./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.09.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b4ec56b 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_2cad1fe2-f6eb-4ec8-a59a-19b5e2016a28/bin/utaipan-6cKwYrpEi9/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cad1fe2-f6eb-4ec8-a59a-19b5e2016a28/bin/utaipan-6cKwYrpEi9/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cad1fe2-f6eb-4ec8-a59a-19b5e2016a28/bin/utaipan-6cKwYrpEi9/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cad1fe2-f6eb-4ec8-a59a-19b5e2016a28/bin/utaipan-6cKwYrpEi9/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.09.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cad1fe2-f6eb-4ec8-a59a-19b5e2016a28/bin/utaipan-6cKwYrpEi9/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cad1fe2-f6eb-4ec8-a59a-19b5e2016a28/bin/utaipan-6cKwYrpEi9 --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 2cb37d56f61ec273f723a733aad4526e011a3841f34b26767a03fdc541dd1ee3 --- 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-6b4ec56 [2022-11-20 21:01:49,711 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 21:01:49,713 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 21:01:49,735 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 21:01:49,735 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 21:01:49,737 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 21:01:49,738 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 21:01:49,740 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 21:01:49,741 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 21:01:49,742 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 21:01:49,744 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 21:01:49,745 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 21:01:49,745 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 21:01:49,746 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 21:01:49,748 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 21:01:49,749 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 21:01:49,750 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 21:01:49,751 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 21:01:49,753 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 21:01:49,755 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 21:01:49,756 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 21:01:49,758 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 21:01:49,759 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 21:01:49,761 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 21:01:49,765 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 21:01:49,765 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 21:01:49,766 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 21:01:49,767 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 21:01:49,767 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 21:01:49,769 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 21:01:49,769 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 21:01:49,770 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 21:01:49,771 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 21:01:49,772 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 21:01:49,773 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 21:01:49,774 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 21:01:49,775 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 21:01:49,775 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 21:01:49,775 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 21:01:49,776 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 21:01:49,777 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 21:01:49,778 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cad1fe2-f6eb-4ec8-a59a-19b5e2016a28/bin/utaipan-6cKwYrpEi9/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-20 21:01:49,820 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 21:01:49,821 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 21:01:49,821 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 21:01:49,822 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 21:01:49,823 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 21:01:49,823 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 21:01:49,823 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-20 21:01:49,823 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-20 21:01:49,824 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-20 21:01:49,824 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-20 21:01:49,825 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-20 21:01:49,825 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-20 21:01:49,825 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-20 21:01:49,826 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-20 21:01:49,826 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-20 21:01:49,826 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-20 21:01:49,826 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-20 21:01:49,827 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-20 21:01:49,828 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 21:01:49,828 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 21:01:49,828 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 21:01:49,828 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 21:01:49,829 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 21:01:49,829 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 21:01:49,829 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 21:01:49,829 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 21:01:49,830 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 21:01:49,830 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 21:01:49,831 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 21:01:49,831 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 21:01:49,831 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 21:01:49,831 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 21:01:49,832 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 21:01:49,832 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 21:01:49,832 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-20 21:01:49,832 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 21:01:49,833 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 21:01:49,833 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-20 21:01:49,833 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 21:01:49,833 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 21:01:49,833 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-20 21:01:49,834 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_2cad1fe2-f6eb-4ec8-a59a-19b5e2016a28/bin/utaipan-6cKwYrpEi9/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cad1fe2-f6eb-4ec8-a59a-19b5e2016a28/bin/utaipan-6cKwYrpEi9 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2cb37d56f61ec273f723a733aad4526e011a3841f34b26767a03fdc541dd1ee3 [2022-11-20 21:01:50,112 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 21:01:50,139 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 21:01:50,142 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 21:01:50,144 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 21:01:50,144 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 21:01:50,146 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cad1fe2-f6eb-4ec8-a59a-19b5e2016a28/bin/utaipan-6cKwYrpEi9/../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.09.cil-1.c [2022-11-20 21:01:53,107 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 21:01:53,451 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 21:01:53,451 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cad1fe2-f6eb-4ec8-a59a-19b5e2016a28/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.09.cil-1.c [2022-11-20 21:01:53,480 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cad1fe2-f6eb-4ec8-a59a-19b5e2016a28/bin/utaipan-6cKwYrpEi9/data/e1a7cfd48/5bea0ed7e70e4f6eaf06462e54ba63b3/FLAG1dab105e4 [2022-11-20 21:01:53,498 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cad1fe2-f6eb-4ec8-a59a-19b5e2016a28/bin/utaipan-6cKwYrpEi9/data/e1a7cfd48/5bea0ed7e70e4f6eaf06462e54ba63b3 [2022-11-20 21:01:53,504 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 21:01:53,507 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 21:01:53,510 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 21:01:53,511 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 21:01:53,514 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 21:01:53,515 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 09:01:53" (1/1) ... [2022-11-20 21:01:53,516 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3814b6b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:01:53, skipping insertion in model container [2022-11-20 21:01:53,517 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 09:01:53" (1/1) ... [2022-11-20 21:01:53,525 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 21:01:53,577 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 21:01:53,744 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cad1fe2-f6eb-4ec8-a59a-19b5e2016a28/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.09.cil-1.c[914,927] [2022-11-20 21:01:53,808 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_2cad1fe2-f6eb-4ec8-a59a-19b5e2016a28/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.09.cil-1.c[7115,7128] [2022-11-20 21:01:53,903 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 21:01:53,916 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 21:01:53,929 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_2cad1fe2-f6eb-4ec8-a59a-19b5e2016a28/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.09.cil-1.c[914,927] [2022-11-20 21:01:53,957 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_2cad1fe2-f6eb-4ec8-a59a-19b5e2016a28/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.09.cil-1.c[7115,7128] [2022-11-20 21:01:54,058 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 21:01:54,087 INFO L208 MainTranslator]: Completed translation [2022-11-20 21:01:54,087 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:01:54 WrapperNode [2022-11-20 21:01:54,088 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 21:01:54,089 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 21:01:54,089 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 21:01:54,089 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 21:01:54,096 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:01:54" (1/1) ... [2022-11-20 21:01:54,131 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:01:54" (1/1) ... [2022-11-20 21:01:54,188 INFO L138 Inliner]: procedures = 71, calls = 84, calls flagged for inlining = 40, calls inlined = 40, statements flattened = 866 [2022-11-20 21:01:54,188 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 21:01:54,189 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 21:01:54,189 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 21:01:54,189 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 21:01:54,206 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:01:54" (1/1) ... [2022-11-20 21:01:54,206 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:01:54" (1/1) ... [2022-11-20 21:01:54,211 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:01:54" (1/1) ... [2022-11-20 21:01:54,212 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:01:54" (1/1) ... [2022-11-20 21:01:54,226 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:01:54" (1/1) ... [2022-11-20 21:01:54,240 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:01:54" (1/1) ... [2022-11-20 21:01:54,244 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:01:54" (1/1) ... [2022-11-20 21:01:54,247 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:01:54" (1/1) ... [2022-11-20 21:01:54,253 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 21:01:54,254 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 21:01:54,255 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 21:01:54,255 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 21:01:54,256 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:01:54" (1/1) ... [2022-11-20 21:01:54,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 21:01:54,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cad1fe2-f6eb-4ec8-a59a-19b5e2016a28/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:01:54,302 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cad1fe2-f6eb-4ec8-a59a-19b5e2016a28/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 21:01:54,307 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cad1fe2-f6eb-4ec8-a59a-19b5e2016a28/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 21:01:54,345 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 21:01:54,345 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-11-20 21:01:54,346 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-11-20 21:01:54,346 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2022-11-20 21:01:54,346 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2022-11-20 21:01:54,346 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2022-11-20 21:01:54,347 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2022-11-20 21:01:54,347 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2022-11-20 21:01:54,347 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2022-11-20 21:01:54,347 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2022-11-20 21:01:54,347 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2022-11-20 21:01:54,348 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2022-11-20 21:01:54,348 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2022-11-20 21:01:54,348 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2022-11-20 21:01:54,348 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2022-11-20 21:01:54,348 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2022-11-20 21:01:54,349 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2022-11-20 21:01:54,349 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2022-11-20 21:01:54,349 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2022-11-20 21:01:54,349 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2022-11-20 21:01:54,350 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2022-11-20 21:01:54,350 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2022-11-20 21:01:54,351 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2022-11-20 21:01:54,351 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 21:01:54,352 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2022-11-20 21:01:54,352 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2022-11-20 21:01:54,353 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2022-11-20 21:01:54,355 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2022-11-20 21:01:54,356 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 21:01:54,356 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 21:01:54,356 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2022-11-20 21:01:54,356 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2022-11-20 21:01:54,497 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 21:01:54,499 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 21:01:55,599 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 21:01:56,054 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 21:01:56,055 INFO L300 CfgBuilder]: Removed 16 assume(true) statements. [2022-11-20 21:01:56,066 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 09:01:56 BoogieIcfgContainer [2022-11-20 21:01:56,066 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 21:01:56,069 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 21:01:56,070 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 21:01:56,073 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 21:01:56,073 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 09:01:53" (1/3) ... [2022-11-20 21:01:56,075 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7970f7eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 09:01:56, skipping insertion in model container [2022-11-20 21:01:56,076 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:01:54" (2/3) ... [2022-11-20 21:01:56,077 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7970f7eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 09:01:56, skipping insertion in model container [2022-11-20 21:01:56,077 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 09:01:56" (3/3) ... [2022-11-20 21:01:56,087 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_2.cil-1+token_ring.09.cil-1.c [2022-11-20 21:01:56,106 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 21:01:56,107 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-20 21:01:56,174 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 21:01:56,182 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;@7cff305, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 21:01:56,182 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-20 21:01:56,188 INFO L276 IsEmpty]: Start isEmpty. Operand has 227 states, 173 states have (on average 1.5317919075144508) internal successors, (265), 179 states have internal predecessors, (265), 37 states have call successors, (37), 14 states have call predecessors, (37), 14 states have return successors, (37), 36 states have call predecessors, (37), 37 states have call successors, (37) [2022-11-20 21:01:56,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-20 21:01:56,197 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:01:56,198 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:01:56,199 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:01:56,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:01:56,204 INFO L85 PathProgramCache]: Analyzing trace with hash 1910028162, now seen corresponding path program 1 times [2022-11-20 21:01:56,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:01:56,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683240853] [2022-11-20 21:01:56,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:01:56,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:01:56,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:01:56,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:01:56,807 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:01:56,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683240853] [2022-11-20 21:01:56,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683240853] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:01:56,808 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:01:56,808 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-20 21:01:56,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368976490] [2022-11-20 21:01:56,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:01:56,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 21:01:56,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:01:56,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 21:01:56,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-20 21:01:56,845 INFO L87 Difference]: Start difference. First operand has 227 states, 173 states have (on average 1.5317919075144508) internal successors, (265), 179 states have internal predecessors, (265), 37 states have call successors, (37), 14 states have call predecessors, (37), 14 states have return successors, (37), 36 states have call predecessors, (37), 37 states have call successors, (37) Second operand has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-20 21:01:57,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:01:57,904 INFO L93 Difference]: Finished difference Result 511 states and 746 transitions. [2022-11-20 21:01:57,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-20 21:01:57,907 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 45 [2022-11-20 21:01:57,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:01:57,934 INFO L225 Difference]: With dead ends: 511 [2022-11-20 21:01:57,934 INFO L226 Difference]: Without dead ends: 287 [2022-11-20 21:01:57,943 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-20 21:01:57,949 INFO L413 NwaCegarLoop]: 185 mSDtfsCounter, 497 mSDsluCounter, 653 mSDsCounter, 0 mSdLazyCounter, 873 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 526 SdHoareTripleChecker+Valid, 838 SdHoareTripleChecker+Invalid, 988 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 873 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-20 21:01:57,951 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [526 Valid, 838 Invalid, 988 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 873 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-20 21:01:57,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2022-11-20 21:01:58,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 274. [2022-11-20 21:01:58,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 207 states have (on average 1.4492753623188406) internal successors, (300), 211 states have internal predecessors, (300), 45 states have call successors, (45), 21 states have call predecessors, (45), 20 states have return successors, (43), 43 states have call predecessors, (43), 43 states have call successors, (43) [2022-11-20 21:01:58,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 388 transitions. [2022-11-20 21:01:58,054 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 388 transitions. Word has length 45 [2022-11-20 21:01:58,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:01:58,055 INFO L495 AbstractCegarLoop]: Abstraction has 274 states and 388 transitions. [2022-11-20 21:01:58,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-20 21:01:58,056 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 388 transitions. [2022-11-20 21:01:58,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-20 21:01:58,064 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:01:58,064 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:01:58,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 21:01:58,065 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:01:58,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:01:58,066 INFO L85 PathProgramCache]: Analyzing trace with hash 739623069, now seen corresponding path program 1 times [2022-11-20 21:01:58,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:01:58,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027480597] [2022-11-20 21:01:58,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:01:58,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:01:58,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:01:58,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:01:58,191 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:01:58,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027480597] [2022-11-20 21:01:58,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027480597] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:01:58,194 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:01:58,194 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 21:01:58,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924929005] [2022-11-20 21:01:58,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:01:58,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 21:01:58,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:01:58,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 21:01:58,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:01:58,200 INFO L87 Difference]: Start difference. First operand 274 states and 388 transitions. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-20 21:01:58,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:01:58,346 INFO L93 Difference]: Finished difference Result 499 states and 675 transitions. [2022-11-20 21:01:58,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 21:01:58,347 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 46 [2022-11-20 21:01:58,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:01:58,353 INFO L225 Difference]: With dead ends: 499 [2022-11-20 21:01:58,354 INFO L226 Difference]: Without dead ends: 383 [2022-11-20 21:01:58,358 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:01:58,389 INFO L413 NwaCegarLoop]: 277 mSDtfsCounter, 299 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 299 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 21:01:58,389 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [299 Valid, 340 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 21:01:58,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2022-11-20 21:01:58,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 369. [2022-11-20 21:01:58,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 369 states, 272 states have (on average 1.3970588235294117) internal successors, (380), 276 states have internal predecessors, (380), 61 states have call successors, (61), 35 states have call predecessors, (61), 34 states have return successors, (59), 59 states have call predecessors, (59), 59 states have call successors, (59) [2022-11-20 21:01:58,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 500 transitions. [2022-11-20 21:01:58,440 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 500 transitions. Word has length 46 [2022-11-20 21:01:58,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:01:58,441 INFO L495 AbstractCegarLoop]: Abstraction has 369 states and 500 transitions. [2022-11-20 21:01:58,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-20 21:01:58,441 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 500 transitions. [2022-11-20 21:01:58,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-20 21:01:58,443 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:01:58,443 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:01:58,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-20 21:01:58,444 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:01:58,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:01:58,444 INFO L85 PathProgramCache]: Analyzing trace with hash -1723340753, now seen corresponding path program 1 times [2022-11-20 21:01:58,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:01:58,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189041382] [2022-11-20 21:01:58,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:01:58,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:01:58,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:01:58,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:01:58,504 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:01:58,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189041382] [2022-11-20 21:01:58,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189041382] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:01:58,505 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:01:58,505 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 21:01:58,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674584684] [2022-11-20 21:01:58,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:01:58,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 21:01:58,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:01:58,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 21:01:58,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:01:58,508 INFO L87 Difference]: Start difference. First operand 369 states and 500 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-20 21:01:58,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:01:58,673 INFO L93 Difference]: Finished difference Result 733 states and 948 transitions. [2022-11-20 21:01:58,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 21:01:58,674 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), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 47 [2022-11-20 21:01:58,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:01:58,677 INFO L225 Difference]: With dead ends: 733 [2022-11-20 21:01:58,677 INFO L226 Difference]: Without dead ends: 523 [2022-11-20 21:01:58,678 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:01:58,679 INFO L413 NwaCegarLoop]: 279 mSDtfsCounter, 68 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 528 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 21:01:58,680 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 528 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 21:01:58,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2022-11-20 21:01:58,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 519. [2022-11-20 21:01:58,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 519 states, 377 states have (on average 1.3660477453580901) internal successors, (515), 381 states have internal predecessors, (515), 85 states have call successors, (85), 56 states have call predecessors, (85), 55 states have return successors, (83), 83 states have call predecessors, (83), 83 states have call successors, (83) [2022-11-20 21:01:58,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 519 states to 519 states and 683 transitions. [2022-11-20 21:01:58,725 INFO L78 Accepts]: Start accepts. Automaton has 519 states and 683 transitions. Word has length 47 [2022-11-20 21:01:58,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:01:58,726 INFO L495 AbstractCegarLoop]: Abstraction has 519 states and 683 transitions. [2022-11-20 21:01:58,726 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), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-20 21:01:58,726 INFO L276 IsEmpty]: Start isEmpty. Operand 519 states and 683 transitions. [2022-11-20 21:01:58,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-20 21:01:58,728 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:01:58,728 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:01:58,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-20 21:01:58,728 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:01:58,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:01:58,729 INFO L85 PathProgramCache]: Analyzing trace with hash 2100194830, now seen corresponding path program 1 times [2022-11-20 21:01:58,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:01:58,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046443930] [2022-11-20 21:01:58,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:01:58,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:01:58,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:01:58,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:01:58,780 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:01:58,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046443930] [2022-11-20 21:01:58,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046443930] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:01:58,781 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:01:58,781 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 21:01:58,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234416511] [2022-11-20 21:01:58,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:01:58,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 21:01:58,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:01:58,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 21:01:58,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:01:58,783 INFO L87 Difference]: Start difference. First operand 519 states and 683 transitions. Second operand has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-20 21:01:58,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:01:58,934 INFO L93 Difference]: Finished difference Result 943 states and 1205 transitions. [2022-11-20 21:01:58,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 21:01:58,934 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 53 [2022-11-20 21:01:58,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:01:58,938 INFO L225 Difference]: With dead ends: 943 [2022-11-20 21:01:58,938 INFO L226 Difference]: Without dead ends: 582 [2022-11-20 21:01:58,939 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:01:58,940 INFO L413 NwaCegarLoop]: 285 mSDtfsCounter, 299 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 299 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 21:01:58,941 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [299 Valid, 347 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 21:01:58,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 582 states. [2022-11-20 21:01:59,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 582 to 570. [2022-11-20 21:01:59,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 570 states, 413 states have (on average 1.3486682808716708) internal successors, (557), 417 states have internal predecessors, (557), 93 states have call successors, (93), 63 states have call predecessors, (93), 62 states have return successors, (91), 91 states have call predecessors, (91), 91 states have call successors, (91) [2022-11-20 21:01:59,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 570 states to 570 states and 741 transitions. [2022-11-20 21:01:59,009 INFO L78 Accepts]: Start accepts. Automaton has 570 states and 741 transitions. Word has length 53 [2022-11-20 21:01:59,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:01:59,009 INFO L495 AbstractCegarLoop]: Abstraction has 570 states and 741 transitions. [2022-11-20 21:01:59,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-20 21:01:59,010 INFO L276 IsEmpty]: Start isEmpty. Operand 570 states and 741 transitions. [2022-11-20 21:01:59,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-20 21:01:59,011 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:01:59,011 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-20 21:01:59,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-20 21:01:59,012 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:01:59,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:01:59,012 INFO L85 PathProgramCache]: Analyzing trace with hash 164820616, now seen corresponding path program 1 times [2022-11-20 21:01:59,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:01:59,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316958644] [2022-11-20 21:01:59,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:01:59,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:01:59,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:01:59,101 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:01:59,102 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:01:59,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316958644] [2022-11-20 21:01:59,102 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316958644] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:01:59,102 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:01:59,103 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 21:01:59,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117774042] [2022-11-20 21:01:59,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:01:59,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 21:01:59,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:01:59,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 21:01:59,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 21:01:59,105 INFO L87 Difference]: Start difference. First operand 570 states and 741 transitions. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-11-20 21:01:59,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:01:59,412 INFO L93 Difference]: Finished difference Result 679 states and 873 transitions. [2022-11-20 21:01:59,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 21:01:59,412 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 54 [2022-11-20 21:01:59,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:01:59,415 INFO L225 Difference]: With dead ends: 679 [2022-11-20 21:01:59,416 INFO L226 Difference]: Without dead ends: 676 [2022-11-20 21:01:59,416 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 [2022-11-20 21:01:59,417 INFO L413 NwaCegarLoop]: 282 mSDtfsCounter, 540 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 540 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 21:01:59,418 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [540 Valid, 326 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 21:01:59,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 676 states. [2022-11-20 21:01:59,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 676 to 569. [2022-11-20 21:01:59,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 569 states, 413 states have (on average 1.341404358353511) internal successors, (554), 416 states have internal predecessors, (554), 92 states have call successors, (92), 63 states have call predecessors, (92), 62 states have return successors, (91), 91 states have call predecessors, (91), 91 states have call successors, (91) [2022-11-20 21:01:59,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 569 states to 569 states and 737 transitions. [2022-11-20 21:01:59,473 INFO L78 Accepts]: Start accepts. Automaton has 569 states and 737 transitions. Word has length 54 [2022-11-20 21:01:59,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:01:59,474 INFO L495 AbstractCegarLoop]: Abstraction has 569 states and 737 transitions. [2022-11-20 21:01:59,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-11-20 21:01:59,474 INFO L276 IsEmpty]: Start isEmpty. Operand 569 states and 737 transitions. [2022-11-20 21:01:59,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-20 21:01:59,475 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:01:59,476 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:01:59,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-20 21:01:59,476 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:01:59,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:01:59,477 INFO L85 PathProgramCache]: Analyzing trace with hash 813258136, now seen corresponding path program 1 times [2022-11-20 21:01:59,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:01:59,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092516204] [2022-11-20 21:01:59,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:01:59,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:01:59,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:01:59,671 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:01:59,672 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:01:59,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092516204] [2022-11-20 21:01:59,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092516204] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:01:59,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046619395] [2022-11-20 21:01:59,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:01:59,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:01:59,673 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cad1fe2-f6eb-4ec8-a59a-19b5e2016a28/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:01:59,683 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cad1fe2-f6eb-4ec8-a59a-19b5e2016a28/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:01:59,690 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cad1fe2-f6eb-4ec8-a59a-19b5e2016a28/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 21:01:59,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:01:59,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-20 21:01:59,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:02:00,213 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:02:00,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:02:00,407 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:02:00,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2046619395] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:02:00,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1419558803] [2022-11-20 21:02:00,436 INFO L159 IcfgInterpreter]: Started Sifa with 54 locations of interest [2022-11-20 21:02:00,437 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 21:02:00,443 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 21:02:00,449 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 21:02:00,449 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 21:02:06,556 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 175 for LOIs [2022-11-20 21:02:06,593 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 171 for LOIs [2022-11-20 21:02:06,624 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 179 for LOIs [2022-11-20 21:02:07,359 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 175 for LOIs [2022-11-20 21:02:07,478 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 175 for LOIs [2022-11-20 21:02:07,584 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 175 for LOIs [2022-11-20 21:02:07,624 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 182 for LOIs [2022-11-20 21:02:07,653 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 21:02:36,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1419558803] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:02:36,078 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-20 21:02:36,078 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [5, 5, 4] total 44 [2022-11-20 21:02:36,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716384590] [2022-11-20 21:02:36,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:02:36,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-20 21:02:36,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:02:36,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-20 21:02:36,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=1683, Unknown=0, NotChecked=0, Total=1892 [2022-11-20 21:02:36,083 INFO L87 Difference]: Start difference. First operand 569 states and 737 transitions. Second operand has 39 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 29 states have internal predecessors, (39), 8 states have call successors, (8), 7 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-20 21:03:16,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:03:16,669 INFO L93 Difference]: Finished difference Result 1028 states and 1284 transitions. [2022-11-20 21:03:16,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-11-20 21:03:16,670 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 29 states have internal predecessors, (39), 8 states have call successors, (8), 7 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 55 [2022-11-20 21:03:16,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:03:16,673 INFO L225 Difference]: With dead ends: 1028 [2022-11-20 21:03:16,673 INFO L226 Difference]: Without dead ends: 618 [2022-11-20 21:03:16,676 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 124 SyntacticMatches, 2 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1550 ImplicationChecksByTransitivity, 58.2s TimeCoverageRelationStatistics Valid=626, Invalid=4630, Unknown=0, NotChecked=0, Total=5256 [2022-11-20 21:03:16,677 INFO L413 NwaCegarLoop]: 252 mSDtfsCounter, 178 mSDsluCounter, 2056 mSDsCounter, 0 mSdLazyCounter, 5151 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 2308 SdHoareTripleChecker+Invalid, 5315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 5151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.5s IncrementalHoareTripleChecker+Time [2022-11-20 21:03:16,678 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [180 Valid, 2308 Invalid, 5315 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [164 Valid, 5151 Invalid, 0 Unknown, 0 Unchecked, 10.5s Time] [2022-11-20 21:03:16,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 618 states. [2022-11-20 21:03:16,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 618 to 603. [2022-11-20 21:03:16,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 