./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.09.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_499cefbd-39e4-4716-939a-318b8ab7546b/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_499cefbd-39e4-4716-939a-318b8ab7546b/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_499cefbd-39e4-4716-939a-318b8ab7546b/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_499cefbd-39e4-4716-939a-318b8ab7546b/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.09.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_499cefbd-39e4-4716-939a-318b8ab7546b/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_499cefbd-39e4-4716-939a-318b8ab7546b/bin/utaipan-gh47qXpMRh --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 43061c6fd2cf55dd1721985927e668f0444e5f80f3517bfb8a4405f126e779da --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 12:07:03,707 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 12:07:03,709 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 12:07:03,722 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 12:07:03,722 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 12:07:03,723 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 12:07:03,724 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 12:07:03,725 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 12:07:03,726 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 12:07:03,726 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 12:07:03,727 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 12:07:03,728 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 12:07:03,728 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 12:07:03,729 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 12:07:03,729 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 12:07:03,730 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 12:07:03,731 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 12:07:03,731 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 12:07:03,732 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 12:07:03,733 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 12:07:03,734 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 12:07:03,735 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 12:07:03,736 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 12:07:03,736 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 12:07:03,738 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 12:07:03,738 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 12:07:03,739 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 12:07:03,739 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 12:07:03,740 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 12:07:03,740 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 12:07:03,740 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 12:07:03,741 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 12:07:03,741 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 12:07:03,742 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 12:07:03,743 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 12:07:03,743 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 12:07:03,743 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 12:07:03,743 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 12:07:03,743 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 12:07:03,744 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 12:07:03,744 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 12:07:03,745 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_499cefbd-39e4-4716-939a-318b8ab7546b/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 12:07:03,759 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 12:07:03,759 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 12:07:03,760 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 12:07:03,765 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 12:07:03,765 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 12:07:03,766 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 12:07:03,766 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 12:07:03,766 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 12:07:03,766 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 12:07:03,766 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 12:07:03,766 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 12:07:03,767 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 12:07:03,767 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 12:07:03,767 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 12:07:03,767 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 12:07:03,767 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 12:07:03,768 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 12:07:03,768 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 12:07:03,768 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 12:07:03,769 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 12:07:03,769 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 12:07:03,769 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 12:07:03,769 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 12:07:03,769 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 12:07:03,769 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 12:07:03,770 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 12:07:03,770 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 12:07:03,770 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 12:07:03,770 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 12:07:03,770 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 12:07:03,770 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 12:07:03,771 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 12:07:03,771 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 12:07:03,771 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 12:07:03,771 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 12:07:03,771 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 12:07:03,772 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 12:07:03,772 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 12:07:03,772 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 12:07:03,772 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 12:07:03,772 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 12:07:03,773 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_499cefbd-39e4-4716-939a-318b8ab7546b/bin/utaipan-gh47qXpMRh/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_499cefbd-39e4-4716-939a-318b8ab7546b/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 43061c6fd2cf55dd1721985927e668f0444e5f80f3517bfb8a4405f126e779da [2022-12-14 12:07:03,937 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 12:07:03,954 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 12:07:03,956 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 12:07:03,957 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 12:07:03,957 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 12:07:03,958 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_499cefbd-39e4-4716-939a-318b8ab7546b/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.09.cil-2.c [2022-12-14 12:07:06,524 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 12:07:06,664 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 12:07:06,665 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_499cefbd-39e4-4716-939a-318b8ab7546b/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.09.cil-2.c [2022-12-14 12:07:06,674 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_499cefbd-39e4-4716-939a-318b8ab7546b/bin/utaipan-gh47qXpMRh/data/61eca31fa/93f565ec902d4324ad1eb49bc0e45a96/FLAG3c7211897 [2022-12-14 12:07:06,684 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_499cefbd-39e4-4716-939a-318b8ab7546b/bin/utaipan-gh47qXpMRh/data/61eca31fa/93f565ec902d4324ad1eb49bc0e45a96 [2022-12-14 12:07:06,686 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 12:07:06,687 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 12:07:06,688 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 12:07:06,688 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 12:07:06,691 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 12:07:06,691 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 12:07:06" (1/1) ... [2022-12-14 12:07:06,692 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1581006b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:07:06, skipping insertion in model container [2022-12-14 12:07:06,692 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 12:07:06" (1/1) ... [2022-12-14 12:07:06,698 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 12:07:06,726 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 12:07:06,828 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_499cefbd-39e4-4716-939a-318b8ab7546b/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.09.cil-2.c[913,926] [2022-12-14 12:07:06,860 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_499cefbd-39e4-4716-939a-318b8ab7546b/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.09.cil-2.c[5977,5990] [2022-12-14 12:07:06,915 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 12:07:06,925 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 12:07:06,933 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_499cefbd-39e4-4716-939a-318b8ab7546b/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.09.cil-2.c[913,926] [2022-12-14 12:07:06,943 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_499cefbd-39e4-4716-939a-318b8ab7546b/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.09.cil-2.c[5977,5990] [2022-12-14 12:07:06,979 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 12:07:06,993 INFO L208 MainTranslator]: Completed translation [2022-12-14 12:07:06,993 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:07:06 WrapperNode [2022-12-14 12:07:06,994 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 12:07:06,994 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 12:07:06,994 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 12:07:06,994 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 12:07:06,999 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:07:06" (1/1) ... [2022-12-14 12:07:07,008 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:07:06" (1/1) ... [2022-12-14 12:07:07,038 INFO L138 Inliner]: procedures = 66, calls = 76, calls flagged for inlining = 40, calls inlined = 40, statements flattened = 886 [2022-12-14 12:07:07,038 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 12:07:07,038 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 12:07:07,038 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 12:07:07,039 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 12:07:07,046 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:07:06" (1/1) ... [2022-12-14 12:07:07,046 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:07:06" (1/1) ... [2022-12-14 12:07:07,048 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:07:06" (1/1) ... [2022-12-14 12:07:07,049 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:07:06" (1/1) ... [2022-12-14 12:07:07,057 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:07:06" (1/1) ... [2022-12-14 12:07:07,065 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:07:06" (1/1) ... [2022-12-14 12:07:07,067 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:07:06" (1/1) ... [2022-12-14 12:07:07,069 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:07:06" (1/1) ... [2022-12-14 12:07:07,073 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 12:07:07,073 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 12:07:07,073 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 12:07:07,073 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 12:07:07,074 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:07:06" (1/1) ... [2022-12-14 12:07:07,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 12:07:07,088 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_499cefbd-39e4-4716-939a-318b8ab7546b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:07:07,098 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_499cefbd-39e4-4716-939a-318b8ab7546b/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 12:07:07,100 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_499cefbd-39e4-4716-939a-318b8ab7546b/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 12:07:07,134 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 12:07:07,134 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-12-14 12:07:07,134 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-12-14 12:07:07,135 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify_threads [2022-12-14 12:07:07,135 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify_threads [2022-12-14 12:07:07,135 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2022-12-14 12:07:07,135 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2022-12-14 12:07:07,135 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2022-12-14 12:07:07,135 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2022-12-14 12:07:07,135 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2022-12-14 12:07:07,136 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2022-12-14 12:07:07,136 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2022-12-14 12:07:07,136 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2022-12-14 12:07:07,136 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2022-12-14 12:07:07,136 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2022-12-14 12:07:07,136 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 12:07:07,136 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2022-12-14 12:07:07,137 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2022-12-14 12:07:07,137 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 12:07:07,137 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 12:07:07,137 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2022-12-14 12:07:07,137 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2022-12-14 12:07:07,137 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2022-12-14 12:07:07,137 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2022-12-14 12:07:07,238 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 12:07:07,240 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 12:07:07,813 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 12:07:08,077 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 12:07:08,077 INFO L300 CfgBuilder]: Removed 16 assume(true) statements. [2022-12-14 12:07:08,080 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 12:07:08 BoogieIcfgContainer [2022-12-14 12:07:08,080 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 12:07:08,082 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 12:07:08,082 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 12:07:08,084 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 12:07:08,084 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 12:07:06" (1/3) ... [2022-12-14 12:07:08,085 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3098284d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 