:07,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:46:07,153 INFO L85 PathProgramCache]: Analyzing trace with hash 975547296, now seen corresponding path program 1 times [2022-12-14 14:46:07,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:46:07,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562321788] [2022-12-14 14:46:07,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:46:07,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:46:07,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:46:07,263 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 31 proven. 11 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-12-14 14:46:07,263 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:46:07,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562321788] [2022-12-14 14:46:07,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562321788] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:46:07,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304930058] [2022-12-14 14:46:07,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:46:07,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:46:07,264 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada0ff56-d2b0-4096-932e-f41a9e68e7a1/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:46:07,265 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada0ff56-d2b0-4096-932e-f41a9e68e7a1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:46:07,265 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada0ff56-d2b0-4096-932e-f41a9e68e7a1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-14 14:46:07,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:46:07,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 600 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 14:46:07,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:46:07,405 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 14:46:07,405 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 14:46:07,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1304930058] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:46:07,405 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 14:46:07,405 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 6 [2022-12-14 14:46:07,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618309031] [2022-12-14 14:46:07,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:46:07,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 14:46:07,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:46:07,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 14:46:07,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 14:46:07,407 INFO L87 Difference]: Start difference. First operand 6998 states and 8863 transitions. Second operand has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 14:46:08,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:46:08,118 INFO L93 Difference]: Finished difference Result 12823 states and 16309 transitions. [2022-12-14 14:46:08,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 14:46:08,119 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 117 [2022-12-14 14:46:08,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:46:08,131 INFO L225 Difference]: With dead ends: 12823 [2022-12-14 14:46:08,131 INFO L226 Difference]: Without dead ends: 7989 [2022-12-14 14:46:08,138 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 14:46:08,138 INFO L413 NwaCegarLoop]: 121 mSDtfsCounter, 77 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 14:46:08,139 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 152 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 14:46:08,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7989 states. [2022-12-14 14:46:08,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7989 to 7897. [2022-12-14 14:46:08,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7897 states, 6422 states have (on average 1.2675179071940206) internal successors, (8140), 6442 states have internal predecessors, (8140), 821 states have call successors, (821), 653 states have call predecessors, (821), 653 states have return successors, (877), 802 states have call predecessors, (877), 821 states have call successors, (877) [2022-12-14 14:46:08,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7897 states to 7897 states and 9838 transitions. [2022-12-14 14:46:08,762 INFO L78 Accepts]: Start accepts. Automaton has 7897 states and 9838 transitions. Word has length 117 [2022-12-14 14:46:08,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:46:08,762 INFO L495 AbstractCegarLoop]: Abstraction has 7897 states and 9838 transitions. [2022-12-14 14:46:08,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 14:46:08,762 INFO L276 IsEmpty]: Start isEmpty. Operand 7897 states and 9838 transitions. [2022-12-14 14:46:08,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-12-14 14:46:08,769 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:46:08,769 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:46:08,773 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada0ff56-d2b0-4096-932e-f41a9e68e7a1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-12-14 14:46:08,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada0ff56-d2b0-4096-932e-f41a9e68e7a1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-12-14 14:46:08,970 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:46:08,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:46:08,971 INFO L85 PathProgramCache]: Analyzing trace with hash -415858239, now seen corresponding path program 1 times [2022-12-14 14:46:08,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:46:08,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035835916] [2022-12-14 14:46:08,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:46:08,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:46:08,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:46:09,300 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 26 proven. 7 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-12-14 14:46:09,300 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:46:09,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035835916] [2022-12-14 14:46:09,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035835916] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:46:09,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625226743] [2022-12-14 14:46:09,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:46:09,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:46:09,301 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada0ff56-d2b0-4096-932e-f41a9e68e7a1/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:46:09,301 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada0ff56-d2b0-4096-932e-f41a9e68e7a1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:46:09,302 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada0ff56-d2b0-4096-932e-f41a9e68e7a1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-12-14 14:46:09,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:46:09,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 591 conjuncts, 27 conjunts are in the unsatisfiable core [2022-12-14 14:46:09,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:46:09,602 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 43 proven. 15 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-14 14:46:09,602 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 14:46:09,807 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-12-14 14:46:09,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [625226743] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-14 14:46:09,807 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-14 14:46:09,807 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [11, 8] total 20 [2022-12-14 14:46:09,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581445928] [2022-12-14 14:46:09,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:46:09,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 14:46:09,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:46:09,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 14:46:09,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2022-12-14 14:46:09,808 INFO L87 Difference]: Start difference. First operand 7897 states and 9838 transitions. Second operand has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 3 states have call successors, (9), 1 states have call predecessors, (9), 3 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 14:46:10,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:46:10,720 INFO L93 Difference]: Finished difference Result 12841 states and 16027 transitions. [2022-12-14 14:46:10,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 14:46:10,720 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 3 states have call successors, (9), 1 states have call predecessors, (9), 3 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) Word has length 114 [2022-12-14 14:46:10,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:46:10,732 INFO L225 Difference]: With dead ends: 12841 [2022-12-14 14:46:10,732 INFO L226 Difference]: Without dead ends: 8853 [2022-12-14 14:46:10,737 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 220 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2022-12-14 14:46:10,737 INFO L413 NwaCegarLoop]: 141 mSDtfsCounter, 102 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 14:46:10,737 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 271 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 14:46:10,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8853 states. [2022-12-14 14:46:11,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8853 to 8640. [2022-12-14 14:46:11,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8640 states, 7117 states have (on average 1.2485597864268652) internal successors, (8886), 7137 states have internal predecessors, (8886), 827 states have call successors, (827), 695 states have call predecessors, (827), 695 states have return successors, (879), 808 states have call predecessors, (879), 827 states have call successors, (879) [2022-12-14 14:46:11,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8640 states to 8640 states and 10592 transitions. [2022-12-14 14:46:11,433 INFO L78 Accepts]: Start accepts. Automaton has 8640 states and 10592 transitions. Word has length 114 [2022-12-14 14:46:11,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:46:11,434 INFO L495 AbstractCegarLoop]: Abstraction has 8640 states and 10592 transitions. [2022-12-14 14:46:11,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 3 states have call successors, (9), 1 states have call predecessors, (9), 3 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) [2022-12-14 14:46:11,434 INFO L276 IsEmpty]: Start isEmpty. Operand 8640 states and 10592 transitions. [2022-12-14 14:46:11,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-12-14 14:46:11,440 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:46:11,440 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:46:11,444 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada0ff56-d2b0-4096-932e-f41a9e68e7a1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-12-14 14:46:11,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada0ff56-d2b0-4096-932e-f41a9e68e7a1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:46:11,641 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:46:11,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:46:11,642 INFO L85 PathProgramCache]: Analyzing trace with hash 1454197215, now seen corresponding path program 1 times [2022-12-14 14:46:11,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:46:11,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034130691] [2022-12-14 14:46:11,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:46:11,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:46:11,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:46:11,889 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 26 proven. 7 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-12-14 14:46:11,889 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:46:11,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034130691] [2022-12-14 14:46:11,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034130691] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:46:11,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133973968] [2022-12-14 14:46:11,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:46:11,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:46:11,889 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada0ff56-d2b0-4096-932e-f41a9e68e7a1/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:46:11,890 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada0ff56-d2b0-4096-932e-f41a9e68e7a1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:46:11,891 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada0ff56-d2b0-4096-932e-f41a9e68e7a1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-12-14 14:46:11,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:46:11,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 590 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-14 14:46:11,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:46:12,036 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-12-14 14:46:12,037 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 14:46:12,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [133973968] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:46:12,037 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 14:46:12,037 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [11] total 15 [2022-12-14 14:46:12,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942841928] [2022-12-14 14:46:12,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:46:12,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 14:46:12,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:46:12,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 14:46:12,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2022-12-14 14:46:12,038 INFO L87 Difference]: Start difference. First operand 8640 states and 10592 transitions. Second operand has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 4 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-12-14 14:46:13,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:46:13,321 INFO L93 Difference]: Finished difference Result 16266 states and 19972 transitions. [2022-12-14 