./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label42+token_ring.04.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a 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_ddc8f6f4-493f-4e79-adc0-7d6e9115e03d/bin/utaipan-ByfvJB40ur/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc8f6f4-493f-4e79-adc0-7d6e9115e03d/bin/utaipan-ByfvJB40ur/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc8f6f4-493f-4e79-adc0-7d6e9115e03d/bin/utaipan-ByfvJB40ur/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc8f6f4-493f-4e79-adc0-7d6e9115e03d/bin/utaipan-ByfvJB40ur/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label42+token_ring.04.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc8f6f4-493f-4e79-adc0-7d6e9115e03d/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc8f6f4-493f-4e79-adc0-7d6e9115e03d/bin/utaipan-ByfvJB40ur --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 9e8eec1743df688e821561fda517f1945d9b8e3e5029879578d4191f60280f1b --- 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-38b53e6 [2022-11-26 00:05:22,932 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-26 00:05:22,935 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-26 00:05:22,971 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-26 00:05:22,971 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-26 00:05:22,972 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-26 00:05:22,974 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-26 00:05:22,980 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-26 00:05:22,983 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-26 00:05:22,988 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-26 00:05:22,990 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-26 00:05:22,992 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-26 00:05:22,993 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-26 00:05:22,997 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-26 00:05:23,001 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-26 00:05:23,003 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-26 00:05:23,004 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-26 00:05:23,005 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-26 00:05:23,007 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-26 00:05:23,013 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-26 00:05:23,015 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-26 00:05:23,017 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-26 00:05:23,019 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-26 00:05:23,020 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-26 00:05:23,030 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-26 00:05:23,030 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-26 00:05:23,031 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-26 00:05:23,032 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-26 00:05:23,033 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-26 00:05:23,034 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-26 00:05:23,034 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-26 00:05:23,035 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-26 00:05:23,037 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-26 00:05:23,040 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-26 00:05:23,041 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-26 00:05:23,041 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-26 00:05:23,042 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-26 00:05:23,042 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-26 00:05:23,042 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-26 00:05:23,044 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-26 00:05:23,044 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-26 00:05:23,045 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc8f6f4-493f-4e79-adc0-7d6e9115e03d/bin/utaipan-ByfvJB40ur/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-26 00:05:23,089 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-26 00:05:23,090 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-26 00:05:23,090 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-26 00:05:23,091 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-26 00:05:23,091 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-26 00:05:23,092 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-26 00:05:23,092 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-26 00:05:23,092 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-26 00:05:23,092 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-26 00:05:23,092 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-26 00:05:23,093 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-26 00:05:23,094 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-26 00:05:23,094 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-26 00:05:23,094 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-26 00:05:23,094 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-26 00:05:23,095 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-26 00:05:23,095 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-26 00:05:23,095 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-26 00:05:23,096 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-26 00:05:23,096 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-26 00:05:23,097 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-26 00:05:23,097 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-26 00:05:23,097 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-26 00:05:23,097 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-26 00:05:23,097 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-26 00:05:23,098 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-26 00:05:23,098 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-26 00:05:23,099 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-26 00:05:23,099 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-26 00:05:23,099 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-26 00:05:23,099 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-26 00:05:23,100 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-26 00:05:23,100 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:05:23,100 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-26 00:05:23,100 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-26 00:05:23,101 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-26 00:05:23,101 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-26 00:05:23,101 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-26 00:05:23,101 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-26 00:05:23,101 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-26 00:05:23,102 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-26 00:05:23,102 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_ddc8f6f4-493f-4e79-adc0-7d6e9115e03d/bin/utaipan-ByfvJB40ur/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc8f6f4-493f-4e79-adc0-7d6e9115e03d/bin/utaipan-ByfvJB40ur Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9e8eec1743df688e821561fda517f1945d9b8e3e5029879578d4191f60280f1b [2022-11-26 00:05:23,350 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-26 00:05:23,372 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-26 00:05:23,375 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-26 00:05:23,376 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-26 00:05:23,377 INFO L275 PluginConnector]: CDTParser initialized [2022-11-26 00:05:23,378 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc8f6f4-493f-4e79-adc0-7d6e9115e03d/bin/utaipan-ByfvJB40ur/../../sv-benchmarks/c/combinations/Problem05_label42+token_ring.04.cil-1.c [2022-11-26 00:05:26,418 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-26 00:05:27,138 INFO L351 CDTParser]: Found 1 translation units. [2022-11-26 00:05:27,139 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc8f6f4-493f-4e79-adc0-7d6e9115e03d/sv-benchmarks/c/combinations/Problem05_label42+token_ring.04.cil-1.c [2022-11-26 00:05:27,186 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc8f6f4-493f-4e79-adc0-7d6e9115e03d/bin/utaipan-ByfvJB40ur/data/4ff61cd7b/e6eded998bd8439f9c7fa825550ddf5f/FLAG34e8461ca [2022-11-26 00:05:27,203 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc8f6f4-493f-4e79-adc0-7d6e9115e03d/bin/utaipan-ByfvJB40ur/data/4ff61cd7b/e6eded998bd8439f9c7fa825550ddf5f [2022-11-26 00:05:27,206 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-26 00:05:27,208 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-26 00:05:27,212 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-26 00:05:27,212 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-26 00:05:27,215 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-26 00:05:27,216 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:05:27" (1/1) ... [2022-11-26 00:05:27,218 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@700deb76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:05:27, skipping insertion in model container [2022-11-26 00:05:27,218 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:05:27" (1/1) ... [2022-11-26 00:05:27,226 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-26 00:05:27,482 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-26 00:05:29,639 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_ddc8f6f4-493f-4e79-adc0-7d6e9115e03d/sv-benchmarks/c/combinations/Problem05_label42+token_ring.04.cil-1.c[378560,378573] [2022-11-26 00:05:29,672 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_ddc8f6f4-493f-4e79-adc0-7d6e9115e03d/sv-benchmarks/c/combinations/Problem05_label42+token_ring.04.cil-1.c[383339,383352] [2022-11-26 00:05:29,877 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:05:29,891 INFO L203 MainTranslator]: Completed pre-run [2022-11-26 00:05:31,202 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_ddc8f6f4-493f-4e79-adc0-7d6e9115e03d/sv-benchmarks/c/combinations/Problem05_label42+token_ring.04.cil-1.c[378560,378573] [2022-11-26 00:05:31,211 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_ddc8f6f4-493f-4e79-adc0-7d6e9115e03d/sv-benchmarks/c/combinations/Problem05_label42+token_ring.04.cil-1.c[383339,383352] [2022-11-26 00:05:31,235 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-26 00:05:31,301 INFO L208 MainTranslator]: Completed translation [2022-11-26 00:05:31,301 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:05:31 WrapperNode [2022-11-26 00:05:31,302 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-26 00:05:31,303 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-26 00:05:31,303 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-26 00:05:31,303 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-26 00:05:31,311 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:05:31" (1/1) ... [2022-11-26 00:05:31,401 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:05:31" (1/1) ... [2022-11-26 00:05:31,830 INFO L138 Inliner]: procedures = 52, calls = 53, calls flagged for inlining = 30, calls inlined = 30, statements flattened = 12735 [2022-11-26 00:05:31,830 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-26 00:05:31,831 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-26 00:05:31,831 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-26 00:05:31,831 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-26 00:05:31,841 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:05:31" (1/1) ... [2022-11-26 00:05:31,842 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:05:31" (1/1) ... [2022-11-26 00:05:32,001 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:05:31" (1/1) ... [2022-11-26 00:05:32,005 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:05:31" (1/1) ... [2022-11-26 00:05:32,321 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:05:31" (1/1) ... [2022-11-26 00:05:32,387 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:05:31" (1/1) ... [2022-11-26 00:05:32,430 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:05:31" (1/1) ... [2022-11-26 00:05:32,459 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:05:31" (1/1) ... [2022-11-26 00:05:32,555 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-26 00:05:32,571 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-26 00:05:32,571 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-26 00:05:32,572 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-26 00:05:32,572 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:05:31" (1/1) ... [2022-11-26 00:05:32,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-26 00:05:32,609 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc8f6f4-493f-4e79-adc0-7d6e9115e03d/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:05:32,641 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc8f6f4-493f-4e79-adc0-7d6e9115e03d/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-26 00:05:32,675 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc8f6f4-493f-4e79-adc0-7d6e9115e03d/bin/utaipan-ByfvJB40ur/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-26 00:05:32,710 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-26 00:05:32,711 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2022-11-26 00:05:32,711 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2022-11-26 00:05:32,711 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-11-26 00:05:32,711 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-11-26 00:05:32,711 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2022-11-26 00:05:32,711 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2022-11-26 00:05:32,712 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2022-11-26 00:05:32,712 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2022-11-26 00:05:32,712 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2022-11-26 00:05:32,712 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2022-11-26 00:05:32,712 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2022-11-26 00:05:32,712 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2022-11-26 00:05:32,712 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-26 00:05:32,713 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-26 00:05:32,713 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-26 00:05:32,866 INFO L235 CfgBuilder]: Building ICFG [2022-11-26 00:05:32,868 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-26 00:05:42,101 INFO L276 CfgBuilder]: Performing block encoding [2022-11-26 00:05:44,477 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-26 00:05:44,477 INFO L300 CfgBuilder]: Removed 8 assume(true) statements. [2022-11-26 00:05:44,482 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:05:44 BoogieIcfgContainer [2022-11-26 00:05:44,482 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-26 00:05:44,484 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-26 00:05:44,485 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-26 00:05:44,488 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-26 00:05:44,488 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 12:05:27" (1/3) ... [2022-11-26 00:05:44,489 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@359a4ef6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:05:44, skipping insertion in model container [2022-11-26 00:05:44,489 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:05:31" (2/3) ... [2022-11-26 00:05:44,490 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@359a4ef6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:05:44, skipping insertion in model container [2022-11-26 00:05:44,490 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:05:44" (3/3) ... [2022-11-26 00:05:44,491 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem05_label42+token_ring.04.cil-1.c [2022-11-26 00:05:44,521 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-26 00:05:44,521 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-26 00:05:44,649 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-26 00:05:44,658 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;@70707566, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-26 00:05:44,659 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-26 00:05:44,672 INFO L276 IsEmpty]: Start isEmpty. Operand has 1743 states, 1716 states have (on average 1.9726107226107226) internal successors, (3385), 1719 states have internal predecessors, (3385), 18 states have call successors, (18), 6 states have call predecessors, (18), 6 