12:07:08, skipping insertion in model container [2022-12-14 12:07:08,085 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:07:06" (2/3) ... [2022-12-14 12:07:08,085 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3098284d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 12:07:08, skipping insertion in model container [2022-12-14 12:07:08,085 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 12:07:08" (3/3) ... [2022-12-14 12:07:08,086 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_1.cil-2+token_ring.09.cil-2.c [2022-12-14 12:07:08,102 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 12:07:08,102 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-12-14 12:07:08,159 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 12:07:08,165 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;@7351d78c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 12:07:08,165 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-12-14 12:07:08,171 INFO L276 IsEmpty]: Start isEmpty. Operand has 212 states, 168 states have (on average 1.5654761904761905) internal successors, (263), 175 states have internal predecessors, (263), 31 states have call successors, (31), 10 states have call predecessors, (31), 10 states have return successors, (31), 29 states have call predecessors, (31), 31 states have call successors, (31) [2022-12-14 12:07:08,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-12-14 12:07:08,180 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:07:08,181 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:07:08,181 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:07:08,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:07:08,186 INFO L85 PathProgramCache]: Analyzing trace with hash 279361633, now seen corresponding path program 1 times [2022-12-14 12:07:08,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:07:08,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75669611] [2022-12-14 12:07:08,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:07:08,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:07:08,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:07:08,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:07:08,417 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:07:08,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75669611] [2022-12-14 12:07:08,418 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75669611] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:07:08,418 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:07:08,418 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 12:07:08,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879621168] [2022-12-14 12:07:08,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:07:08,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 12:07:08,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:07:08,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 12:07:08,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 12:07:08,453 INFO L87 Difference]: Start difference. First operand has 212 states, 168 states have (on average 1.5654761904761905) internal successors, (263), 175 states have internal predecessors, (263), 31 states have call successors, (31), 10 states have call predecessors, (31), 10 states have return successors, (31), 29 states have call predecessors, (31), 31 states have call successors, (31) Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 12:07:08,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:07:08,616 INFO L93 Difference]: Finished difference Result 456 states and 698 transitions. [2022-12-14 12:07:08,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 12:07:08,618 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 28 [2022-12-14 12:07:08,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:07:08,628 INFO L225 Difference]: With dead ends: 456 [2022-12-14 12:07:08,628 INFO L226 Difference]: Without dead ends: 244 [2022-12-14 12:07:08,632 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 12:07:08,635 INFO L413 NwaCegarLoop]: 275 mSDtfsCounter, 290 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 290 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:07:08,636 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [290 Valid, 330 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:07:08,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2022-12-14 12:07:08,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 240. [2022-12-14 12:07:08,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 194 states have (on average 1.4948453608247423) internal successors, (290), 198 states have internal predecessors, (290), 34 states have call successors, (34), 12 states have call predecessors, (34), 10 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2022-12-14 12:07:08,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 354 transitions. [2022-12-14 12:07:08,692 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 354 transitions. Word has length 28 [2022-12-14 12:07:08,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:07:08,693 INFO L495 AbstractCegarLoop]: Abstraction has 240 states and 354 transitions. [2022-12-14 12:07:08,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 12:07:08,693 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 354 transitions. [2022-12-14 12:07:08,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-12-14 12:07:08,695 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:07:08,695 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:07:08,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 12:07:08,696 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:07:08,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:07:08,697 INFO L85 PathProgramCache]: Analyzing trace with hash 951515243, now seen corresponding path program 1 times [2022-12-14 12:07:08,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:07:08,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118606827] [2022-12-14 12:07:08,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:07:08,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:07:08,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:07:08,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:07:08,751 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:07:08,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118606827] [2022-12-14 12:07:08,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118606827] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:07:08,752 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:07:08,752 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 12:07:08,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527322359] [2022-12-14 12:07:08,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:07:08,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 12:07:08,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:07:08,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 12:07:08,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 12:07:08,755 INFO L87 Difference]: Start difference. First operand 240 states and 354 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 12:07:08,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:07:08,848 INFO L93 Difference]: Finished difference Result 396 states and 571 transitions. [2022-12-14 12:07:08,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 12:07:08,848 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 29 [2022-12-14 12:07:08,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:07:08,851 INFO L225 Difference]: With dead ends: 396 [2022-12-14 12:07:08,851 INFO L226 Difference]: Without dead ends: 315 [2022-12-14 12:07:08,852 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 12:07:08,853 INFO L413 NwaCegarLoop]: 262 mSDtfsCounter, 288 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:07:08,854 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [288 Valid, 315 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:07:08,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2022-12-14 12:07:08,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 311. [2022-12-14 12:07:08,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 254 states have (on average 1.4606299212598426) internal successors, (371), 258 states have internal predecessors, (371), 41 states have call successors, (41), 16 states have call predecessors, (41), 14 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2022-12-14 12:07:08,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 449 transitions. [2022-12-14 12:07:08,886 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 449 transitions. Word has length 29 [2022-12-14 12:07:08,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:07:08,886 INFO L495 AbstractCegarLoop]: Abstraction has 311 states and 449 transitions. [2022-12-14 12:07:08,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 12:07:08,887 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 449 transitions. [2022-12-14 12:07:08,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-12-14 12:07:08,888 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:07:08,889 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:07:08,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 12:07:08,889 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:07:08,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:07:08,890 INFO L85 PathProgramCache]: Analyzing trace with hash 876442346, now seen corresponding path program 1 times [2022-12-14 12:07:08,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:07:08,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389964050] [2022-12-14 12:07:08,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:07:08,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:07:08,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:07:08,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:07:08,931 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:07:08,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389964050] [2022-12-14 12:07:08,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389964050] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:07:08,932 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:07:08,932 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 12:07:08,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437974186] [2022-12-14 12:07:08,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:07:08,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 12:07:08,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:07:08,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 12:07:08,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 12:07:08,933 INFO L87 Difference]: Start difference. First operand 311 states and 449 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 12:07:09,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:07:09,052 INFO L93 Difference]: Finished difference Result 551 states and 777 transitions. [2022-12-14 12:07:09,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 12:07:09,053 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 30 [2022-12-14 12:07:09,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:07:09,055 INFO L225 Difference]: With dead ends: 551 [2022-12-14 12:07:09,055 INFO L226 Difference]: Without dead ends: 399 [2022-12-14 12:07:09,056 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 12:07:09,057 INFO L413 NwaCegarLoop]: 272 mSDtfsCounter, 46 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 515 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:07:09,058 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 515 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:07:09,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2022-12-14 12:07:09,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 385. [2022-12-14 12:07:09,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 317 states have (on average 1.4384858044164037) internal successors, (456), 323 states have internal predecessors, (456), 47 states have call successors, (47), 21 states have call predecessors, (47), 19 states have return successors, (43), 41 states have call predecessors, (43), 43 states have call successors, (43) [2022-12-14 12:07:09,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 546 transitions. [2022-12-14 12:07:09,084 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 546 transitions. Word has length 30 [2022-12-14 12:07:09,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:07:09,085 INFO L495 AbstractCegarLoop]: Abstraction has 385 states and 546 transitions. [2022-12-14 12:07:09,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-14 12:07:09,085 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 546 transitions. [2022-12-14 12:07:09,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-12-14 12:07:09,087 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:07:09,087 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:07:09,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 12:07:09,087 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:07:09,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:07:09,088 INFO L85 PathProgramCache]: Analyzing trace with hash 321411087, now seen corresponding path program 1 times [2022-12-14 12:07:09,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:07:09,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855637130] [2022-12-14 12:07:09,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:07:09,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:07:09,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:07:09,157 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 12:07:09,157 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:07:09,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855637130] [2022-12-14 12:07:09,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855637130] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:07:09,157 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:07:09,158 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 12:07:09,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713107660] [2022-12-14 12:07:09,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:07:09,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 12:07:09,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:07:09,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 12:07:09,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 12:07:09,159 INFO L87 Difference]: Start difference. First operand 385 states and 546 transitions. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-14 12:07:09,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:07:09,269 INFO L93 Difference]: Finished difference Result 548 states and 764 transitions. [2022-12-14 12:07:09,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 12:07:09,269 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 43 [2022-12-14 12:07:09,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:07:09,273 INFO L225 Difference]: With dead ends: 548 [2022-12-14 12:07:09,273 INFO L226 Difference]: Without dead ends: 390 [2022-12-14 12:07:09,274 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 12:07:09,275 INFO L413 NwaCegarLoop]: 291 mSDtfsCounter, 32 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 547 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:07:09,275 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 547 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:07:09,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2022-12-14 12:07:09,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 379. [2022-12-14 12:07:09,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379 states, 311 states have (on average 1.4212218649517685) internal successors, (442), 317 states have internal predecessors, (442), 47 states have call successors, (47), 21 states have call predecessors, (47), 19 states have return successors, (43), 41 states have call predecessors, (43), 43 states have call successors, (43) [2022-12-14 12:07:09,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 532 transitions. [2022-12-14 12:07:09,294 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 532 transitions. Word has length 43 [2022-12-14 12:07:09,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:07:09,294 INFO L495 AbstractCegarLoop]: Abstraction has 379 states and 532 transitions. [2022-12-14 12:07:09,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-14 12:07:09,295 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 532 transitions. [2022-12-14 12:07:09,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-12-14 12:07:09,296 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:07:09,296 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:07:09,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-14 12:07:09,296 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:07:09,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:07:09,296 INFO L85 PathProgramCache]: Analyzing trace with hash -1315205855, now seen corresponding path program 1 times [2022-12-14 12:07:09,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:07:09,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445713866] [2022-12-14 12:07:09,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:07:09,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:07:09,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:07:09,333 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-14 12:07:09,334 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:07:09,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445713866] [2022-12-14 12:07:09,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445713866] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:07:09,334 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:07:09,335 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 12:07:09,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551140753] [2022-12-14 12:07:09,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:07:09,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 12:07:09,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:07:09,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 12:07:09,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 12:07:09,336 INFO L87 Difference]: Start difference. First operand 379 states and 532 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-12-14 12:07:09,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:07:09,444 INFO L93 Difference]: Finished difference Result 628 states and 856 transitions. [2022-12-14 12:07:09,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 12:07:09,444 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 46 [2022-12-14 12:07:09,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:07:09,447 INFO L225 Difference]: With dead ends: 628 [2022-12-14 12:07:09,447 INFO L226 Difference]: Without dead ends: 425 [2022-12-14 12:07:09,448 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 12:07:09,449 INFO L413 NwaCegarLoop]: 261 mSDtfsCounter, 274 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 313 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:07:09,450 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [274 Valid, 313 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:07:09,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2022-12-14 12:07:09,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 425. [2022-12-14 12:07:09,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 425 states, 350 states have (on average 1.3857142857142857) internal successors, (485), 356 states have internal predecessors, (485), 51 states have call successors, (51), 24 states have call predecessors, (51), 22 states have return successors, (47), 45 states have call predecessors, (47), 47 states have call successors, (47) [2022-12-14 12:07:09,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 583 transitions. [2022-12-14 12:07:09,484 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 583 transitions. Word has length 46 [2022-12-14 12:07:09,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:07:09,484 INFO L495 AbstractCegarLoop]: Abstraction has 425 states and 583 transitions. [2022-12-14 12:07:09,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-12-14 12:07:09,484 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 583 transitions. [2022-12-14 12:07:09,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-12-14 12:07:09,485 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:07:09,485 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] [2022-12-14 12:07:09,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-14 12:07:09,486 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:07:09,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:07:09,486 INFO L85 PathProgramCache]: Analyzing trace with hash 1434878858, now seen corresponding path program 1 times [2022-12-14 12:07:09,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:07:09,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204636714] [2022-12-14 12:07:09,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:07:09,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:07:09,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:07:09,527 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-14 12:07:09,528 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:07:09,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204636714] [2022-12-14 12:07:09,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204636714] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:07:09,528 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:07:09,528 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 12:07:09,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159543326] [2022-12-14 12:07:09,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:07:09,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 12:07:09,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:07:09,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 12:07:09,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 12:07:09,530 INFO L87 Difference]: Start difference. First operand 425 states and 583 transitions. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-12-14 12:07:09,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:07:09,708 INFO L93 Difference]: Finished difference Result 652 states and 883 transitions. [2022-12-14 12:07:09,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 12:07:09,709 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 47 [2022-12-14 12:07:09,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:07:09,711 INFO L225 Difference]: With dead ends: 652 [2022-12-14 12:07:09,711 INFO L226 Difference]: Without dead ends: 423 [2022-12-14 12:07:09,711 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 12:07:09,712 INFO L413 NwaCegarLoop]: 289 mSDtfsCounter, 329 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 329 SdHoareTripleChecker+Valid, 512 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:07:09,712 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [329 Valid, 512 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:07:09,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2022-12-14 12:07:09,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 421. [2022-12-14 12:07:09,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 421 states, 346 states have (on average 1.3554913294797688) internal successors, (469), 352 states have internal predecessors, (469), 51 states have call successors, (51), 24 states have call predecessors, (51), 22 states have return successors, (47), 45 states have call predecessors, (47), 47 states have call successors, (47) [2022-12-14 12:07:09,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 567 transitions. [2022-12-14 12:07:09,727 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 567 transitions. Word has length 47 [2022-12-14 12:07:09,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:07:09,728 INFO L495 AbstractCegarLoop]: Abstraction has 421 states and 567 transitions. [2022-12-14 12:07:09,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-12-14 12:07:09,728 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 567 transitions. [2022-12-14 12:07:09,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-12-14 12:07:09,728 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:07:09,729 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:07:09,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-14 12:07:09,729 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:07:09,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:07:09,729 INFO L85 PathProgramCache]: Analyzing trace with hash -1987249783, now seen corresponding path program 1 times [2022-12-14 12:07:09,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:07:09,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43326683] [2022-12-14 12:07:09,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:07:09,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:07:09,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:07:09,771 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-14 12:07:09,771 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:07:09,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43326683] [2022-12-14 12:07:09,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43326683] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:07:09,772 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:07:09,772 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 12:07:09,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486394847] [2022-12-14 12:07:09,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:07:09,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 12:07:09,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:07:09,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 12:07:09,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 12:07:09,773 INFO L87 Difference]: Start difference. First operand 421 states and 567 transitions. Second operand has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-14 12:07:09,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:07:09,949 INFO L93 Difference]: Finished difference Result 457 states and 608 transitions. [2022-12-14 12:07:09,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 12:07:09,950 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 47 [2022-12-14 12:07:09,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:07:09,952 INFO L225 Difference]: With dead ends: 457 [2022-12-14 12:07:09,952 INFO L226 Difference]: Without dead ends: 454 [2022-12-14 12:07:09,952 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 12:07:09,953 INFO L413 NwaCegarLoop]: 267 mSDtfsCounter, 496 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 496 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:07:09,954 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [496 Valid, 306 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:07:09,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2022-12-14 12:07:09,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 420. [2022-12-14 12:07:09,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 420 states, 346 states have (on average 1.3497109826589595) internal successors, (467), 351 states have internal predecessors, (467), 50 states have call successors, (50), 24 states have call predecessors, (50), 22 states have return successors, (47), 45 states have call predecessors, (47), 47 states have call successors, (47) [2022-12-14 12:07:09,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 564 transitions. [2022-12-14 12:07:09,985 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 564 transitions. Word has length 47 [2022-12-14 12:07:09,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:07:09,985 INFO L495 AbstractCegarLoop]: Abstraction has 420 states and 564 transitions. [2022-12-14 12:07:09,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-14 12:07:09,986 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 564 transitions. [2022-12-14 12:07:09,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-12-14 12:07:09,987 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:07:09,987 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:07:09,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-14 12:07:09,987 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:07:09,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:07:09,987 INFO L85 PathProgramCache]: Analyzing trace with hash -1476401916, now seen corresponding path program 1 times [2022-12-14 12:07:09,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:07:09,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827859444] [2022-12-14 12:07:09,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:07:09,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:07:10,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:07:10,087 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-14 12:07:10,088 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:07:10,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827859444] [2022-12-14 12:07:10,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827859444] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:07:10,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284041956] [2022-12-14 12:07:10,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:07:10,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:07:10,088 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_499cefbd-39e4-4716-939a-318b8ab7546b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:07:10,089 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_499cefbd-39e4-4716-939a-318b8ab7546b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:07:10,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_499cefbd-39e4-4716-939a-318b8ab7546b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 12:07:10,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:07:10,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 12:07:10,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:07:10,427 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:07:10,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:07:10,552 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-14 12:07:10,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284041956] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:07:10,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [778098043] [2022-12-14 