603 states, 439 states have (on average 1.325740318906606) internal successors, (582), 442 states have internal predecessors, (582), 94 states have call successors, (94), 69 states have call predecessors, (94), 68 states have return successors, (93), 93 states have call predecessors, (93), 93 states have call successors, (93) [2022-11-20 21:03:16,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 603 states to 603 states and 769 transitions. [2022-11-20 21:03:16,770 INFO L78 Accepts]: Start accepts. Automaton has 603 states and 769 transitions. Word has length 55 [2022-11-20 21:03:16,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:03:16,771 INFO L495 AbstractCegarLoop]: Abstraction has 603 states and 769 transitions. [2022-11-20 21:03:16,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 29 states have internal predecessors, (39), 8 states have call successors, (8), 7 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-20 21:03:16,771 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states and 769 transitions. [2022-11-20 21:03:16,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-11-20 21:03:16,773 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:03:16,773 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:03:16,783 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cad1fe2-f6eb-4ec8-a59a-19b5e2016a28/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-20 21:03:16,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cad1fe2-f6eb-4ec8-a59a-19b5e2016a28/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:03:16,983 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:03:16,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:03:16,983 INFO L85 PathProgramCache]: Analyzing trace with hash 800912266, now seen corresponding path program 1 times [2022-11-20 21:03:16,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:03:16,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304630784] [2022-11-20 21:03:16,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:03:16,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:03:17,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:03:17,057 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 21:03:17,057 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:03:17,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304630784] [2022-11-20 21:03:17,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304630784] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:03:17,058 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:03:17,058 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 21:03:17,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660429517] [2022-11-20 21:03:17,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:03:17,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 21:03:17,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:03:17,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 21:03:17,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:03:17,060 INFO L87 Difference]: Start difference. First operand 603 states and 769 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-20 21:03:17,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:03:17,293 INFO L93 Difference]: Finished difference Result 1054 states and 1325 transitions. [2022-11-20 21:03:17,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 21:03:17,293 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 61 [2022-11-20 21:03:17,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:03:17,298 INFO L225 Difference]: With dead ends: 1054 [2022-11-20 21:03:17,298 INFO L226 Difference]: Without dead ends: 786 [2022-11-20 21:03:17,299 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:03:17,300 INFO L413 NwaCegarLoop]: 310 mSDtfsCounter, 44 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 575 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 21:03:17,301 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 575 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 21:03:17,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 786 states. [2022-11-20 21:03:17,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 786 to 657. [2022-11-20 21:03:17,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 657 states, 483 states have (on average 1.3271221532091098) internal successors, (641), 486 states have internal predecessors, (641), 99 states have call successors, (99), 74 states have call predecessors, (99), 73 states have return successors, (98), 98 states have call predecessors, (98), 98 states have call successors, (98) [2022-11-20 21:03:17,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 657 states to 657 states and 838 transitions. [2022-11-20 21:03:17,414 INFO L78 Accepts]: Start accepts. Automaton has 657 states and 838 transitions. Word has length 61 [2022-11-20 21:03:17,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:03:17,415 INFO L495 AbstractCegarLoop]: Abstraction has 657 states and 838 transitions. [2022-11-20 21:03:17,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-20 21:03:17,415 INFO L276 IsEmpty]: Start isEmpty. Operand 657 states and 838 transitions. [2022-11-20 21:03:17,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-11-20 21:03:17,417 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:03:17,417 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:03:17,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-20 21:03:17,417 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:03:17,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:03:17,418 INFO L85 PathProgramCache]: Analyzing trace with hash -785264281, now seen corresponding path program 1 times [2022-11-20 21:03:17,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:03:17,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155897100] [2022-11-20 21:03:17,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:03:17,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:03:17,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:03:17,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:03:17,554 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:03:17,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155897100] [2022-11-20 21:03:17,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155897100] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:03:17,554 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:03:17,554 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 21:03:17,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108779403] [2022-11-20 21:03:17,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:03:17,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 21:03:17,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:03:17,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 21:03:17,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 21:03:17,558 INFO L87 Difference]: Start difference. First operand 657 states and 838 transitions. Second operand has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-20 21:03:18,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:03:18,509 INFO L93 Difference]: Finished difference Result 1370 states and 2006 transitions. [2022-11-20 21:03:18,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 21:03:18,510 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 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 58 [2022-11-20 21:03:18,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:03:18,516 INFO L225 Difference]: With dead ends: 1370 [2022-11-20 21:03:18,516 INFO L226 Difference]: Without dead ends: 1222 [2022-11-20 21:03:18,518 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-20 21:03:18,519 INFO L413 NwaCegarLoop]: 506 mSDtfsCounter, 1173 mSDsluCounter, 670 mSDsCounter, 0 mSdLazyCounter, 559 mSolverCounterSat, 263 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1187 SdHoareTripleChecker+Valid, 1176 SdHoareTripleChecker+Invalid, 822 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 263 IncrementalHoareTripleChecker+Valid, 559 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-20 21:03:18,519 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1187 Valid, 1176 Invalid, 822 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [263 Valid, 559 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-20 21:03:18,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1222 states. [2022-11-20 21:03:18,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1222 to 1211. [2022-11-20 21:03:18,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1211 states, 940 states have (on average 1.4159574468085105) internal successors, (1331), 946 states have internal predecessors, (1331), 172 states have call successors, (172), 98 states have call predecessors, (172), 97 states have return successors, (221), 168 states have call predecessors, (221), 171 states have call successors, (221) [2022-11-20 21:03:18,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1211 states to 1211 states and 1724 transitions. [2022-11-20 21:03:18,666 INFO L78 Accepts]: Start accepts. Automaton has 1211 states and 1724 transitions. Word has length 58 [2022-11-20 21:03:18,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:03:18,666 INFO L495 AbstractCegarLoop]: Abstraction has 1211 states and 1724 transitions. [2022-11-20 21:03:18,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-20 21:03:18,666 INFO L276 IsEmpty]: Start isEmpty. Operand 1211 states and 1724 transitions. [2022-11-20 21:03:18,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-20 21:03:18,668 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:03:18,668 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:03:18,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-20 21:03:18,668 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:03:18,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:03:18,669 INFO L85 PathProgramCache]: Analyzing trace with hash 962895061, now seen corresponding path program 1 times [2022-11-20 21:03:18,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:03:18,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971289757] [2022-11-20 21:03:18,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:03:18,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:03:18,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:03:18,851 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-20 21:03:18,852 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:03:18,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971289757] [2022-11-20 21:03:18,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971289757] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:03:18,852 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:03:18,852 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-20 21:03:18,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399097591] [2022-11-20 21:03:18,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:03:18,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 21:03:18,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:03:18,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 21:03:18,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-20 21:03:18,855 INFO L87 Difference]: Start difference. First operand 1211 states and 1724 transitions. Second operand has 8 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-20 21:03:19,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:03:19,720 INFO L93 Difference]: Finished difference Result 1891 states and 2541 transitions. [2022-11-20 21:03:19,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-20 21:03:19,720 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 63 [2022-11-20 21:03:19,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:03:19,729 INFO L225 Difference]: With dead ends: 1891 [2022-11-20 21:03:19,729 INFO L226 Difference]: Without dead ends: 1474 [2022-11-20 21:03:19,731 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2022-11-20 21:03:19,735 INFO L413 NwaCegarLoop]: 173 mSDtfsCounter, 458 mSDsluCounter, 749 mSDsCounter, 0 mSdLazyCounter, 927 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 486 SdHoareTripleChecker+Valid, 922 SdHoareTripleChecker+Invalid, 1032 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 927 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 21:03:19,736 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [486 Valid, 922 Invalid, 1032 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 927 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-20 21:03:19,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1474 states. [2022-11-20 21:03:19,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1474 to 1439. [2022-11-20 21:03:19,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1439 states, 1093 states have (on average 1.385178408051235) internal successors, (1514), 1099 states have internal predecessors, (1514), 212 states have call successors, (212), 133 states have call predecessors, (212), 132 states have return successors, (261), 208 states have call predecessors, (261), 211 states have call successors, (261) [2022-11-20 21:03:19,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1439 states to 1439 states and 1987 transitions. [2022-11-20 21:03:19,921 INFO L78 Accepts]: Start accepts. Automaton has 1439 states and 1987 transitions. Word has length 63 [2022-11-20 21:03:19,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:03:19,922 INFO L495 AbstractCegarLoop]: Abstraction has 1439 states and 1987 transitions. [2022-11-20 21:03:19,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-20 21:03:19,923 INFO L276 IsEmpty]: Start isEmpty. Operand 1439 states and 1987 transitions. [2022-11-20 21:03:19,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-11-20 21:03:19,925 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:03:19,925 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-20 21:03:19,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-20 21:03:19,925 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:03:19,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:03:19,926 INFO L85 PathProgramCache]: Analyzing trace with hash -151425715, now seen corresponding path program 1 times [2022-11-20 21:03:19,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:03:19,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822866401] [2022-11-20 21:03:19,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:03:19,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:03:19,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:03:20,068 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-20 21:03:20,068 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:03:20,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822866401] [2022-11-20 21:03:20,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822866401] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:03:20,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119898682] [2022-11-20 21:03:20,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:03:20,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:03:20,070 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cad1fe2-f6eb-4ec8-a59a-19b5e2016a28/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:03:20,072 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cad1fe2-f6eb-4ec8-a59a-19b5e2016a28/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:03:20,091 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cad1fe2-f6eb-4ec8-a59a-19b5e2016a28/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 21:03:20,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:03:20,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 376 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-20 21:03:20,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:03:20,458 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 21:03:20,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:03:20,621 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-20 21:03:20,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2119898682] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:03:20,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [924303631] [2022-11-20 21:03:20,624 INFO L159 IcfgInterpreter]: Started Sifa with 54 locations of interest [2022-11-20 21:03:20,624 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 21:03:20,624 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 21:03:20,625 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 21:03:20,625 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 21:03:34,051 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 175 for LOIs [2022-11-20 21:03:34,085 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 141 for LOIs [2022-11-20 21:03:34,096 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 264 for LOIs [2022-11-20 21:03:34,314 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 179 for LOIs [2022-11-20 21:03:34,932 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 175 for LOIs [2022-11-20 21:03:34,987 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 175 for LOIs [2022-11-20 21:03:35,042 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 175 for LOIs [2022-11-20 21:03:35,063 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 182 for LOIs [2022-11-20 21:03:35,083 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 21:04:13,669 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '22818#(and (= ~q_req_up~0 1) (= ~T6_E~0 2) (= ~t6_i~0 0) (= ~t5_i~0 0) (= 0 ~t5_pc~0) (= ~E_4~0 2) (= ~t7_i~0 0) (= ~t1_pc~0 0) (= 0 ~t8_pc~0) (= 0 ~t7_pc~0) (= ~T4_E~0 2) (= ~E_7~0 2) (= ~E_8~0 2) (= 0 ~t4_st~0) (= ~T1_E~0 2) (= ~T5_E~0 2) (<= 0 ~p_dw_pc~0) (= ~m_st~0 0) (= ~E_5~0 2) (= ~q_free~0 1) (<= 0 ~p_num_write~0) (= ~T2_E~0 2) (= 1 ~c_dr_i~0) (= ~T9_E~0 2) (= 0 ~t6_pc~0) (= 0 ~t5_st~0) (= ~E_3~0 2) (= 0 ~t3_pc~0) (= 0 ~t6_st~0) (= ~t9_i~0 0) (= ~t2_i~0 0) (= 0 ~t8_st~0) (= ~E_6~0 2) (= ~t4_i~0 0) (= ~t1_st~0 0) (= ~c_num_read~0 1) (= ~T7_E~0 2) (= ~m_i~0 0) (= 0 ~t9_pc~0) (not (= ~c_num_read~0 ~p_num_write~0)) (= ~E_2~0 2) (= ~c_last_read~0 ~q_buf_0~0) (= ~T3_E~0 2) (= ~local~0 0) (= ~t3_i~0 0) (= 0 ~t7_st~0) (= ~t8_i~0 0) (= ~token~0 0) (= ~c_dr_pc~0 0) (= ~m_pc~0 0) (= 0 ~t9_st~0) (= ~p_dw_i~0 1) (= 0 ~t2_pc~0) (= |#NULL.offset| 0) (= ~c_last_read~0 ~p_last_write~0) (= ~E_M~0 2) (= ~a_t~0 0) (= 0 ~t2_st~0) (= 0 ~t4_pc~0) (= ~E_1~0 2) (= 0 ~t3_st~0) (= ~T8_E~0 2) (= ~M_E~0 2) (<= 0 |#StackHeapBarrier|) (= ~E_9~0 2) (= ~c_dr_st~0 1) (= ~t1_i~0 0) (= |#NULL.base| 0))' at error location [2022-11-20 21:04:13,669 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 21:04:13,670 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 21:04:13,670 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 7 [2022-11-20 21:04:13,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472522550] [2022-11-20 21:04:13,670 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 21:04:13,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 21:04:13,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:04:13,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 21:04:13,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=1924, Unknown=0, NotChecked=0, Total=2162 [2022-11-20 21:04:13,672 INFO L87 Difference]: Start difference. First operand 1439 states and 1987 transitions. Second operand has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 6 states have call successors, (23), 4 states have call predecessors, (23), 3 states have return successors, (22), 5 states have call predecessors, (22), 5 states have call successors, (22) [2022-11-20 21:04:14,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:04:14,458 INFO L93 Difference]: Finished difference Result 2984 states and 3854 transitions. [2022-11-20 21:04:14,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 21:04:14,458 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 6 states have call successors, (23), 4 states have call predecessors, (23), 3 states have return successors, (22), 5 states have call predecessors, (22), 5 states have call successors, (22) Word has length 64 [2022-11-20 21:04:14,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:04:14,473 INFO L225 Difference]: With dead ends: 2984 [2022-11-20 21:04:14,473 INFO L226 Difference]: Without dead ends: 2981 [2022-11-20 21:04:14,475 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 146 SyntacticMatches, 4 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 958 ImplicationChecksByTransitivity, 38.6s TimeCoverageRelationStatistics Valid=238, Invalid=1924, Unknown=0, NotChecked=0, Total=2162 [2022-11-20 21:04:14,476 INFO L413 NwaCegarLoop]: 397 mSDtfsCounter, 810 mSDsluCounter, 575 mSDsCounter, 0 mSdLazyCounter, 484 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 810 SdHoareTripleChecker+Valid, 972 SdHoareTripleChecker+Invalid, 582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 484 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 21:04:14,477 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [810 Valid, 972 Invalid, 582 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 484 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 21:04:14,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2981 states. [2022-11-20 21:04:14,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2981 to 2179. [2022-11-20 21:04:14,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2179 states, 1611 states have (on average 1.3482309124767224) internal successors, (2172), 1617 states have internal predecessors, (2172), 330 states have call successors, (330), 237 states have call predecessors, (330), 236 states have return successors, (379), 326 states have call predecessors, (379), 329 states have call successors, (379) [2022-11-20 21:04:14,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2179 states to 2179 states and 2881 transitions. [2022-11-20 