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-11-26 00:05:44,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-26 00:05:44,687 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:05:44,687 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:05:44,688 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:05:44,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:05:44,692 INFO L85 PathProgramCache]: Analyzing trace with hash 1527254023, now seen corresponding path program 1 times [2022-11-26 00:05:44,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:05:44,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025402259] [2022-11-26 00:05:44,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:05:44,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:05:44,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:05:45,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:05:45,136 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:05:45,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025402259] [2022-11-26 00:05:45,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025402259] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:05:45,137 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:05:45,137 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-26 00:05:45,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15611256] [2022-11-26 00:05:45,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:05:45,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:05:45,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:05:45,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:05:45,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:05:45,199 INFO L87 Difference]: Start difference. First operand has 1743 states, 1716 states have (on average 1.9726107226107226) internal successors, (3385), 1719 states have internal predecessors, (3385), 18 states have call successors, (18), 6 states have call predecessors, (18), 6 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-26 00:05:46,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:05:46,266 INFO L93 Difference]: Finished difference Result 3569 states and 6979 transitions. [2022-11-26 00:05:46,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-26 00:05:46,268 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 43 [2022-11-26 00:05:46,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:05:46,292 INFO L225 Difference]: With dead ends: 3569 [2022-11-26 00:05:46,292 INFO L226 Difference]: Without dead ends: 1825 [2022-11-26 00:05:46,302 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-26 00:05:46,306 INFO L413 NwaCegarLoop]: 3271 mSDtfsCounter, 3515 mSDsluCounter, 3205 mSDsCounter, 0 mSdLazyCounter, 598 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3515 SdHoareTripleChecker+Valid, 6476 SdHoareTripleChecker+Invalid, 612 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-26 00:05:46,307 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3515 Valid, 6476 Invalid, 612 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [14 Valid, 598 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-26 00:05:46,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1825 states. [2022-11-26 00:05:46,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1825 to 1824. [2022-11-26 00:05:46,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1824 states, 1778 states have (on average 1.9482564679415073) internal successors, (3464), 1781 states have internal predecessors, (3464), 32 states have call successors, (32), 12 states have call predecessors, (32), 12 states have return successors, (32), 31 states have call predecessors, (32), 32 states have call successors, (32) [2022-11-26 00:05:46,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1824 states to 1824 states and 3528 transitions. [2022-11-26 00:05:46,436 INFO L78 Accepts]: Start accepts. Automaton has 1824 states and 3528 transitions. Word has length 43 [2022-11-26 00:05:46,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:05:46,436 INFO L495 AbstractCegarLoop]: Abstraction has 1824 states and 3528 transitions. [2022-11-26 00:05:46,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-26 00:05:46,437 INFO L276 IsEmpty]: Start isEmpty. Operand 1824 states and 3528 transitions. [2022-11-26 00:05:46,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-26 00:05:46,440 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:05:46,441 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:05:46,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-26 00:05:46,441 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:05:46,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:05:46,442 INFO L85 PathProgramCache]: Analyzing trace with hash 414286499, now seen corresponding path program 1 times [2022-11-26 00:05:46,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:05:46,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664513677] [2022-11-26 00:05:46,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:05:46,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:05:46,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:05:46,660 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-26 00:05:46,660 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:05:46,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664513677] [2022-11-26 00:05:46,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664513677] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:05:46,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847347841] [2022-11-26 00:05:46,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:05:46,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:05:46,661 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc8f6f4-493f-4e79-adc0-7d6e9115e03d/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:05:46,666 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc8f6f4-493f-4e79-adc0-7d6e9115e03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:05:46,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc8f6f4-493f-4e79-adc0-7d6e9115e03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-26 00:05:46,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:05:46,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 492 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-26 00:05:46,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:05:46,924 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-26 00:05:46,925 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:05:46,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1847347841] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:05:46,925 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:05:46,925 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-26 00:05:46,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200019837] [2022-11-26 00:05:46,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:05:46,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:05:46,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:05:46,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:05:46,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-26 00:05:46,929 INFO L87 Difference]: Start difference. First operand 1824 states and 3528 transitions. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 2 states have internal predecessors, (50), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-26 00:05:47,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:05:47,403 INFO L93 Difference]: Finished difference Result 2173 states and 4035 transitions. [2022-11-26 00:05:47,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:05:47,404 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 2 states have internal predecessors, (50), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 80 [2022-11-26 00:05:47,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:05:47,418 INFO L225 Difference]: With dead ends: 2173 [2022-11-26 00:05:47,418 INFO L226 Difference]: Without dead ends: 1995 [2022-11-26 00:05:47,420 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-26 00:05:47,423 INFO L413 NwaCegarLoop]: 3207 mSDtfsCounter, 3384 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3384 SdHoareTripleChecker+Valid, 3312 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-26 00:05:47,423 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3384 Valid, 3312 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 268 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-26 00:05:47,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1995 states. [2022-11-26 00:05:47,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1995 to 1991. [2022-11-26 00:05:47,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1991 states, 1907 states have (on average 1.9113791295228106) internal successors, (3645), 1911 states have internal predecessors, (3645), 58 states have call successors, (58), 24 states have call predecessors, (58), 24 states have return successors, (58), 56 states have call predecessors, (58), 58 states have call successors, (58) [2022-11-26 00:05:47,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1991 states to 1991 states and 3761 transitions. [2022-11-26 00:05:47,503 INFO L78 Accepts]: Start accepts. Automaton has 1991 states and 3761 transitions. Word has length 80 [2022-11-26 00:05:47,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:05:47,503 INFO L495 AbstractCegarLoop]: Abstraction has 1991 states and 3761 transitions. [2022-11-26 00:05:47,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 2 states have internal predecessors, (50), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-26 00:05:47,504 INFO L276 IsEmpty]: Start isEmpty. Operand 1991 states and 3761 transitions. [2022-11-26 00:05:47,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-26 00:05:47,514 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:05:47,514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:05:47,532 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc8f6f4-493f-4e79-adc0-7d6e9115e03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-26 00:05:47,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc8f6f4-493f-4e79-adc0-7d6e9115e03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:05:47,729 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:05:47,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:05:47,730 INFO L85 PathProgramCache]: Analyzing trace with hash 934070915, now seen corresponding path program 1 times [2022-11-26 00:05:47,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:05:47,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851567788] [2022-11-26 00:05:47,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:05:47,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:05:47,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:05:47,912 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-26 00:05:47,912 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:05:47,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851567788] [2022-11-26 00:05:47,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851567788] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:05:47,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928294141] [2022-11-26 00:05:47,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:05:47,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:05:47,927 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc8f6f4-493f-4e79-adc0-7d6e9115e03d/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:05:47,942 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc8f6f4-493f-4e79-adc0-7d6e9115e03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:05:47,949 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc8f6f4-493f-4e79-adc0-7d6e9115e03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-26 00:05:48,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:05:48,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 486 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-26 00:05:48,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:05:48,152 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-26 00:05:48,152 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:05:48,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [928294141] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:05:48,153 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:05:48,153 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-26 00:05:48,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316270255] [2022-11-26 00:05:48,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:05:48,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:05:48,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:05:48,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:05:48,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-26 00:05:48,156 INFO L87 Difference]: Start difference. First operand 1991 states and 3761 transitions. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 2 states have internal predecessors, (53), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-26 00:05:48,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:05:48,713 INFO L93 Difference]: Finished difference Result 2668 states and 4736 transitions. [2022-11-26 00:05:48,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:05:48,714 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 2 states have internal predecessors, (53), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 80 [2022-11-26 00:05:48,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:05:48,725 INFO L225 Difference]: With dead ends: 2668 [2022-11-26 00:05:48,725 INFO L226 Difference]: Without dead ends: 2323 [2022-11-26 00:05:48,727 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-26 00:05:48,729 INFO L413 NwaCegarLoop]: 3182 mSDtfsCounter, 3381 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3381 SdHoareTripleChecker+Valid, 3287 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-26 00:05:48,729 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3381 Valid, 3287 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-26 00:05:48,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2323 states. [2022-11-26 00:05:48,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2323 to 2317. [2022-11-26 00:05:48,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2317 states, 2159 states have (on average 1.8503937007874016) internal successors, (3995), 2165 states have internal predecessors, (3995), 108 states have call successors, (108), 48 states have call predecessors, (108), 48 states have return successors, (108), 104 states have call predecessors, (108), 108 states have call successors, (108) [2022-11-26 00:05:48,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2317 states to 2317 states and 4211 transitions. [2022-11-26 00:05:48,812 INFO L78 Accepts]: Start accepts. Automaton has 2317 states and 4211 transitions. Word has length 80 [2022-11-26 00:05:48,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:05:48,812 INFO L495 AbstractCegarLoop]: Abstraction has 2317 states and 4211 transitions. [2022-11-26 00:05:48,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 2 states have internal predecessors, (53), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-26 00:05:48,813 INFO L276 IsEmpty]: Start isEmpty. Operand 2317 states and 4211 transitions. [2022-11-26 00:05:48,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-26 00:05:48,815 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:05:48,816 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:05:48,826 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc8f6f4-493f-4e79-adc0-7d6e9115e03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-26 00:05:49,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc8f6f4-493f-4e79-adc0-7d6e9115e03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:05:49,022 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:05:49,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:05:49,023 INFO L85 PathProgramCache]: Analyzing trace with hash 1650036387, now seen corresponding path program 1 times [2022-11-26 00:05:49,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:05:49,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76748309] [2022-11-26 00:05:49,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:05:49,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:05:49,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:05:49,182 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-26 00:05:49,182 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:05:49,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76748309] [2022-11-26 00:05:49,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76748309] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:05:49,183 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:05:49,183 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:05:49,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316437915] [2022-11-26 00:05:49,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:05:49,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:05:49,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:05:49,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:05:49,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:05:49,185 INFO L87 Difference]: Start difference. First operand 2317 states and 4211 transitions. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-26 00:05:49,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:05:49,753 INFO L93 Difference]: Finished difference Result 2839 states and 4960 transitions. [2022-11-26 00:05:49,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:05:49,754 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 80 [2022-11-26 00:05:49,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:05:49,766 INFO L225 Difference]: With dead ends: 2839 [2022-11-26 00:05:49,767 INFO L226 Difference]: Without dead ends: 2493 [2022-11-26 00:05:49,769 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:05:49,770 INFO L413 NwaCegarLoop]: 3228 mSDtfsCounter, 55 mSDsluCounter, 3174 mSDsCounter, 0 mSdLazyCounter, 488 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 6402 SdHoareTripleChecker+Invalid, 488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-26 00:05:49,771 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 6402 Invalid, 488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 488 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-26 00:05:49,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2493 states. [2022-11-26 00:05:49,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2493 to 2421. [2022-11-26 00:05:49,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2421 states, 2255 states have (on average 1.8425720620842572) internal successors, (4155), 2261 states have internal predecessors, (4155), 112 states have call successors, (112), 52 states have call predecessors, (112), 52 states have return successors, (112), 108 states have call predecessors, (112), 112 states have call successors, (112) [2022-11-26 00:05:49,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2421 states to 2421 states and 4379 transitions. [2022-11-26 00:05:49,999 INFO L78 Accepts]: Start accepts. Automaton has 2421 states and 4379 transitions. Word has length 80 [2022-11-26 00:05:50,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:05:50,003 INFO L495 AbstractCegarLoop]: Abstraction has 2421 states and 4379 transitions. [2022-11-26 00:05:50,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-26 00:05:50,005 INFO L276 IsEmpty]: Start isEmpty. Operand 2421 states and 4379 transitions. [2022-11-26 00:05:50,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-11-26 00:05:50,009 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:05:50,009 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:05:50,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-26 00:05:50,015 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:05:50,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:05:50,015 INFO L85 PathProgramCache]: Analyzing trace with hash 1417674127, now seen corresponding path program 1 times [2022-11-26 00:05:50,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:05:50,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023600390] [2022-11-26 00:05:50,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:05:50,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:05:50,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:05:50,155 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-11-26 00:05:50,156 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:05:50,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023600390] [2022-11-26 00:05:50,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023600390] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:05:50,157 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:05:50,157 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:05:50,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29711157] [2022-11-26 00:05:50,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:05:50,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:05:50,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:05:50,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:05:50,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:05:50,161 INFO L87 Difference]: Start difference. First operand 2421 states and 4379 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, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-26 00:05:50,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:05:50,777 INFO L93 Difference]: Finished difference Result 3934 states and 6568 transitions. [2022-11-26 00:05:50,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:05:50,778 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, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 106 [2022-11-26 00:05:50,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:05:50,795 INFO L225 Difference]: With dead ends: 3934 [2022-11-26 00:05:50,796 INFO L226 Difference]: Without dead ends: 3159 [2022-11-26 00:05:50,801 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:05:50,804 INFO L413 NwaCegarLoop]: 3189 mSDtfsCounter, 3375 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3375 SdHoareTripleChecker+Valid, 3294 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-26 00:05:50,805 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3375 Valid, 3294 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-26 00:05:50,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3159 states. [2022-11-26 00:05:50,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3159 to 3145. [2022-11-26 00:05:50,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3145 states, 2827 states have (on average 1.7541563494870889) internal successors, (4959), 2837 states have internal predecessors, (4959), 212 states have call successors, (212), 104 states have call predecessors, (212), 104 states have return successors, (212), 204 states have call predecessors, (212), 212 states have call successors, (212) [2022-11-26 00:05:50,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3145 states to 3145 states and 5383 transitions. [2022-11-26 00:05:50,973 INFO L78 Accepts]: Start accepts. Automaton has 3145 states and 5383 transitions. Word has length 106 [2022-11-26 00:05:50,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:05:50,975 INFO L495 AbstractCegarLoop]: Abstraction has 3145 states and 5383 transitions. [2022-11-26 00:05:50,975 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, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-26 00:05:50,976 INFO L276 IsEmpty]: Start isEmpty. Operand 3145 states and 5383 transitions. [2022-11-26 00:05:50,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-11-26 00:05:50,989 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:05:50,990 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:05:50,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-26 00:05:50,990 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:05:50,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:05:50,991 INFO L85 PathProgramCache]: Analyzing trace with hash -475711734, now seen corresponding path program 1 times [2022-11-26 00:05:50,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:05:50,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053542858] [2022-11-26 00:05:50,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:05:50,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:05:51,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:05:51,112 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-11-26 00:05:51,113 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:05:51,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053542858] [2022-11-26 00:05:51,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053542858] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:05:51,113 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-26 00:05:51,113 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-26 00:05:51,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081300633] [2022-11-26 00:05:51,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:05:51,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:05:51,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:05:51,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:05:51,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:05:51,116 INFO L87 Difference]: Start difference. First operand 3145 states and 5383 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, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-26 00:05:51,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:05:51,751 INFO L93 Difference]: Finished difference Result 6070 states and 9556 transitions. [2022-11-26 00:05:51,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:05:51,752 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, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 106 [2022-11-26 00:05:51,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:05:51,776 INFO L225 Difference]: With dead ends: 6070 [2022-11-26 00:05:51,776 INFO L226 Difference]: Without dead ends: 4571 [2022-11-26 00:05:51,783 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-26 00:05:51,784 INFO L413 NwaCegarLoop]: 3187 mSDtfsCounter, 3378 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3378 SdHoareTripleChecker+Valid, 3292 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-26 00:05:51,784 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3378 Valid, 3292 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-26 00:05:51,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4571 states. [2022-11-26 00:05:52,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4571 to 4545. [2022-11-26 00:05:52,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4545 states, 3931 states have (on average 1.6502162299669296) internal successors, (6487), 3949 states have internal predecessors, (6487), 404 states have call successors, (404), 208 states have call predecessors, (404), 208 states have return successors, (404), 388 states have call predecessors, (404), 404 states have call successors, (404) [2022-11-26 00:05:52,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4545 states to 4545 states and 7295 transitions. [2022-11-26 00:05:52,031 INFO L78 Accepts]: Start accepts. Automaton has 4545 states and 7295 transitions. Word has length 106 [2022-11-26 00:05:52,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:05:52,032 INFO L495 AbstractCegarLoop]: Abstraction has 4545 states and 7295 transitions. [2022-11-26 00:05:52,032 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, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-26 00:05:52,032 INFO L276 IsEmpty]: Start isEmpty. Operand 4545 states and 7295 transitions. [2022-11-26 00:05:52,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-11-26 00:05:52,043 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:05:52,043 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:05:52,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-26 00:05:52,044 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:05:52,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:05:52,044 INFO L85 PathProgramCache]: Analyzing trace with hash -832557665, now seen corresponding path program 1 times [2022-11-26 00:05:52,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:05:52,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83265940] [2022-11-26 00:05:52,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:05:52,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:05:52,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:05:52,200 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-11-26 00:05:52,200 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:05:52,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83265940] [2022-11-26 00:05:52,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83265940] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:05:52,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552778189] [2022-11-26 00:05:52,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:05:52,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:05:52,201 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc8f6f4-493f-4e79-adc0-7d6e9115e03d/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:05:52,203 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc8f6f4-493f-4e79-adc0-7d6e9115e03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:05:52,213 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc8f6f4-493f-4e79-adc0-7d6e9115e03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-26 00:05:52,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:05:52,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 636 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-26 00:05:52,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:05:52,418 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-26 00:05:52,419 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:05:52,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552778189] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:05:52,419 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:05:52,419 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-26 00:05:52,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905896474] [2022-11-26 00:05:52,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:05:52,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:05:52,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:05:52,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:05:52,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-26 00:05:52,424 INFO L87 Difference]: Start difference. First operand 4545 states and 7295 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-26 00:05:53,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:05:53,158 INFO L93 Difference]: Finished difference Result 6981 states and 10769 transitions. [2022-11-26 00:05:53,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:05:53,160 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 120 [2022-11-26 00:05:53,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:05:53,194 INFO L225 Difference]: With dead ends: 6981 [2022-11-26 00:05:53,194 INFO L226 Difference]: Without dead ends: 5495 [2022-11-26 00:05:53,201 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-26 00:05:53,202 INFO L413 NwaCegarLoop]: 3234 mSDtfsCounter, 68 mSDsluCounter, 3176 mSDsCounter, 0 mSdLazyCounter, 488 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 6410 SdHoareTripleChecker+Invalid, 488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-26 00:05:53,203 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 6410 Invalid, 488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 488 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-26 00:05:53,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5495 states. [2022-11-26 00:05:53,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5495 to 5053. [2022-11-26 00:05:53,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5053 states, 4391 states have (on average 1.6467774994306537) internal successors, (7231), 4409 states have internal predecessors, (7231), 428 states have call successors, (428), 232 states have call predecessors, (428), 232 states have return successors, (428), 412 states have call predecessors, (428), 428 states have call successors, (428) [2022-11-26 00:05:53,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5053 states to 5053 states and 8087 transitions. [2022-11-26 00:05:53,540 INFO L78 Accepts]: Start accepts. Automaton has 5053 states and 8087 transitions. Word has length 120 [2022-11-26 00:05:53,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:05:53,541 INFO L495 AbstractCegarLoop]: Abstraction has 5053 states and 8087 transitions. [2022-11-26 00:05:53,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-26 00:05:53,542 INFO L276 IsEmpty]: Start isEmpty. Operand 5053 states and 8087 transitions. [2022-11-26 00:05:53,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-11-26 00:05:53,556 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:05:53,556 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:05:53,563 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc8f6f4-493f-4e79-adc0-7d6e9115e03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-26 00:05:53,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc8f6f4-493f-4e79-adc0-7d6e9115e03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:05:53,763 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:05:53,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:05:53,763 INFO L85 PathProgramCache]: Analyzing trace with hash -82657837, now seen corresponding path program 1 times [2022-11-26 00:05:53,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:05:53,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125590218] [2022-11-26 00:05:53,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:05:53,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:05:53,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:05:53,932 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 21 proven. 