12:07:10,572 INFO L159 IcfgInterpreter]: Started Sifa with 40 locations of interest [2022-12-14 12:07:10,572 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:07:10,575 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:07:10,580 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:07:10,580 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:07:13,884 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 155 for LOIs [2022-12-14 12:07:13,899 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 170 for LOIs [2022-12-14 12:07:13,916 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify_threads with input of size 356 for LOIs [2022-12-14 12:07:16,164 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:07:33,900 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9522#(and (= ~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) (= ~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) (<= ~p_num_write~0 1) (= ~m_i~0 0) (= 0 ~t9_pc~0) (not (= ~c_num_read~0 ~p_num_write~0)) (<= 0 (+ ~q_buf_0~0 2147483648)) (= ~p_dw_pc~0 1) (= ~q_write_ev~0 2) (= ~E_2~0 2) (= ~p_dw_st~0 0) (= ~c_last_read~0 ~q_buf_0~0) (= ~T3_E~0 2) (= ~local~0 0) (= ~t3_i~0 0) (= 0 ~t7_st~0) (= ~t8_i~0 0) (= ~token~0 0) (= ~q_read_ev~0 2) (= ~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) (<= ~p_last_write~0 2147483647) (= ~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) (= ~t1_i~0 0) (= |#NULL.base| 0))' at error location [2022-12-14 12:07:33,900 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:07:33,900 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:07:33,900 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 7 [2022-12-14 12:07:33,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679083088] [2022-12-14 12:07:33,901 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:07:33,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 12:07:33,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:07:33,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 12:07:33,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1072, Unknown=0, NotChecked=0, Total=1190 [2022-12-14 12:07:33,902 INFO L87 Difference]: Start difference. First operand 420 states and 564 transitions. Second operand has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 6 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-12-14 12:07:34,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:07:34,190 INFO L93 Difference]: Finished difference Result 821 states and 1062 transitions. [2022-12-14 12:07:34,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 12:07:34,191 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 6 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 48 [2022-12-14 12:07:34,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:07:34,193 INFO L225 Difference]: With dead ends: 821 [2022-12-14 12:07:34,193 INFO L226 Difference]: Without dead ends: 818 [2022-12-14 12:07:34,194 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 110 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 17.7s TimeCoverageRelationStatistics Valid=118, Invalid=1072, Unknown=0, NotChecked=0, Total=1190 [2022-12-14 12:07:34,194 INFO L413 NwaCegarLoop]: 317 mSDtfsCounter, 409 mSDsluCounter, 626 mSDsCounter, 0 mSdLazyCounter, 370 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 409 SdHoareTripleChecker+Valid, 943 SdHoareTripleChecker+Invalid, 376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 12:07:34,195 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [409 Valid, 943 Invalid, 376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 370 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 12:07:34,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 818 states. [2022-12-14 12:07:34,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 818 to 619. [2022-12-14 12:07:34,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 619 states, 513 states have (on average 1.3216374269005848) internal successors, (678), 520 states have internal predecessors, (678), 69 states have call successors, (69), 37 states have call predecessors, (69), 35 states have return successors, (66), 62 states have call predecessors, (66), 66 states have call successors, (66) [2022-12-14 12:07:34,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 619 states to 619 states and 813 transitions. [2022-12-14 12:07:34,225 INFO L78 Accepts]: Start accepts. Automaton has 619 states and 813 transitions. Word has length 48 [2022-12-14 12:07:34,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:07:34,225 INFO L495 AbstractCegarLoop]: Abstraction has 619 states and 813 transitions. [2022-12-14 12:07:34,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 6 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-12-14 12:07:34,225 INFO L276 IsEmpty]: Start isEmpty. Operand 619 states and 813 transitions. [2022-12-14 12:07:34,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-12-14 12:07:34,226 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:07:34,226 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:07:34,233 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_499cefbd-39e4-4716-939a-318b8ab7546b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 12:07:34,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_499cefbd-39e4-4716-939a-318b8ab7546b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:07:34,427 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:07:34,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:07:34,427 INFO L85 PathProgramCache]: Analyzing trace with hash -1082185700, now seen corresponding path program 1 times [2022-12-14 12:07:34,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:07:34,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353453965] [2022-12-14 12:07:34,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:07:34,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:07:34,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:07:34,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:07:34,489 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:07:34,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353453965] [2022-12-14 12:07:34,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353453965] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:07:34,490 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:07:34,490 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 12:07:34,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132726912] [2022-12-14 12:07:34,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:07:34,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 12:07:34,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:07:34,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 12:07:34,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 12:07:34,491 INFO L87 Difference]: Start difference. First operand 619 states and 813 transitions. Second operand has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 12:07:34,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:07:34,738 INFO L93 Difference]: Finished difference Result 913 states and 1286 transitions. [2022-12-14 12:07:34,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 12:07:34,738 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 59 [2022-12-14 12:07:34,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:07:34,741 INFO L225 Difference]: With dead ends: 913 [2022-12-14 12:07:34,742 INFO L226 Difference]: Without dead ends: 760 [2022-12-14 12:07:34,743 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 12:07:34,743 INFO L413 NwaCegarLoop]: 425 mSDtfsCounter, 476 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 476 SdHoareTripleChecker+Valid, 753 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 12:07:34,744 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [476 Valid, 753 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 12:07:34,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 760 states. [2022-12-14 12:07:34,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 760 to 759. [2022-12-14 12:07:34,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 759 states, 628 states have (on average 1.3503184713375795) internal successors, (848), 636 states have internal predecessors, (848), 88 states have call successors, (88), 43 states have call predecessors, (88), 41 states have return successors, (85), 80 states have call predecessors, (85), 85 states have call successors, (85) [2022-12-14 12:07:34,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 759 states to 759 states and 1021 transitions. [2022-12-14 12:07:34,812 INFO L78 Accepts]: Start accepts. Automaton has 759 states and 1021 transitions. Word has length 59 [2022-12-14 12:07:34,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:07:34,812 INFO L495 AbstractCegarLoop]: Abstraction has 759 states and 1021 transitions. [2022-12-14 12:07:34,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-12-14 12:07:34,813 INFO L276 IsEmpty]: Start isEmpty. Operand 759 states and 1021 transitions. [2022-12-14 12:07:34,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-12-14 12:07:34,814 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:07:34,814 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:07:34,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-14 12:07:34,815 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:07:34,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:07:34,815 INFO L85 PathProgramCache]: Analyzing trace with hash 1251925499, now seen corresponding path program 2 times [2022-12-14 12:07:34,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:07:34,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438327610] [2022-12-14 12:07:34,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:07:34,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:07:34,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:07:34,852 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-12-14 12:07:34,852 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:07:34,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438327610] [2022-12-14 12:07:34,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438327610] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:07:34,853 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:07:34,853 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 12:07:34,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016571931] [2022-12-14 12:07:34,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:07:34,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 12:07:34,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:07:34,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 12:07:34,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 12:07:34,854 INFO L87 Difference]: Start difference. First operand 759 states and 1021 transitions. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-12-14 12:07:34,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:07:34,941 INFO L93 Difference]: Finished difference Result 1065 states and 1406 transitions. [2022-12-14 12:07:34,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 12:07:34,942 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 61 [2022-12-14 12:07:34,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:07:34,944 INFO L225 Difference]: With dead ends: 1065 [2022-12-14 12:07:34,944 INFO L226 Difference]: Without dead ends: 703 [2022-12-14 12:07:34,945 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 12:07:34,945 INFO L413 NwaCegarLoop]: 278 mSDtfsCounter, 284 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:07:34,946 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [284 Valid, 321 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:07:34,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 703 states. [2022-12-14 12:07:34,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 703 to 700. [2022-12-14 12:07:34,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 700 states, 579 states have (on average 1.3436960276338514) internal successors, (778), 588 states have internal predecessors, (778), 82 states have call successors, (82), 39 states have call predecessors, (82), 37 states have return successors, (79), 73 states have call predecessors, (79), 79 states have call successors, (79) [2022-12-14 12:07:34,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 700 states to 700 states and 939 transitions. [2022-12-14 12:07:34,982 INFO L78 Accepts]: Start accepts. Automaton has 700 states and 939 transitions. Word has length 61 [2022-12-14 12:07:34,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:07:34,983 INFO L495 AbstractCegarLoop]: Abstraction has 700 states and 939 transitions. [2022-12-14 12:07:34,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-12-14 12:07:34,983 INFO L276 IsEmpty]: Start isEmpty. Operand 700 states and 939 transitions. [2022-12-14 12:07:34,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-12-14 12:07:34,984 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:07:34,985 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:07:34,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-14 12:07:34,985 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:07:34,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:07:34,985 INFO L85 PathProgramCache]: Analyzing trace with hash -936781874, now seen corresponding path program 1 times [2022-12-14 12:07:34,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:07:34,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540488586] [2022-12-14 12:07:34,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:07:34,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:07:34,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:07:35,091 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 16 proven. 