21:04:14,781 INFO L78 Accepts]: Start accepts. Automaton has 2179 states and 2881 transitions. Word has length 64 [2022-11-20 21:04:14,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:04:14,781 INFO L495 AbstractCegarLoop]: Abstraction has 2179 states and 2881 transitions. [2022-11-20 21:04:14,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 6 states have call successors, (23), 4 states have call predecessors, (23), 3 states have return successors, (22), 5 states have call predecessors, (22), 5 states have call successors, (22) [2022-11-20 21:04:14,782 INFO L276 IsEmpty]: Start isEmpty. Operand 2179 states and 2881 transitions. [2022-11-20 21:04:14,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-20 21:04:14,788 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:04:14,789 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-20 21:04:14,799 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cad1fe2-f6eb-4ec8-a59a-19b5e2016a28/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-20 21:04:14,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cad1fe2-f6eb-4ec8-a59a-19b5e2016a28/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-20 21:04:14,995 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:04:14,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:04:14,995 INFO L85 PathProgramCache]: Analyzing trace with hash -50418723, now seen corresponding path program 2 times [2022-11-20 21:04:14,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:04:14,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387375946] [2022-11-20 21:04:14,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:04:14,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:04:15,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:04:15,039 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-20 21:04:15,039 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:04:15,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387375946] [2022-11-20 21:04:15,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387375946] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:04:15,039 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:04:15,040 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 21:04:15,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476388748] [2022-11-20 21:04:15,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:04:15,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 21:04:15,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:04:15,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 21:04:15,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:04:15,042 INFO L87 Difference]: Start difference. First operand 2179 states and 2881 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-20 21:04:15,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:04:15,374 INFO L93 Difference]: Finished difference Result 2947 states and 3813 transitions. [2022-11-20 21:04:15,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 21:04:15,375 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 67 [2022-11-20 21:04:15,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:04:15,384 INFO L225 Difference]: With dead ends: 2947 [2022-11-20 21:04:15,384 INFO L226 Difference]: Without dead ends: 1757 [2022-11-20 21:04:15,387 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:04:15,387 INFO L413 NwaCegarLoop]: 315 mSDtfsCounter, 299 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 299 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 21:04:15,388 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [299 Valid, 383 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 21:04:15,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1757 states. [2022-11-20 21:04:15,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1757 to 1747. [2022-11-20 21:04:15,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1747 states, 1307 states have (on average 1.3573068094873757) internal successors, (1774), 1313 states have internal predecessors, (1774), 262 states have call successors, (262), 177 states have call predecessors, (262), 176 states have return successors, (311), 258 states have call predecessors, (311), 261 states have call successors, (311) [2022-11-20 21:04:15,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1747 states to 1747 states and 2347 transitions. [2022-11-20 21:04:15,641 INFO L78 Accepts]: Start accepts. Automaton has 1747 states and 2347 transitions. Word has length 67 [2022-11-20 21:04:15,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:04:15,642 INFO L495 AbstractCegarLoop]: Abstraction has 1747 states and 2347 transitions. [2022-11-20 21:04:15,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-20 21:04:15,642 INFO L276 IsEmpty]: Start isEmpty. Operand 1747 states and 2347 transitions. [2022-11-20 21:04:15,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-20 21:04:15,644 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:04:15,644 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-20 21:04:15,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-20 21:04:15,645 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:04:15,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:04:15,645 INFO L85 PathProgramCache]: Analyzing trace with hash -1848820709, now seen corresponding path program 1 times [2022-11-20 21:04:15,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:04:15,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209515637] [2022-11-20 21:04:15,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:04:15,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:04:15,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:04:15,697 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-20 21:04:15,698 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:04:15,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209515637] [2022-11-20 21:04:15,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209515637] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:04:15,698 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:04:15,698 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 21:04:15,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481504744] [2022-11-20 21:04:15,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:04:15,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 21:04:15,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:04:15,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 21:04:15,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:04:15,700 INFO L87 Difference]: Start difference. First operand 1747 states and 2347 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-20 21:04:16,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:04:16,041 INFO L93 Difference]: Finished difference Result 2778 states and 3580 transitions. [2022-11-20 21:04:16,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 21:04:16,042 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 71 [2022-11-20 21:04:16,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:04:16,051 INFO L225 Difference]: With dead ends: 2778 [2022-11-20 21:04:16,051 INFO L226 Difference]: Without dead ends: 1921 [2022-11-20 21:04:16,054 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:04:16,055 INFO L413 NwaCegarLoop]: 301 mSDtfsCounter, 39 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 566 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 21:04:16,055 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 566 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 21:04:16,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1921 states. [2022-11-20 21:04:16,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1921 to 1792. [2022-11-20 21:04:16,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1792 states, 1344 states have (on average 1.3526785714285714) internal successors, (1818), 1350 states have internal predecessors, (1818), 266 states have call successors, (266), 181 states have call predecessors, (266), 180 states have return successors, (315), 262 states have call predecessors, (315), 265 states have call successors, (315) [2022-11-20 21:04:16,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1792 states to 1792 states and 2399 transitions. [2022-11-20 21:04:16,363 INFO L78 Accepts]: Start accepts. Automaton has 1792 states and 2399 transitions. Word has length 71 [2022-11-20 21:04:16,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:04:16,364 INFO L495 AbstractCegarLoop]: Abstraction has 1792 states and 2399 transitions. [2022-11-20 21:04:16,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-20 21:04:16,364 INFO L276 IsEmpty]: Start isEmpty. Operand 1792 states and 2399 transitions. [2022-11-20 21:04:16,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-11-20 21:04:16,367 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:04:16,368 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:04:16,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-20 21:04:16,368 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:04:16,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:04:16,369 INFO L85 PathProgramCache]: Analyzing trace with hash 1085703461, now seen corresponding path program 1 times [2022-11-20 21:04:16,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:04:16,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209213420] [2022-11-20 21:04:16,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:04:16,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:04:16,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:04:16,758 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-20 21:04:16,758 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:04:16,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209213420] [2022-11-20 21:04:16,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209213420] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:04:16,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366450451] [2022-11-20 21:04:16,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:04:16,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:04:16,759 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cad1fe2-f6eb-4ec8-a59a-19b5e2016a28/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:04:16,760 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cad1fe2-f6eb-4ec8-a59a-19b5e2016a28/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:04:16,787 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cad1fe2-f6eb-4ec8-a59a-19b5e2016a28/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 21:04:16,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:04:16,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-20 21:04:16,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:04:16,979 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 21:04:16,980 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:04:16,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1366450451] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:04:16,980 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 21:04:16,980 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [14] total 15 [2022-11-20 21:04:16,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648905591] [2022-11-20 21:04:16,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:04:16,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 21:04:16,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:04:16,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 21:04:16,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2022-11-20 21:04:16,982 INFO L87 Difference]: Start difference. First operand 1792 states and 2399 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, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-20 21:04:17,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:04:17,321 INFO L93 Difference]: Finished difference Result 2621 states and 3417 transitions. [2022-11-20 21:04:17,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 21:04:17,321 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, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 102 [2022-11-20 21:04:17,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:04:17,330 INFO L225 Difference]: With dead ends: 2621 [2022-11-20 21:04:17,330 INFO L226 Difference]: Without dead ends: 1821 [2022-11-20 21:04:17,333 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2022-11-20 21:04:17,333 INFO L413 NwaCegarLoop]: 319 mSDtfsCounter, 47 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 578 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 21:04:17,334 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 578 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 21:04:17,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1821 states. [2022-11-20 21:04:17,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1821 to 1788. [2022-11-20 21:04:17,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1788 states, 1340 states have (on average 1.3298507462686566) internal successors, (1782), 1346 states have internal predecessors, (1782), 266 states have call successors, (266), 181 states have call predecessors, (266), 180 states have return successors, (315), 262 states have call predecessors, (315), 265 states have call successors, (315) [2022-11-20 21:04:17,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1788 states to 1788 states and 2363 transitions. [2022-11-20 21:04:17,619 INFO L78 Accepts]: Start accepts. Automaton has 1788 states and 2363 transitions. Word has length 102 [2022-11-20 21:04:17,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:04:17,620 INFO L495 AbstractCegarLoop]: Abstraction has 1788 states and 2363 transitions. [2022-11-20 21:04:17,620 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, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-20 21:04:17,620 INFO L276 IsEmpty]: Start isEmpty. Operand 1788 states and 2363 transitions. [2022-11-20 21:04:17,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-11-20 21:04:17,622 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:04:17,623 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:04:17,633 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cad1fe2-f6eb-4ec8-a59a-19b5e2016a28/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-20 21:04:17,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cad1fe2-f6eb-4ec8-a59a-19b5e2016a28/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-20 21:04:17,828 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:04:17,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:04:17,829 INFO L85 PathProgramCache]: Analyzing trace with hash -1632706076, now seen corresponding path program 1 times [2022-11-20 21:04:17,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:04:17,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763291252] [2022-11-20 21:04:17,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:04:17,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:04:17,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:04:18,251 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-20 21:04:18,251 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:04:18,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763291252] [2022-11-20 21:04:18,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763291252] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:04:18,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423863911] [2022-11-20 21:04:18,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:04:18,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:04:18,252 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cad1fe2-f6eb-4ec8-a59a-19b5e2016a28/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:04:18,255 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cad1fe2-f6eb-4ec8-a59a-19b5e2016a28/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:04:18,279 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cad1fe2-f6eb-4ec8-a59a-19b5e2016a28/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-20 21:04:18,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:04:18,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 504 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-20 21:04:18,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:04:18,468 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 21:04:18,468 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:04:18,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1423863911] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:04:18,469 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 21:04:18,469 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [14] total 17 [2022-11-20 21:04:18,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584980539] [2022-11-20 21:04:18,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:04:18,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 21:04:18,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:04:18,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 21:04:18,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-11-20 21:04:18,471 INFO L87 Difference]: Start difference. First operand 1788 states and 2363 transitions. Second operand has 6 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-20 21:04:18,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:04:18,969 INFO L93 Difference]: Finished difference Result 2672 states and 3433 transitions. [2022-11-20 21:04:18,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 21:04:18,970 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 102 [2022-11-20 21:04:18,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:04:18,977 INFO L225 Difference]: With dead ends: 2672 [2022-11-20 21:04:18,978 INFO L226 Difference]: Without dead ends: 1619 [2022-11-20 21:04:18,980 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2022-11-20 21:04:18,981 INFO L413 NwaCegarLoop]: 314 mSDtfsCounter, 291 mSDsluCounter, 939 mSDsCounter, 0 mSdLazyCounter, 315 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 293 SdHoareTripleChecker+Valid, 1253 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 21:04:18,982 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [293 Valid, 1253 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 315 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 21:04:18,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1619 states. [2022-11-20 21:04:19,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1619 to 1422. [2022-11-20 21:04:19,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1422 states, 1106 states have (on average 1.3625678119349005) internal successors, (1507), 1112 states have internal predecessors, (1507), 195 states have call successors, (195), 120 states have call predecessors, (195), 119 states have return successors, (244), 191 states have call predecessors, (244), 194 states have call successors, (244) [2022-11-20 21:04:19,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1422 states to 1422 states and 1946 transitions. [2022-11-20 21:04:19,237 INFO L78 Accepts]: Start accepts. Automaton has 1422 states and 1946 transitions. Word has length 102 [2022-11-20 21:04:19,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:04:19,237 INFO L495 AbstractCegarLoop]: Abstraction has 1422 states and 1946 transitions. [2022-11-20 21:04:19,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-20 21:04:19,238 INFO L276 IsEmpty]: Start isEmpty. Operand 1422 states and 1946 transitions. [2022-11-20 21:04:19,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-11-20 21:04:19,241 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:04:19,242 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:04:19,253 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cad1fe2-f6eb-4ec8-a59a-19b5e2016a28/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-20 21:04:19,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cad1fe2-f6eb-4ec8-a59a-19b5e2016a28/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:04:19,442 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:04:19,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:04:19,443 INFO L85 PathProgramCache]: Analyzing trace with hash 32165632, now seen corresponding path program 1 times [2022-11-20 21:04:19,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:04:19,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972193172] [2022-11-20 21:04:19,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:04:19,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:04:19,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:04:19,514 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-11-20 21:04:19,514 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:04:19,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972193172] [2022-11-20 21:04:19,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972193172] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:04:19,515 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:04:19,515 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 21:04:19,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191622754] [2022-11-20 21:04:19,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:04:19,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 21:04:19,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:04:19,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 21:04:19,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 21:04:19,517 INFO L87 Difference]: Start difference. First operand 1422 states and 1946 transitions. Second operand has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2022-11-20 21:04:19,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:04:19,952 INFO L93 Difference]: Finished difference Result 2041 states and 2688 transitions. [2022-11-20 21:04:19,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 21:04:19,953 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 112 [2022-11-20 21:04:19,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:04:19,959 INFO L225 Difference]: With dead ends: 2041 [2022-11-20 21:04:19,960 INFO L226 Difference]: Without dead ends: 1421 [2022-11-20 21:04:19,963 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 21:04:19,964 INFO L413 NwaCegarLoop]: 306 mSDtfsCounter, 351 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 351 SdHoareTripleChecker+Valid, 523 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 21:04:19,964 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [351 Valid, 523 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 21:04:19,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1421 states. [2022-11-20 21:04:20,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1421 to 1412. [2022-11-20 21:04:20,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1412 states, 1096 states have (on average 1.342153284671533) internal successors, (1471), 1102 states have internal predecessors, (1471), 195 states have call successors, (195), 120 states have call predecessors, (195), 119 states have return successors, (244), 191 states have call predecessors, (244), 194 states have call successors, (244) [2022-11-20 21:04:20,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1412 states to 1412 states and 1910 transitions. [2022-11-20 21:04:20,180 INFO L78 Accepts]: Start accepts. Automaton has 1412 states and 1910 transitions. Word has length 112 [2022-11-20 21:04:20,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:04:20,181 INFO L495 AbstractCegarLoop]: Abstraction has 1412 states and 1910 transitions. [2022-11-20 21:04:20,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2022-11-20 21:04:20,181 INFO L276 IsEmpty]: Start isEmpty. Operand 1412 states and 1910 transitions. [2022-11-20 21:04:20,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-11-20 21:04:20,184 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:04:20,184 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:04:20,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-20 21:04:20,184 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:04:20,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:04:20,185 INFO L85 PathProgramCache]: Analyzing trace with hash 1925607807, now seen corresponding path program 1 times [2022-11-20 21:04:20,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:04:20,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223000477] [2022-11-20 21:04:20,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:04:20,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:04:20,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:04:20,387 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 25 proven. 