3 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-11-26 00:05:53,933 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:05:53,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125590218] [2022-11-26 00:05:53,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125590218] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:05:53,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328231642] [2022-11-26 00:05:53,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:05:53,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:05:53,934 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc8f6f4-493f-4e79-adc0-7d6e9115e03d/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:05:53,935 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc8f6f4-493f-4e79-adc0-7d6e9115e03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:05:53,967 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc8f6f4-493f-4e79-adc0-7d6e9115e03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-26 00:05:54,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:05:54,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 636 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-26 00:05:54,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:05:54,155 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-26 00:05:54,155 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:05:54,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [328231642] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:05:54,156 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:05:54,156 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-26 00:05:54,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812064367] [2022-11-26 00:05:54,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:05:54,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:05:54,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:05:54,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:05:54,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-26 00:05:54,158 INFO L87 Difference]: Start difference. First operand 5053 states and 8087 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-26 00:05:55,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:05:55,014 INFO L93 Difference]: Finished difference Result 8017 states and 12365 transitions. [2022-11-26 00:05:55,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:05:55,015 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 120 [2022-11-26 00:05:55,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:05:55,064 INFO L225 Difference]: With dead ends: 8017 [2022-11-26 00:05:55,064 INFO L226 Difference]: Without dead ends: 6271 [2022-11-26 00:05:55,071 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-26 00:05:55,072 INFO L413 NwaCegarLoop]: 3247 mSDtfsCounter, 74 mSDsluCounter, 3176 mSDsCounter, 0 mSdLazyCounter, 489 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 6423 SdHoareTripleChecker+Invalid, 489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-26 00:05:55,073 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 6423 Invalid, 489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 489 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-26 00:05:55,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6271 states. [2022-11-26 00:05:55,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6271 to 5773. [2022-11-26 00:05:55,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5773 states, 5039 states have (on average 1.6398094860091288) internal successors, (8263), 5057 states have internal predecessors, (8263), 464 states have call successors, (464), 268 states have call predecessors, (464), 268 states have return successors, (464), 448 states have call predecessors, (464), 464 states have call successors, (464) [2022-11-26 00:05:55,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5773 states to 5773 states and 9191 transitions. [2022-11-26 00:05:55,352 INFO L78 Accepts]: Start accepts. Automaton has 5773 states and 9191 transitions. Word has length 120 [2022-11-26 00:05:55,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:05:55,352 INFO L495 AbstractCegarLoop]: Abstraction has 5773 states and 9191 transitions. [2022-11-26 00:05:55,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-26 00:05:55,353 INFO L276 IsEmpty]: Start isEmpty. Operand 5773 states and 9191 transitions. [2022-11-26 00:05:55,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-11-26 00:05:55,366 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:05:55,366 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:05:55,378 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc8f6f4-493f-4e79-adc0-7d6e9115e03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-26 00:05:55,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc8f6f4-493f-4e79-adc0-7d6e9115e03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:05:55,573 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:05:55,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:05:55,573 INFO L85 PathProgramCache]: Analyzing trace with hash -1393992132, now seen corresponding path program 1 times [2022-11-26 00:05:55,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:05:55,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393516403] [2022-11-26 00:05:55,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:05:55,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:05:55,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:05:55,723 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 20 proven. 4 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-11-26 00:05:55,723 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:05:55,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393516403] [2022-11-26 00:05:55,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393516403] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:05:55,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642461852] [2022-11-26 00:05:55,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:05:55,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:05:55,725 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc8f6f4-493f-4e79-adc0-7d6e9115e03d/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:05:55,726 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc8f6f4-493f-4e79-adc0-7d6e9115e03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:05:55,736 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc8f6f4-493f-4e79-adc0-7d6e9115e03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-26 00:05:55,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:05:55,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 633 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-26 00:05:55,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:05:55,929 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-26 00:05:55,930 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:05:55,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1642461852] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:05:55,930 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:05:55,930 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-26 00:05:55,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478399643] [2022-11-26 00:05:55,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:05:55,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:05:55,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:05:55,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:05:55,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-26 00:05:55,933 INFO L87 Difference]: Start difference. First operand 5773 states and 9191 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-26 00:05:56,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:05:56,634 INFO L93 Difference]: Finished difference Result 9513 states and 14663 transitions. [2022-11-26 00:05:56,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:05:56,634 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 120 [2022-11-26 00:05:56,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:05:56,666 INFO L225 Difference]: With dead ends: 9513 [2022-11-26 00:05:56,667 INFO L226 Difference]: Without dead ends: 7371 [2022-11-26 00:05:56,675 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-26 00:05:56,676 INFO L413 NwaCegarLoop]: 3252 mSDtfsCounter, 80 mSDsluCounter, 3176 mSDsCounter, 0 mSdLazyCounter, 490 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 6428 SdHoareTripleChecker+Invalid, 490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-26 00:05:56,676 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 6428 Invalid, 490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 490 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-26 00:05:56,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7371 states. [2022-11-26 00:05:56,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7371 to 6817. [2022-11-26 00:05:56,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6817 states, 5975 states have (on average 1.6299581589958159) internal successors, (9739), 5993 states have internal predecessors, (9739), 518 states have call successors, (518), 322 states have call predecessors, (518), 322 states have return successors, (518), 502 states have call predecessors, (518), 518 states have call successors, (518) [2022-11-26 00:05:56,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6817 states to 6817 states and 10775 transitions. [2022-11-26 00:05:56,983 INFO L78 Accepts]: Start accepts. Automaton has 6817 states and 10775 transitions. Word has length 120 [2022-11-26 00:05:56,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:05:56,983 INFO L495 AbstractCegarLoop]: Abstraction has 6817 states and 10775 transitions. [2022-11-26 00:05:56,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-26 00:05:56,984 INFO L276 IsEmpty]: Start isEmpty. Operand 6817 states and 10775 transitions. [2022-11-26 00:05:56,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-11-26 00:05:56,997 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:05:56,997 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:05:57,008 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc8f6f4-493f-4e79-adc0-7d6e9115e03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-26 00:05:57,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc8f6f4-493f-4e79-adc0-7d6e9115e03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-26 00:05:57,203 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:05:57,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:05:57,204 INFO L85 PathProgramCache]: Analyzing trace with hash 1617573369, now seen corresponding path program 1 times [2022-11-26 00:05:57,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:05:57,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746861439] [2022-11-26 00:05:57,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:05:57,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:05:57,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:05:57,350 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 23 proven. 1 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-11-26 00:05:57,350 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:05:57,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746861439] [2022-11-26 00:05:57,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746861439] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:05:57,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735314407] [2022-11-26 00:05:57,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:05:57,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:05:57,351 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc8f6f4-493f-4e79-adc0-7d6e9115e03d/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:05:57,352 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc8f6f4-493f-4e79-adc0-7d6e9115e03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:05:57,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc8f6f4-493f-4e79-adc0-7d6e9115e03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-26 00:05:57,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:05:57,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 633 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-26 00:05:57,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:05:57,557 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-26 00:05:57,557 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:05:57,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [735314407] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:05:57,558 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:05:57,558 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-26 00:05:57,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408710145] [2022-11-26 00:05:57,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:05:57,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:05:57,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:05:57,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:05:57,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-26 00:05:57,563 INFO L87 Difference]: Start difference. First operand 6817 states and 10775 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-26 00:05:58,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:05:58,459 INFO L93 Difference]: Finished difference Result 11379 states and 17534 transitions. [2022-11-26 00:05:58,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:05:58,460 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 120 [2022-11-26 00:05:58,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:05:58,486 INFO L225 Difference]: With dead ends: 11379 [2022-11-26 00:05:58,487 INFO L226 Difference]: Without dead ends: 8688 [2022-11-26 00:05:58,494 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-26 00:05:58,495 INFO L413 NwaCegarLoop]: 3237 mSDtfsCounter, 62 mSDsluCounter, 3176 mSDsCounter, 0 mSdLazyCounter, 487 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 6413 SdHoareTripleChecker+Invalid, 487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 487 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-26 00:05:58,496 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 6413 Invalid, 487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 487 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-26 00:05:58,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8688 states. [2022-11-26 00:05:58,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8688 to 8302. [2022-11-26 00:05:58,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8302 states, 7298 states have (on average 1.6156481227733626) internal successors, (11791), 7316 states have internal predecessors, (11791), 599 states have call successors, (599), 403 states have call predecessors, (599), 403 states have return successors, (599), 583 states have call predecessors, (599), 599 states have call successors, (599) [2022-11-26 00:05:58,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8302 states to 8302 states and 12989 transitions. [2022-11-26 00:05:58,834 INFO L78 Accepts]: Start accepts. Automaton has 8302 states and 12989 transitions. Word has length 120 [2022-11-26 00:05:58,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:05:58,835 INFO L495 AbstractCegarLoop]: Abstraction has 8302 states and 12989 transitions. [2022-11-26 00:05:58,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-26 00:05:58,835 INFO L276 IsEmpty]: Start isEmpty. Operand 8302 states and 12989 transitions. [2022-11-26 00:05:58,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-11-26 00:05:58,850 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:05:58,851 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:05:58,862 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc8f6f4-493f-4e79-adc0-7d6e9115e03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-26 00:05:59,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc8f6f4-493f-4e79-adc0-7d6e9115e03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:05:59,057 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:05:59,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:05:59,058 INFO L85 PathProgramCache]: Analyzing trace with hash -1411953984, now seen corresponding path program 2 times [2022-11-26 00:05:59,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:05:59,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165464677] [2022-11-26 00:05:59,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:05:59,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:05:59,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:05:59,341 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 10 proven. 