14 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 12:07:35,091 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:07:35,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540488586] [2022-12-14 12:07:35,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540488586] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:07:35,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838322402] [2022-12-14 12:07:35,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:07:35,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:07:35,092 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_499cefbd-39e4-4716-939a-318b8ab7546b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:07:35,092 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_499cefbd-39e4-4716-939a-318b8ab7546b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:07:35,093 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_499cefbd-39e4-4716-939a-318b8ab7546b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 12:07:35,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:07:35,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 12:07:35,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:07:35,183 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 12:07:35,183 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 12:07:35,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [838322402] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:07:35,184 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 12:07:35,184 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-12-14 12:07:35,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229053808] [2022-12-14 12:07:35,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:07:35,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 12:07:35,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:07:35,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 12:07:35,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 12:07:35,185 INFO L87 Difference]: Start difference. First operand 700 states and 939 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-12-14 12:07:35,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:07:35,292 INFO L93 Difference]: Finished difference Result 794 states and 1053 transitions. [2022-12-14 12:07:35,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 12:07:35,293 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 73 [2022-12-14 12:07:35,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:07:35,294 INFO L225 Difference]: With dead ends: 794 [2022-12-14 12:07:35,294 INFO L226 Difference]: Without dead ends: 299 [2022-12-14 12:07:35,295 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-14 12:07:35,295 INFO L413 NwaCegarLoop]: 270 mSDtfsCounter, 24 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 513 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:07:35,296 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 513 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:07:35,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2022-12-14 12:07:35,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 299. [2022-12-14 12:07:35,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 242 states have (on average 1.5) internal successors, (363), 245 states have internal predecessors, (363), 44 states have call successors, (44), 13 states have call predecessors, (44), 12 states have return successors, (42), 41 states have call predecessors, (42), 42 states have call successors, (42) [2022-12-14 12:07:35,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 449 transitions. [2022-12-14 12:07:35,312 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 449 transitions. Word has length 73 [2022-12-14 12:07:35,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:07:35,312 INFO L495 AbstractCegarLoop]: Abstraction has 299 states and 449 transitions. [2022-12-14 12:07:35,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-12-14 12:07:35,312 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 449 transitions. [2022-12-14 12:07:35,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-12-14 12:07:35,313 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:07:35,313 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, 1] [2022-12-14 12:07:35,319 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_499cefbd-39e4-4716-939a-318b8ab7546b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 12:07:35,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_499cefbd-39e4-4716-939a-318b8ab7546b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-12-14 12:07:35,514 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:07:35,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:07:35,514 INFO L85 PathProgramCache]: Analyzing trace with hash -66277764, now seen corresponding path program 1 times [2022-12-14 12:07:35,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:07:35,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018609508] [2022-12-14 12:07:35,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:07:35,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:07:35,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:07:35,610 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 12:07:35,610 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:07:35,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018609508] [2022-12-14 12:07:35,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018609508] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:07:35,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520559111] [2022-12-14 12:07:35,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:07:35,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:07:35,611 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_499cefbd-39e4-4716-939a-318b8ab7546b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:07:35,612 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_499cefbd-39e4-4716-939a-318b8ab7546b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:07:35,612 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_499cefbd-39e4-4716-939a-318b8ab7546b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 12:07:35,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:07:35,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 849 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 12:07:35,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:07:35,803 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 12:07:35,803 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 12:07:35,803 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520559111] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:07:35,803 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 12:07:35,803 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 12:07:35,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17802214] [2022-12-14 12:07:35,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:07:35,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 12:07:35,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:07:35,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 12:07:35,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 12:07:35,805 INFO L87 Difference]: Start difference. First operand 299 states and 449 transitions. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 2 states have internal predecessors, (91), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 12:07:35,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:07:35,928 INFO L93 Difference]: Finished difference Result 878 states and 1342 transitions. [2022-12-14 12:07:35,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 12:07:35,929 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 2 states have internal predecessors, (91), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 116 [2022-12-14 12:07:35,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:07:35,931 INFO L225 Difference]: With dead ends: 878 [2022-12-14 12:07:35,931 INFO L226 Difference]: Without dead ends: 585 [2022-12-14 12:07:35,932 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 12:07:35,933 INFO L413 NwaCegarLoop]: 251 mSDtfsCounter, 194 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 438 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:07:35,933 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [194 Valid, 438 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:07:35,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2022-12-14 12:07:35,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 579. [2022-12-14 12:07:35,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 579 states, 474 states have (on average 1.4978902953586497) internal successors, (710), 478 states have internal predecessors, (710), 80 states have call successors, (80), 25 states have call predecessors, (80), 24 states have return successors, (78), 76 states have call predecessors, (78), 78 states have call successors, (78) [2022-12-14 12:07:35,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 579 states to 579 states and 868 transitions. [2022-12-14 12:07:35,962 INFO L78 Accepts]: Start accepts. Automaton has 579 states and 868 transitions. Word has length 116 [2022-12-14 12:07:35,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:07:35,963 INFO L495 AbstractCegarLoop]: Abstraction has 579 states and 868 transitions. [2022-12-14 12:07:35,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 2 states have internal predecessors, (91), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 12:07:35,963 INFO L276 IsEmpty]: Start isEmpty. Operand 579 states and 868 transitions. [2022-12-14 12:07:35,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-12-14 12:07:35,965 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:07:35,965 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, 1] [2022-12-14 12:07:35,970 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_499cefbd-39e4-4716-939a-318b8ab7546b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 12:07:36,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_499cefbd-39e4-4716-939a-318b8ab7546b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-12-14 12:07:36,165 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:07:36,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:07:36,166 INFO L85 PathProgramCache]: Analyzing trace with hash -1400574662, now seen corresponding path program 1 times [2022-12-14 12:07:36,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:07:36,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052267877] [2022-12-14 12:07:36,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:07:36,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:07:36,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:07:36,294 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 12:07:36,294 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:07:36,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052267877] [2022-12-14 12:07:36,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052267877] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:07:36,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647467133] [2022-12-14 12:07:36,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:07:36,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:07:36,295 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_499cefbd-39e4-4716-939a-318b8ab7546b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:07:36,296 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_499cefbd-39e4-4716-939a-318b8ab7546b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:07:36,297 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_499cefbd-39e4-4716-939a-318b8ab7546b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 12:07:36,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:07:36,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 843 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 12:07:36,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:07:36,484 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-14 12:07:36,484 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 12:07:36,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [647467133] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:07:36,485 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 12:07:36,485 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 12:07:36,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286224999] [2022-12-14 12:07:36,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:07:36,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 12:07:36,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:07:36,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 12:07:36,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 12:07:36,486 INFO L87 Difference]: Start difference. First operand 579 states and 868 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 2 states have internal predecessors, (79), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 12:07:36,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:07:36,641 INFO L93 Difference]: Finished difference Result 1712 states and 2611 transitions. [2022-12-14 12:07:36,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 12:07:36,641 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 2 states have internal predecessors, (79), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 116 [2022-12-14 12:07:36,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:07:36,645 INFO L225 Difference]: With dead ends: 1712 [2022-12-14 12:07:36,645 INFO L226 Difference]: Without dead ends: 1139 [2022-12-14 12:07:36,646 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 12:07:36,647 INFO L413 NwaCegarLoop]: 239 mSDtfsCounter, 206 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 426 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:07:36,647 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [206 Valid, 426 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:07:36,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1139 states. [2022-12-14 12:07:36,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1139 to 1131. [2022-12-14 12:07:36,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1131 states, 932 states have (on average 1.4935622317596566) internal successors, (1392), 938 states have internal predecessors, (1392), 150 states have call successors, (150), 49 states have call predecessors, (150), 48 states have return successors, (148), 144 states have call predecessors, (148), 148 states have call successors, (148) [2022-12-14 12:07:36,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1131 states to 1131 states and 1690 transitions. [2022-12-14 12:07:36,717 INFO L78 Accepts]: Start accepts. Automaton has 1131 states and 1690 transitions. Word has length 116 [2022-12-14 12:07:36,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:07:36,717 INFO L495 AbstractCegarLoop]: Abstraction has 1131 states and 1690 transitions. [2022-12-14 12:07:36,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 2 states have internal predecessors, (79), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 12:07:36,718 INFO L276 IsEmpty]: Start isEmpty. Operand 1131 states and 1690 transitions. [2022-12-14 12:07:36,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-12-14 12:07:36,721 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:07:36,721 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, 1] [2022-12-14 12:07:36,728 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_499cefbd-39e4-4716-939a-318b8ab7546b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 12:07:36,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_499cefbd-39e4-4716-939a-318b8ab7546b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-12-14 12:07:36,922 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:07:36,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:07:36,922 INFO L85 PathProgramCache]: Analyzing trace with hash 701431544, now seen corresponding path program 1 times [2022-12-14 12:07:36,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:07:36,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711130832] [2022-12-14 12:07:36,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:07:36,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:07:36,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:07:37,041 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 12:07:37,041 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:07:37,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711130832] [2022-12-14 12:07:37,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711130832] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:07:37,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278904891] [2022-12-14 