14:46:13,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 14:46:13,322 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 4 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 115 [2022-12-14 14:46:13,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:46:13,336 INFO L225 Difference]: With dead ends: 16266 [2022-12-14 14:46:13,336 INFO L226 Difference]: Without dead ends: 11850 [2022-12-14 14:46:13,341 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 118 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2022-12-14 14:46:13,342 INFO L413 NwaCegarLoop]: 155 mSDtfsCounter, 226 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 14:46:13,342 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [241 Valid, 323 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 14:46:13,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11850 states. [2022-12-14 14:46:14,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11850 to 11370. [2022-12-14 14:46:14,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11370 states, 9269 states have (on average 1.2363793289459488) internal successors, (11460), 9325 states have internal predecessors, (11460), 1143 states have call successors, (1143), 948 states have call predecessors, (1143), 957 states have return successors, (1275), 1097 states have call predecessors, (1275), 1143 states have call successors, (1275) [2022-12-14 14:46:14,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11370 states to 11370 states and 13878 transitions. [2022-12-14 14:46:14,510 INFO L78 Accepts]: Start accepts. Automaton has 11370 states and 13878 transitions. Word has length 115 [2022-12-14 14:46:14,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:46:14,510 INFO L495 AbstractCegarLoop]: Abstraction has 11370 states and 13878 transitions. [2022-12-14 14:46:14,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 4 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-12-14 14:46:14,510 INFO L276 IsEmpty]: Start isEmpty. Operand 11370 states and 13878 transitions. [2022-12-14 14:46:14,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-12-14 14:46:14,516 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:46:14,517 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:46:14,521 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada0ff56-d2b0-4096-932e-f41a9e68e7a1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-12-14 14:46:14,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada0ff56-d2b0-4096-932e-f41a9e68e7a1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-12-14 14:46:14,718 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:46:14,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:46:14,719 INFO L85 PathProgramCache]: Analyzing trace with hash 1562478345, now seen corresponding path program 1 times [2022-12-14 14:46:14,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:46:14,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17937707] [2022-12-14 14:46:14,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:46:14,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:46:14,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:46:14,998 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 13 proven. 43 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-12-14 14:46:14,998 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:46:14,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17937707] [2022-12-14 14:46:14,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17937707] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:46:14,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573456013] [2022-12-14 14:46:14,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:46:14,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:46:14,999 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada0ff56-d2b0-4096-932e-f41a9e68e7a1/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:46:15,000 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada0ff56-d2b0-4096-932e-f41a9e68e7a1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:46:15,001 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada0ff56-d2b0-4096-932e-f41a9e68e7a1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-12-14 14:46:15,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:46:15,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 644 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-14 14:46:15,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:46:15,179 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 62 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 14:46:15,179 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 14:46:15,368 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 17 proven. 3 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2022-12-14 14:46:15,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573456013] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 14:46:15,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1048151478] [2022-12-14 14:46:15,371 INFO L159 IcfgInterpreter]: Started Sifa with 68 locations of interest [2022-12-14 14:46:15,371 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 14:46:15,372 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 14:46:15,372 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 14:46:15,372 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 14:46:24,935 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events2 with input of size 188 for LOIs [2022-12-14 14:46:43,739 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread2 with input of size 131 for LOIs [2022-12-14 14:46:43,765 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels2 with input of size 196 for LOIs [2022-12-14 14:46:43,817 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify with input of size 78 for LOIs [2022-12-14 14:46:44,069 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads2 with input of size 108 for LOIs [2022-12-14 14:46:44,681 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events2 with input of size 228 for LOIs [2022-12-14 14:46:54,730 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 14:47:10,430 WARN L233 SmtUtils]: Spent 14.22s on a formula simplification. DAG size of input: 508 DAG size of output: 457 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 14:47:28,963 WARN L233 SmtUtils]: Spent 12.52s on a formula simplification. DAG size of input: 608 DAG size of output: 391 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 14:47:37,151 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '330926#(and (= ~p_dw_pc~0 0) (= ~c_dr_st~0 0) (= ~p_num_write~0 0) (= ~c_num_read~0 0) (= ~q_buf_0~0 0) (= ~t1_pc~0 0) (= ~t1_i~0 1) (= ~p_last_write~0 0) (<= 0 (+ |ULTIMATE.start_eval2_~tmp_ndt_1~0#1| 2147483648)) (= ~c_last_read~0 0) (= 0 ~c_dr_i~0) (= ~q_free~0 0) (= 0 ~t3_pc~0) (<= |ULTIMATE.start_eval2_~tmp_ndt_1~0#1| 2147483647) (<= 0 |ULTIMATE.start_eval2_~tmp~4#1|) (= ~m_pc~0 1) (= ~p_dw_i~0 0) (= ~m_i~0 1) (= |ULTIMATE.start_start_simulation2_~kernel_st~1#1| 1) (not (= ~token~0 (+ 3 ~local~0))) (= ~p_dw_st~0 0) (= ~t2_i~0 1) (<= |ULTIMATE.start_eval2_~tmp~4#1| 1) (= ~q_write_ev~0 0) (= ~c_dr_pc~0 0) (not (= |ULTIMATE.start_eval2_~tmp~4#1| 0)) (= 0 ~t2_pc~0) (= ~q_read_ev~0 0) (= ~m_st~0 1) (= |#NULL.offset| 0) (= ~a_t~0 0) (= ~t3_i~0 1) (<= 0 |#StackHeapBarrier|) (not (= |ULTIMATE.start_eval2_~tmp_ndt_1~0#1| 0)) (= |#NULL.base| 0))' at error location [2022-12-14 14:47:37,151 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 14:47:37,152 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 14:47:37,152 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8, 6] total 21 [2022-12-14 14:47:37,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041026329] [2022-12-14 14:47:37,152 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 14:47:37,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-14 14:47:37,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:47:37,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-14 14:47:37,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=464, Invalid=4506, Unknown=0, NotChecked=0, Total=4970 [2022-12-14 14:47:37,154 INFO L87 Difference]: Start difference. First operand 11370 states and 13878 transitions. Second operand has 21 states, 17 states have (on average 9.0) internal successors, (153), 19 states have internal predecessors, (153), 9 states have call successors, (33), 5 states have call predecessors, (33), 8 states have return successors, (34), 9 states have call predecessors, (34), 9 states have call successors, (34) [2022-12-14 14:47:40,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:47:40,063 INFO L93 Difference]: Finished difference Result 22526 states and 28067 transitions. [2022-12-14 14:47:40,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-12-14 14:47:40,063 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 17 states have (on average 9.0) internal successors, (153), 19 states have internal predecessors, (153), 9 states have call successors, (33), 5 states have call predecessors, (33), 8 states have return successors, (34), 9 states have call predecessors, (34), 9 states have call successors, (34) Word has length 120 [2022-12-14 14:47:40,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:47:40,079 INFO L225 Difference]: With dead ends: 22526 [2022-12-14 14:47:40,080 INFO L226 Difference]: Without dead ends: 11131 [2022-12-14 14:47:40,095 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 482 GetRequests, 329 SyntacticMatches, 16 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8779 ImplicationChecksByTransitivity, 43.2s TimeCoverageRelationStatistics Valid=1349, Invalid=17833, Unknown=0, NotChecked=0, Total=19182 [2022-12-14 14:47:40,095 INFO L413 NwaCegarLoop]: 229 mSDtfsCounter, 1712 mSDsluCounter, 1827 mSDsCounter, 0 mSdLazyCounter, 1746 mSolverCounterSat, 501 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1723 SdHoareTripleChecker+Valid, 2056 SdHoareTripleChecker+Invalid, 2247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 501 IncrementalHoareTripleChecker+Valid, 1746 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-12-14 14:47:40,095 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1723 Valid, 2056 Invalid, 2247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [501 Valid, 1746 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-12-14 14:47:40,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11131 states. [2022-12-14 14:47:40,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11131 to 8039. [2022-12-14 14:47:40,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8039 states, 6624 states have (on average 1.2480374396135265) internal successors, (8267), 6647 states have internal predecessors, (8267), 746 states have call successors, (746), 665 states have call predecessors, (746), 668 states have return successors, (794), 726 states have call predecessors, (794), 746 states have call successors, (794) [2022-12-14 14:47:40,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8039 states to 8039 states and 9807 transitions. [2022-12-14 14:47:40,871 INFO L78 Accepts]: Start accepts. Automaton has 8039 states and 9807 transitions. Word has length 120 [2022-12-14 14:47:40,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:47:40,871 INFO L495 AbstractCegarLoop]: Abstraction has 8039 states and 9807 transitions. [2022-12-14 14:47:40,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 17 states have (on average 9.0) internal successors, (153), 19 states have internal predecessors, (153), 9 states have call successors, (33), 5 states have call predecessors, (33), 8 states have return successors, (34), 9 states have call predecessors, (34), 9 states have call successors, (34) [2022-12-14 14:47:40,871 INFO L276 IsEmpty]: Start isEmpty. Operand 8039 states and 9807 transitions. [2022-12-14 14:47:40,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-12-14 14:47:40,875 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:47:40,875 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-12-14 14:47:40,879 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada0ff56-d2b0-4096-932e-f41a9e68e7a1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-12-14 14:47:41,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada0ff56-d2b0-4096-932e-f41a9e68e7a1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:47:41,076 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:47:41,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:47:41,077 INFO L85 PathProgramCache]: Analyzing trace with hash -941627789, now seen corresponding path program 1 times [2022-12-14 14:47:41,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:47:41,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203402302] [2022-12-14 14:47:41,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:47:41,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:47:41,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:47:41,227 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 41 proven. 17 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-12-14 14:47:41,227 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:47:41,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203402302] [2022-12-14 14:47:41,227 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203402302] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:47:41,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125589306] [2022-12-14 14:47:41,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:47:41,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:47:41,228 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada0ff56-d2b0-4096-932e-f41a9e68e7a1/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:47:41,228 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada0ff56-d2b0-4096-932e-f41a9e68e7a1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:47:41,229 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada0ff56-d2b0-4096-932e-f41a9e68e7a1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-12-14 14:47:41,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:47:41,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 589 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-14 14:47:41,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:47:41,373 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 77 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 14:47:41,374 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 14:47:41,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125589306] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:47:41,374 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 14:47:41,374 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 6 [2022-12-14 14:47:41,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4045335] [2022-12-14 14:47:41,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:47:41,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 14:47:41,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:47:41,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 14:47:41,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 14:47:41,375 INFO L87 Difference]: Start difference. First operand 8039 states and 9807 transitions. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 5 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2022-12-14 14:47:42,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:47:42,505 INFO L93 Difference]: Finished difference Result 15225 states and 18627 transitions. [2022-12-14 14:47:42,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 14:47:42,506 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 5 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) Word has length 116 [2022-12-14 14:47:42,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:47:42,517 INFO L225 Difference]: With dead ends: 15225 [2022-12-14 14:47:42,517 INFO L226 Difference]: Without dead ends: 9946 [2022-12-14 14:47:42,521 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-12-14 14:47:42,521 INFO L413 NwaCegarLoop]: 161 mSDtfsCounter, 196 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 14:47:42,521 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 353 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 14:47:42,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9946 states. [2022-12-14 14:47:43,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9946 to 8945. [2022-12-14 14:47:43,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8945 states, 7321 states have (on average 1.2349405818877202) internal successors, (9041), 7358 states have internal predecessors, (9041), 860 states have call successors, (860), 752 states have call predecessors, (860), 763 states have return successors, (964), 834 states have call predecessors, (964), 860 states have call successors, (964) [2022-12-14 14:47:43,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8945 states to 8945 states and 10865 transitions. [2022-12-14 14:47:43,389 INFO L78 Accepts]: Start accepts. Automaton has 8945 states and 10865 transitions. Word has length 116 [2022-12-14 14:47:43,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:47:43,389 INFO L495 AbstractCegarLoop]: Abstraction has 8945 states and 10865 transitions. [2022-12-14 14:47:43,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 5 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2022-12-14 14:47:43,389 INFO L276 IsEmpty]: Start isEmpty. Operand 8945 states and 10865 transitions. [2022-12-14 14:47:43,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-12-14 14:47:43,393 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:47:43,393 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:47:43,398 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada0ff56-d2b0-4096-932e-f41a9e68e7a1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-12-14 14:47:43,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada0ff56-d2b0-4096-932e-f41a9e68e7a1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:47:43,594 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:47:43,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:47:43,595 INFO L85 PathProgramCache]: Analyzing trace with hash 938513806, now seen corresponding path program 1 times [2022-12-14 14:47:43,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:47:43,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531724245] [2022-12-14 14:47:43,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:47:43,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:47:43,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:47:43,736 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 17 proven. 26 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-12-14 14:47:43,736 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:47:43,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531724245] [2022-12-14 14:47:43,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531724245] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:47:43,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206832543] [2022-12-14 14:47:43,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:47:43,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:47:43,737 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada0ff56-d2b0-4096-932e-f41a9e68e7a1/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:47:43,738 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada0ff56-d2b0-4096-932e-f41a9e68e7a1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:47:43,739 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada0ff56-d2b0-4096-932e-f41a9e68e7a1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-12-14 14:47:43,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:47:43,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 653 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-14 14:47:43,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:47:43,925 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 62 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 14:47:43,925 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 14:47:44,093 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 17 proven. 3 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2022-12-14 14:47:44,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [206832543] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 14:47:44,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1339832348] [2022-12-14 14:47:44,095 INFO L159 IcfgInterpreter]: Started Sifa with 71 locations of interest [2022-12-14 14:47:44,095 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 14:47:44,095 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 14:47:44,095 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 14:47:44,095 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 14:47:49,999 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events2 with input of size 187 for LOIs [2022-12-14 14:48:02,466 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread2 with input of size 128 for LOIs [2022-12-14 14:48:02,491 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels2 with input of size 195 for LOIs [2022-12-14 14:48:02,540 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify with input of size 78 for LOIs [2022-12-14 14:48:02,615 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads2 with input of size 105 for LOIs [2022-12-14 14:48:02,842 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events2 with input of size 227 for LOIs [2022-12-14 14:48:15,017 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 14:48:27,920 WARN L233 SmtUtils]: Spent 11.45s on a formula simplification. DAG size of input: 460 DAG size of output: 408 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 14:48:40,900 WARN L233 SmtUtils]: Spent 9.80s on a formula simplification. DAG size of input: 503 DAG size of output: 322 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 14:48:52,732 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '407112#(and (= ~p_dw_pc~0 0) (= ~c_dr_st~0 0) (= ~p_num_write~0 0) (= ~c_num_read~0 0) (= ~q_buf_0~0 0) (= ~t1_i~0 1) (= ~p_last_write~0 0) (<= 0 (+ |ULTIMATE.start_eval2_~tmp_ndt_1~0#1| 2147483648)) (= ~c_last_read~0 0) (= 0 ~c_dr_i~0) (= ~q_free~0 0) (= 0 ~t3_pc~0) (<= |ULTIMATE.start_eval2_~tmp_ndt_1~0#1| 2147483647) (<= 0 |ULTIMATE.start_eval2_~tmp~4#1|) (= ~m_pc~0 1) (= ~p_dw_i~0 0) (= ~m_i~0 1) (= |ULTIMATE.start_start_simulation2_~kernel_st~1#1| 1) (not (= ~token~0 (+ 3 ~local~0))) (= ~p_dw_st~0 0) (= ~t2_i~0 1) (<= |ULTIMATE.start_eval2_~tmp~4#1| 1) (= ~q_write_ev~0 0) (= ~c_dr_pc~0 0) (not (= |ULTIMATE.start_eval2_~tmp~4#1| 0)) (= 0 ~t2_pc~0) (= ~q_read_ev~0 0) (= ~m_st~0 1) (= |#NULL.offset| 0) (= ~a_t~0 0) (= ~t3_i~0 1) (<= 0 |#StackHeapBarrier|) (<= 0 ~t1_pc~0) (not (= |ULTIMATE.start_eval2_~tmp_ndt_1~0#1| 0)) (= |#NULL.base| 0))' at error location [2022-12-14 14:48:52,732 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 14:48:52,732 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 14:48:52,732 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 6] total 17 [2022-12-14 14:48:52,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620890279] [2022-12-14 14:48:52,732 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 14:48:52,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-14 14:48:52,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:48:52,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-14 14:48:52,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=477, Invalid=4635, Unknown=0, NotChecked=0, Total=5112 [2022-12-14 14:48:52,734 INFO L87 Difference]: Start difference. First operand 8945 states and 10865 transitions. Second operand has 17 states, 14 states have (on average 9.642857142857142) internal successors, (135), 15 states have internal predecessors, (135), 7 states have call successors, (30), 4 states have call predecessors, (30), 7 states have return successors, (30), 6 states have call predecessors, (30), 7 states have call successors, (30) [2022-12-14 14:48:56,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:48:56,479 INFO L93 Difference]: Finished difference Result 17522 states and 21706 transitions. [2022-12-14 14:48:56,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2022-12-14 14:48:56,480 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 14 states have (on average 9.642857142857142) internal successors, (135), 15 states have internal predecessors, (135), 7 states have call successors, (30), 4 states have call predecessors, (30), 7 states have return successors, (30), 6 states have call predecessors, (30), 7 states have call successors, (30) Word has length 123 [2022-12-14 14:48:56,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:48:56,493 INFO L225 Difference]: With dead ends: 17522 [2022-12-14 14:48:56,493 INFO L226 Difference]: Without dead ends: 9469 [2022-12-14 14:48:56,505 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 538 GetRequests, 353 SyntacticMatches, 12 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13745 ImplicationChecksByTransitivity, 39.0s TimeCoverageRelationStatistics Valid=2015, Invalid=28435, Unknown=0, NotChecked=0, Total=30450 [2022-12-14 14:48:56,505 INFO L413 NwaCegarLoop]: 409 mSDtfsCounter, 1657 mSDsluCounter, 3535 mSDsCounter, 0 mSdLazyCounter, 2424 mSolverCounterSat, 408 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1664 SdHoareTripleChecker+Valid, 3944 SdHoareTripleChecker+Invalid, 2832 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 408 IncrementalHoareTripleChecker+Valid, 2424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-12-14 14:48:56,506 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1664 Valid, 3944 Invalid, 2832 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [408 Valid, 2424 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-12-14 14:48:56,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9469 states. [2022-12-14 14:48:57,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9469 to 6401. [2022-12-14 14:48:57,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6401 states, 5303 states have (on average 1.2394870827833302) internal successors, (6573), 5318 states have internal predecessors, (6573), 564 states have call successors, (564), 528 states have call predecessors, (564), 533 states have return successors, (628), 554 states have call predecessors, (628), 564 states have call successors, (628) [2022-12-14 14:48:57,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6401 states to 6401 states and 7765 transitions. [2022-12-14 14:48:57,177 INFO L78 Accepts]: Start accepts. Automaton has 6401 states and 7765 transitions. Word has length 123 [2022-12-14 14:48:57,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:48:57,177 INFO L495 AbstractCegarLoop]: Abstraction has 6401 states and 7765 transitions. [2022-12-14 14:48:57,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 14 states have (on average 9.642857142857142) internal successors, (135), 15 states have internal predecessors, (135), 7 states have call successors, (30), 4 states have call predecessors, (30), 7 states have return successors, (30), 6 states have call predecessors, (30), 7 states have call successors, (30) [2022-12-14 14:48:57,177 INFO L276 IsEmpty]: Start isEmpty. Operand 6401 states and 7765 transitions. [2022-12-14 14:48:57,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-12-14 14:48:57,180 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:48:57,180 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:48:57,185 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada0ff56-d2b0-4096-932e-f41a9e68e7a1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-12-14 14:48:57,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada0ff56-d2b0-4096-932e-f41a9e68e7a1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-12-14 14:48:57,381 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:48:57,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:48:57,382 INFO L85 PathProgramCache]: Analyzing trace with hash 1318546110, now seen corresponding path program 1 times [2022-12-14 14:48:57,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:48:57,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607004200] [2022-12-14 14:48:57,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:48:57,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:48:57,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:48:57,506 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 17 proven. 