31 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-26 00:05:59,341 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:05:59,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165464677] [2022-11-26 00:05:59,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165464677] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:05:59,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720175829] [2022-11-26 00:05:59,342 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-26 00:05:59,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:05:59,342 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc8f6f4-493f-4e79-adc0-7d6e9115e03d/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:05:59,343 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc8f6f4-493f-4e79-adc0-7d6e9115e03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:05:59,362 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc8f6f4-493f-4e79-adc0-7d6e9115e03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-26 00:05:59,508 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-26 00:05:59,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-26 00:05:59,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 606 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-26 00:05:59,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:05:59,766 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 56 proven. 10 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-26 00:05:59,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-26 00:06:00,390 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 19 proven. 34 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-26 00:06:00,390 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [720175829] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-26 00:06:00,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [475242023] [2022-11-26 00:06:00,418 INFO L159 IcfgInterpreter]: Started Sifa with 63 locations of interest [2022-11-26 00:06:00,418 INFO L166 IcfgInterpreter]: Building call graph [2022-11-26 00:06:00,422 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-26 00:06:00,428 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-26 00:06:00,429 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-26 00:06:08,011 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events with input of size 143 for LOIs [2022-11-26 00:06:08,071 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 10 [2022-11-26 00:06:08,662 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 10 [2022-11-26 00:09:10,082 WARN L233 SmtUtils]: Spent 3.00m on a formula simplification that was a NOOP. DAG size: 1180 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2022-11-26 00:11:47,957 WARN L233 SmtUtils]: Spent 2.63m on a formula simplification that was a NOOP. DAG size: 1180 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.xJunctTerm) [2022-11-26 00:11:47,996 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events with input of size 143 for LOIs [2022-11-26 00:11:48,028 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels with input of size 123 for LOIs [2022-11-26 00:11:48,035 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread with input of size 125 for LOIs [2022-11-26 00:11:48,092 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify with input of size 121 for LOIs [2022-11-26 00:11:48,471 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads with input of size 119 for LOIs [2022-11-26 00:11:48,979 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-26 00:12:39,958 WARN L233 SmtUtils]: Spent 39.72s on a formula simplification. DAG size of input: 1180 DAG size of output: 96 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-26 00:12:51,644 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '130250#(and (= ~a15~0 1) (= 5 ~a20~0) (<= |ULTIMATE.start_eval_~tmp_ndt_1~0#1| 2147483647) (= ~t1_pc~0 0) (= ~t1_i~0 1) (= ~a25~0 1) (not (= ~token~0 (+ ~local~0 4))) (<= 0 ~t2_pc~0) (= ~a~0 1) (= |ULTIMATE.start_start_simulation_~kernel_st~0#1| 1) (= ~d~0 4) (= 0 ~t3_pc~0) (= ~a16~0 1) (<= 0 (+ |ULTIMATE.start_eval_~tmp_ndt_1~0#1| 2147483648)) (= 5 ~e~0) (= ~m_pc~0 1) (= ~m_i~0 1) (= ~a12~0 4) (= ~a9~0 18) (= |ULTIMATE.start_eval_~tmp~0#1| 1) (= 6 ~f~0) (= 3 ~c~0) (= ~t2_i~0 1) (= 2 ~b~0) (not (= |ULTIMATE.start_eval_~tmp_ndt_1~0#1| 0)) (= ~m_st~0 1) (= |#NULL.offset| 0) (= ~a27~0 1) (= 0 ~t4_pc~0) (= ~t3_i~0 1) (= ~t4_i~0 1) (<= 0 |#StackHeapBarrier|) (= ~a2~0 10) (= |#NULL.base| 0))' at error location [2022-11-26 00:12:51,644 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-26 00:12:51,644 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-26 00:12:51,644 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 13 [2022-11-26 00:12:51,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807280415] [2022-11-26 00:12:51,645 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-26 00:12:51,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-26 00:12:51,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:12:51,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-26 00:12:51,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=429, Invalid=3353, Unknown=0, NotChecked=0, Total=3782 [2022-11-26 00:12:51,648 INFO L87 Difference]: Start difference. First operand 8302 states and 12989 transitions. Second operand has 13 states, 13 states have (on average 12.461538461538462) internal successors, (162), 13 states have internal predecessors, (162), 8 states have call successors, (26), 7 states have call predecessors, (26), 8 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) [2022-11-26 00:12:54,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:12:54,734 INFO L93 Difference]: Finished difference Result 23158 states and 34238 transitions. [2022-11-26 00:12:54,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-26 00:12:54,735 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 12.461538461538462) internal successors, (162), 13 states have internal predecessors, (162), 8 states have call successors, (26), 7 states have call predecessors, (26), 8 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) Word has length 120 [2022-11-26 00:12:54,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:12:54,796 INFO L225 Difference]: With dead ends: 23158 [2022-11-26 00:12:54,796 INFO L226 Difference]: Without dead ends: 16503 [2022-11-26 00:12:54,810 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 417 GetRequests, 323 SyntacticMatches, 6 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3457 ImplicationChecksByTransitivity, 63.1s TimeCoverageRelationStatistics Valid=972, Invalid=7038, Unknown=0, NotChecked=0, Total=8010 [2022-11-26 00:12:54,811 INFO L413 NwaCegarLoop]: 3243 mSDtfsCounter, 11314 mSDsluCounter, 15974 mSDsCounter, 0 mSdLazyCounter, 1884 mSolverCounterSat, 561 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11314 SdHoareTripleChecker+Valid, 19217 SdHoareTripleChecker+Invalid, 2445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 561 IncrementalHoareTripleChecker+Valid, 1884 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-26 00:12:54,811 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11314 Valid, 19217 Invalid, 2445 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [561 Valid, 1884 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-26 00:12:54,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16503 states. [2022-11-26 00:12:55,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16503 to 14397. [2022-11-26 00:12:55,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14397 states, 12347 states have (on average 1.515428849113145) internal successors, (18711), 12373 states have internal predecessors, (18711), 1212 states have call successors, (1212), 836 states have call predecessors, (1212), 836 states have return successors, (1212), 1188 states have call predecessors, (1212), 1212 states have call successors, (1212) [2022-11-26 00:12:55,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14397 states to 14397 states and 21135 transitions. [2022-11-26 00:12:55,720 INFO L78 Accepts]: Start accepts. Automaton has 14397 states and 21135 transitions. Word has length 120 [2022-11-26 00:12:55,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:12:55,720 INFO L495 AbstractCegarLoop]: Abstraction has 14397 states and 21135 transitions. [2022-11-26 00:12:55,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 12.461538461538462) internal successors, (162), 13 states have internal predecessors, (162), 8 states have call successors, (26), 7 states have call predecessors, (26), 8 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) [2022-11-26 00:12:55,721 INFO L276 IsEmpty]: Start isEmpty. Operand 14397 states and 21135 transitions. [2022-11-26 00:12:55,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-11-26 00:12:55,742 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:12:55,743 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:12:55,755 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc8f6f4-493f-4e79-adc0-7d6e9115e03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-26 00:12:55,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc8f6f4-493f-4e79-adc0-7d6e9115e03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:12:55,950 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:12:55,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:12:55,950 INFO L85 PathProgramCache]: Analyzing trace with hash 95048522, now seen corresponding path program 1 times [2022-11-26 00:12:55,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:12:55,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703684048] [2022-11-26 00:12:55,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:12:55,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:12:55,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:12:56,256 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 17 proven. 33 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-26 00:12:56,256 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:12:56,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703684048] [2022-11-26 00:12:56,257 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703684048] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:12:56,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311628437] [2022-11-26 00:12:56,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:12:56,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:12:56,257 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc8f6f4-493f-4e79-adc0-7d6e9115e03d/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:12:56,259 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc8f6f4-493f-4e79-adc0-7d6e9115e03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:12:56,282 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc8f6f4-493f-4e79-adc0-7d6e9115e03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-26 00:12:56,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:12:56,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 640 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-26 00:12:56,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:12:56,460 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 70 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-26 00:12:56,461 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:12:56,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [311628437] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:12:56,461 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:12:56,461 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-26 00:12:56,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678745177] [2022-11-26 00:12:56,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:12:56,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:12:56,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:12:56,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:12:56,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-26 00:12:56,464 INFO L87 Difference]: Start difference. First operand 14397 states and 21135 transitions. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-26 00:12:57,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:12:57,646 INFO L93 Difference]: Finished difference Result 23617 states and 34470 transitions. [2022-11-26 00:12:57,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:12:57,646 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 121 [2022-11-26 00:12:57,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:12:57,696 INFO L225 Difference]: With dead ends: 23617 [2022-11-26 00:12:57,696 INFO L226 Difference]: Without dead ends: 14423 [2022-11-26 00:12:57,722 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-26 00:12:57,723 INFO L413 NwaCegarLoop]: 3251 mSDtfsCounter, 108 mSDsluCounter, 3162 mSDsCounter, 0 mSdLazyCounter, 491 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 6413 SdHoareTripleChecker+Invalid, 493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-26 00:12:57,723 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 6413 Invalid, 493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 491 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-26 00:12:57,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14423 states. [2022-11-26 00:12:58,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14423 to 14229. [2022-11-26 00:12:58,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14229 states, 12179 states have (on average 1.4995484029887511) internal successors, (18263), 12205 states have internal predecessors, (18263), 1212 states have call successors, (1212), 836 states have call predecessors, (1212), 836 states have return successors, (1212), 1188 states have call predecessors, (1212), 1212 states have call successors, (1212) [2022-11-26 00:12:58,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14229 states to 14229 states and 20687 transitions. [2022-11-26 00:12:58,511 INFO L78 Accepts]: Start accepts. Automaton has 14229 states and 20687 transitions. Word has length 121 [2022-11-26 00:12:58,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:12:58,511 INFO L495 AbstractCegarLoop]: Abstraction has 14229 states and 20687 transitions. [2022-11-26 00:12:58,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-26 00:12:58,512 INFO L276 IsEmpty]: Start isEmpty. Operand 14229 states and 20687 transitions. [2022-11-26 00:12:58,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-11-26 00:12:58,533 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:12:58,533 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:12:58,544 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc8f6f4-493f-4e79-adc0-7d6e9115e03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-26 00:12:58,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc8f6f4-493f-4e79-adc0-7d6e9115e03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:12:58,744 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:12:58,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:12:58,745 INFO L85 PathProgramCache]: Analyzing trace with hash 207404714, now seen corresponding path program 1 times [2022-11-26 00:12:58,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:12:58,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687775018] [2022-11-26 00:12:58,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:12:58,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:12:58,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:12:58,980 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 17 proven. 31 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-26 00:12:58,981 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:12:58,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687775018] [2022-11-26 00:12:58,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687775018] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:12:58,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660540786] [2022-11-26 00:12:58,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:12:58,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:12:58,982 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc8f6f4-493f-4e79-adc0-7d6e9115e03d/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:12:58,983 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc8f6f4-493f-4e79-adc0-7d6e9115e03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:12:59,002 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc8f6f4-493f-4e79-adc0-7d6e9115e03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-26 00:12:59,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:12:59,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 646 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-26 00:12:59,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:12:59,248 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-26 00:12:59,248 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:12:59,249 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [660540786] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:12:59,249 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:12:59,249 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-26 00:12:59,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791065441] [2022-11-26 00:12:59,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:12:59,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:12:59,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:12:59,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:12:59,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-26 00:12:59,250 INFO L87 Difference]: Start difference. First operand 14229 states and 20687 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-26 00:13:00,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:13:00,392 INFO L93 Difference]: Finished difference Result 23244 states and 33370 transitions. [2022-11-26 00:13:00,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:13:00,393 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 121 [2022-11-26 00:13:00,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:13:00,443 INFO L225 Difference]: With dead ends: 23244 [2022-11-26 00:13:00,443 INFO L226 Difference]: Without dead ends: 14779 [2022-11-26 00:13:00,466 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-26 00:13:00,467 INFO L413 NwaCegarLoop]: 3185 mSDtfsCounter, 3387 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3387 SdHoareTripleChecker+Valid, 3214 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:13:00,468 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3387 Valid, 3214 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 00:13:00,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14779 states. [2022-11-26 00:13:01,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14779 to 14779. [2022-11-26 00:13:01,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14779 states, 12661 states have (on average 1.4855856567411736) internal successors, (18809), 12687 states have internal predecessors, (18809), 1234 states have call successors, (1234), 882 states have call predecessors, (1234), 882 states have return successors, (1234), 1210 states have call predecessors, (1234), 1234 states have call successors, (1234) [2022-11-26 00:13:01,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14779 states to 14779 states and 21277 transitions. [2022-11-26 00:13:01,416 INFO L78 Accepts]: Start accepts. Automaton has 14779 states and 21277 transitions. Word has length 121 [2022-11-26 00:13:01,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:13:01,416 INFO L495 AbstractCegarLoop]: Abstraction has 14779 states and 21277 transitions. [2022-11-26 00:13:01,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-26 00:13:01,417 INFO L276 IsEmpty]: Start isEmpty. Operand 14779 states and 21277 transitions. [2022-11-26 00:13:01,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-11-26 00:13:01,445 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:13:01,445 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:13:01,459 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc8f6f4-493f-4e79-adc0-7d6e9115e03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-26 00:13:01,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc8f6f4-493f-4e79-adc0-7d6e9115e03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-26 00:13:01,651 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:13:01,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:13:01,652 INFO L85 PathProgramCache]: Analyzing trace with hash 2073228553, now seen corresponding path program 1 times [2022-11-26 00:13:01,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:13:01,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411963493] [2022-11-26 00:13:01,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:13:01,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:13:01,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:13:01,885 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 17 proven. 32 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-26 00:13:01,885 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:13:01,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411963493] [2022-11-26 00:13:01,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411963493] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:13:01,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957226889] [2022-11-26 00:13:01,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:13:01,886 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:13:01,886 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc8f6f4-493f-4e79-adc0-7d6e9115e03d/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:13:01,888 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc8f6f4-493f-4e79-adc0-7d6e9115e03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:13:01,894 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc8f6f4-493f-4e79-adc0-7d6e9115e03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-26 00:13:02,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:13:02,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 645 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-26 00:13:02,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:13:02,172 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-26 00:13:02,172 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:13:02,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1957226889] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:13:02,173 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:13:02,173 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2022-11-26 00:13:02,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445985546] [2022-11-26 00:13:02,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:13:02,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-26 00:13:02,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:13:02,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-26 00:13:02,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-11-26 00:13:02,176 INFO L87 Difference]: Start difference. First operand 14779 states and 21277 transitions. Second operand has 6 states, 5 states have (on average 16.0) internal successors, (80), 6 states have internal predecessors, (80), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-26 00:13:04,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:13:04,216 INFO L93 Difference]: Finished difference Result 32795 states and 45831 transitions. [2022-11-26 00:13:04,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-26 00:13:04,217 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 16.0) internal successors, (80), 6 states have internal predecessors, (80), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 122 [2022-11-26 00:13:04,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:13:04,281 INFO L225 Difference]: With dead ends: 32795 [2022-11-26 00:13:04,282 INFO L226 Difference]: Without dead ends: 19663 [2022-11-26 00:13:04,305 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-11-26 00:13:04,306 INFO L413 NwaCegarLoop]: 3181 mSDtfsCounter, 3594 mSDsluCounter, 6295 mSDsCounter, 0 mSdLazyCounter, 784 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3607 SdHoareTripleChecker+Valid, 9476 SdHoareTripleChecker+Invalid, 891 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 784 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-26 00:13:04,306 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3607 Valid, 9476 Invalid, 891 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 784 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-26 00:13:04,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19663 states. [2022-11-26 00:13:05,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19663 to 19661. [2022-11-26 00:13:05,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19661 states, 16655 states have (on average 1.4428700090063045) internal successors, (24031), 16693 states have internal predecessors, (24031), 1756 states have call successors, (1756), 1248 states have call predecessors, (1756), 1248 states have return successors, (1756), 1720 states have call predecessors, (1756), 1756 states have call successors, (1756) [2022-11-26 00:13:05,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19661 states to 19661 states and 27543 transitions. [2022-11-26 00:13:05,415 INFO L78 Accepts]: Start accepts. Automaton has 19661 states and 27543 transitions. Word has length 122 [2022-11-26 00:13:05,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:13:05,415 INFO L495 AbstractCegarLoop]: Abstraction has 19661 states and 27543 transitions. [2022-11-26 00:13:05,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 16.0) internal successors, (80), 6 states have internal predecessors, (80), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-26 00:13:05,416 INFO L276 IsEmpty]: Start isEmpty. Operand 19661 states and 27543 transitions. [2022-11-26 00:13:05,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-11-26 00:13:05,447 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:13:05,447 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-26 00:13:05,459 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc8f6f4-493f-4e79-adc0-7d6e9115e03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-26 00:13:05,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc8f6f4-493f-4e79-adc0-7d6e9115e03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:13:05,653 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:13:05,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:13:05,654 INFO L85 PathProgramCache]: Analyzing trace with hash -1439808566, now seen corresponding path program 1 times [2022-11-26 00:13:05,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:13:05,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722710380] [2022-11-26 00:13:05,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:13:05,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:13:05,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:13:05,903 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 14 proven. 32 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-26 00:13:05,903 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:13:05,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722710380] [2022-11-26 00:13:05,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722710380] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:13:05,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329939739] [2022-11-26 00:13:05,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:13:05,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:13:05,904 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc8f6f4-493f-4e79-adc0-7d6e9115e03d/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:13:05,905 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc8f6f4-493f-4e79-adc0-7d6e9115e03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:13:05,926 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc8f6f4-493f-4e79-adc0-7d6e9115e03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-26 00:13:06,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:13:06,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 659 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-26 00:13:06,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:13:06,119 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 78 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-26 00:13:06,119 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:13:06,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [329939739] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:13:06,119 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:13:06,120 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-26 00:13:06,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096742747] [2022-11-26 00:13:06,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:13:06,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:13:06,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:13:06,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:13:06,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-26 00:13:06,122 INFO L87 Difference]: Start difference. First operand 19661 states and 27543 transitions. Second operand has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-26 00:13:07,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:13:07,842 INFO L93 Difference]: Finished difference Result 32603 states and 45621 transitions. [2022-11-26 00:13:07,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:13:07,843 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 125 [2022-11-26 00:13:07,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:13:07,907 INFO L225 Difference]: With dead ends: 32603 [2022-11-26 00:13:07,907 INFO L226 Difference]: Without dead ends: 19699 [2022-11-26 00:13:07,931 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-26 00:13:07,931 INFO L413 NwaCegarLoop]: 3254 mSDtfsCounter, 101 mSDsluCounter, 3161 mSDsCounter, 0 mSdLazyCounter, 491 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 6415 SdHoareTripleChecker+Invalid, 493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-26 00:13:07,932 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 6415 Invalid, 493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 491 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-26 00:13:07,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19699 states. [2022-11-26 00:13:08,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19699 to 19445. [2022-11-26 00:13:08,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19445 states, 16439 states have (on average 1.4238700650891174) internal successors, (23407), 16477 states have internal predecessors, (23407), 1756 states have call successors, (1756), 1248 states have call predecessors, (1756), 1248 states have return successors, (1756), 1720 states have call predecessors, (1756), 1756 states have call successors, (1756) [2022-11-26 00:13:09,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19445 states to 19445 states and 26919 transitions. [2022-11-26 00:13:09,009 INFO L78 Accepts]: Start accepts. Automaton has 19445 states and 26919 transitions. Word has length 125 [2022-11-26 00:13:09,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:13:09,010 INFO L495 AbstractCegarLoop]: Abstraction has 19445 states and 26919 transitions. [2022-11-26 00:13:09,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-26 00:13:09,010 INFO L276 IsEmpty]: Start isEmpty. Operand 19445 states and 26919 transitions. [2022-11-26 00:13:09,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-11-26 00:13:09,030 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:13:09,031 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:13:09,041 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc8f6f4-493f-4e79-adc0-7d6e9115e03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-26 00:13:09,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc8f6f4-493f-4e79-adc0-7d6e9115e03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-26 00:13:09,237 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:13:09,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:13:09,238 INFO L85 PathProgramCache]: Analyzing trace with hash -301142, now seen corresponding path program 1 times [2022-11-26 00:13:09,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:13:09,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784713350] [2022-11-26 00:13:09,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:13:09,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:13:09,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:13:09,453 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 14 proven. 30 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-26 00:13:09,453 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:13:09,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784713350] [2022-11-26 00:13:09,453 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784713350] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:13:09,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007426256] [2022-11-26 00:13:09,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:13:09,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:13:09,454 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc8f6f4-493f-4e79-adc0-7d6e9115e03d/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:13:09,455 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc8f6f4-493f-4e79-adc0-7d6e9115e03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:13:09,459 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc8f6f4-493f-4e79-adc0-7d6e9115e03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-26 00:13:09,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:13:09,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 665 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-26 00:13:09,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:13:09,690 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-26 00:13:09,690 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:13:09,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007426256] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:13:09,690 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:13:09,691 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2022-11-26 00:13:09,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535371041] [2022-11-26 00:13:09,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:13:09,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-26 00:13:09,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:13:09,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-26 00:13:09,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-26 00:13:09,693 INFO L87 Difference]: Start difference. First operand 19445 states and 26919 transitions. Second operand has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-26 00:13:11,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:13:11,207 INFO L93 Difference]: Finished difference Result 28427 states and 38917 transitions. [2022-11-26 00:13:11,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-26 00:13:11,208 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) Word has length 125 [2022-11-26 00:13:11,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:13:11,270 INFO L225 Difference]: With dead ends: 28427 [2022-11-26 00:13:11,271 INFO L226 Difference]: Without dead ends: 20213 [2022-11-26 00:13:11,291 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-11-26 00:13:11,291 INFO L413 NwaCegarLoop]: 3242 mSDtfsCounter, 3393 mSDsluCounter, 3333 mSDsCounter, 0 mSdLazyCounter, 525 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3393 SdHoareTripleChecker+Valid, 6575 SdHoareTripleChecker+Invalid, 528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 525 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-26 00:13:11,292 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3393 Valid, 6575 Invalid, 528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 525 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-26 00:13:11,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20213 states. [2022-11-26 00:13:12,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20213 to 19842. [2022-11-26 00:13:12,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19842 states, 16775 states have (on average 1.4193144560357676) internal successors, (23809), 16837 states have internal predecessors, (23809), 1764 states have call successors, (1764), 1253 states have call predecessors, (1764), 1301 states have return successors, (1812), 1752 states have call predecessors, (1812), 1764 states have call successors, (1812) [2022-11-26 00:13:12,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19842 states to 19842 states and 27385 transitions. [2022-11-26 00:13:12,433 INFO L78 Accepts]: Start accepts. Automaton has 19842 states and 27385 transitions. Word has length 125 [2022-11-26 00:13:12,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:13:12,433 INFO L495 AbstractCegarLoop]: Abstraction has 19842 states and 27385 transitions. [2022-11-26 00:13:12,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-26 00:13:12,434 INFO L276 IsEmpty]: Start isEmpty. Operand 19842 states and 27385 transitions. [2022-11-26 00:13:12,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-11-26 00:13:12,452 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:13:12,452 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:13:12,463 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc8f6f4-493f-4e79-adc0-7d6e9115e03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-26 00:13:12,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc8f6f4-493f-4e79-adc0-7d6e9115e03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-26 00:13:12,658 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:13:12,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:13:12,659 INFO L85 PathProgramCache]: Analyzing trace with hash 1652412741, now seen corresponding path program 1 times [2022-11-26 00:13:12,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:13:12,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115607173] [2022-11-26 00:13:12,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:13:12,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:13:12,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:13:13,019 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 14 proven. 31 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-11-26 00:13:13,019 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:13:13,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115607173] [2022-11-26 00:13:13,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115607173] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:13:13,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840267468] [2022-11-26 00:13:13,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:13:13,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:13:13,020 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc8f6f4-493f-4e79-adc0-7d6e9115e03d/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:13:13,021 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc8f6f4-493f-4e79-adc0-7d6e9115e03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:13:13,051 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc8f6f4-493f-4e79-adc0-7d6e9115e03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-26 00:13:13,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:13:13,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 664 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-26 00:13:13,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:13:13,215 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-26 00:13:13,215 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:13:13,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840267468] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:13:13,216 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:13:13,216 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-26 00:13:13,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310747652] [2022-11-26 00:13:13,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:13:13,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:13:13,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:13:13,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:13:13,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-26 00:13:13,221 INFO L87 Difference]: Start difference. First operand 19842 states and 27385 transitions. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-26 00:13:14,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:13:14,439 INFO L93 Difference]: Finished difference Result 27584 states and 37811 transitions. [2022-11-26 00:13:14,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:13:14,439 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 126 [2022-11-26 00:13:14,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:13:14,488 INFO L225 Difference]: With dead ends: 27584 [2022-11-26 00:13:14,488 INFO L226 Difference]: Without dead ends: 18818 [2022-11-26 00:13:14,509 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-26 00:13:14,510 INFO L413 NwaCegarLoop]: 3185 mSDtfsCounter, 28 mSDsluCounter, 3166 mSDsCounter, 0 mSdLazyCounter, 479 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 6351 SdHoareTripleChecker+Invalid, 479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-26 00:13:14,510 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 6351 Invalid, 479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 479 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-26 00:13:14,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18818 states. [2022-11-26 00:13:15,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18818 to 18190. [2022-11-26 00:13:15,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18190 states, 15339 states have (on average 1.42812438881283) internal successors, (21906), 15365 states have internal predecessors, (21906), 1680 states have call successors, (1680), 1169 states have call predecessors, (1680), 1169 states have return successors, (1680), 1656 states have call predecessors, (1680), 1680 states have call successors, (1680) [2022-11-26 00:13:15,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18190 states to 18190 states and 25266 transitions. [2022-11-26 00:13:15,675 INFO L78 Accepts]: Start accepts. Automaton has 18190 states and 25266 transitions. Word has length 126 [2022-11-26 00:13:15,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:13:15,675 INFO L495 AbstractCegarLoop]: Abstraction has 18190 states and 25266 transitions. [2022-11-26 00:13:15,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-26 00:13:15,675 INFO L276 IsEmpty]: Start isEmpty. Operand 18190 states and 25266 transitions. [2022-11-26 00:13:15,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-11-26 00:13:15,689 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:13:15,689 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:13:15,696 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc8f6f4-493f-4e79-adc0-7d6e9115e03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-26 00:13:15,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc8f6f4-493f-4e79-adc0-7d6e9115e03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-26 00:13:15,897 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:13:15,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:13:15,897 INFO L85 PathProgramCache]: Analyzing trace with hash 2055762802, now seen corresponding path program 1 times [2022-11-26 00:13:15,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:13:15,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828764341] [2022-11-26 00:13:15,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:13:15,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:13:15,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:13:16,113 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 15 proven. 31 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-26 00:13:16,113 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:13:16,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828764341] [2022-11-26 00:13:16,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828764341] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:13:16,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829749076] [2022-11-26 00:13:16,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:13:16,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:13:16,115 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc8f6f4-493f-4e79-adc0-7d6e9115e03d/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:13:16,116 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc8f6f4-493f-4e79-adc0-7d6e9115e03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:13:16,138 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc8f6f4-493f-4e79-adc0-7d6e9115e03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-26 00:13:16,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:13:16,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 669 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-26 00:13:16,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:13:16,360 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-26 00:13:16,360 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:13:16,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [829749076] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:13:16,360 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:13:16,360 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 7 [2022-11-26 00:13:16,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822573011] [2022-11-26 00:13:16,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:13:16,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-26 00:13:16,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:13:16,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-26 00:13:16,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-26 00:13:16,362 INFO L87 Difference]: Start difference. First operand 18190 states and 25266 transitions. Second operand has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-26 00:13:18,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:13:18,465 INFO L93 Difference]: Finished difference Result 40841 states and 55172 transitions. [2022-11-26 00:13:18,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-26 00:13:18,466 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 126 [2022-11-26 00:13:18,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:13:18,516 INFO L225 Difference]: With dead ends: 40841 [2022-11-26 00:13:18,516 INFO L226 Difference]: Without dead ends: 24343 [2022-11-26 00:13:18,547 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-11-26 00:13:18,547 INFO L413 NwaCegarLoop]: 3175 mSDtfsCounter, 6931 mSDsluCounter, 6254 mSDsCounter, 0 mSdLazyCounter, 758 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6944 SdHoareTripleChecker+Valid, 9429 SdHoareTripleChecker+Invalid, 889 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 758 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-26 00:13:18,549 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6944 Valid, 9429 Invalid, 889 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 758 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-26 00:13:18,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24343 states. [2022-11-26 00:13:20,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24343 to 24341. [2022-11-26 00:13:20,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24341 states, 20293 states have (on average 1.3842704380820974) internal successors, (28091), 20331 states have internal predecessors, (28091), 2391 states have call successors, (2391), 1655 states have call predecessors, (2391), 1655 states have return successors, (2391), 2355 states have call predecessors, (2391), 2391 states have call successors, (2391) [2022-11-26 00:13:20,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24341 states to 24341 states and 32873 transitions. [2022-11-26 00:13:20,647 INFO L78 Accepts]: Start accepts. Automaton has 24341 states and 32873 transitions. Word has length 126 [2022-11-26 00:13:20,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:13:20,648 INFO L495 AbstractCegarLoop]: Abstraction has 24341 states and 32873 transitions. [2022-11-26 00:13:20,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 states have internal predecessors, (80), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-26 00:13:20,648 INFO L276 IsEmpty]: Start isEmpty. Operand 24341 states and 32873 transitions. [2022-11-26 00:13:20,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-11-26 00:13:20,668 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:13:20,668 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:13:20,683 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc8f6f4-493f-4e79-adc0-7d6e9115e03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-26 00:13:20,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc8f6f4-493f-4e79-adc0-7d6e9115e03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-26 00:13:20,878 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:13:20,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:13:20,879 INFO L85 PathProgramCache]: Analyzing trace with hash 1383953008, now seen corresponding path program 1 times [2022-11-26 00:13:20,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:13:20,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601788650] [2022-11-26 00:13:20,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:13:20,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:13:20,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:13:21,100 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 17 proven. 31 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-26 00:13:21,100 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:13:21,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601788650] [2022-11-26 00:13:21,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601788650] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:13:21,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90881035] [2022-11-26 00:13:21,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:13:21,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:13:21,101 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc8f6f4-493f-4e79-adc0-7d6e9115e03d/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:13:21,102 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc8f6f4-493f-4e79-adc0-7d6e9115e03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:13:21,130 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc8f6f4-493f-4e79-adc0-7d6e9115e03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-26 00:13:21,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:13:21,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 683 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-26 00:13:21,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:13:21,374 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-26 00:13:21,374 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:13:21,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [90881035] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:13:21,375 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:13:21,375 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 7 [2022-11-26 00:13:21,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548944436] [2022-11-26 00:13:21,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:13:21,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-26 00:13:21,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:13:21,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-26 00:13:21,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-26 00:13:21,378 INFO L87 Difference]: Start difference. First operand 24341 states and 32873 transitions. Second operand has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-26 00:13:24,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:13:24,337 INFO L93 Difference]: Finished difference Result 55575 states and 73353 transitions. [2022-11-26 00:13:24,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-26 00:13:24,338 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 128 [2022-11-26 00:13:24,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:13:24,426 INFO L225 Difference]: With dead ends: 55575 [2022-11-26 00:13:24,426 INFO L226 Difference]: Without dead ends: 32926 [2022-11-26 00:13:24,457 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-11-26 00:13:24,458 INFO L413 NwaCegarLoop]: 3167 mSDtfsCounter, 3605 mSDsluCounter, 6297 mSDsCounter, 0 mSdLazyCounter, 782 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3618 SdHoareTripleChecker+Valid, 9464 SdHoareTripleChecker+Invalid, 897 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 782 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-26 00:13:24,459 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3618 Valid, 9464 Invalid, 897 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 782 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-26 00:13:24,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32926 states. [2022-11-26 00:13:26,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32926 to 32924. [2022-11-26 00:13:26,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32924 states, 27166 states have (on average 1.3439961716851947) internal successors, (36511), 27222 states have internal predecessors, (36511), 3408 states have call successors, (3408), 2348 states have call predecessors, (3408), 2348 states have return successors, (3408), 3354 states have call predecessors, (3408), 3408 states have call successors, (3408) [2022-11-26 00:13:26,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32924 states to 32924 states and 43327 transitions. [2022-11-26 00:13:26,895 INFO L78 Accepts]: Start accepts. Automaton has 32924 states and 43327 transitions. Word has length 128 [2022-11-26 00:13:26,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:13:26,896 INFO L495 AbstractCegarLoop]: Abstraction has 32924 states and 43327 transitions. [2022-11-26 00:13:26,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-26 00:13:26,897 INFO L276 IsEmpty]: Start isEmpty. Operand 32924 states and 43327 transitions. [2022-11-26 00:13:26,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-11-26 00:13:26,937 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:13:26,937 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:13:26,945 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc8f6f4-493f-4e79-adc0-7d6e9115e03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-11-26 00:13:27,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc8f6f4-493f-4e79-adc0-7d6e9115e03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:13:27,145 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:13:27,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:13:27,145 INFO L85 PathProgramCache]: Analyzing trace with hash -1916510862, now seen corresponding path program 1 times [2022-11-26 00:13:27,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:13:27,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620940576] [2022-11-26 00:13:27,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:13:27,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:13:27,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:13:27,360 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 37 proven. 13 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-26 00:13:27,361 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:13:27,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620940576] [2022-11-26 00:13:27,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620940576] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:13:27,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407587597] [2022-11-26 00:13:27,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:13:27,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:13:27,363 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc8f6f4-493f-4e79-adc0-7d6e9115e03d/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:13:27,364 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc8f6f4-493f-4e79-adc0-7d6e9115e03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:13:27,386 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc8f6f4-493f-4e79-adc0-7d6e9115e03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-26 00:13:27,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:13:27,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 697 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-26 00:13:27,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:13:27,631 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-26 00:13:27,632 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:13:27,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407587597] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:13:27,632 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:13:27,632 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 6 [2022-11-26 00:13:27,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410265570] [2022-11-26 00:13:27,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:13:27,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-26 00:13:27,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:13:27,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-26 00:13:27,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-26 00:13:27,634 INFO L87 Difference]: Start difference. First operand 32924 states and 43327 transitions. Second operand has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-26 00:13:31,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:13:31,134 INFO L93 Difference]: Finished difference Result 59534 states and 77874 transitions. [2022-11-26 00:13:31,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-26 00:13:31,134 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 130 [2022-11-26 00:13:31,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:13:31,228 INFO L225 Difference]: With dead ends: 59534 [2022-11-26 00:13:31,228 INFO L226 Difference]: Without dead ends: 38293 [2022-11-26 00:13:31,259 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-26 00:13:31,260 INFO L413 NwaCegarLoop]: 3192 mSDtfsCounter, 3356 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3356 SdHoareTripleChecker+Valid, 3228 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-26 00:13:31,260 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3356 Valid, 3228 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-26 00:13:31,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38293 states. [2022-11-26 00:13:34,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38293 to 37891. [2022-11-26 00:13:34,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37891 states, 31775 states have (on average 1.3173249409913454) internal successors, (41858), 31831 states have internal predecessors, (41858), 3465 states have call successors, (3465), 2649 states have call predecessors, (3465), 2649 states have return successors, (3723), 3411 states have call predecessors, (3723), 3465 states have call successors, (3723) [2022-11-26 00:13:34,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37891 states to 37891 states and 49046 transitions. [2022-11-26 00:13:34,587 INFO L78 Accepts]: Start accepts. Automaton has 37891 states and 49046 transitions. Word has length 130 [2022-11-26 00:13:34,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-26 00:13:34,587 INFO L495 AbstractCegarLoop]: Abstraction has 37891 states and 49046 transitions. [2022-11-26 00:13:34,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-26 00:13:34,587 INFO L276 IsEmpty]: Start isEmpty. Operand 37891 states and 49046 transitions. [2022-11-26 00:13:34,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-11-26 00:13:34,634 INFO L187 NwaCegarLoop]: Found error trace [2022-11-26 00:13:34,634 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-26 00:13:34,641 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc8f6f4-493f-4e79-adc0-7d6e9115e03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-26 00:13:34,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc8f6f4-493f-4e79-adc0-7d6e9115e03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:13:34,841 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-26 00:13:34,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-26 00:13:34,842 INFO L85 PathProgramCache]: Analyzing trace with hash 1759955272, now seen corresponding path program 1 times [2022-11-26 00:13:34,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-26 00:13:34,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192632843] [2022-11-26 00:13:34,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:13:34,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-26 00:13:34,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:13:35,278 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 46 proven. 20 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-26 00:13:35,278 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-26 00:13:35,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192632843] [2022-11-26 00:13:35,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192632843] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-26 00:13:35,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060347768] [2022-11-26 00:13:35,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-26 00:13:35,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-26 00:13:35,279 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc8f6f4-493f-4e79-adc0-7d6e9115e03d/bin/utaipan-ByfvJB40ur/z3 [2022-11-26 00:13:35,283 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc8f6f4-493f-4e79-adc0-7d6e9115e03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-26 00:13:35,284 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddc8f6f4-493f-4e79-adc0-7d6e9115e03d/bin/utaipan-ByfvJB40ur/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-26 00:13:35,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-26 00:13:35,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 695 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-26 00:13:35,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-26 00:13:35,537 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 88 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-26 00:13:35,537 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-26 00:13:35,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060347768] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-26 00:13:35,537 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-26 00:13:35,538 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 6 [2022-11-26 00:13:35,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744902984] [2022-11-26 00:13:35,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-26 00:13:35,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-26 00:13:35,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-26 00:13:35,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-26 00:13:35,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-26 00:13:35,540 INFO L87 Difference]: Start difference. First operand 37891 states and 49046 transitions. Second operand has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 5 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2022-11-26 00:13:40,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-26 00:13:40,381 INFO L93 Difference]: Finished difference Result 72706 states and 93468 transitions. [2022-11-26 00:13:40,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-26 00:13:40,382 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 5 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) Word has length 132 [2022-11-26 00:13:40,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-26 00:13:40,480 INFO L225 Difference]: With dead ends: 72706 [2022-11-26 00:13:40,480 INFO L226 Difference]: Without dead ends: 48153 [2022-11-26 00:13:40,506 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-11-26 00:13:40,507 INFO L413 NwaCegarLoop]: 3249 mSDtfsCounter, 222 mSDsluCounter, 9400 mSDsCounter, 0 mSdLazyCounter, 1075 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 12649 SdHoareTripleChecker+Invalid, 1130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 1075 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-26 00:13:40,507 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [238 Valid, 12649 Invalid, 1130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 1075 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-26 00:13:40,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48153 states.