12:07:37,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:07:37,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:07:37,042 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_499cefbd-39e4-4716-939a-318b8ab7546b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:07:37,043 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_499cefbd-39e4-4716-939a-318b8ab7546b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:07:37,043 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_499cefbd-39e4-4716-939a-318b8ab7546b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 12:07:37,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:07:37,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 837 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 12:07:37,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:07:37,203 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-12-14 12:07:37,204 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 12:07:37,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278904891] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:07:37,204 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 12:07:37,204 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 12:07:37,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954278896] [2022-12-14 12:07:37,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:07:37,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 12:07:37,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:07:37,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 12:07:37,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 12:07:37,205 INFO L87 Difference]: Start difference. First operand 1131 states and 1690 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, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 12:07:37,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:07:37,375 INFO L93 Difference]: Finished difference Result 3356 states and 5099 transitions. [2022-12-14 12:07:37,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 12:07:37,376 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, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 116 [2022-12-14 12:07:37,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:07:37,382 INFO L225 Difference]: With dead ends: 3356 [2022-12-14 12:07:37,382 INFO L226 Difference]: Without dead ends: 2231 [2022-12-14 12:07:37,385 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 12:07:37,385 INFO L413 NwaCegarLoop]: 249 mSDtfsCounter, 209 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:07:37,385 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 436 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:07:37,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2231 states. [2022-12-14 12:07:37,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2231 to 2219. [2022-12-14 12:07:37,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2219 states, 1836 states have (on average 1.4880174291938997) internal successors, (2732), 1846 states have internal predecessors, (2732), 286 states have call successors, (286), 97 states have call predecessors, (286), 96 states have return successors, (284), 276 states have call predecessors, (284), 284 states have call successors, (284) [2022-12-14 12:07:37,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2219 states to 2219 states and 3302 transitions. [2022-12-14 12:07:37,496 INFO L78 Accepts]: Start accepts. Automaton has 2219 states and 3302 transitions. Word has length 116 [2022-12-14 12:07:37,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:07:37,496 INFO L495 AbstractCegarLoop]: Abstraction has 2219 states and 3302 transitions. [2022-12-14 12:07:37,497 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, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 12:07:37,497 INFO L276 IsEmpty]: Start isEmpty. Operand 2219 states and 3302 transitions. [2022-12-14 12:07:37,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-12-14 12:07:37,499 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:07:37,499 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, 1] [2022-12-14 12:07:37,506 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_499cefbd-39e4-4716-939a-318b8ab7546b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 12:07:37,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_499cefbd-39e4-4716-939a-318b8ab7546b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-14 12:07:37,700 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:07:37,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:07:37,700 INFO L85 PathProgramCache]: Analyzing trace with hash 945138810, now seen corresponding path program 1 times [2022-12-14 12:07:37,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:07:37,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126724252] [2022-12-14 12:07:37,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:07:37,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:07:37,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:07:37,819 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 12:07:37,820 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:07:37,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126724252] [2022-12-14 12:07:37,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126724252] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:07:37,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53710569] [2022-12-14 12:07:37,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:07:37,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:07:37,820 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_499cefbd-39e4-4716-939a-318b8ab7546b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:07:37,821 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_499cefbd-39e4-4716-939a-318b8ab7546b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:07:37,822 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_499cefbd-39e4-4716-939a-318b8ab7546b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 12:07:37,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:07:37,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 831 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 12:07:37,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:07:37,981 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-12-14 12:07:37,981 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 12:07:37,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [53710569] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:07:37,981 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 12:07:37,981 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 12:07:37,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984677516] [2022-12-14 12:07:37,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:07:37,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 12:07:37,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:07:37,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 12:07:37,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 12:07:37,983 INFO L87 Difference]: Start difference. First operand 2219 states and 3302 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 2 states have internal predecessors, (70), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 12:07:38,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:07:38,254 INFO L93 Difference]: Finished difference Result 6596 states and 9975 transitions. [2022-12-14 12:07:38,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 12:07:38,254 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 2 states have internal predecessors, (70), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 116 [2022-12-14 12:07:38,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:07:38,266 INFO L225 Difference]: With dead ends: 6596 [2022-12-14 12:07:38,266 INFO L226 Difference]: Without dead ends: 4383 [2022-12-14 12:07:38,272 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 12:07:38,272 INFO L413 NwaCegarLoop]: 237 mSDtfsCounter, 215 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 424 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:07:38,272 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [215 Valid, 424 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:07:38,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4383 states. [2022-12-14 12:07:38,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4383 to 4363. [2022-12-14 12:07:38,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4363 states, 3620 states have (on average 1.481767955801105) internal successors, (5364), 3638 states have internal predecessors, (5364), 550 states have call successors, (550), 193 states have call predecessors, (550), 192 states have return successors, (548), 532 states have call predecessors, (548), 548 states have call successors, (548) [2022-12-14 12:07:38,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4363 states to 4363 states and 6462 transitions. [2022-12-14 12:07:38,536 INFO L78 Accepts]: Start accepts. Automaton has 4363 states and 6462 transitions. Word has length 116 [2022-12-14 12:07:38,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:07:38,536 INFO L495 AbstractCegarLoop]: Abstraction has 4363 states and 6462 transitions. [2022-12-14 12:07:38,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 2 states have internal predecessors, (70), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 12:07:38,537 INFO L276 IsEmpty]: Start isEmpty. Operand 4363 states and 6462 transitions. [2022-12-14 12:07:38,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-12-14 12:07:38,545 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:07:38,545 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, 1] [2022-12-14 12:07:38,551 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_499cefbd-39e4-4716-939a-318b8ab7546b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 12:07:38,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_499cefbd-39e4-4716-939a-318b8ab7546b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-14 12:07:38,747 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:07:38,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:07:38,747 INFO L85 PathProgramCache]: Analyzing trace with hash 1028698236, now seen corresponding path program 1 times [2022-12-14 12:07:38,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:07:38,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483538341] [2022-12-14 12:07:38,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:07:38,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:07:38,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:07:38,860 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 12:07:38,860 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:07:38,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483538341] [2022-12-14 12:07:38,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483538341] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:07:38,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468013198] [2022-12-14 12:07:38,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:07:38,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:07:38,861 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_499cefbd-39e4-4716-939a-318b8ab7546b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:07:38,861 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_499cefbd-39e4-4716-939a-318b8ab7546b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:07:38,862 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_499cefbd-39e4-4716-939a-318b8ab7546b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 12:07:38,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:07:38,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 825 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 12:07:38,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:07:39,025 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-14 12:07:39,026 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 12:07:39,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1468013198] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:07:39,026 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 12:07:39,026 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-12-14 12:07:39,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367539326] [2022-12-14 12:07:39,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:07:39,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 12:07:39,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:07:39,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 12:07:39,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 12:07:39,027 INFO L87 Difference]: Start difference. First operand 4363 states and 6462 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 12:07:39,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:07:39,551 INFO L93 Difference]: Finished difference Result 12980 states and 19527 transitions. [2022-12-14 12:07:39,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 12:07:39,551 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 116 [2022-12-14 12:07:39,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:07:39,575 INFO L225 Difference]: With dead ends: 12980 [2022-12-14 12:07:39,575 INFO L226 Difference]: Without dead ends: 8623 [2022-12-14 12:07:39,582 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-14 12:07:39,583 INFO L413 NwaCegarLoop]: 214 mSDtfsCounter, 200 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 401 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:07:39,583 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [200 Valid, 401 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:07:39,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8623 states. [2022-12-14 12:07:40,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8623 to 8587. [2022-12-14 12:07:40,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8587 states, 7140 states have (on average 1.4750700280112046) internal successors, (10532), 7174 states have internal predecessors, (10532), 1062 states have call successors, (1062), 385 states have call predecessors, (1062), 384 states have return successors, (1060), 1028 states have call predecessors, (1060), 1060 states have call successors, (1060) [2022-12-14 12:07:40,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8587 states to 8587 states and 12654 transitions. [2022-12-14 12:07:40,033 INFO L78 Accepts]: Start accepts. Automaton has 8587 states and 12654 transitions. Word has length 116 [2022-12-14 12:07:40,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:07:40,034 INFO L495 AbstractCegarLoop]: Abstraction has 8587 states and 12654 transitions. [2022-12-14 12:07:40,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-12-14 12:07:40,034 INFO L276 IsEmpty]: Start isEmpty. Operand 8587 states and 12654 transitions. [2022-12-14 12:07:40,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-12-14 12:07:40,042 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:07:40,042 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, 1] [2022-12-14 12:07:40,048 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_499cefbd-39e4-4716-939a-318b8ab7546b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 