8 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-20 21:04:20,388 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:04:20,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223000477] [2022-11-20 21:04:20,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223000477] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:04:20,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155976655] [2022-11-20 21:04:20,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:04:20,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:04:20,389 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cad1fe2-f6eb-4ec8-a59a-19b5e2016a28/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:04:20,395 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cad1fe2-f6eb-4ec8-a59a-19b5e2016a28/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:04:20,445 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cad1fe2-f6eb-4ec8-a59a-19b5e2016a28/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-20 21:04:20,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:04:20,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 539 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-20 21:04:20,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:04:20,654 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-20 21:04:20,654 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:04:20,657 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155976655] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:04:20,657 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 21:04:20,657 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 13 [2022-11-20 21:04:20,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795238811] [2022-11-20 21:04:20,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:04:20,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 21:04:20,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:04:20,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 21:04:20,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-11-20 21:04:20,661 INFO L87 Difference]: Start difference. First operand 1412 states and 1910 transitions. Second operand has 7 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-20 21:04:21,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:04:21,157 INFO L93 Difference]: Finished difference Result 1961 states and 2535 transitions. [2022-11-20 21:04:21,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 21:04:21,158 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 112 [2022-11-20 21:04:21,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:04:21,165 INFO L225 Difference]: With dead ends: 1961 [2022-11-20 21:04:21,165 INFO L226 Difference]: Without dead ends: 1368 [2022-11-20 21:04:21,167 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2022-11-20 21:04:21,168 INFO L413 NwaCegarLoop]: 311 mSDtfsCounter, 67 mSDsluCounter, 1436 mSDsCounter, 0 mSdLazyCounter, 431 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 1747 SdHoareTripleChecker+Invalid, 435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 21:04:21,168 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 1747 Invalid, 435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 431 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 21:04:21,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1368 states. [2022-11-20 21:04:21,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1368 to 1276. [2022-11-20 21:04:21,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1276 states, 996 states have (on average 1.359437751004016) internal successors, (1354), 1002 states have internal predecessors, (1354), 176 states have call successors, (176), 103 states have call predecessors, (176), 102 states have return successors, (225), 172 states have call predecessors, (225), 175 states have call successors, (225) [2022-11-20 21:04:21,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1276 states to 1276 states and 1755 transitions. [2022-11-20 21:04:21,364 INFO L78 Accepts]: Start accepts. Automaton has 1276 states and 1755 transitions. Word has length 112 [2022-11-20 21:04:21,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:04:21,364 INFO L495 AbstractCegarLoop]: Abstraction has 1276 states and 1755 transitions. [2022-11-20 21:04:21,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-11-20 21:04:21,365 INFO L276 IsEmpty]: Start isEmpty. Operand 1276 states and 1755 transitions. [2022-11-20 21:04:21,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-11-20 21:04:21,367 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:04:21,367 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:04:21,378 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cad1fe2-f6eb-4ec8-a59a-19b5e2016a28/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-20 21:04:21,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cad1fe2-f6eb-4ec8-a59a-19b5e2016a28/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-20 21:04:21,574 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:04:21,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:04:21,574 INFO L85 PathProgramCache]: Analyzing trace with hash 1757665269, now seen corresponding path program 1 times [2022-11-20 21:04:21,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:04:21,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334936825] [2022-11-20 21:04:21,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:04:21,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:04:21,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:04:21,736 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-20 21:04:21,736 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:04:21,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334936825] [2022-11-20 21:04:21,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334936825] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:04:21,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194366440] [2022-11-20 21:04:21,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:04:21,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:04:21,737 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cad1fe2-f6eb-4ec8-a59a-19b5e2016a28/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:04:21,738 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cad1fe2-f6eb-4ec8-a59a-19b5e2016a28/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:04:21,751 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cad1fe2-f6eb-4ec8-a59a-19b5e2016a28/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-20 21:04:21,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:04:21,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 541 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 21:04:21,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:04:21,982 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-20 21:04:21,982 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:04:21,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194366440] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:04:21,983 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 21:04:21,983 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 11 [2022-11-20 21:04:21,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025122890] [2022-11-20 21:04:21,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:04:21,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 21:04:21,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:04:21,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 21:04:21,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-11-20 21:04:21,985 INFO L87 Difference]: Start difference. First operand 1276 states and 1755 transitions. Second operand has 6 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-20 21:04:22,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:04:22,413 INFO L93 Difference]: Finished difference Result 2025 states and 2600 transitions. [2022-11-20 21:04:22,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 21:04:22,414 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) Word has length 113 [2022-11-20 21:04:22,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:04:22,422 INFO L225 Difference]: With dead ends: 2025 [2022-11-20 21:04:22,422 INFO L226 Difference]: Without dead ends: 1568 [2022-11-20 21:04:22,423 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-11-20 21:04:22,424 INFO L413 NwaCegarLoop]: 303 mSDtfsCounter, 275 mSDsluCounter, 967 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 276 SdHoareTripleChecker+Valid, 1270 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 21:04:22,424 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [276 Valid, 1270 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 21:04:22,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1568 states. [2022-11-20 21:04:22,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1568 to 1534. [2022-11-20 21:04:22,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1534 states, 1158 states have (on average 1.3246977547495682) internal successors, (1534), 1170 states have internal predecessors, (1534), 224 states have call successors, (224), 145 states have call predecessors, (224), 150 states have return successors, (285), 220 states have call predecessors, (285), 223 states have call successors, (285) [2022-11-20 21:04:22,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1534 states to 1534 states and 2043 transitions. [2022-11-20 21:04:22,705 INFO L78 Accepts]: Start accepts. Automaton has 1534 states and 2043 transitions. Word has length 113 [2022-11-20 21:04:22,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:04:22,706 INFO L495 AbstractCegarLoop]: Abstraction has 1534 states and 2043 transitions. [2022-11-20 21:04:22,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2022-11-20 21:04:22,707 INFO L276 IsEmpty]: Start isEmpty. Operand 1534 states and 2043 transitions. [2022-11-20 21:04:22,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-11-20 21:04:22,710 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:04:22,710 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:04:22,723 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cad1fe2-f6eb-4ec8-a59a-19b5e2016a28/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-20 21:04:22,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cad1fe2-f6eb-4ec8-a59a-19b5e2016a28/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-20 21:04:22,917 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:04:22,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:04:22,918 INFO L85 PathProgramCache]: Analyzing trace with hash -1300964379, now seen corresponding path program 1 times [2022-11-20 21:04:22,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:04:22,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543817493] [2022-11-20 21:04:22,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:04:22,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:04:22,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:04:23,188 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-20 21:04:23,188 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:04:23,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543817493] [2022-11-20 21:04:23,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543817493] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:04:23,189 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:04:23,189 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-20 21:04:23,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149487856] [2022-11-20 21:04:23,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:04:23,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-20 21:04:23,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:04:23,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-20 21:04:23,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-11-20 21:04:23,192 INFO L87 Difference]: Start difference. First operand 1534 states and 2043 transitions. Second operand has 10 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 6 states have call successors, (16), 4 states have call predecessors, (16), 4 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2022-11-20 21:04:24,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:04:24,266 INFO L93 Difference]: Finished difference Result 2213 states and 2806 transitions. [2022-11-20 21:04:24,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-20 21:04:24,267 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 6 states have call successors, (16), 4 states have call predecessors, (16), 4 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) Word has length 114 [2022-11-20 21:04:24,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:04:24,273 INFO L225 Difference]: With dead ends: 2213 [2022-11-20 21:04:24,274 INFO L226 Difference]: Without dead ends: 1498 [2022-11-20 21:04:24,276 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2022-11-20 21:04:24,277 INFO L413 NwaCegarLoop]: 208 mSDtfsCounter, 864 mSDsluCounter, 859 mSDsCounter, 0 mSdLazyCounter, 1140 mSolverCounterSat, 217 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 889 SdHoareTripleChecker+Valid, 1067 SdHoareTripleChecker+Invalid, 1357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 217 IncrementalHoareTripleChecker+Valid, 1140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-20 21:04:24,277 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [889 Valid, 1067 Invalid, 1357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [217 Valid, 1140 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-20 21:04:24,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1498 states. [2022-11-20 21:04:24,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1498 to 1478. [2022-11-20 21:04:24,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1478 states, 1122 states have (on average 1.3279857397504455) internal successors, (1490), 1138 states have internal predecessors, (1490), 209 states have call successors, (209), 133 states have call predecessors, (209), 145 states have return successors, (276), 208 states have call predecessors, (276), 208 states have call successors, (276) [2022-11-20 21:04:24,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1478 states to 1478 states and 1975 transitions. [2022-11-20 21:04:24,551 INFO L78 Accepts]: Start accepts. Automaton has 1478 states and 1975 transitions. Word has length 114 [2022-11-20 21:04:24,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:04:24,551 INFO L495 AbstractCegarLoop]: Abstraction has 1478 states and 1975 transitions. [2022-11-20 21:04:24,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 6 states have call successors, (16), 4 states have call predecessors, (16), 4 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2022-11-20 21:04:24,552 INFO L276 IsEmpty]: Start isEmpty. Operand 1478 states and 1975 transitions. [2022-11-20 21:04:24,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-11-20 21:04:24,554 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:04:24,555 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:04:24,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-20 21:04:24,555 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:04:24,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:04:24,556 INFO L85 PathProgramCache]: Analyzing trace with hash -1443091220, now seen corresponding path program 1 times [2022-11-20 21:04:24,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:04:24,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756076756] [2022-11-20 21:04:24,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:04:24,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:04:24,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:04:25,378 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 22 proven. 15 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-20 21:04:25,378 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:04:25,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756076756] [2022-11-20 21:04:25,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756076756] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:04:25,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708703280] [2022-11-20 21:04:25,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:04:25,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:04:25,379 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cad1fe2-f6eb-4ec8-a59a-19b5e2016a28/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:04:25,380 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cad1fe2-f6eb-4ec8-a59a-19b5e2016a28/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:04:25,399 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cad1fe2-f6eb-4ec8-a59a-19b5e2016a28/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-20 21:04:25,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:04:25,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 548 conjuncts, 59 conjunts are in the unsatisfiable core [2022-11-20 21:04:25,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:04:26,530 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 31 proven. 24 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 21:04:26,530 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:04:28,398 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 22 proven. 13 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-20 21:04:28,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708703280] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:04:28,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [638794400] [2022-11-20 21:04:28,402 INFO L159 IcfgInterpreter]: Started Sifa with 68 locations of interest [2022-11-20 21:04:28,402 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 21:04:28,403 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 21:04:28,403 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 21:04:28,403 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 21:05:17,886 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 312 for LOIs [2022-11-20 21:05:18,519 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 263 for LOIs [2022-11-20 21:05:18,604 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 254 for LOIs [2022-11-20 21:05:18,693 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 324 for LOIs [2022-11-20 21:05:21,506 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 182 for LOIs [2022-11-20 21:05:21,850 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 128 for LOIs [2022-11-20 21:05:22,245 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 316 for LOIs [2022-11-20 21:05:22,952 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 339 for LOIs [2022-11-20 21:05:23,528 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 21:06:30,640 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '78195#(and (= ~q_req_up~0 1) (= ~T6_E~0 2) (= ~t6_i~0 0) (= 0 ~t5_pc~0) (= ~t7_i~0 0) (= 0 ~t8_pc~0) (= ~T4_E~0 2) (<= 0 ~c_dr_pc~0) (<= 0 ~p_dw_st~0) (= 0 ~t4_st~0) (= ~T1_E~0 2) (= ~T5_E~0 2) (<= 0 ~p_dw_pc~0) (= ~q_free~0 1) (<= 0 ~p_num_write~0) (= ~T2_E~0 2) (<= ~c_dr_pc~0 1) (= 1 ~c_dr_i~0) (<= ~p_dw_st~0 2) (= 0 ~t6_pc~0) (= 0 ~t5_st~0) (<= 0 ~t7_st~0) (<= ~T7_E~0 2) (= ~E_3~0 2) (<= ~t7_pc~0 0) (= 0 ~t6_st~0) (<= ~t1_pc~0 0) (<= ~t8_i~0 0) (<= 2 ~M_E~0) (<= ~T9_E~0 2) (= ~t9_i~0 0) (<= |#NULL.offset| 0) (= ~t4_i~0 0) (<= 0 ~t9_st~0) (<= ~t5_i~0 0) (<= 2 ~T8_E~0) (<= 1 ~c_dr_st~0) (<= 2 ~E_9~0) (<= 2 ~E_6~0) (= ~m_i~0 0) (<= ~t2_i~0 0) (<= 2 ~E_8~0) (<= ~t8_st~0 0) (not (= ~c_num_read~0 ~p_num_write~0)) (<= ~E_4~0 2) (<= 2 ~E_7~0) (<= ~t9_pc~0 0) (<= 0 ~t5_i~0) (<= 0 ~t8_st~0) (<= ~t9_st~0 0) (= ~E_2~0 2) (<= ~T8_E~0 2) (<= ~E_6~0 2) (<= 0 ~t2_i~0) (<= ~t3_st~0 0) (= ~T3_E~0 2) (= ~local~0 0) (= ~t3_i~0 0) (= ~token~0 0) (<= 0 ~t3_st~0) (<= ~m_pc~0 0) (<= 2 ~E_4~0) (= ~p_dw_i~0 1) (<= 2 ~T7_E~0) (= 0 ~t2_pc~0) (<= ~M_E~0 2) (<= ~E_5~0 2) (<= ~m_st~0 0) (<= ~t3_pc~0 0) (= ~c_last_read~0 ~p_last_write~0) (<= 0 ~m_pc~0) (<= ~c_dr_st~0 1) (<= 2 ~T9_E~0) (= ~E_M~0 2) (<= 0 ~t3_pc~0) (<= 0 ~t7_pc~0) (<= ~t7_st~0 0) (= 0 ~t2_st~0) (<= ~E_8~0 2) (<= 0 ~t9_pc~0) (<= 2 ~E_5~0) (<= 0 ~t8_i~0) (<= 1 ~c_num_read~0) (<= 0 ~m_st~0) (<= 0 |#NULL.offset|) (<= ~t4_pc~0 0) (= ~E_1~0 2) (<= 0 ~t4_pc~0) (<= ~t1_st~0 0) (<= 0 |#StackHeapBarrier|) (<= 0 ~t1_st~0) (<= ~E_7~0 2) (<= ~E_9~0 2) (<= 0 ~t1_pc~0) (= ~t1_i~0 0) (= |#NULL.base| 0))' at error location [2022-11-20 21:06:30,640 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 21:06:30,640 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 21:06:30,640 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17, 16] total 49 [2022-11-20 21:06:30,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673175721] [2022-11-20 21:06:30,640 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 21:06:30,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-11-20 21:06:30,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:06:30,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-11-20 21:06:30,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=768, Invalid=10362, Unknown=0, NotChecked=0, Total=11130 [2022-11-20 21:06:30,645 INFO L87 Difference]: Start difference. First operand 1478 states and 1975 transitions. Second operand has 49 states, 32 states have (on average 6.09375) internal successors, (195), 37 states have internal predecessors, (195), 17 states have call successors, (44), 14 states have call predecessors, (44), 22 states have return successors, (46), 17 states have call predecessors, (46), 17 states have call successors, (46) [2022-11-20 21:06:52,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:06:52,226 INFO L93 Difference]: Finished difference Result 3139 states and 3873 transitions. [2022-11-20 21:06:52,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 214 states. [2022-11-20 21:06:52,227 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 32 states have (on average 6.09375) internal successors, (195), 37 states have internal predecessors, (195), 17 states have call successors, (44), 14 states have call predecessors, (44), 22 states have return successors, (46), 17 states have call predecessors, (46), 17 states have call successors, (46) Word has length 114 [2022-11-20 21:06:52,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:06:52,237 INFO L225 Difference]: With dead ends: 3139 [2022-11-20 21:06:52,237 INFO L226 Difference]: Without dead ends: 2480 [2022-11-20 21:06:52,255 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 603 GetRequests, 289 SyntacticMatches, 4 SemanticMatches, 310 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39899 ImplicationChecksByTransitivity, 83.6s TimeCoverageRelationStatistics Valid=8938, Invalid=88094, Unknown=0, NotChecked=0, Total=97032 [2022-11-20 21:06:52,256 INFO L413 NwaCegarLoop]: 226 mSDtfsCounter, 5110 mSDsluCounter, 2985 mSDsCounter, 0 mSdLazyCounter, 7446 mSolverCounterSat, 2425 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5112 SdHoareTripleChecker+Valid, 3211 SdHoareTripleChecker+Invalid, 9871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2425 IncrementalHoareTripleChecker+Valid, 7446 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2022-11-20 21:06:52,257 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5112 Valid, 3211 Invalid, 9871 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2425 Valid, 7446 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2022-11-20 21:06:52,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2480 states. [2022-11-20 21:06:52,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2480 to 1650. [2022-11-20 21:06:52,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1650 states, 1238 states have (on average 1.3109854604200324) internal successors, (1623), 1256 states have internal predecessors, (1623), 235 states have call successors, (235), 154 states have call predecessors, (235), 175 states have return successors, (312), 241 states have call predecessors, (312), 234 states have call successors, (312) [2022-11-20 21:06:52,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1650 states to 1650 states and 2170 transitions. [2022-11-20 21:06:52,621 INFO L78 Accepts]: Start accepts. Automaton has 1650 states and 2170 transitions. Word has length 114 [2022-11-20 21:06:52,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:06:52,621 INFO L495 AbstractCegarLoop]: Abstraction has 1650 states and 2170 transitions. [2022-11-20 21:06:52,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 32 states have (on average 6.09375) internal successors, (195), 37 states have internal predecessors, (195), 17 states have call successors, (44), 14 states have call predecessors, (44), 22 states have return successors, (46), 17 states have call predecessors, (46), 17 states have call successors, (46) [2022-11-20 21:06:52,622 INFO L276 IsEmpty]: Start isEmpty. Operand 1650 states and 2170 transitions. [2022-11-20 21:06:52,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-11-20 21:06:52,625 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:06:52,625 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:06:52,634 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cad1fe2-f6eb-4ec8-a59a-19b5e2016a28/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-20 21:06:52,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cad1fe2-f6eb-4ec8-a59a-19b5e2016a28/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:06:52,831 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:06:52,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:06:52,832 INFO L85 PathProgramCache]: Analyzing trace with hash 1030973152, now seen corresponding path program 1 times [2022-11-20 21:06:52,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:06:52,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176153719] [2022-11-20 21:06:52,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:06:52,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:06:52,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:06:53,185 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 23 proven. 11 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-20 21:06:53,185 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:06:53,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176153719] [2022-11-20 21:06:53,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176153719] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:06:53,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101758940] [2022-11-20 21:06:53,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:06:53,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:06:53,186 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cad1fe2-f6eb-4ec8-a59a-19b5e2016a28/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:06:53,187 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cad1fe2-f6eb-4ec8-a59a-19b5e2016a28/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:06:53,207 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cad1fe2-f6eb-4ec8-a59a-19b5e2016a28/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-20 21:06:53,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:06:53,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 547 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-20 21:06:53,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:06:53,444 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 35 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-20 21:06:53,444 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:06:53,688 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-20 21:06:53,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1101758940] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-20 21:06:53,688 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-20 21:06:53,688 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [14, 8] total 20 [2022-11-20 21:06:53,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434874761] [2022-11-20 21:06:53,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:06:53,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 21:06:53,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:06:53,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 21:06:53,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2022-11-20 21:06:53,690 INFO L87 Difference]: Start difference. First operand 1650 states and 2170 transitions. Second operand has 7 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-20 21:06:54,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:06:54,731 INFO L93 Difference]: Finished difference Result 2883 states and 3598 transitions. [2022-11-20 21:06:54,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-20 21:06:54,732 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) Word has length 115 [2022-11-20 21:06:54,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:06:54,742 INFO L225 Difference]: With dead ends: 2883 [2022-11-20 21:06:54,742 INFO L226 Difference]: Without dead ends: 2052 [2022-11-20 21:06:54,745 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2022-11-20 21:06:54,746 INFO L413 NwaCegarLoop]: 239 mSDtfsCounter, 459 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 820 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 463 SdHoareTripleChecker+Valid, 546 SdHoareTripleChecker+Invalid, 924 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 820 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 21:06:54,746 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [463 Valid, 546 Invalid, 924 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 820 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-20 21:06:54,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2052 states. [2022-11-20 21:06:55,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2052 to 1800. [2022-11-20 21:06:55,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1800 states, 1328 states have (on average 1.2981927710843373) internal successors, (1724), 1352 states have internal predecessors, (1724), 264 states have call successors, (264), 173 states have call predecessors, (264), 206 states have return successors, (371), 276 states have call predecessors, (371), 263 states have call successors, (371) [2022-11-20 21:06:55,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1800 states to 1800 states and 2359 transitions. [2022-11-20 21:06:55,068 INFO L78 Accepts]: Start accepts. Automaton has 1800 states and 2359 transitions. Word has length 115 [2022-11-20 21:06:55,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:06:55,068 INFO L495 AbstractCegarLoop]: Abstraction has 1800 states and 2359 transitions. [2022-11-20 21:06:55,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-20 21:06:55,069 INFO L276 IsEmpty]: Start isEmpty. Operand 1800 states and 2359 transitions. [2022-11-20 21:06:55,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-20 21:06:55,073 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:06:55,073 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:06:55,086 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cad1fe2-f6eb-4ec8-a59a-19b5e2016a28/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-20 21:06:55,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cad1fe2-f6eb-4ec8-a59a-19b5e2016a28/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:06:55,279 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:06:55,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:06:55,280 INFO L85 PathProgramCache]: Analyzing trace with hash 113144421, now seen corresponding path program 1 times [2022-11-20 21:06:55,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:06:55,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971287590] [2022-11-20 21:06:55,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:06:55,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:06:55,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:06:55,983 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 34 proven. 19 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-20 21:06:55,983 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:06:55,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971287590] [2022-11-20 21:06:55,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971287590] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:06:55,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354415173] [2022-11-20 21:06:55,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:06:55,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:06:55,984 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cad1fe2-f6eb-4ec8-a59a-19b5e2016a28/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:06:55,985 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cad1fe2-f6eb-4ec8-a59a-19b5e2016a28/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:06:55,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cad1fe2-f6eb-4ec8-a59a-19b5e2016a28/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-20 21:06:56,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:06:56,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 579 conjuncts, 62 conjunts are in the unsatisfiable core [2022-11-20 21:06:56,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:06:57,026 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 60 proven. 23 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-20 21:06:57,027 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:06:58,808 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 13 proven. 44 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-20 21:06:58,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354415173] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:06:58,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [406773276] [2022-11-20 21:06:58,811 INFO L159 IcfgInterpreter]: Started Sifa with 69 locations of interest [2022-11-20 21:06:58,812 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 21:06:58,812 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 21:06:58,812 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 21:06:58,812 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 21:07:18,870 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 312 for LOIs [2022-11-20 21:07:20,165 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 261 for LOIs [2022-11-20 21:07:20,253 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 258 for LOIs [2022-11-20 21:07:20,348 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 324 for LOIs [2022-11-20 21:07:23,166 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 182 for LOIs [2022-11-20 21:07:23,514 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 130 for LOIs [2022-11-20 21:07:23,853 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 316 for LOIs [2022-11-20 21:07:25,103 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 339 for LOIs [2022-11-20 21:07:26,073 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 21:08:26,177 WARN L233 SmtUtils]: Spent 5.00s on a formula simplification. DAG size of input: 294 DAG size of output: 227 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 21:08:31,803 WARN L233 SmtUtils]: Spent 5.19s on a formula simplification. DAG size of input: 279 DAG size of output: 217 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 21:08:54,589 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '93861#(and (= ~q_req_up~0 1) (= ~T6_E~0 2) (= ~t6_i~0 0) (= 0 ~t5_pc~0) (<= 2 ~T4_E~0) (<= 1 ~c_dr_i~0) (<= 0 ~t3_i~0) (= ~t7_i~0 0) (<= 0 ~t8_pc~0) (<= ~E_3~0 2) (<= ~t4_st~0 0) (<= 0 ~t1_i~0) (<= 0 ~p_dw_st~0) (<= 0 ~t6_st~0) (<= 0 ~local~0) (<= 2 ~E_M~0) (= ~T1_E~0 2) (<= 0 ~t2_pc~0) (<= ~c_dr_i~0 1) (= ~T5_E~0 2) (<= 2 ~T3_E~0) (<= 0 ~p_dw_pc~0) (<= ~t2_st~0 0) (= ~q_free~0 1) (<= ~E_2~0 2) (<= 0 ~p_num_write~0) (<= ~token~0 0) (= ~T2_E~0 2) (<= ~p_dw_st~0 2) (<= ~t6_pc~0 0) (= 0 ~t5_st~0) (<= 0 ~t7_st~0) (<= ~T7_E~0 2) (<= ~t7_pc~0 0) (<= ~t1_pc~0 0) (<= ~T4_E~0 2) (<= ~t8_i~0 0) (<= 2 ~M_E~0) (<= ~T9_E~0 2) (= ~t9_i~0 0) (<= |#NULL.offset| 0) (= ~t4_i~0 0) (<= 0 ~t9_st~0) (= ~c_dr_pc~0 1) (<= ~t5_i~0 0) (<= 2 ~E_2~0) (<= 2 ~T8_E~0) (<= 2 ~E_9~0) (<= ~local~0 0) (<= 2 ~E_6~0) (= ~m_i~0 0) (<= ~t2_i~0 0) (<= 2 ~E_8~0) (<= ~t8_st~0 0) (not (= ~c_num_read~0 ~p_num_write~0)) (<= ~T3_E~0 2) (<= ~E_4~0 2) (<= 2 ~E_7~0) (<= 2 ~E_3~0) (<= ~t9_pc~0 0) (<= 0 ~t5_i~0) (<= 0 ~t8_st~0) (<= ~t9_st~0 0) (<= ~T8_E~0 2) (<= ~E_6~0 2) (<= 0 ~token~0) (<= 0 ~t2_i~0) (= ~c_last_read~0 ~q_buf_0~0) (<= ~t3_st~0 0) (<= 0 ~t6_pc~0) (<= ~c_num_read~0 1) (<= 0 ~t3_st~0) (<= ~m_pc~0 0) (<= ~t1_i~0 0) (<= 2 ~E_4~0) (= ~p_dw_i~0 1) (<= 2 ~T7_E~0) (<= ~M_E~0 2) (<= ~E_5~0 2) (<= ~m_st~0 0) (<= ~t3_pc~0 0) (= ~c_last_read~0 ~p_last_write~0) (<= 0 ~m_pc~0) (<= 2 ~T9_E~0) (<= ~t3_i~0 0) (<= 0 ~t2_st~0) (<= 0 ~t3_pc~0) (<= 0 ~t7_pc~0) (<= ~t7_st~0 0) (<= ~E_8~0 2) (<= 0 ~t9_pc~0) (<= 2 ~E_5~0) (<= 0 ~t8_i~0) (<= 1 ~c_num_read~0) (<= 0 ~m_st~0) (<= 0 |#NULL.offset|) (<= ~t4_pc~0 0) (= ~E_1~0 2) (<= 0 ~t4_pc~0) (<= ~t2_pc~0 0) (<= ~t1_st~0 0) (<= 0 |#StackHeapBarrier|) (<= ~E_M~0 2) (= ~c_dr_st~0 1) (<= ~t6_st~0 0) (<= 0 ~t1_st~0) (<= ~E_7~0 2) (<= ~t8_pc~0 0) (<= ~E_9~0 2) (<= 0 ~t1_pc~0) (<= 0 ~t4_st~0) (= |#NULL.base| 0))' at error location [2022-11-20 21:08:54,590 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 21:08:54,590 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 21:08:54,590 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 49 [2022-11-20 21:08:54,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113073747] [2022-11-20 21:08:54,590 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 21:08:54,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-11-20 21:08:54,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:08:54,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-11-20 21:08:54,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=898, Invalid=10444, Unknown=0, NotChecked=0, Total=11342 [2022-11-20 21:08:54,594 INFO L87 Difference]: Start difference. First operand 1800 states and 2359 transitions. Second operand has 49 states, 33 states have (on average 6.484848484848484) internal successors, (214), 38 states have internal predecessors, (214), 22 states have call successors, (49), 15 states have call predecessors, (49), 21 states have return successors, (51), 21 states have call predecessors, (51), 22 states have call successors, (51) [2022-11-20 21:09:07,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:09:07,228 INFO L93 Difference]: Finished difference Result 4404 states and 5415 transitions. [2022-11-20 21:09:07,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-11-20 21:09:07,229 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 33 states have (on average 6.484848484848484) internal successors, (214), 38 states have internal predecessors, (214), 22 states have call successors, (49), 15 states have call predecessors, (49), 21 states have return successors, (51), 21 states have call predecessors, (51), 22 states have call successors, (51) Word has length 124 [2022-11-20 21:09:07,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:09:07,242 INFO L225 Difference]: With dead ends: 4404 [2022-11-20 21:09:07,243 INFO L226 Difference]: Without dead ends: 3423 [2022-11-20 21:09:07,250 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 502 GetRequests, 309 SyntacticMatches, 5 SemanticMatches, 188 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14927 ImplicationChecksByTransitivity, 95.9s TimeCoverageRelationStatistics Valid=3666, Invalid=32244, Unknown=0, NotChecked=0, Total=35910 [2022-11-20 21:09:07,251 INFO L413 NwaCegarLoop]: 204 mSDtfsCounter, 5813 mSDsluCounter, 2026 mSDsCounter, 0 mSdLazyCounter, 5358 mSolverCounterSat, 3036 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5814 SdHoareTripleChecker+Valid, 2230 SdHoareTripleChecker+Invalid, 8394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3036 IncrementalHoareTripleChecker+Valid, 5358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2022-11-20 21:09:07,251 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5814 Valid, 2230 Invalid, 8394 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3036 Valid, 5358 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2022-11-20 21:09:07,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3423 states. [2022-11-20 21:09:07,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3423 to 2223. [2022-11-20 21:09:07,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2223 states, 1641 states have (on average 1.275441803778184) internal successors, (2093), 1655 states have internal predecessors, (2093), 327 states have call successors, (327), 222 states have call predecessors, (327), 253 states have return successors, (426), 347 states have call predecessors, (426), 326 states have call successors, (426) [2022-11-20 21:09:07,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2223 states to 2223 states and 2846 transitions. [2022-11-20 21:09:07,882 INFO L78 Accepts]: Start accepts. Automaton has 2223 states and 2846 transitions. Word has length 124 [2022-11-20 21:09:07,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:09:07,883 INFO L495 AbstractCegarLoop]: Abstraction has 2223 states and 2846 transitions. [2022-11-20 21:09:07,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 33 states have (on average 6.484848484848484) internal successors, (214), 38 states have internal predecessors, (214), 22 states have call successors, (49), 15 states have call predecessors, (49), 21 states have return successors, (51), 21 states have call predecessors, (51), 22 states have call successors, (51) [2022-11-20 21:09:07,883 INFO L276 IsEmpty]: Start isEmpty. Operand 2223 states and 2846 transitions. [2022-11-20 21:09:07,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-11-20 21:09:07,886 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:09:07,886 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:09:07,902 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cad1fe2-f6eb-4ec8-a59a-19b5e2016a28/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-20 21:09:08,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cad1fe2-f6eb-4ec8-a59a-19b5e2016a28/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-11-20 21:09:08,096 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:09:08,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:09:08,096 INFO L85 PathProgramCache]: Analyzing trace with hash 242274193, now seen corresponding path program 1 times [2022-11-20 21:09:08,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:09:08,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829708927] [2022-11-20 21:09:08,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:09:08,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:09:08,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:09:08,298 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-20 21:09:08,298 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:09:08,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829708927] [2022-11-20 21:09:08,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829708927] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:09:08,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425272857] [2022-11-20 21:09:08,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:09:08,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:09:08,299 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cad1fe2-f6eb-4ec8-a59a-19b5e2016a28/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:09:08,301 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cad1fe2-f6eb-4ec8-a59a-19b5e2016a28/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:09:08,319 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cad1fe2-f6eb-4ec8-a59a-19b5e2016a28/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-20 21:09:08,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:09:08,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 840 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 21:09:08,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:09:08,619 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-20 21:09:08,620 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:09:08,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [425272857] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:09:08,620 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 21:09:08,620 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-20 21:09:08,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979023878] [2022-11-20 21:09:08,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:09:08,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 21:09:08,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:09:08,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 21:09:08,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-20 21:09:08,623 INFO L87 Difference]: Start difference. First operand 2223 states and 2846 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 2 states have internal predecessors, (73), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-20 21:09:09,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:09:09,228 INFO L93 Difference]: Finished difference Result 3611 states and 5139 transitions. [2022-11-20 21:09:09,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 21:09:09,228 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 2 states have internal predecessors, (73), 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 115 [2022-11-20 21:09:09,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:09:09,239 INFO L225 Difference]: With dead ends: 3611 [2022-11-20 21:09:09,239 INFO L226 Difference]: Without dead ends: 2909 [2022-11-20 21:09:09,244 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-20 21:09:09,244 INFO L413 NwaCegarLoop]: 281 mSDtfsCounter, 291 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 291 SdHoareTripleChecker+Valid, 462 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 21:09:09,245 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [291 Valid, 462 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 21:09:09,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2909 states. [2022-11-20 21:09:09,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2909 to 2902. [2022-11-20 21:09:09,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2902 states, 2203 states have (on average 1.3327280980481162) internal successors, (2936), 2220 states have internal predecessors, (2936), 414 states have call successors, (414), 252 states have call predecessors, (414), 283 states have return successors, (559), 431 states have call predecessors, (559), 413 states have call successors, (559) [2022-11-20 21:09:09,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2902 states to 2902 states and 3909 transitions. [2022-11-20 21:09:09,809 INFO L78 Accepts]: Start accepts. Automaton has 2902 states and 3909 transitions. Word has length 115 [2022-11-20 21:09:09,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:09:09,810 INFO L495 AbstractCegarLoop]: Abstraction has 2902 states and 3909 transitions. [2022-11-20 21:09:09,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 2 states have internal predecessors, (73), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-20 21:09:09,810 INFO L276 IsEmpty]: Start isEmpty. Operand 2902 states and 3909 transitions. [2022-11-20 21:09:09,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-11-20 21:09:09,816 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:09:09,816 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:09:09,830 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cad1fe2-f6eb-4ec8-a59a-19b5e2016a28/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-20 21:09:10,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cad1fe2-f6eb-4ec8-a59a-19b5e2016a28/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-11-20 21:09:10,024 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:09:10,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:09:10,024 INFO L85 PathProgramCache]: Analyzing trace with hash -1778244461, now seen corresponding path program 1 times [2022-11-20 21:09:10,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:09:10,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815320216] [2022-11-20 21:09:10,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:09:10,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:09:10,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:09:10,164 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-20 21:09:10,165 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:09:10,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815320216] [2022-11-20 21:09:10,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815320216] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:09:10,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322970163] [2022-11-20 21:09:10,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:09:10,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:09:10,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cad1fe2-f6eb-4ec8-a59a-19b5e2016a28/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:09:10,167 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cad1fe2-f6eb-4ec8-a59a-19b5e2016a28/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:09:10,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cad1fe2-f6eb-4ec8-a59a-19b5e2016a28/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-20 21:09:10,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:09:10,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 834 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 21:09:10,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:09:10,488 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-20 21:09:10,488 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:09:10,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1322970163] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:09:10,489 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 21:09:10,489 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-20 21:09:10,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176241209] [2022-11-20 21:09:10,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:09:10,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 21:09:10,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:09:10,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 21:09:10,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-20 21:09:10,494 INFO L87 Difference]: Start difference. First operand 2902 states and 3909 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 2 states have internal predecessors, (76), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-20 21:09:11,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:09:11,370 INFO L93 Difference]: Finished difference Result 5633 states and 8393 transitions. [2022-11-20 21:09:11,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 21:09:11,371 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 2 states have internal predecessors, (76), 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 115 [2022-11-20 21:09:11,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:09:11,389 INFO L225 Difference]: With dead ends: 5633 [2022-11-20 21:09:11,389 INFO L226 Difference]: Without dead ends: 4252 [2022-11-20 21:09:11,398 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-20 21:09:11,399 INFO L413 NwaCegarLoop]: 281 mSDtfsCounter, 288 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 462 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 21:09:11,400 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [288 Valid, 462 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 21:09:11,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4252 states. [2022-11-20 21:09:12,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4252 to 4240. [2022-11-20 21:09:12,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4240 states, 3312 states have (on average 1.3864734299516908) internal successors, (4592), 3335 states have internal predecessors, (4592), 583 states have call successors, (583), 312 states have call predecessors, (583), 343 states have return successors, (816), 594 states have call predecessors, (816), 582 states have call successors, (816) [2022-11-20 21:09:12,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4240 states to 4240 states and 5991 transitions. [2022-11-20 21:09:12,186 INFO L78 Accepts]: Start accepts. Automaton has 4240 states and 5991 transitions. Word has length 115 [2022-11-20 21:09:12,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:09:12,186 INFO L495 AbstractCegarLoop]: Abstraction has 4240 states and 5991 transitions. [2022-11-20 21:09:12,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 2 states have internal predecessors, (76), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-20 21:09:12,187 INFO L276 IsEmpty]: Start isEmpty. Operand 4240 states and 5991 transitions. [2022-11-20 21:09:12,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-11-20 21:09:12,194 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:09:12,194 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:09:12,211 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cad1fe2-f6eb-4ec8-a59a-19b5e2016a28/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-20 21:09:12,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cad1fe2-f6eb-4ec8-a59a-19b5e2016a28/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:09:12,406 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:09:12,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:09:12,406 INFO L85 PathProgramCache]: Analyzing trace with hash -384909615, now seen corresponding path program 1 times [2022-11-20 21:09:12,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:09:12,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956961373] [2022-11-20 21:09:12,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:09:12,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:09:12,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:09:12,525 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-20 21:09:12,525 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:09:12,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956961373] [2022-11-20 21:09:12,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956961373] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:09:12,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739397502] [2022-11-20 21:09:12,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:09:12,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:09:12,526 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cad1fe2-f6eb-4ec8-a59a-19b5e2016a28/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:09:12,527 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cad1fe2-f6eb-4ec8-a59a-19b5e2016a28/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:09:12,553 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cad1fe2-f6eb-4ec8-a59a-19b5e2016a28/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-20 21:09:12,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:09:12,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 828 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 21:09:12,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:09:12,794 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-20 21:09:12,795 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:09:12,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739397502] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:09:12,795 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 21:09:12,795 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-20 21:09:12,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515941062] [2022-11-20 21:09:12,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:09:12,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 21:09:12,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:09:12,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 21:09:12,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-20 21:09:12,797 INFO L87 Difference]: Start difference. First operand 4240 states and 5991 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-20 21:09:14,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:09:14,284 INFO L93 Difference]: Finished difference Result 9617 states and 14760 transitions. [2022-11-20 21:09:14,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 21:09:14,284 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 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 115 [2022-11-20 21:09:14,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:09:14,314 INFO L225 Difference]: With dead ends: 9617 [2022-11-20 21:09:14,314 INFO L226 Difference]: Without dead ends: 6898 [2022-11-20 21:09:14,328 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-20 21:09:14,328 INFO L413 NwaCegarLoop]: 281 mSDtfsCounter, 282 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 462 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 21:09:14,329 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [282 Valid, 462 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 21:09:14,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6898 states. [2022-11-20 21:09:15,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6898 to 6876. [2022-11-20 21:09:15,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6876 states, 5500 states have (on average 1.4261818181818182) internal successors, (7844), 5535 states have internal predecessors, (7844), 911 states have call successors, (911), 432 states have call predecessors, (911), 463 states have return successors, (1312), 910 states have call predecessors, (1312), 910 states have call successors, (1312) [2022-11-20 21:09:15,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6876 states to 6876 states and 10067 transitions. [2022-11-20 21:09:15,351 INFO L78 Accepts]: Start accepts. Automaton has 6876 states and 10067 transitions. Word has length 115 [2022-11-20 21:09:15,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:09:15,352 INFO L495 AbstractCegarLoop]: Abstraction has 6876 states and 10067 transitions. [2022-11-20 21:09:15,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-20 21:09:15,352 INFO L276 IsEmpty]: Start isEmpty. Operand 6876 states and 10067 transitions. [2022-11-20 21:09:15,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-11-20 21:09:15,366 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:09:15,367 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:09:15,375 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cad1fe2-f6eb-4ec8-a59a-19b5e2016a28/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-20 21:09:15,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cad1fe2-f6eb-4ec8-a59a-19b5e2016a28/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:09:15,574 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:09:15,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:09:15,575 INFO L85 PathProgramCache]: Analyzing trace with hash 1060331407, now seen corresponding path program 1 times [2022-11-20 21:09:15,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:09:15,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967077605] [2022-11-20 21:09:15,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:09:15,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:09:15,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:09:15,710 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-20 21:09:15,710 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:09:15,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967077605] [2022-11-20 21:09:15,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967077605] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:09:15,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712123352] [2022-11-20 21:09:15,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:09:15,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:09:15,711 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cad1fe2-f6eb-4ec8-a59a-19b5e2016a28/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:09:15,713 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cad1fe2-f6eb-4ec8-a59a-19b5e2016a28/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:09:15,730 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cad1fe2-f6eb-4ec8-a59a-19b5e2016a28/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-20 21:09:15,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:09:15,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 822 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-20 21:09:15,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:09:16,065 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-20 21:09:16,066 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 21:09:16,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [712123352] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:09:16,066 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 21:09:16,066 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-20 21:09:16,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118400452] [2022-11-20 21:09:16,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:09:16,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 21:09:16,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:09:16,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 21:09:16,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-20 21:09:16,068 INFO L87 Difference]: Start difference. First operand 6876 states and 10067 transitions. Second operand has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 2 states have internal predecessors, (88), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-20 21:09:18,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:09:18,173 INFO L93 Difference]: Finished difference Result 17465 states and 27212 transitions. [2022-11-20 21:09:18,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 21:09:18,174 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 2 states have internal predecessors, (88), 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 115 [2022-11-20 21:09:18,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:09:18,229 INFO L225 Difference]: With dead ends: 17465 [2022-11-20 21:09:18,229 INFO L226 Difference]: Without dead ends: 12110 [2022-11-20 21:09:18,252 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-20 21:09:18,253 INFO L413 NwaCegarLoop]: 281 mSDtfsCounter, 276 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 276 SdHoareTripleChecker+Valid, 462 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 21:09:18,253 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [276 Valid, 462 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 21:09:18,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12110 states. [2022-11-20 21:09:20,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12110 to 12068. [2022-11-20 21:09:20,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12068 states, 9816 states have (on average 1.4494702526487369) internal successors, (14228), 9875 states have internal predecessors, (14228), 1547 states have call successors, (1547), 672 states have call predecessors, (1547), 703 states have return successors, (2268), 1522 states have call predecessors, (2268), 1546 states have call successors, (2268) [2022-11-20 21:09:20,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12068 states to 12068 states and 18043 transitions. [2022-11-20 21:09:20,101 INFO L78 Accepts]: Start accepts. Automaton has 12068 states and 18043 transitions. Word has length 115 [2022-11-20 21:09:20,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:09:20,102 INFO L495 AbstractCegarLoop]: Abstraction has 12068 states and 18043 transitions. [2022-11-20 21:09:20,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 2 states have internal predecessors, (88), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-20 21:09:20,102 INFO L276 IsEmpty]: Start isEmpty. Operand 12068 states and 18043 transitions. [2022-11-20 21:09:20,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-11-20 21:09:20,120 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:09:20,121 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:09:20,136 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cad1fe2-f6eb-4ec8-a59a-19b5e2016a28/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-20 21:09:20,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cad1fe2-f6eb-4ec8-a59a-19b5e2016a28/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-20 21:09:20,337 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:09:20,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:09:20,338 INFO L85 PathProgramCache]: Analyzing trace with hash -1298733363, now seen corresponding path program 1 times [2022-11-20 21:09:20,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:09:20,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182150938] [2022-11-20 21:09:20,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:09:20,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:09:20,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:09:20,432 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-20 21:09:20,432 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:09:20,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182150938] [2022-11-20 21:09:20,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182150938] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:09:20,433 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:09:20,433 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 21:09:20,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162444334] [2022-11-20 21:09:20,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:09:20,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 21:09:20,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:09:20,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 21:09:20,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:09:20,435 INFO L87 Difference]: Start difference. First operand 12068 states and 18043 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 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) [2022-11-20 21:09:22,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:09:22,709 INFO L93 Difference]: Finished difference Result 22918 states and 35628 transitions. [2022-11-20 21:09:22,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 21:09:22,710 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 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 115 [2022-11-20 21:09:22,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:09:22,779 INFO L225 Difference]: With dead ends: 22918 [2022-11-20 21:09:22,779 INFO L226 Difference]: Without dead ends: 14468 [2022-11-20 21:09:22,810 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:09:22,811 INFO L413 NwaCegarLoop]: 368 mSDtfsCounter, 101 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 641 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 21:09:22,812 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 641 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 21:09:22,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14468 states. [2022-11-20 21:09:24,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14468 to 13652. [2022-11-20 21:09:24,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13652 states, 11336 states have (on average 1.4880028228652082) internal successors, (16868), 11395 states have internal predecessors, (16868), 1579 states have call successors, (1579), 704 states have call predecessors, (1579), 735 states have return successors, (2300), 1554 states have call predecessors, (2300), 1578 states have call successors, (2300) [2022-11-20 21:09:24,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13652 states to 13652 states and 20747 transitions. [2022-11-20 21:09:24,849 INFO L78 Accepts]: Start accepts. Automaton has 13652 states and 20747 transitions. Word has length 115 [2022-11-20 21:09:24,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:09:24,850 INFO L495 AbstractCegarLoop]: Abstraction has 13652 states and 20747 transitions. [2022-11-20 21:09:24,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 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) [2022-11-20 21:09:24,850 INFO L276 IsEmpty]: Start isEmpty. Operand 13652 states and 20747 transitions. [2022-11-20 21:09:24,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-11-20 21:09:24,868 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:09:24,868 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:09:24,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-11-20 21:09:24,869 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:09:24,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:09:24,869 INFO L85 PathProgramCache]: Analyzing trace with hash 1184495361, now seen corresponding path program 1 times [2022-11-20 21:09:24,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:09:24,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701880558] [2022-11-20 21:09:24,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:09:24,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:09:24,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:09:25,084 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 38 proven. 9 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-20 21:09:25,084 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:09:25,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701880558] [2022-11-20 21:09:25,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701880558] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:09:25,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177383890] [2022-11-20 21:09:25,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:09:25,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:09:25,086 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cad1fe2-f6eb-4ec8-a59a-19b5e2016a28/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:09:25,087 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cad1fe2-f6eb-4ec8-a59a-19b5e2016a28/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:09:25,097 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cad1fe2-f6eb-4ec8-a59a-19b5e2016a28/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-20 21:09:25,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:09:25,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 578 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-20 21:09:25,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:09:25,433 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 50 proven. 17 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-20 21:09:25,433 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:09:25,642 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-20 21:09:25,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1177383890] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-20 21:09:25,643 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-20 21:09:25,643 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9, 10] total 17 [2022-11-20 21:09:25,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103216663] [2022-11-20 21:09:25,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:09:25,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 21:09:25,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:09:25,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 21:09:25,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2022-11-20 21:09:25,644 INFO L87 Difference]: Start difference. First operand 13652 states and 20747 transitions. Second operand has 8 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-20 21:09:28,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:09:28,671 INFO L93 Difference]: Finished difference Result 14392 states and 21586 transitions. [2022-11-20 21:09:28,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-20 21:09:28,671 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) Word has length 125 [2022-11-20 21:09:28,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:09:28,730 INFO L225 Difference]: With dead ends: 14392 [2022-11-20 21:09:28,730 INFO L226 Difference]: Without dead ends: 12988 [2022-11-20 21:09:28,738 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 247 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2022-11-20 21:09:28,739 INFO L413 NwaCegarLoop]: 221 mSDtfsCounter, 629 mSDsluCounter, 540 mSDsCounter, 0 mSdLazyCounter, 1013 mSolverCounterSat, 158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 631 SdHoareTripleChecker+Valid, 761 SdHoareTripleChecker+Invalid, 1171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 1013 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-20 21:09:28,740 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [631 Valid, 761 Invalid, 1171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 1013 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-20 21:09:28,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12988 states. [2022-11-20 21:09:31,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12988 to 12671. [2022-11-20 21:09:31,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12671 states, 10643 states have (on average 1.5084092830968712) internal successors, (16054), 10700 states have internal predecessors, (16054), 1432 states have call successors, (1432), 585 states have call predecessors, (1432), 594 states have return successors, (2120), 1387 states have call predecessors, (2120), 1431 states have call successors, (2120) [2022-11-20 21:09:31,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12671 states to 12671 states and 19606 transitions. [2022-11-20 21:09:31,415 INFO L78 Accepts]: Start accepts. Automaton has 12671 states and 19606 transitions. Word has length 125 [2022-11-20 21:09:31,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:09:31,416 INFO L495 AbstractCegarLoop]: Abstraction has 12671 states and 19606 transitions. [2022-11-20 21:09:31,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2022-11-20 21:09:31,416 INFO L276 IsEmpty]: Start isEmpty. Operand 12671 states and 19606 transitions. [2022-11-20 21:09:31,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-11-20 21:09:31,449 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:09:31,449 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-20 21:09:31,460 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cad1fe2-f6eb-4ec8-a59a-19b5e2016a28/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-20 21:09:31,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2cad1fe2-f6eb-4ec8-a59a-19b5e2016a28/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-20 21:09:31,655 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:09:31,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:09:31,655 INFO L85 PathProgramCache]: Analyzing trace with hash 508960707, now seen corresponding path program 1 times [2022-11-20 21:09:31,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:09:31,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955892575] [2022-11-20 21:09:31,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:09:31,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:09:31,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:09:31,743 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2022-11-20 21:09:31,743 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:09:31,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955892575] [2022-11-20 21:09:31,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955892575] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:09:31,744 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:09:31,744 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 21:09:31,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11683852] [2022-11-20 21:09:31,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:09:31,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 21:09:31,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:09:31,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 21:09:31,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:09:31,747 INFO L87 Difference]: Start difference. First operand 12671 states and 19606 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, (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) [2022-11-20 21:09:35,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:09:35,320 INFO L93 Difference]: Finished difference Result 36580 states and 58299 transitions. [2022-11-20 21:09:35,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 21:09:35,321 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, (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 156 [2022-11-20 21:09:35,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:09:35,434 INFO L225 Difference]: With dead ends: 36580 [2022-11-20 21:09:35,435 INFO L226 Difference]: Without dead ends: 24449 [2022-11-20 21:09:35,476 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:09:35,477 INFO L413 NwaCegarLoop]: 283 mSDtfsCounter, 280 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 464 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 21:09:35,477 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [280 Valid, 464 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 21:09:35,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24449 states. [2022-11-20 21:09:39,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24449 to 24335. [2022-11-20 21:09:39,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24335 states, 20531 states have (on average 1.506697189615703) internal successors, (30934), 20636 states have internal predecessors, (30934), 2696 states have call successors, (2696), 1097 states have call predecessors, (2696), 1106 states have return successors, (3992), 2603 states have call predecessors, (3992), 2695 states have call successors, (3992) [2022-11-20 21:09:39,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24335 states to 24335 states and 37622 transitions. [2022-11-20 21:09:39,662 INFO L78 Accepts]: Start accepts. Automaton has 24335 states and 37622 transitions. Word has length 156 [2022-11-20 21:09:39,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:09:39,663 INFO L495 AbstractCegarLoop]: Abstraction has 24335 states and 37622 transitions. [2022-11-20 21:09:39,663 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, (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) [2022-11-20 21:09:39,663 INFO L276 IsEmpty]: Start isEmpty. Operand 24335 states and 37622 transitions. [2022-11-20 21:09:39,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-11-20 21:09:39,715 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:09:39,715 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-20 21:09:39,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-11-20 21:09:39,715 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:09:39,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:09:39,715 INFO L85 PathProgramCache]: Analyzing trace with hash -1052014768, now seen corresponding path program 1 times [2022-11-20 21:09:39,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:09:39,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602358491] [2022-11-20 21:09:39,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:09:39,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:09:39,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:09:39,819 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2022-11-20 21:09:39,819 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:09:39,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602358491] [2022-11-20 21:09:39,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602358491] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:09:39,820 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:09:39,820 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 21:09:39,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561433691] [2022-11-20 21:09:39,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:09:39,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 21:09:39,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:09:39,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 21:09:39,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:09:39,822 INFO L87 Difference]: Start difference. First operand 24335 states and 37622 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, (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) [2022-11-20 21:09:47,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:09:47,079 INFO L93 Difference]: Finished difference Result 71220 states and 112875 transitions. [2022-11-20 21:09:47,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 21:09:47,080 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, (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 156 [2022-11-20 21:09:47,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:09:47,268 INFO L225 Difference]: With dead ends: 71220 [2022-11-20 21:09:47,268 INFO L226 Difference]: Without dead ends: 47425 [2022-11-20 21:09:47,351 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:09:47,352 INFO L413 NwaCegarLoop]: 283 mSDtfsCounter, 282 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 464 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 21:09:47,352 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [282 Valid, 464 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 21:09:47,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47425 states. [2022-11-20 21:09:55,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47425 to 47199. [2022-11-20 21:09:55,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47199 states, 39923 states have (on average 1.501039501039501) internal successors, (59926), 40124 states have internal predecessors, (59926), 5144 states have call successors, (5144), 2121 states have call predecessors, (5144), 2130 states have return successors, (7592), 4955 states have call predecessors, (7592), 5143 states have call successors, (7592) [2022-11-20 21:09:55,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47199 states to 47199 states and 72662 transitions. [2022-11-20 21:09:55,750 INFO L78 Accepts]: Start accepts. Automaton has 47199 states and 72662 transitions. Word has length 156 [2022-11-20 21:09:55,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:09:55,751 INFO L495 AbstractCegarLoop]: Abstraction has 47199 states and 72662 transitions. [2022-11-20 21:09:55,751 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, (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) [2022-11-20 21:09:55,751 INFO L276 IsEmpty]: Start isEmpty. Operand 47199 states and 72662 transitions. [2022-11-20 21:09:55,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-11-20 21:09:55,874 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:09:55,874 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-20 21:09:55,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-11-20 21:09:55,874 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:09:55,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:09:55,875 INFO L85 PathProgramCache]: Analyzing trace with hash 698892323, now seen corresponding path program 1 times [2022-11-20 21:09:55,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:09:55,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303640574] [2022-11-20 21:09:55,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:09:55,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:09:55,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:09:55,987 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2022-11-20 21:09:55,987 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:09:55,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303640574] [2022-11-20 21:09:55,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303640574] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:09:55,988 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:09:55,988 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 21:09:55,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944983482] [2022-11-20 21:09:55,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:09:55,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 21:09:55,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:09:55,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 21:09:55,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 21:09:55,990 INFO L87 Difference]: Start difference. First operand 47199 states and 72662 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, (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)