25 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-12-14 14:48:57,506 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:48:57,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607004200] [2022-12-14 14:48:57,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607004200] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:48:57,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765131038] [2022-12-14 14:48:57,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:48:57,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:48:57,507 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada0ff56-d2b0-4096-932e-f41a9e68e7a1/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:48:57,508 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada0ff56-d2b0-4096-932e-f41a9e68e7a1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:48:57,508 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada0ff56-d2b0-4096-932e-f41a9e68e7a1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-12-14 14:48:57,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:48:57,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 663 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 14:48:57,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:48:57,746 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 60 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 14:48:57,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 14:48:57,958 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 17 proven. 3 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-12-14 14:48:57,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1765131038] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 14:48:57,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1461341661] [2022-12-14 14:48:57,961 INFO L159 IcfgInterpreter]: Started Sifa with 74 locations of interest [2022-12-14 14:48:57,961 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 14:48:57,961 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 14:48:57,962 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 14:48:57,962 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 14:49:05,882 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events2 with input of size 190 for LOIs [2022-12-14 14:49:08,092 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread2 with input of size 129 for LOIs [2022-12-14 14:49:08,117 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels2 with input of size 198 for LOIs [2022-12-14 14:49:08,169 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify with input of size 80 for LOIs [2022-12-14 14:49:08,255 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads2 with input of size 120 for LOIs [2022-12-14 14:49:08,630 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events2 with input of size 230 for LOIs [2022-12-14 14:49:16,238 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 14:49:26,063 WARN L233 SmtUtils]: Spent 8.41s on a formula simplification. DAG size of input: 384 DAG size of output: 331 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 14:49:44,366 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '440958#(and (= ~p_dw_pc~0 0) (= ~c_dr_st~0 0) (<= ~t1_pc~0 1) (= ~p_num_write~0 0) (= ~c_num_read~0 0) (= ~q_buf_0~0 0) (= ~t1_i~0 1) (= ~p_last_write~0 0) (<= 0 (+ |ULTIMATE.start_eval2_~tmp_ndt_1~0#1| 2147483648)) (<= 0 ~t2_pc~0) (= ~c_last_read~0 0) (= 0 ~c_dr_i~0) (= ~q_free~0 0) (= 0 ~t3_pc~0) (<= |ULTIMATE.start_eval2_~tmp_ndt_1~0#1| 2147483647) (<= 0 |ULTIMATE.start_eval2_~tmp~4#1|) (= ~m_pc~0 1) (<= ~t2_pc~0 1) (= ~p_dw_i~0 0) (= ~m_i~0 1) (= |ULTIMATE.start_start_simulation2_~kernel_st~1#1| 1) (not (= ~token~0 (+ 3 ~local~0))) (= ~p_dw_st~0 0) (= ~t2_i~0 1) (<= |ULTIMATE.start_eval2_~tmp~4#1| 1) (= ~q_write_ev~0 0) (= ~c_dr_pc~0 0) (not (= |ULTIMATE.start_eval2_~tmp~4#1| 0)) (= ~q_read_ev~0 0) (= ~m_st~0 1) (= |#NULL.offset| 0) (= ~a_t~0 0) (= ~t3_i~0 1) (<= 0 |#StackHeapBarrier|) (<= 0 ~t1_pc~0) (not (= |ULTIMATE.start_eval2_~tmp_ndt_1~0#1| 0)) (= |#NULL.base| 0))' at error location [2022-12-14 14:49:44,366 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 14:49:44,366 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 14:49:44,367 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 6] total 18 [2022-12-14 14:49:44,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854373988] [2022-12-14 14:49:44,367 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 14:49:44,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-14 14:49:44,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:49:44,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-14 14:49:44,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=479, Invalid=5221, Unknown=0, NotChecked=0, Total=5700 [2022-12-14 14:49:44,368 INFO L87 Difference]: Start difference. First operand 6401 states and 7765 transitions. Second operand has 18 states, 15 states have (on average 9.266666666666667) internal successors, (139), 16 states have internal predecessors, (139), 7 states have call successors, (30), 4 states have call predecessors, (30), 7 states have return successors, (30), 6 states have call predecessors, (30), 7 states have call successors, (30) [2022-12-14 14:49:47,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:49:47,688 INFO L93 Difference]: Finished difference Result 12195 states and 14869 transitions. [2022-12-14 14:49:47,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2022-12-14 14:49:47,689 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 15 states have (on average 9.266666666666667) internal successors, (139), 16 states have internal predecessors, (139), 7 states have call successors, (30), 4 states have call predecessors, (30), 7 states have return successors, (30), 6 states have call predecessors, (30), 7 states have call successors, (30) Word has length 125 [2022-12-14 14:49:47,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:49:47,697 INFO L225 Difference]: With dead ends: 12195 [2022-12-14 14:49:47,697 INFO L226 Difference]: Without dead ends: 6934 [2022-12-14 14:49:47,705 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 564 GetRequests, 358 SyntacticMatches, 13 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17244 ImplicationChecksByTransitivity, 29.6s TimeCoverageRelationStatistics Valid=2324, Invalid=35506, Unknown=0, NotChecked=0, Total=37830 [2022-12-14 14:49:47,706 INFO L413 NwaCegarLoop]: 332 mSDtfsCounter, 1423 mSDsluCounter, 2995 mSDsCounter, 0 mSdLazyCounter, 2271 mSolverCounterSat, 404 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1429 SdHoareTripleChecker+Valid, 3327 SdHoareTripleChecker+Invalid, 2675 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 404 IncrementalHoareTripleChecker+Valid, 2271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-12-14 14:49:47,706 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1429 Valid, 3327 Invalid, 2675 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [404 Valid, 2271 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-12-14 14:49:47,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6934 states. [2022-12-14 14:49:48,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6934 to 5166. [2022-12-14 14:49:48,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5166 states, 4286 states have (on average 1.225618292113859) internal successors, (5253), 4299 states have internal predecessors, (5253), 445 states have call successors, (445), 427 states have call predecessors, (445), 434 states have return successors, (503), 439 states have call predecessors, (503), 445 states have call successors, (503) [2022-12-14 14:49:48,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5166 states to 5166 states and 6201 transitions. [2022-12-14 14:49:48,258 INFO L78 Accepts]: Start accepts. Automaton has 5166 states and 6201 transitions. Word has length 125 [2022-12-14 14:49:48,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:49:48,258 INFO L495 AbstractCegarLoop]: Abstraction has 5166 states and 6201 transitions. [2022-12-14 14:49:48,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 15 states have (on average 9.266666666666667) internal successors, (139), 16 states have internal predecessors, (139), 7 states have call successors, (30), 4 states have call predecessors, (30), 7 states have return successors, (30), 6 states have call predecessors, (30), 7 states have call successors, (30) [2022-12-14 14:49:48,259 INFO L276 IsEmpty]: Start isEmpty. Operand 5166 states and 6201 transitions. [2022-12-14 14:49:48,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-12-14 14:49:48,261 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:49:48,261 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:49:48,265 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada0ff56-d2b0-4096-932e-f41a9e68e7a1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-12-14 14:49:48,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada0ff56-d2b0-4096-932e-f41a9e68e7a1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:49:48,462 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:49:48,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:49:48,463 INFO L85 PathProgramCache]: Analyzing trace with hash -523141132, now seen corresponding path program 1 times [2022-12-14 14:49:48,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:49:48,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307912728] [2022-12-14 14:49:48,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:49:48,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:49:48,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:49:48,817 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 23 proven. 31 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-14 14:49:48,817 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:49:48,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307912728] [2022-12-14 14:49:48,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307912728] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:49:48,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738615007] [2022-12-14 14:49:48,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:49:48,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:49:48,817 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada0ff56-d2b0-4096-932e-f41a9e68e7a1/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:49:48,818 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada0ff56-d2b0-4096-932e-f41a9e68e7a1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:49:48,819 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada0ff56-d2b0-4096-932e-f41a9e68e7a1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-12-14 14:49:48,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:49:48,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 673 conjuncts, 32 conjunts are in the unsatisfiable core [2022-12-14 14:49:48,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:49:49,124 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 56 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-12-14 14:49:49,124 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 14:49:49,537 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 27 proven. 7 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-12-14 14:49:49,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [738615007] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 14:49:49,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [416719361] [2022-12-14 14:49:49,540 INFO L159 IcfgInterpreter]: Started Sifa with 77 locations of interest [2022-12-14 14:49:49,540 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 14:49:49,540 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 14:49:49,540 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 14:49:49,540 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 14:49:56,613 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events2 with input of size 187 for LOIs [2022-12-14 14:50:10,520 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread2 with input of size 124 for LOIs [2022-12-14 14:50:10,543 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels2 with input of size 195 for LOIs [2022-12-14 14:50:10,592 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify with input of size 78 for LOIs [2022-12-14 14:50:10,670 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads2 with input of size 101 for LOIs [2022-12-14 14:50:11,052 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events2 with input of size 227 for LOIs [2022-12-14 14:50:12,688 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 14:50:40,872 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '465602#(and (= ~p_dw_pc~0 0) (= ~c_dr_st~0 0) (= ~p_num_write~0 0) (= ~c_num_read~0 0) (= ~q_buf_0~0 0) (= ~t1_i~0 1) (= ~p_last_write~0 0) (<= 0 (+ |ULTIMATE.start_eval2_~tmp_ndt_1~0#1| 2147483648)) (<= 0 ~t2_pc~0) (= ~c_last_read~0 0) (= 0 ~c_dr_i~0) (= ~q_free~0 0) (<= |ULTIMATE.start_eval2_~tmp_ndt_1~0#1| 2147483647) (<= 0 |ULTIMATE.start_eval2_~tmp~4#1|) (= ~m_pc~0 1) (= ~p_dw_i~0 0) (= ~m_i~0 1) (= |ULTIMATE.start_start_simulation2_~kernel_st~1#1| 1) (not (= ~token~0 (+ 3 ~local~0))) (= ~p_dw_st~0 0) (= ~t2_i~0 1) (<= |ULTIMATE.start_eval2_~tmp~4#1| 1) (= ~q_write_ev~0 0) (= ~c_dr_pc~0 0) (not (= |ULTIMATE.start_eval2_~tmp~4#1| 0)) (= ~q_read_ev~0 0) (= ~m_st~0 1) (= |#NULL.offset| 0) (= ~a_t~0 0) (<= 0 ~t3_pc~0) (= ~t3_i~0 1) (<= 0 |#StackHeapBarrier|) (<= 0 ~t1_pc~0) (not (= |ULTIMATE.start_eval2_~tmp_ndt_1~0#1| 0)) (= |#NULL.base| 0))' at error location [2022-12-14 14:50:40,872 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 14:50:40,872 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 14:50:40,872 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 9, 12] total 36 [2022-12-14 14:50:40,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435375839] [2022-12-14 14:50:40,872 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 14:50:40,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-12-14 14:50:40,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:50:40,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-12-14 14:50:40,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=711, Invalid=8991, Unknown=0, NotChecked=0, Total=9702 [2022-12-14 14:50:40,874 INFO L87 Difference]: Start difference. First operand 5166 states and 6201 transitions. Second operand has 36 states, 24 states have (on average 8.416666666666666) internal successors, (202), 27 states have internal predecessors, (202), 14 states have call successors, (40), 11 states have call predecessors, (40), 18 states have return successors, (40), 14 states have call predecessors, (40), 14 states have call successors, (40) [2022-12-14 14:50:46,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:50:46,001 INFO L93 Difference]: Finished difference Result 13148 states and 16091 transitions. [2022-12-14 14:50:46,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-12-14 14:50:46,001 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 24 states have (on average 8.416666666666666) internal successors, (202), 27 states have internal predecessors, (202), 14 states have call successors, (40), 11 states have call predecessors, (40), 18 states have return successors, (40), 14 states have call predecessors, (40), 14 states have call successors, (40) Word has length 127 [2022-12-14 14:50:46,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:50:46,012 INFO L225 Difference]: With dead ends: 13148 [2022-12-14 14:50:46,012 INFO L226 Difference]: Without dead ends: 8867 [2022-12-14 14:50:46,017 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 479 GetRequests, 310 SyntacticMatches, 12 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10396 ImplicationChecksByTransitivity, 30.5s TimeCoverageRelationStatistics Valid=2381, Invalid=22741, Unknown=0, NotChecked=0, Total=25122 [2022-12-14 14:50:46,018 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 3259 mSDsluCounter, 761 mSDsCounter, 0 mSdLazyCounter, 3173 mSolverCounterSat, 1622 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3259 SdHoareTripleChecker+Valid, 830 SdHoareTripleChecker+Invalid, 4795 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1622 IncrementalHoareTripleChecker+Valid, 3173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-12-14 14:50:46,018 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3259 Valid, 830 Invalid, 4795 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1622 Valid, 3173 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-12-14 14:50:46,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8867 states. [2022-12-14 14:50:46,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8867 to 4877. [2022-12-14 14:50:46,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4877 states, 4048 states have (on average 1.2235671936758894) internal successors, (4953), 4059 states have internal predecessors, (4953), 425 states have call successors, (425), 403 states have call predecessors, (425), 403 states have return successors, (425), 414 states have call predecessors, (425), 425 states have call successors, (425) [2022-12-14 14:50:46,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4877 states to 4877 states and 5803 transitions. [2022-12-14 14:50:46,691 INFO L78 Accepts]: Start accepts. Automaton has 4877 states and 5803 transitions. Word has length 127 [2022-12-14 14:50:46,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:50:46,691 INFO L495 AbstractCegarLoop]: Abstraction has 4877 states and 5803 transitions. [2022-12-14 14:50:46,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 24 states have (on average 8.416666666666666) internal successors, (202), 27 states have internal predecessors, (202), 14 states have call successors, (40), 11 states have call predecessors, (40), 18 states have return successors, (40), 14 states have call predecessors, (40), 14 states have call successors, (40) [2022-12-14 14:50:46,691 INFO L276 IsEmpty]: Start isEmpty. Operand 4877 states and 5803 transitions. [2022-12-14 14:50:46,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-12-14 14:50:46,693 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:50:46,693 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:50:46,698 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada0ff56-d2b0-4096-932e-f41a9e68e7a1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-12-14 14:50:46,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada0ff56-d2b0-4096-932e-f41a9e68e7a1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-12-14 14:50:46,894 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:50:46,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:50:46,895 INFO L85 PathProgramCache]: Analyzing trace with hash -612277787, now seen corresponding path program 1 times [2022-12-14 14:50:46,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:50:46,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343789470] [2022-12-14 14:50:46,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:50:46,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:50:46,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:50:46,996 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 31 proven. 19 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2022-12-14 14:50:46,996 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:50:46,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343789470] [2022-12-14 14:50:46,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343789470] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:50:46,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134841974] [2022-12-14 14:50:46,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:50:46,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:50:46,997 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada0ff56-d2b0-4096-932e-f41a9e68e7a1/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:50:46,997 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada0ff56-d2b0-4096-932e-f41a9e68e7a1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:50:46,998 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada0ff56-d2b0-4096-932e-f41a9e68e7a1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-12-14 14:50:47,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:50:47,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 702 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 14:50:47,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:50:47,104 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-12-14 14:50:47,104 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 14:50:47,104 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2134841974] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:50:47,104 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 14:50:47,104 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 6 [2022-12-14 14:50:47,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633577521] [2022-12-14 14:50:47,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:50:47,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 14:50:47,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:50:47,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 14:50:47,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 14:50:47,105 INFO L87 Difference]: Start difference. First operand 4877 states and 5803 transitions. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 14:50:47,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:50:47,787 INFO L93 Difference]: Finished difference Result 9461 states and 11355 transitions. [2022-12-14 14:50:47,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 14:50:47,788 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 141 [2022-12-14 14:50:47,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:50:47,794 INFO L225 Difference]: With dead ends: 9461 [2022-12-14 14:50:47,794 INFO L226 Difference]: Without dead ends: 5165 [2022-12-14 14:50:47,797 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 [2022-12-14 14:50:47,797 INFO L413 NwaCegarLoop]: 120 mSDtfsCounter, 78 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 14:50:47,797 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 149 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 14:50:47,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5165 states. [2022-12-14 14:50:48,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5165 to 4983. [2022-12-14 14:50:48,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4983 states, 4148 states have (on average 1.206364513018322) internal successors, (5004), 4159 states have internal predecessors, (5004), 425 states have call successors, (425), 409 states have call predecessors, (425), 409 states have return successors, (435), 414 states have call predecessors, (435), 425 states have call successors, (435) [2022-12-14 14:50:48,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4983 states to 4983 states and 5864 transitions. [2022-12-14 14:50:48,440 INFO L78 Accepts]: Start accepts. Automaton has 4983 states and 5864 transitions. Word has length 141 [2022-12-14 14:50:48,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:50:48,440 INFO L495 AbstractCegarLoop]: Abstraction has 4983 states and 5864 transitions. [2022-12-14 14:50:48,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 14:50:48,440 INFO L276 IsEmpty]: Start isEmpty. Operand 4983 states and 5864 transitions. [2022-12-14 14:50:48,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-12-14 14:50:48,442 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:50:48,442 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:50:48,447 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada0ff56-d2b0-4096-932e-f41a9e68e7a1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-12-14 14:50:48,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada0ff56-d2b0-4096-932e-f41a9e68e7a1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:50:48,644 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:50:48,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:50:48,645 INFO L85 PathProgramCache]: Analyzing trace with hash -690720190, now seen corresponding path program 1 times [2022-12-14 14:50:48,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:50:48,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732217342] [2022-12-14 14:50:48,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:50:48,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:50:48,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:50:48,683 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 35 proven. 17 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-12-14 14:50:48,684 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:50:48,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732217342] [2022-12-14 14:50:48,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732217342] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:50:48,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796509575] [2022-12-14 14:50:48,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:50:48,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:50:48,684 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada0ff56-d2b0-4096-932e-f41a9e68e7a1/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:50:48,685 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada0ff56-d2b0-4096-932e-f41a9e68e7a1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:50:48,686 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada0ff56-d2b0-4096-932e-f41a9e68e7a1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-12-14 14:50:48,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:50:48,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 693 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 14:50:48,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:50:48,783 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 92 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-12-14 14:50:48,783 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 14:50:48,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1796509575] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:50:48,783 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 14:50:48,784 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2022-12-14 14:50:48,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072558417] [2022-12-14 14:50:48,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:50:48,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 14:50:48,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:50:48,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 14:50:48,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 14:50:48,785 INFO L87 Difference]: Start difference. First operand 4983 states and 5864 transitions. Second operand has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-12-14 14:50:49,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:50:49,495 INFO L93 Difference]: Finished difference Result 9143 states and 10936 transitions. [2022-12-14 14:50:49,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 14:50:49,495 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 141 [2022-12-14 14:50:49,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:50:49,501 INFO L225 Difference]: With dead ends: 9143 [2022-12-14 14:50:49,501 INFO L226 Difference]: Without dead ends: 4738 [2022-12-14 14:50:49,505 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 14:50:49,506 INFO L413 NwaCegarLoop]: 152 mSDtfsCounter, 85 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 14:50:49,506 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 212 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 14:50:49,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4738 states. [2022-12-14 14:50:50,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4738 to 4662. [2022-12-14 14:50:50,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4662 states, 3865 states have (on average 1.1596377749029754) internal successors, (4482), 3876 states have internal predecessors, (4482), 406 states have call successors, (406), 390 states have call predecessors, (406), 390 states have return successors, (416), 395 states have call predecessors, (416), 406 states have call successors, (416) [2022-12-14 14:50:50,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4662 states to 4662 states and 5304 transitions. [2022-12-14 14:50:50,202 INFO L78 Accepts]: Start accepts. Automaton has 4662 states and 5304 transitions. Word has length 141 [2022-12-14 14:50:50,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:50:50,202 INFO L495 AbstractCegarLoop]: Abstraction has 4662 states and 5304 transitions. [2022-12-14 14:50:50,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-12-14 14:50:50,203 INFO L276 IsEmpty]: Start isEmpty. Operand 4662 states and 5304 transitions. [2022-12-14 14:50:50,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-12-14 14:50:50,204 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:50:50,204 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:50:50,209 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada0ff56-d2b0-4096-932e-f41a9e68e7a1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-12-14 14:50:50,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada0ff56-d2b0-4096-932e-f41a9e68e7a1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:50:50,406 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:50:50,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:50:50,407 INFO L85 PathProgramCache]: Analyzing trace with hash -923405645, now seen corresponding path program 1 times [2022-12-14 14:50:50,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:50:50,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077654517] [2022-12-14 14:50:50,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:50:50,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:50:50,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:50:50,524 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 43 proven. 36 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-12-14 14:50:50,524 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:50:50,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077654517] [2022-12-14 14:50:50,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077654517] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:50:50,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765669991] [2022-12-14 14:50:50,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:50:50,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:50:50,524 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada0ff56-d2b0-4096-932e-f41a9e68e7a1/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:50:50,525 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada0ff56-d2b0-4096-932e-f41a9e68e7a1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:50:50,526 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada0ff56-d2b0-4096-932e-f41a9e68e7a1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-12-14 14:50:50,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:50:50,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 699 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-14 14:50:50,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:50:50,695 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 111 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-14 14:50:50,696 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 14:50:50,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765669991] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:50:50,696 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 14:50:50,696 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 6 [2022-12-14 14:50:50,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126770380] [2022-12-14 14:50:50,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:50:50,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 14:50:50,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:50:50,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 14:50:50,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 14:50:50,697 INFO L87 Difference]: Start difference. First operand 4662 states and 5304 transitions. Second operand has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 5 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2022-12-14 14:50:51,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:50:51,819 INFO L93 Difference]: Finished difference Result 9570 states and 10934 transitions. [2022-12-14 14:50:51,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 14:50:51,820 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 5 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 144 [2022-12-14 14:50:51,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:50:51,826 INFO L225 Difference]: With dead ends: 9570 [2022-12-14 14:50:51,826 INFO L226 Difference]: Without dead ends: 5582 [2022-12-14 14:50:51,830 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-12-14 14:50:51,830 INFO L413 NwaCegarLoop]: 150 mSDtfsCounter, 210 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 14:50:51,830 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [225 Valid, 404 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 14:50:51,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5582 states. [2022-12-14 14:50:52,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5582 to 5131. [2022-12-14 14:50:52,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5131 states, 4208 states have (on average 1.1454372623574145) internal successors, (4820), 4226 states have internal predecessors, (4820), 472 states have call successors, (472), 440 states have call predecessors, (472), 450 states have return successors, (522), 464 states have call predecessors, (522), 472 states have call successors, (522) [2022-12-14 14:50:52,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5131 states to 5131 states and 5814 transitions. [2022-12-14 14:50:52,574 INFO L78 Accepts]: Start accepts. Automaton has 5131 states and 5814 transitions. Word has length 144 [2022-12-14 14:50:52,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:50:52,575 INFO L495 AbstractCegarLoop]: Abstraction has 5131 states and 5814 transitions. [2022-12-14 14:50:52,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 5 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2022-12-14 14:50:52,575 INFO L276 IsEmpty]: Start isEmpty. Operand 5131 states and 5814 transitions. [2022-12-14 14:50:52,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2022-12-14 14:50:52,577 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:50:52,577 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:50:52,582 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada0ff56-d2b0-4096-932e-f41a9e68e7a1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-12-14 14:50:52,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada0ff56-d2b0-4096-932e-f41a9e68e7a1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-12-14 14:50:52,778 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:50:52,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:50:52,779 INFO L85 PathProgramCache]: Analyzing trace with hash 1064788522, now seen corresponding path program 1 times [2022-12-14 14:50:52,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:50:52,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713315928] [2022-12-14 14:50:52,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:50:52,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:50:52,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:50:52,927 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2022-12-14 14:50:52,927 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:50:52,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713315928] [2022-12-14 14:50:52,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713315928] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:50:52,927 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 14:50:52,927 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 14:50:52,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024878450] [2022-12-14 14:50:52,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:50:52,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 14:50:52,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:50:52,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 14:50:52,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 14:50:52,929 INFO L87 Difference]: Start difference. First operand 5131 states and 5814 transitions. Second operand has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 5 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2022-12-14 14:50:55,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:50:55,452 INFO L93 Difference]: Finished difference Result 17331 states and 19777 transitions. [2022-12-14 14:50:55,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 14:50:55,453 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 5 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) Word has length 173 [2022-12-14 14:50:55,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:50:55,471 INFO L225 Difference]: With dead ends: 17331 [2022-12-14 14:50:55,471 INFO L226 Difference]: Without dead ends: 14764 [2022-12-14 14:50:55,475 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 14:50:55,476 INFO L413 NwaCegarLoop]: 348 mSDtfsCounter, 366 mSDsluCounter, 762 mSDsCounter, 0 mSdLazyCounter, 619 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 366 SdHoareTripleChecker+Valid, 1110 SdHoareTripleChecker+Invalid, 629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 619 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 14:50:55,476 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [366 Valid, 1110 Invalid, 629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 619 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 14:50:55,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14764 states. [2022-12-14 14:50:57,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14764 to 9100. [2022-12-14 14:50:57,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9100 states, 7413 states have (on average 1.1458249021988398) internal successors, (8494), 7441 states have internal predecessors, (8494), 873 states have call successors, (873), 794 states have call predecessors, (873), 813 states have return successors, (975), 864 states have call predecessors, (975), 873 states have call successors, (975) [2022-12-14 14:50:57,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9100 states to 9100 states and 10342 transitions. [2022-12-14 14:50:57,044 INFO L78 Accepts]: Start accepts. Automaton has 9100 states and 10342 transitions. Word has length 173 [2022-12-14 14:50:57,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:50:57,044 INFO L495 AbstractCegarLoop]: Abstraction has 9100 states and 10342 transitions. [2022-12-14 14:50:57,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 5 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2022-12-14 14:50:57,044 INFO L276 IsEmpty]: Start isEmpty. Operand 9100 states and 10342 transitions. [2022-12-14 14:50:57,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2022-12-14 14:50:57,048 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:50:57,049 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:50:57,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-12-14 14:50:57,049 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:50:57,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:50:57,049 INFO L85 PathProgramCache]: Analyzing trace with hash -1393336076, now seen corresponding path program 1 times [2022-12-14 14:50:57,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:50:57,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799098986] [2022-12-14 14:50:57,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:50:57,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:50:57,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:50:57,518 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 40 proven. 75 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2022-12-14 14:50:57,518 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:50:57,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799098986] [2022-12-14 14:50:57,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799098986] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:50:57,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484426522] [2022-12-14 14:50:57,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:50:57,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:50:57,519 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada0ff56-d2b0-4096-932e-f41a9e68e7a1/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:50:57,520 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada0ff56-d2b0-4096-932e-f41a9e68e7a1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:50:57,520 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada0ff56-d2b0-4096-932e-f41a9e68e7a1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-12-14 14:50:57,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:50:57,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 905 conjuncts, 27 conjunts are in the unsatisfiable core [2022-12-14 14:50:57,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:50:57,763 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 137 proven. 2 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2022-12-14 14:50:57,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 14:50:58,079 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 49 proven. 18 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2022-12-14 14:50:58,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1484426522] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 14:50:58,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1390792091] [2022-12-14 14:50:58,082 INFO L159 IcfgInterpreter]: Started Sifa with 83 locations of interest [2022-12-14 14:50:58,082 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 14:50:58,083 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 14:50:58,083 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 14:50:58,083 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 14:51:26,038 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events2 with input of size 187 for LOIs [2022-12-14 14:51:51,839 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread2 with input of size 107 for LOIs [2022-12-14 14:51:51,867 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels2 with input of size 195 for LOIs [2022-12-14 14:51:51,916 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify with input of size 106 for LOIs [2022-12-14 14:51:52,106 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads2 with input of size 101 for LOIs [2022-12-14 14:51:52,637 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events2 with input of size 227 for LOIs [2022-12-14 14:51:54,282 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 14:52:10,453 WARN L233 SmtUtils]: Spent 8.58s on a formula simplification. DAG size of input: 715 DAG size of output: 485 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 14:52:24,232 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '585644#(and (= ~p_dw_pc~0 0) (= ~c_dr_st~0 0) (= ~p_num_write~0 0) (= ~c_num_read~0 0) (= ~q_buf_0~0 0) (= ~t1_i~0 1) (= ~p_last_write~0 0) (<= 0 (+ |ULTIMATE.start_eval2_~tmp_ndt_1~0#1| 2147483648)) (<= 0 ~t2_pc~0) (= ~c_last_read~0 0) (= 0 ~c_dr_i~0) (= ~q_free~0 0) (<= |ULTIMATE.start_eval2_~tmp_ndt_1~0#1| 2147483647) (<= 0 |ULTIMATE.start_eval2_~tmp~4#1|) (= ~m_pc~0 1) (= ~p_dw_i~0 0) (= ~m_i~0 1) (= |ULTIMATE.start_start_simulation2_~kernel_st~1#1| 1) (not (= ~token~0 (+ 3 ~local~0))) (= ~p_dw_st~0 0) (= ~t2_i~0 1) (<= |ULTIMATE.start_eval2_~tmp~4#1| 1) (= ~q_write_ev~0 0) (= ~c_dr_pc~0 0) (not (= |ULTIMATE.start_eval2_~tmp~4#1| 0)) (= ~q_read_ev~0 0) (= ~m_st~0 1) (= |#NULL.offset| 0) (= ~a_t~0 0) (<= 0 ~t3_pc~0) (= ~t3_i~0 1) (<= 0 |#StackHeapBarrier|) (<= 0 ~t1_pc~0) (not (= |ULTIMATE.start_eval2_~tmp_ndt_1~0#1| 0)) (= |#NULL.base| 0))' at error location [2022-12-14 14:52:24,232 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 14:52:24,233 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 14:52:24,233 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 6, 12] total 31 [2022-12-14 14:52:24,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535676080] [2022-12-14 14:52:24,233 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 14:52:24,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-12-14 14:52:24,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:52:24,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-12-14 14:52:24,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=629, Invalid=8683, Unknown=0, NotChecked=0, Total=9312 [2022-12-14 14:52:24,235 INFO L87 Difference]: Start difference. First operand 9100 states and 10342 transitions. Second operand has 31 states, 20 states have (on average 11.3) internal successors, (226), 24 states have internal predecessors, (226), 12 states have call successors, (43), 8 states have call predecessors, (43), 17 states have return successors, (45), 12 states have call predecessors, (45), 12 states have call successors, (45) [2022-12-14 14:52:30,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:52:30,575 INFO L93 Difference]: Finished difference Result 18098 states and 20760 transitions. [2022-12-14 14:52:30,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-12-14 14:52:30,576 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 20 states have (on average 11.3) internal successors, (226), 24 states have internal predecessors, (226), 12 states have call successors, (43), 8 states have call predecessors, (43), 17 states have return successors, (45), 12 states have call predecessors, (45), 12 states have call successors, (45) Word has length 191 [2022-12-14 14:52:30,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:52:30,590 INFO L225 Difference]: With dead ends: 18098 [2022-12-14 14:52:30,590 INFO L226 Difference]: Without dead ends: 10035 [2022-12-14 14:52:30,598 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 698 GetRequests, 484 SyntacticMatches, 35 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15575 ImplicationChecksByTransitivity, 32.5s TimeCoverageRelationStatistics Valid=2865, Invalid=29715, Unknown=0, NotChecked=0, Total=32580 [2022-12-14 14:52:30,598 INFO L413 NwaCegarLoop]: 97 mSDtfsCounter, 3271 mSDsluCounter, 1247 mSDsCounter, 0 mSdLazyCounter, 4251 mSolverCounterSat, 1650 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3272 SdHoareTripleChecker+Valid, 1344 SdHoareTripleChecker+Invalid, 5901 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1650 IncrementalHoareTripleChecker+Valid, 4251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-12-14 14:52:30,598 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3272 Valid, 1344 Invalid, 5901 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1650 Valid, 4251 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-12-14 14:52:30,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10035 states. [2022-12-14 14:52:31,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10035 to 7582. [2022-12-14 14:52:31,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7582 states, 6199 states have (on average 1.146313921600258) internal successors, (7106), 6227 states have internal predecessors, (7106), 722 states have call successors, (722), 660 states have call predecessors, (722), 660 states have return successors, (722), 694 states have call predecessors, (722), 722 states have call successors, (722) [2022-12-14 14:52:31,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7582 states to 7582 states and 8550 transitions. [2022-12-14 14:52:31,866 INFO L78 Accepts]: Start accepts. Automaton has 7582 states and 8550 transitions. Word has length 191 [2022-12-14 14:52:31,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:52:31,866 INFO L495 AbstractCegarLoop]: Abstraction has 7582 states and 8550 transitions. [2022-12-14 14:52:31,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 20 states have (on average 11.3) internal successors, (226), 24 states have internal predecessors, (226), 12 states have call successors, (43), 8 states have call predecessors, (43), 17 states have return successors, (45), 12 states have call predecessors, (45), 12 states have call successors, (45) [2022-12-14 14:52:31,866 INFO L276 IsEmpty]: Start isEmpty. Operand 7582 states and 8550 transitions. [2022-12-14 14:52:31,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2022-12-14 14:52:31,869 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:52:31,869 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:52:31,874 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada0ff56-d2b0-4096-932e-f41a9e68e7a1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-12-14 14:52:32,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada0ff56-d2b0-4096-932e-f41a9e68e7a1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-12-14 14:52:32,071 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:52:32,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:52:32,072 INFO L85 PathProgramCache]: Analyzing trace with hash 441692476, now seen corresponding path program 1 times [2022-12-14 14:52:32,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:52:32,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972982310] [2022-12-14 14:52:32,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:52:32,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:52:32,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:52:32,194 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 56 proven. 55 refuted. 0 times theorem prover too weak. 214 trivial. 0 not checked. [2022-12-14 14:52:32,194 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:52:32,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972982310] [2022-12-14 14:52:32,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972982310] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:52:32,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674075859] [2022-12-14 14:52:32,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:52:32,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:52:32,194 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada0ff56-d2b0-4096-932e-f41a9e68e7a1/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:52:32,195 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada0ff56-d2b0-4096-932e-f41a9e68e7a1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:52:32,196 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada0ff56-d2b0-4096-932e-f41a9e68e7a1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-12-14 14:52:32,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:52:32,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 940 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 14:52:32,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:52:32,326 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 199 proven. 0 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2022-12-14 14:52:32,326 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 14:52:32,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [674075859] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:52:32,326 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 14:52:32,326 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2022-12-14 14:52:32,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937968144] [2022-12-14 14:52:32,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:52:32,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 14:52:32,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:52:32,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 14:52:32,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-12-14 14:52:32,328 INFO L87 Difference]: Start difference. First operand 7582 states and 8550 transitions. Second operand has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 3 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2022-12-14 14:52:33,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:52:33,963 INFO L93 Difference]: Finished difference Result 14607 states and 16393 transitions. [2022-12-14 14:52:33,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 14:52:33,964 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 3 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 209 [2022-12-14 14:52:33,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:52:33,974 INFO L225 Difference]: With dead ends: 14607 [2022-12-14 14:52:33,974 INFO L226 Difference]: Without dead ends: 7954 [2022-12-14 14:52:33,980 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 211 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-12-14 14:52:33,981 INFO L413 NwaCegarLoop]: 187 mSDtfsCounter, 86 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 454 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 14:52:33,981 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 454 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 14:52:33,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7954 states. [2022-12-14 14:52:35,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7954 to 7647. [2022-12-14 14:52:35,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7647 states, 6248 states have (on average 1.117157490396927) internal successors, (6980), 6279 states have internal predecessors, (6980), 734 states have call successors, (734), 664 states have call predecessors, (734), 664 states have return successors, (734), 703 states have call predecessors, (734), 734 states have call successors, (734) [2022-12-14 14:52:35,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7647 states to 7647 states and 8448 transitions. [2022-12-14 14:52:35,322 INFO L78 Accepts]: Start accepts. Automaton has 7647 states and 8448 transitions. Word has length 209 [2022-12-14 14:52:35,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:52:35,322 INFO L495 AbstractCegarLoop]: Abstraction has 7647 states and 8448 transitions. [2022-12-14 14:52:35,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 3 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2022-12-14 14:52:35,322 INFO L276 IsEmpty]: Start isEmpty. Operand 7647 states and 8448 transitions. [2022-12-14 14:52:35,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2022-12-14 14:52:35,326 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:52:35,326 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:52:35,332 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada0ff56-d2b0-4096-932e-f41a9e68e7a1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-12-14 14:52:35,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada0ff56-d2b0-4096-932e-f41a9e68e7a1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:52:35,527 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:52:35,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:52:35,528 INFO L85 PathProgramCache]: Analyzing trace with hash -463355076, now seen corresponding path program 2 times [2022-12-14 14:52:35,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:52:35,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742291128] [2022-12-14 14:52:35,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:52:35,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:52:35,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:52:35,669 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 51 proven. 63 refuted. 0 times theorem prover too weak. 211 trivial. 0 not checked. [2022-12-14 14:52:35,669 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:52:35,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742291128] [2022-12-14 14:52:35,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742291128] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:52:35,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383018617] [2022-12-14 14:52:35,670 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 14:52:35,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:52:35,670 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada0ff56-d2b0-4096-932e-f41a9e68e7a1/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:52:35,671 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada0ff56-d2b0-4096-932e-f41a9e68e7a1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:52:35,672 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada0ff56-d2b0-4096-932e-f41a9e68e7a1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-12-14 14:52:35,741 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-14 14:52:35,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 14:52:35,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-14 14:52:35,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:52:35,760 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 150 proven. 0 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2022-12-14 14:52:35,760 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 14:52:35,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1383018617] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:52:35,760 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 14:52:35,761 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 6 [2022-12-14 14:52:35,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200922038] [2022-12-14 14:52:35,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:52:35,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 14:52:35,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:52:35,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 14:52:35,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 14:52:35,762 INFO L87 Difference]: Start difference. First operand 7647 states and 8448 transitions. Second operand has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) [2022-12-14 14:52:36,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:52:36,750 INFO L93 Difference]: Finished difference Result 11478 states and 12589 transitions. [2022-12-14 14:52:36,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 14:52:36,751 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) Word has length 209 [2022-12-14 14:52:36,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:52:36,757 INFO L225 Difference]: With dead ends: 11478 [2022-12-14 14:52:36,757 INFO L226 Difference]: Without dead ends: 4662 [2022-12-14 14:52:36,762 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-12-14 14:52:36,762 INFO L413 NwaCegarLoop]: 150 mSDtfsCounter, 72 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 386 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 14:52:36,762 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 386 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 14:52:36,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4662 states. [2022-12-14 14:52:37,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4662 to 4403. [2022-12-14 14:52:37,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4403 states, 3626 states have (on average 1.0984555984555984) internal successors, (3983), 3644 states have internal predecessors, (3983), 404 states have call successors, (404), 372 states have call predecessors, (404), 372 states have return successors, (404), 386 states have call predecessors, (404), 404 states have call successors, (404) [2022-12-14 14:52:37,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4403 states to 4403 states and 4791 transitions. [2022-12-14 14:52:37,585 INFO L78 Accepts]: Start accepts. Automaton has 4403 states and 4791 transitions. Word has length 209 [2022-12-14 14:52:37,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:52:37,585 INFO L495 AbstractCegarLoop]: Abstraction has 4403 states and 4791 transitions. [2022-12-14 14:52:37,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 2 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) [2022-12-14 14:52:37,585 INFO L276 IsEmpty]: Start isEmpty. Operand 4403 states and 4791 transitions. [2022-12-14 14:52:37,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2022-12-14 14:52:37,589 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:52:37,589 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:52:37,593 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada0ff56-d2b0-4096-932e-f41a9e68e7a1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-12-14 14:52:37,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada0ff56-d2b0-4096-932e-f41a9e68e7a1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:52:37,790 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:52:37,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:52:37,791 INFO L85 PathProgramCache]: Analyzing trace with hash -492381883, now seen corresponding path program 1 times [2022-12-14 14:52:37,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:52:37,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735140540] [2022-12-14 14:52:37,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:52:37,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:52:37,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:52:37,939 INFO L134 CoverageAnalysis]: Checked inductivity of 327 backedges. 53 proven. 63 refuted. 0 times theorem prover too weak. 211 trivial. 0 not checked. [2022-12-14 14:52:37,939 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:52:37,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735140540] [2022-12-14 14:52:37,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735140540] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:52:37,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441906749] [2022-12-14 14:52:37,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:52:37,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:52:37,939 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada0ff56-d2b0-4096-932e-f41a9e68e7a1/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:52:37,940 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada0ff56-d2b0-4096-932e-f41a9e68e7a1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:52:37,941 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada0ff56-d2b0-4096-932e-f41a9e68e7a1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-12-14 14:52:38,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:52:38,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 947 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 14:52:38,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:52:38,101 INFO L134 CoverageAnalysis]: Checked inductivity of 327 backedges. 202 proven. 0 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2022-12-14 14:52:38,101 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 14:52:38,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1441906749] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:52:38,101 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 14:52:38,101 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 7 [2022-12-14 14:52:38,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708524541] [2022-12-14 14:52:38,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:52:38,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 14:52:38,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:52:38,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 14:52:38,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-12-14 14:52:38,102 INFO L87 Difference]: Start difference. First operand 4403 states and 4791 transitions. Second operand has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) [2022-12-14 14:52:38,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:52:38,799 INFO L93 Difference]: Finished difference Result 6979 states and 7560 transitions. [2022-12-14 14:52:38,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 14:52:38,800 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) Word has length 210 [2022-12-14 14:52:38,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:52:38,804 INFO L225 Difference]: With dead ends: 6979 [2022-12-14 14:52:38,804 INFO L226 Difference]: Without dead ends: 3616 [2022-12-14 14:52:38,807 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 213 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-12-14 14:52:38,807 INFO L413 NwaCegarLoop]: 151 mSDtfsCounter, 71 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 392 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 14:52:38,808 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 392 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 14:52:38,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3616 states. [2022-12-14 14:52:39,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3616 to 3324. [2022-12-14 14:52:39,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3324 states, 2761 states have (on average 1.098515030785947) internal successors, (3033), 2771 states have internal predecessors, (3033), 289 states have call successors, (289), 273 states have call predecessors, (289), 273 states have return successors, (289), 279 states have call predecessors, (289), 289 states have call successors, (289) [2022-12-14 14:52:39,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3324 states to 3324 states and 3611 transitions. [2022-12-14 14:52:39,436 INFO L78 Accepts]: Start accepts. Automaton has 3324 states and 3611 transitions. Word has length 210 [2022-12-14 14:52:39,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:52:39,436 INFO L495 AbstractCegarLoop]: Abstraction has 3324 states and 3611 transitions. [2022-12-14 14:52:39,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 2 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) [2022-12-14 14:52:39,436 INFO L276 IsEmpty]: Start isEmpty. Operand 3324 states and 3611 transitions. [2022-12-14 14:52:39,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2022-12-14 14:52:39,438 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 14:52:39,439 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 14:52:39,443 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada0ff56-d2b0-4096-932e-f41a9e68e7a1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-12-14 14:52:39,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada0ff56-d2b0-4096-932e-f41a9e68e7a1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:52:39,640 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 14:52:39,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 14:52:39,641 INFO L85 PathProgramCache]: Analyzing trace with hash -958289530, now seen corresponding path program 1 times [2022-12-14 14:52:39,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 14:52:39,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48353153] [2022-12-14 14:52:39,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:52:39,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 14:52:39,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:52:39,885 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 156 proven. 38 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-12-14 14:52:39,885 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 14:52:39,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48353153] [2022-12-14 14:52:39,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48353153] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 14:52:39,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859841007] [2022-12-14 14:52:39,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 14:52:39,886 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:52:39,886 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada0ff56-d2b0-4096-932e-f41a9e68e7a1/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 14:52:39,887 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada0ff56-d2b0-4096-932e-f41a9e68e7a1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 14:52:39,887 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada0ff56-d2b0-4096-932e-f41a9e68e7a1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-12-14 14:52:40,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 14:52:40,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 954 conjuncts, 34 conjunts are in the unsatisfiable core [2022-12-14 14:52:40,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 14:52:40,064 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 255 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-12-14 14:52:40,064 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 14:52:40,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [859841007] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 14:52:40,064 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 14:52:40,065 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 5 [2022-12-14 14:52:40,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147188016] [2022-12-14 14:52:40,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 14:52:40,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 14:52:40,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 14:52:40,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 14:52:40,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 14:52:40,065 INFO L87 Difference]: Start difference. First operand 3324 states and 3611 transitions. Second operand has 5 states, 5 states have (on average 26.4) internal successors, (132), 5 states have internal predecessors, (132), 4 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2022-12-14 14:52:40,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 14:52:40,433 INFO L93 Difference]: Finished difference Result 3781 states and 4101 transitions. [2022-12-14 14:52:40,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 14:52:40,434 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 26.4) internal successors, (132), 5 states have internal predecessors, (132), 4 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) Word has length 211 [2022-12-14 14:52:40,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 14:52:40,434 INFO L225 Difference]: With dead ends: 3781 [2022-12-14 14:52:40,434 INFO L226 Difference]: Without dead ends: 0 [2022-12-14 14:52:40,437 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 224 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-12-14 14:52:40,437 INFO L413 NwaCegarLoop]: 129 mSDtfsCounter, 84 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 14:52:40,437 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 273 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 14:52:40,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-12-14 14:52:40,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-12-14 14:52:40,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 14:52:40,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-12-14 14:52:40,438 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 211 [2022-12-14 14:52:40,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 14:52:40,438 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-12-14 14:52:40,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.4) internal successors, (132), 5 states have internal predecessors, (132), 4 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2022-12-14 14:52:40,438 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-12-14 14:52:40,438 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-12-14 14:52:40,440 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2022-12-14 14:52:40,440 INFO L805 garLoopResultBuilder]: Registering result SAFE for location error1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-12-14 14:52:40,445 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada0ff56-d2b0-4096-932e-f41a9e68e7a1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-12-14 14:52:40,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ada0ff56-d2b0-4096-932e-f41a9e68e7a1/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 14:52:40,646 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-12-14 14:52:51,382 WARN L233 SmtUtils]: Spent 5.17s on a formula simplification. DAG size of input: 149 DAG size of output: 145 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-12-14 14:53:08,322 WARN L233 SmtUtils]: Spent 11.55s on a formula simplification. DAG size of input: 145 DAG size of output: 133 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-12-14 14:53:19,793 WARN L233 SmtUtils]: Spent 11.45s on a formula simplification. DAG size of input: 145 DAG size of output: 133 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-12-14 14:56:05,444 WARN L233 SmtUtils]: Spent 2.65m on a formula simplification. DAG size of input: 1059 DAG size of output: 931 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-12-14 14:59:02,838 WARN L233 SmtUtils]: Spent 2.96m on a formula simplification. DAG size of input: 439 DAG size of output: 401 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-12-14 14:59:09,902 WARN L233 SmtUtils]: Spent 7.06s on a formula simplification. DAG size of input: 453 DAG size of output: 415 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-12-14 14:59:45,110 WARN L233 SmtUtils]: Spent 35.21s on a formula simplification. DAG size of input: 434 DAG size of output: 413 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or)