12:07:40,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_499cefbd-39e4-4716-939a-318b8ab7546b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:07:40,243 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:07:40,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:07:40,243 INFO L85 PathProgramCache]: Analyzing trace with hash -1191024454, now seen corresponding path program 1 times [2022-12-14 12:07:40,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:07:40,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117226169] [2022-12-14 12:07:40,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:07:40,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:07:40,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:07:40,322 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-12-14 12:07:40,322 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:07:40,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117226169] [2022-12-14 12:07:40,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117226169] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:07:40,323 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:07:40,323 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 12:07:40,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456904737] [2022-12-14 12:07:40,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:07:40,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 12:07:40,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:07:40,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 12:07:40,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 12:07:40,324 INFO L87 Difference]: Start difference. First operand 8587 states and 12654 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-12-14 12:07:40,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:07:40,987 INFO L93 Difference]: Finished difference Result 15279 states and 22897 transitions. [2022-12-14 12:07:40,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 12:07:40,987 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), 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 116 [2022-12-14 12:07:40,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:07:41,021 INFO L225 Difference]: With dead ends: 15279 [2022-12-14 12:07:41,021 INFO L226 Difference]: Without dead ends: 10859 [2022-12-14 12:07:41,028 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 12:07:41,029 INFO L413 NwaCegarLoop]: 300 mSDtfsCounter, 100 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 506 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:07:41,029 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 506 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:07:41,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10859 states. [2022-12-14 12:07:41,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10859 to 10171. [2022-12-14 12:07:41,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10171 states, 8660 states have (on average 1.5191685912240185) internal successors, (13156), 8694 states have internal predecessors, (13156), 1094 states have call successors, (1094), 417 states have call predecessors, (1094), 416 states have return successors, (1092), 1060 states have call predecessors, (1092), 1092 states have call successors, (1092) [2022-12-14 12:07:41,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10171 states to 10171 states and 15342 transitions. [2022-12-14 12:07:41,684 INFO L78 Accepts]: Start accepts. Automaton has 10171 states and 15342 transitions. Word has length 116 [2022-12-14 12:07:41,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:07:41,685 INFO L495 AbstractCegarLoop]: Abstraction has 10171 states and 15342 transitions. [2022-12-14 12:07:41,685 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), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-12-14 12:07:41,685 INFO L276 IsEmpty]: Start isEmpty. Operand 10171 states and 15342 transitions. [2022-12-14 12:07:41,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-12-14 12:07:41,704 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:07:41,705 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, 1] [2022-12-14 12:07:41,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-12-14 12:07:41,705 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:07:41,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:07:41,705 INFO L85 PathProgramCache]: Analyzing trace with hash -1941408093, now seen corresponding path program 1 times [2022-12-14 12:07:41,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:07:41,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585189811] [2022-12-14 12:07:41,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:07:41,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:07:41,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:07:41,785 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2022-12-14 12:07:41,785 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:07:41,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585189811] [2022-12-14 12:07:41,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585189811] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:07:41,786 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:07:41,786 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 12:07:41,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507861843] [2022-12-14 12:07:41,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:07:41,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 12:07:41,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:07:41,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 12:07:41,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 12:07:41,787 INFO L87 Difference]: Start difference. First operand 10171 states and 15342 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, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 12:07:42,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:07:42,958 INFO L93 Difference]: Finished difference Result 30212 states and 46103 transitions. [2022-12-14 12:07:42,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 12:07:42,959 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, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 157 [2022-12-14 12:07:42,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:07:43,004 INFO L225 Difference]: With dead ends: 30212 [2022-12-14 12:07:43,004 INFO L226 Difference]: Without dead ends: 20047 [2022-12-14 12:07:43,022 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 12:07:43,022 INFO L413 NwaCegarLoop]: 216 mSDtfsCounter, 202 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 403 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:07:43,022 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [202 Valid, 403 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:07:43,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20047 states. [2022-12-14 12:07:44,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20047 to 19947. [2022-12-14 12:07:44,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19947 states, 16996 states have (on average 1.5102377029889387) internal successors, (25668), 17062 states have internal predecessors, (25668), 2118 states have call successors, (2118), 833 states have call predecessors, (2118), 832 states have return successors, (2116), 2052 states have call predecessors, (2116), 2116 states have call successors, (2116) [2022-12-14 12:07:44,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19947 states to 19947 states and 29902 transitions. [2022-12-14 12:07:44,471 INFO L78 Accepts]: Start accepts. Automaton has 19947 states and 29902 transitions. Word has length 157 [2022-12-14 12:07:44,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:07:44,471 INFO L495 AbstractCegarLoop]: Abstraction has 19947 states and 29902 transitions. [2022-12-14 12:07:44,471 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, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 12:07:44,471 INFO L276 IsEmpty]: Start isEmpty. Operand 19947 states and 29902 transitions. [2022-12-14 12:07:44,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-12-14 12:07:44,505 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:07:44,506 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, 1] [2022-12-14 12:07:44,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-12-14 12:07:44,506 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:07:44,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:07:44,506 INFO L85 PathProgramCache]: Analyzing trace with hash -113832898, now seen corresponding path program 1 times [2022-12-14 12:07:44,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:07:44,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354644891] [2022-12-14 12:07:44,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:07:44,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:07:44,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:07:44,583 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2022-12-14 12:07:44,583 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:07:44,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354644891] [2022-12-14 12:07:44,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354644891] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:07:44,583 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:07:44,584 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 12:07:44,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15809983] [2022-12-14 12:07:44,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:07:44,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 12:07:44,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:07:44,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 12:07:44,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 12:07:44,585 INFO L87 Difference]: Start difference. First operand 19947 states and 29902 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, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 12:07:46,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:07:46,603 INFO L93 Difference]: Finished difference Result 59252 states and 89815 transitions. [2022-12-14 12:07:46,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 12:07:46,604 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, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 157 [2022-12-14 12:07:46,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:07:46,688 INFO L225 Difference]: With dead ends: 59252 [2022-12-14 12:07:46,689 INFO L226 Difference]: Without dead ends: 39311 [2022-12-14 12:07:46,722 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 12:07:46,723 INFO L413 NwaCegarLoop]: 216 mSDtfsCounter, 204 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 403 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:07:46,723 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [204 Valid, 403 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:07:46,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39311 states. [2022-12-14 12:07:49,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39311 to 39115. [2022-12-14 12:07:49,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39115 states, 33348 states have (on average 1.5008996041741633) internal successors, (50052), 33478 states have internal predecessors, (50052), 4102 states have call successors, (4102), 1665 states have call predecessors, (4102), 1664 states have return successors, (4100), 3972 states have call predecessors, (4100), 4100 states have call successors, (4100) [2022-12-14 12:07:49,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39115 states to 39115 states and 58254 transitions. [2022-12-14 12:07:49,443 INFO L78 Accepts]: Start accepts. Automaton has 39115 states and 58254 transitions. Word has length 157 [2022-12-14 12:07:49,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:07:49,443 INFO L495 AbstractCegarLoop]: Abstraction has 39115 states and 58254 transitions. [2022-12-14 12:07:49,443 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, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 12:07:49,443 INFO L276 IsEmpty]: Start isEmpty. Operand 39115 states and 58254 transitions. [2022-12-14 12:07:49,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-12-14 12:07:49,495 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:07:49,495 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, 1] [2022-12-14 12:07:49,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-12-14 12:07:49,495 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:07:49,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:07:49,496 INFO L85 PathProgramCache]: Analyzing trace with hash 647833580, now seen corresponding path program 1 times [2022-12-14 12:07:49,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:07:49,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289939368] [2022-12-14 12:07:49,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:07:49,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:07:49,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:07:49,550 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2022-12-14 12:07:49,550 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:07:49,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289939368] [2022-12-14 12:07:49,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289939368] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:07:49,550 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:07:49,550 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 12:07:49,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318794538] [2022-12-14 12:07:49,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:07:49,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 12:07:49,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:07:49,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 12:07:49,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 12:07:49,552 INFO L87 Difference]: Start difference. First operand 39115 states and 58254 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, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 12:07:53,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:07:53,519 INFO L93 Difference]: Finished difference Result 116180 states and 174871 transitions. [2022-12-14 12:07:53,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 12:07:53,520 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, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 157 [2022-12-14 12:07:53,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:07:53,734 INFO L225 Difference]: With dead ends: 116180 [2022-12-14 12:07:53,734 INFO L226 Difference]: Without dead ends: 77071 [2022-12-14 12:07:53,819 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 12:07:53,820 INFO L413 NwaCegarLoop]: 234 mSDtfsCounter, 207 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 421 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:07:53,820 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 421 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:07:53,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77071 states. [2022-12-14 12:07:58,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77071 to 76683. [2022-12-14 12:07:58,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76683 states, 65412 states have (on average 1.491163700849997) internal successors, (97540), 65670 states have internal predecessors, (97540), 7942 states have call successors, (7942), 3329 states have call predecessors, (7942), 3328 states have return successors, (7940), 7684 states have call predecessors, (7940), 7940 states have call successors, (7940) [2022-12-14 12:07:58,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76683 states to 76683 states and 113422 transitions. [2022-12-14 12:07:58,436 INFO L78 Accepts]: Start accepts. Automaton has 76683 states and 113422 transitions. Word has length 157 [2022-12-14 12:07:58,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:07:58,436 INFO L495 AbstractCegarLoop]: Abstraction has 76683 states and 113422 transitions. [2022-12-14 12:07:58,436 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, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 12:07:58,436 INFO L276 IsEmpty]: Start isEmpty. Operand 76683 states and 113422 transitions. [2022-12-14 12:07:58,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-12-14 12:07:58,546 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:07:58,546 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, 1] [2022-12-14 12:07:58,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-12-14 12:07:58,546 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:07:58,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:07:58,547 INFO L85 PathProgramCache]: Analyzing trace with hash -1110992912, now seen corresponding path program 1 times [2022-12-14 12:07:58,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:07:58,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879591911] [2022-12-14 12:07:58,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:07:58,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:07:58,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:07:58,603 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2022-12-14 12:07:58,604 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:07:58,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879591911] [2022-12-14 12:07:58,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879591911] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:07:58,604 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:07:58,604 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 12:07:58,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435328573] [2022-12-14 12:07:58,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:07:58,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 12:07:58,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:07:58,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 12:07:58,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 12:07:58,606 INFO L87 Difference]: Start difference. First operand 76683 states and 113422 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, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 12:08:06,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:08:06,501 INFO L93 Difference]: Finished difference Result 227732 states and 340247 transitions. [2022-12-14 12:08:06,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 12:08:06,501 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, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 157 [2022-12-14 12:08:06,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:08:07,017 INFO L225 Difference]: With dead ends: 227732 [2022-12-14 12:08:07,017 INFO L226 Difference]: Without dead ends: 151055 [2022-12-14 12:08:07,141 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 12:08:07,142 INFO L413 NwaCegarLoop]: 237 mSDtfsCounter, 209 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 424 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:08:07,142 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 424 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:08:07,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151055 states. [2022-12-14 12:08:15,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151055 to 150283. [2022-12-14 12:08:15,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150283 states, 128260 states have (on average 1.481022922189303) internal successors, (189956), 128774 states have internal predecessors, (189956), 15366 states have call successors, (15366), 6657 states have call predecessors, (15366), 6656 states have return successors, (15364), 14852 states have call predecessors, (15364), 15364 states have call successors, (15364) [2022-12-14 12:08:15,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150283 states to 150283 states and 220686 transitions. [2022-12-14 12:08:15,444 INFO L78 Accepts]: Start accepts. Automaton has 150283 states and 220686 transitions. Word has length 157 [2022-12-14 12:08:15,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:08:15,445 INFO L495 AbstractCegarLoop]: Abstraction has 150283 states and 220686 transitions. [2022-12-14 12:08:15,445 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, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-14 12:08:15,445 INFO L276 IsEmpty]: Start isEmpty. Operand 150283 states and 220686 transitions. [2022-12-14 12:08:15,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-12-14 12:08:15,720 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:08:15,720 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, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:08:15,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-12-14 12:08:15,721 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:08:15,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:08:15,721 INFO L85 PathProgramCache]: Analyzing trace with hash -2092539134, now seen corresponding path program 1 times [2022-12-14 12:08:15,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:08:15,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786127539] [2022-12-14 12:08:15,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:08:15,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:08:15,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:08:16,064 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 16 proven. 63 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-12-14 12:08:16,065 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:08:16,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786127539] [2022-12-14 12:08:16,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786127539] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:08:16,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581623091] [2022-12-14 12:08:16,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:08:16,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:08:16,065 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_499cefbd-39e4-4716-939a-318b8ab7546b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:08:16,066 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_499cefbd-39e4-4716-939a-318b8ab7546b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:08:16,067 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_499cefbd-39e4-4716-939a-318b8ab7546b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 12:08:16,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:08:16,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 1084 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 12:08:16,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:08:16,268 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 98 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-12-14 12:08:16,268 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 12:08:16,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1581623091] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:08:16,268 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 12:08:16,268 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-12-14 12:08:16,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457055947] [2022-12-14 12:08:16,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:08:16,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 12:08:16,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:08:16,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 12:08:16,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 12:08:16,269 INFO L87 Difference]: Start difference. First operand 150283 states and 220686 transitions. Second operand has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 12:08:26,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:08:26,810 INFO L93 Difference]: Finished difference Result 288019 states and 427284 transitions. [2022-12-14 12:08:26,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 12:08:26,811 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 179 [2022-12-14 12:08:26,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:08:27,435 INFO L225 Difference]: With dead ends: 288019 [2022-12-14 12:08:27,435 INFO L226 Difference]: Without dead ends: 211727 [2022-12-14 12:08:27,596 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-12-14 12:08:27,596 INFO L413 NwaCegarLoop]: 344 mSDtfsCounter, 163 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 552 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:08:27,597 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [163 Valid, 552 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:08:27,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211727 states. [2022-12-14 12:08:37,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211727 to 183051. [2022-12-14 12:08:38,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183051 states, 159492 states have (on average 1.5232613548014948) internal successors, (242948), 160006 states have internal predecessors, (242948), 16134 states have call successors, (16134), 7425 states have call predecessors, (16134), 7424 states have return successors, (16132), 15620 states have call predecessors, (16132), 16132 states have call successors, (16132) [2022-12-14 12:08:38,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183051 states to 183051 states and 275214 transitions. [2022-12-14 12:08:38,506 INFO L78 Accepts]: Start accepts. Automaton has 183051 states and 275214 transitions. Word has length 179 [2022-12-14 12:08:38,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:08:38,506 INFO L495 AbstractCegarLoop]: Abstraction has 183051 states and 275214 transitions. [2022-12-14 12:08:38,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-12-14 12:08:38,506 INFO L276 IsEmpty]: Start isEmpty. Operand 183051 states and 275214 transitions. [2022-12-14 12:08:38,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-12-14 12:08:38,816 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:08:38,816 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, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:08:38,822 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_499cefbd-39e4-4716-939a-318b8ab7546b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-14 12:08:39,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_499cefbd-39e4-4716-939a-318b8ab7546b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-12-14 12:08:39,018 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:08:39,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:08:39,019 INFO L85 PathProgramCache]: Analyzing trace with hash 1593216509, now seen corresponding path program 2 times [2022-12-14 12:08:39,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:08:39,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226238214] [2022-12-14 12:08:39,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:08:39,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:08:39,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:08:39,197 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 10 proven. 61 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-12-14 12:08:39,198 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:08:39,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226238214] [2022-12-14 12:08:39,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226238214] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:08:39,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538769507] [2022-12-14 12:08:39,198 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 12:08:39,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:08:39,198 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_499cefbd-39e4-4716-939a-318b8ab7546b/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:08:39,199 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_499cefbd-39e4-4716-939a-318b8ab7546b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:08:39,200 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_499cefbd-39e4-4716-939a-318b8ab7546b/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 12:08:39,343 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 12:08:39,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:08:39,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 1035 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-14 12:08:39,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:08:39,465 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 90 proven. 22 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-14 12:08:39,465 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:08:39,746 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 23 proven. 64 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-12-14 12:08:39,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [538769507] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:08:39,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [162105156] [2022-12-14 12:08:39,751 INFO L159 IcfgInterpreter]: Started Sifa with 87 locations of interest [2022-12-14 12:08:39,751 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:08:39,751 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:08:39,751 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:08:39,751 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:11:14,607 WARN L233 SmtUtils]: Spent 17.13s on a formula simplification that was a NOOP. DAG size: 495 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2022-12-14 12:11:31,693 WARN L233 SmtUtils]: Spent 17.07s on a formula simplification that was a NOOP. DAG size: 495 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2022-12-14 12:14:01,577 WARN L233 SmtUtils]: Spent 18.89s on a formula simplification that was a NOOP. DAG size: 495 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2022-12-14 12:14:19,768 WARN L233 SmtUtils]: Spent 18.18s on a formula simplification that was a NOOP. DAG size: 495 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2022-12-14 12:16:47,446 WARN L233 SmtUtils]: Spent 17.90s on a formula simplification that was a NOOP. DAG size: 498 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2022-12-14 12:17:05,292 WARN L233 SmtUtils]: Spent 17.83s on a formula simplification that was a NOOP. DAG size: 498 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2022-12-14 12:20:36,276 WARN L233 SmtUtils]: Spent 1.30m on a formula simplification that was a NOOP. DAG size: 891 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm)