./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label45+token_ring.04.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a 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_9a4f791b-7292-41e4-8317-5e22d48adf94/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a4f791b-7292-41e4-8317-5e22d48adf94/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a4f791b-7292-41e4-8317-5e22d48adf94/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a4f791b-7292-41e4-8317-5e22d48adf94/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label45+token_ring.04.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a4f791b-7292-41e4-8317-5e22d48adf94/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a4f791b-7292-41e4-8317-5e22d48adf94/bin/utaipan-7li7fVZpFI --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 546425dfb0e9d0673715f309b3c99445cd7a29ebb128e47cf94e5f13217a2c6c --- 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-5e519f3 [2022-11-03 01:40:56,805 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 01:40:56,807 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 01:40:56,844 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 01:40:56,844 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 01:40:56,848 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 01:40:56,851 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 01:40:56,854 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 01:40:56,857 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 01:40:56,865 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 01:40:56,866 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 01:40:56,868 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 01:40:56,869 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 01:40:56,871 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 01:40:56,873 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 01:40:56,875 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 01:40:56,877 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 01:40:56,878 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 01:40:56,879 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 01:40:56,886 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 01:40:56,889 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 01:40:56,890 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 01:40:56,893 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 01:40:56,895 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 01:40:56,906 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 01:40:56,907 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 01:40:56,908 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 01:40:56,910 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 01:40:56,910 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 01:40:56,911 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 01:40:56,912 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 01:40:56,914 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 01:40:56,916 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 01:40:56,918 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 01:40:56,919 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 01:40:56,919 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 01:40:56,920 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 01:40:56,920 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 01:40:56,920 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 01:40:56,921 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 01:40:56,922 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 01:40:56,923 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a4f791b-7292-41e4-8317-5e22d48adf94/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-03 01:40:56,957 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 01:40:56,958 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 01:40:56,958 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 01:40:56,958 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 01:40:56,959 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 01:40:56,959 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 01:40:56,959 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 01:40:56,959 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 01:40:56,960 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 01:40:56,960 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 01:40:56,960 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 01:40:56,960 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 01:40:56,960 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 01:40:56,960 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 01:40:56,961 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 01:40:56,961 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 01:40:56,961 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 01:40:56,961 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 01:40:56,962 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 01:40:56,962 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 01:40:56,962 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 01:40:56,962 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 01:40:56,963 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 01:40:56,963 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 01:40:56,963 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 01:40:56,963 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 01:40:56,963 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 01:40:56,963 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 01:40:56,964 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 01:40:56,964 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 01:40:56,964 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 01:40:56,964 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 01:40:56,964 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 01:40:56,965 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 01:40:56,965 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 01:40:56,965 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 01:40:56,965 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 01:40:56,965 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 01:40:56,965 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 01:40:56,966 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 01:40:56,966 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 01:40:56,966 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_9a4f791b-7292-41e4-8317-5e22d48adf94/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a4f791b-7292-41e4-8317-5e22d48adf94/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 546425dfb0e9d0673715f309b3c99445cd7a29ebb128e47cf94e5f13217a2c6c [2022-11-03 01:40:57,262 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 01:40:57,287 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 01:40:57,291 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 01:40:57,292 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 01:40:57,293 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 01:40:57,305 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a4f791b-7292-41e4-8317-5e22d48adf94/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/combinations/Problem05_label45+token_ring.04.cil-2.c [2022-11-03 01:40:57,375 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a4f791b-7292-41e4-8317-5e22d48adf94/bin/utaipan-7li7fVZpFI/data/7acd0dc81/6da3355aeec342a995057022da0e9b32/FLAGcdb543b82 [2022-11-03 01:40:58,451 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 01:40:58,452 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a4f791b-7292-41e4-8317-5e22d48adf94/sv-benchmarks/c/combinations/Problem05_label45+token_ring.04.cil-2.c [2022-11-03 01:40:58,494 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a4f791b-7292-41e4-8317-5e22d48adf94/bin/utaipan-7li7fVZpFI/data/7acd0dc81/6da3355aeec342a995057022da0e9b32/FLAGcdb543b82 [2022-11-03 01:40:58,731 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a4f791b-7292-41e4-8317-5e22d48adf94/bin/utaipan-7li7fVZpFI/data/7acd0dc81/6da3355aeec342a995057022da0e9b32 [2022-11-03 01:40:58,733 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 01:40:58,735 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 01:40:58,736 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 01:40:58,736 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 01:40:58,740 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 01:40:58,741 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:40:58" (1/1) ... [2022-11-03 01:40:58,742 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2cc85a2e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:40:58, skipping insertion in model container [2022-11-03 01:40:58,742 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:40:58" (1/1) ... [2022-11-03 01:40:58,749 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 01:40:58,973 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 01:41:01,356 WARN L230 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_9a4f791b-7292-41e4-8317-5e22d48adf94/sv-benchmarks/c/combinations/Problem05_label45+token_ring.04.cil-2.c[380323,380336] [2022-11-03 01:41:01,383 WARN L230 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_9a4f791b-7292-41e4-8317-5e22d48adf94/sv-benchmarks/c/combinations/Problem05_label45+token_ring.04.cil-2.c[383339,383352] [2022-11-03 01:41:01,589 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:41:01,598 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 01:41:02,808 WARN L230 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_9a4f791b-7292-41e4-8317-5e22d48adf94/sv-benchmarks/c/combinations/Problem05_label45+token_ring.04.cil-2.c[380323,380336] [2022-11-03 01:41:02,815 WARN L230 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_9a4f791b-7292-41e4-8317-5e22d48adf94/sv-benchmarks/c/combinations/Problem05_label45+token_ring.04.cil-2.c[383339,383352] [2022-11-03 01:41:02,828 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:41:02,907 INFO L208 MainTranslator]: Completed translation [2022-11-03 01:41:02,907 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:41:02 WrapperNode [2022-11-03 01:41:02,908 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 01:41:02,909 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 01:41:02,909 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 01:41:02,910 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 01:41:02,918 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:41:02" (1/1) ... [2022-11-03 01:41:03,000 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:41:02" (1/1) ... [2022-11-03 01:41:03,479 INFO L138 Inliner]: procedures = 52, calls = 54, calls flagged for inlining = 29, calls inlined = 29, statements flattened = 12740 [2022-11-03 01:41:03,479 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 01:41:03,481 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 01:41:03,481 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 01:41:03,481 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 01:41:03,491 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:41:02" (1/1) ... [2022-11-03 01:41:03,492 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:41:02" (1/1) ... [2022-11-03 01:41:03,542 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:41:02" (1/1) ... [2022-11-03 01:41:03,543 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:41:02" (1/1) ... [2022-11-03 01:41:03,694 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:41:02" (1/1) ... [2022-11-03 01:41:03,731 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:41:02" (1/1) ... [2022-11-03 01:41:03,841 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:41:02" (1/1) ... [2022-11-03 01:41:03,861 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:41:02" (1/1) ... [2022-11-03 01:41:03,921 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 01:41:03,922 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 01:41:03,922 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 01:41:03,922 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 01:41:03,923 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:41:02" (1/1) ... [2022-11-03 01:41:03,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 01:41:03,962 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a4f791b-7292-41e4-8317-5e22d48adf94/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:41:03,996 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a4f791b-7292-41e4-8317-5e22d48adf94/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 01:41:04,058 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a4f791b-7292-41e4-8317-5e22d48adf94/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 01:41:04,125 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 01:41:04,125 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2022-11-03 01:41:04,126 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2022-11-03 01:41:04,126 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-11-03 01:41:04,126 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-11-03 01:41:04,126 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2022-11-03 01:41:04,126 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2022-11-03 01:41:04,126 INFO L130 BoogieDeclarations]: Found specification of procedure error [2022-11-03 01:41:04,127 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2022-11-03 01:41:04,127 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2022-11-03 01:41:04,127 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2022-11-03 01:41:04,127 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2022-11-03 01:41:04,127 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2022-11-03 01:41:04,127 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2022-11-03 01:41:04,128 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2022-11-03 01:41:04,128 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 01:41:04,128 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 01:41:04,128 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 01:41:04,333 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 01:41:04,335 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 01:41:13,464 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 01:41:15,445 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 01:41:15,445 INFO L300 CfgBuilder]: Removed 8 assume(true) statements. [2022-11-03 01:41:15,451 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:41:15 BoogieIcfgContainer [2022-11-03 01:41:15,451 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 01:41:15,453 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 01:41:15,454 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 01:41:15,457 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 01:41:15,458 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 01:40:58" (1/3) ... [2022-11-03 01:41:15,458 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67ce54d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:41:15, skipping insertion in model container [2022-11-03 01:41:15,459 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:41:02" (2/3) ... [2022-11-03 01:41:15,459 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67ce54d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:41:15, skipping insertion in model container [2022-11-03 01:41:15,459 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:41:15" (3/3) ... [2022-11-03 01:41:15,461 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem05_label45+token_ring.04.cil-2.c [2022-11-03 01:41:15,480 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 01:41:15,481 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-03 01:41:15,646 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 01:41:15,653 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;@264009c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 01:41:15,654 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-03 01:41:15,664 INFO L276 IsEmpty]: Start isEmpty. Operand has 1749 states, 1719 states have (on average 1.9726585223967423) internal successors, (3391), 1724 states have internal predecessors, (3391), 20 states have call successors, (20), 7 states have call predecessors, (20), 7 states have return successors, (20), 19 states have call predecessors, (20), 20 states have call successors, (20) [2022-11-03 01:41:15,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-03 01:41:15,675 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:41:15,676 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:41:15,676 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:41:15,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:41:15,682 INFO L85 PathProgramCache]: Analyzing trace with hash -1047655575, now seen corresponding path program 1 times [2022-11-03 01:41:15,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:41:15,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083954392] [2022-11-03 01:41:15,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:41:15,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:41:15,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:41:16,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:41:16,151 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:41:16,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083954392] [2022-11-03 01:41:16,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083954392] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:41:16,153 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:41:16,153 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:41:16,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774667619] [2022-11-03 01:41:16,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:41:16,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:41:16,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:41:16,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:41:16,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-03 01:41:16,194 INFO L87 Difference]: Start difference. First operand has 1749 states, 1719 states have (on average 1.9726585223967423) internal successors, (3391), 1724 states have internal predecessors, (3391), 20 states have call successors, (20), 7 states have call predecessors, (20), 7 states have return successors, (20), 19 states have call predecessors, (20), 20 states have call successors, (20) 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, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-03 01:41:17,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:41:17,372 INFO L93 Difference]: Finished difference Result 3580 states and 6999 transitions. [2022-11-03 01:41:17,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 01:41:17,374 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, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 44 [2022-11-03 01:41:17,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:41:17,400 INFO L225 Difference]: With dead ends: 3580 [2022-11-03 01:41:17,400 INFO L226 Difference]: Without dead ends: 1830 [2022-11-03 01:41:17,411 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 [2022-11-03 01:41:17,415 INFO L413 NwaCegarLoop]: 3278 mSDtfsCounter, 3523 mSDsluCounter, 3471 mSDsCounter, 0 mSdLazyCounter, 602 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3523 SdHoareTripleChecker+Valid, 6488 SdHoareTripleChecker+Invalid, 616 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 602 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-03 01:41:17,416 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3523 Valid, 6488 Invalid, 616 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 602 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-03 01:41:17,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1830 states. [2022-11-03 01:41:17,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1830 to 1829. [2022-11-03 01:41:17,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1829 states, 1781 states have (on average 1.948343627175744) internal successors, (3470), 1785 states have internal predecessors, (3470), 34 states have call successors, (34), 13 states have call predecessors, (34), 12 states have return successors, (32), 31 states have call predecessors, (32), 32 states have call successors, (32) [2022-11-03 01:41:17,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1829 states to 1829 states and 3536 transitions. [2022-11-03 01:41:17,570 INFO L78 Accepts]: Start accepts. Automaton has 1829 states and 3536 transitions. Word has length 44 [2022-11-03 01:41:17,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:41:17,571 INFO L495 AbstractCegarLoop]: Abstraction has 1829 states and 3536 transitions. [2022-11-03 01:41:17,571 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, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-03 01:41:17,572 INFO L276 IsEmpty]: Start isEmpty. Operand 1829 states and 3536 transitions. [2022-11-03 01:41:17,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-11-03 01:41:17,588 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:41:17,589 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, 1] [2022-11-03 01:41:17,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 01:41:17,590 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:41:17,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:41:17,590 INFO L85 PathProgramCache]: Analyzing trace with hash 1296212356, now seen corresponding path program 1 times [2022-11-03 01:41:17,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:41:17,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755942454] [2022-11-03 01:41:17,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:41:17,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:41:17,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:41:17,936 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 01:41:17,937 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:41:17,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755942454] [2022-11-03 01:41:17,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755942454] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:41:17,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725817232] [2022-11-03 01:41:17,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:41:17,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:41:17,939 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a4f791b-7292-41e4-8317-5e22d48adf94/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:41:17,941 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a4f791b-7292-41e4-8317-5e22d48adf94/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:41:17,957 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a4f791b-7292-41e4-8317-5e22d48adf94/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 01:41:18,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:41:18,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 499 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 01:41:18,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:41:18,228 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 01:41:18,228 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:41:18,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [725817232] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:41:18,231 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 01:41:18,232 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-03 01:41:18,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139011711] [2022-11-03 01:41:18,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:41:18,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:41:18,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:41:18,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:41:18,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:41:18,241 INFO L87 Difference]: Start difference. First operand 1829 states and 3536 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, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 01:41:18,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:41:18,775 INFO L93 Difference]: Finished difference Result 2188 states and 4059 transitions. [2022-11-03 01:41:18,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:41:18,776 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, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 81 [2022-11-03 01:41:18,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:41:18,788 INFO L225 Difference]: With dead ends: 2188 [2022-11-03 01:41:18,789 INFO L226 Difference]: Without dead ends: 2005 [2022-11-03 01:41:18,791 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:41:18,792 INFO L413 NwaCegarLoop]: 3221 mSDtfsCounter, 3389 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3389 SdHoareTripleChecker+Valid, 3333 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 01:41:18,793 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3389 Valid, 3333 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 01:41:18,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2005 states. [2022-11-03 01:41:18,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2005 to 1999. [2022-11-03 01:41:18,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1999 states, 1913 states have (on average 1.9116570831155253) internal successors, (3657), 1918 states have internal predecessors, (3657), 60 states have call successors, (60), 25 states have call predecessors, (60), 24 states have return successors, (58), 56 states have call predecessors, (58), 58 states have call successors, (58) [2022-11-03 01:41:18,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1999 states to 1999 states and 3775 transitions. [2022-11-03 01:41:18,877 INFO L78 Accepts]: Start accepts. Automaton has 1999 states and 3775 transitions. Word has length 81 [2022-11-03 01:41:18,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:41:18,877 INFO L495 AbstractCegarLoop]: Abstraction has 1999 states and 3775 transitions. [2022-11-03 01:41:18,878 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, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 01:41:18,878 INFO L276 IsEmpty]: Start isEmpty. Operand 1999 states and 3775 transitions. [2022-11-03 01:41:18,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-11-03 01:41:18,880 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:41:18,881 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, 1] [2022-11-03 01:41:18,925 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a4f791b-7292-41e4-8317-5e22d48adf94/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-03 01:41:19,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a4f791b-7292-41e4-8317-5e22d48adf94/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:41:19,095 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:41:19,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:41:19,095 INFO L85 PathProgramCache]: Analyzing trace with hash 2016305508, now seen corresponding path program 1 times [2022-11-03 01:41:19,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:41:19,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823378058] [2022-11-03 01:41:19,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:41:19,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:41:19,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:41:19,303 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-03 01:41:19,303 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:41:19,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823378058] [2022-11-03 01:41:19,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823378058] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:41:19,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851825782] [2022-11-03 01:41:19,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:41:19,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:41:19,304 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a4f791b-7292-41e4-8317-5e22d48adf94/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:41:19,305 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a4f791b-7292-41e4-8317-5e22d48adf94/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:41:19,326 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a4f791b-7292-41e4-8317-5e22d48adf94/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 01:41:19,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:41:19,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 493 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 01:41:19,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:41:19,511 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 01:41:19,511 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:41:19,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1851825782] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:41:19,512 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 01:41:19,512 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-03 01:41:19,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903017302] [2022-11-03 01:41:19,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:41:19,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:41:19,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:41:19,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:41:19,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:41:19,515 INFO L87 Difference]: Start difference. First operand 1999 states and 3775 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, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 01:41:20,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:41:20,047 INFO L93 Difference]: Finished difference Result 2692 states and 4778 transitions. [2022-11-03 01:41:20,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:41:20,048 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, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 81 [2022-11-03 01:41:20,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:41:20,061 INFO L225 Difference]: With dead ends: 2692 [2022-11-03 01:41:20,061 INFO L226 Difference]: Without dead ends: 2339 [2022-11-03 01:41:20,064 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:41:20,065 INFO L413 NwaCegarLoop]: 3220 mSDtfsCounter, 3392 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3392 SdHoareTripleChecker+Valid, 3332 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 01:41:20,066 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3392 Valid, 3332 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 01:41:20,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2339 states. [2022-11-03 01:41:20,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2339 to 2331. [2022-11-03 01:41:20,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2331 states, 2171 states have (on average 1.8512206356517733) internal successors, (4019), 2178 states have internal predecessors, (4019), 110 states have call successors, (110), 49 states have call predecessors, (110), 48 states have return successors, (108), 104 states have call predecessors, (108), 108 states have call successors, (108) [2022-11-03 01:41:20,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2331 states to 2331 states and 4237 transitions. [2022-11-03 01:41:20,174 INFO L78 Accepts]: Start accepts. Automaton has 2331 states and 4237 transitions. Word has length 81 [2022-11-03 01:41:20,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:41:20,175 INFO L495 AbstractCegarLoop]: Abstraction has 2331 states and 4237 transitions. [2022-11-03 01:41:20,175 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, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-03 01:41:20,175 INFO L276 IsEmpty]: Start isEmpty. Operand 2331 states and 4237 transitions. [2022-11-03 01:41:20,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-11-03 01:41:20,179 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:41:20,179 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, 1] [2022-11-03 01:41:20,223 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a4f791b-7292-41e4-8317-5e22d48adf94/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-03 01:41:20,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a4f791b-7292-41e4-8317-5e22d48adf94/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:41:20,395 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:41:20,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:41:20,395 INFO L85 PathProgramCache]: Analyzing trace with hash 949753220, now seen corresponding path program 1 times [2022-11-03 01:41:20,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:41:20,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791944748] [2022-11-03 01:41:20,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:41:20,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:41:20,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:41:20,554 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-03 01:41:20,554 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:41:20,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791944748] [2022-11-03 01:41:20,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791944748] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:41:20,560 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:41:20,560 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 01:41:20,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806619915] [2022-11-03 01:41:20,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:41:20,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:41:20,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:41:20,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:41:20,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:41:20,565 INFO L87 Difference]: Start difference. First operand 2331 states and 4237 transitions. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-03 01:41:21,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:41:21,214 INFO L93 Difference]: Finished difference Result 2867 states and 5012 transitions. [2022-11-03 01:41:21,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:41:21,215 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), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 81 [2022-11-03 01:41:21,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:41:21,232 INFO L225 Difference]: With dead ends: 2867 [2022-11-03 01:41:21,232 INFO L226 Difference]: Without dead ends: 2507 [2022-11-03 01:41:21,235 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 [2022-11-03 01:41:21,238 INFO L413 NwaCegarLoop]: 3235 mSDtfsCounter, 55 mSDsluCounter, 3414 mSDsCounter, 0 mSdLazyCounter, 490 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 6416 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 [2022-11-03 01:41:21,239 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 6416 Invalid, 490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 490 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 01:41:21,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2507 states. [2022-11-03 01:41:21,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2507 to 2435. [2022-11-03 01:41:21,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2435 states, 2267 states have (on average 1.843405381561535) internal successors, (4179), 2274 states have internal predecessors, (4179), 114 states have call successors, (114), 53 states have call predecessors, (114), 52 states have return successors, (112), 108 states have call predecessors, (112), 112 states have call successors, (112) [2022-11-03 01:41:21,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2435 states to 2435 states and 4405 transitions. [2022-11-03 01:41:21,375 INFO L78 Accepts]: Start accepts. Automaton has 2435 states and 4405 transitions. Word has length 81 [2022-11-03 01:41:21,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:41:21,377 INFO L495 AbstractCegarLoop]: Abstraction has 2435 states and 4405 transitions. [2022-11-03 01:41:21,377 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), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-03 01:41:21,377 INFO L276 IsEmpty]: Start isEmpty. Operand 2435 states and 4405 transitions. [2022-11-03 01:41:21,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-11-03 01:41:21,383 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:41:21,386 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, 1] [2022-11-03 01:41:21,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-03 01:41:21,387 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:41:21,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:41:21,388 INFO L85 PathProgramCache]: Analyzing trace with hash -742765466, now seen corresponding path program 1 times [2022-11-03 01:41:21,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:41:21,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377428960] [2022-11-03 01:41:21,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:41:21,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:41:21,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:41:21,506 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-11-03 01:41:21,507 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:41:21,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377428960] [2022-11-03 01:41:21,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377428960] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:41:21,507 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:41:21,507 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 01:41:21,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307311458] [2022-11-03 01:41:21,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:41:21,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:41:21,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:41:21,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:41:21,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:41:21,510 INFO L87 Difference]: Start difference. First operand 2435 states and 4405 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, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-03 01:41:22,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:41:22,248 INFO L93 Difference]: Finished difference Result 3976 states and 6646 transitions. [2022-11-03 01:41:22,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:41:22,249 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, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 107 [2022-11-03 01:41:22,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:41:22,265 INFO L225 Difference]: With dead ends: 3976 [2022-11-03 01:41:22,266 INFO L226 Difference]: Without dead ends: 3187 [2022-11-03 01:41:22,269 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 [2022-11-03 01:41:22,270 INFO L413 NwaCegarLoop]: 3203 mSDtfsCounter, 3383 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3383 SdHoareTripleChecker+Valid, 3315 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 01:41:22,270 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3383 Valid, 3315 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-03 01:41:22,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3187 states. [2022-11-03 01:41:22,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3187 to 3171. [2022-11-03 01:41:22,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3171 states, 2851 states have (on average 1.7562258856541564) internal successors, (5007), 2862 states have internal predecessors, (5007), 214 states have call successors, (214), 105 states have call predecessors, (214), 104 states have return successors, (212), 204 states have call predecessors, (212), 212 states have call successors, (212) [2022-11-03 01:41:22,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3171 states to 3171 states and 5433 transitions. [2022-11-03 01:41:22,407 INFO L78 Accepts]: Start accepts. Automaton has 3171 states and 5433 transitions. Word has length 107 [2022-11-03 01:41:22,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:41:22,408 INFO L495 AbstractCegarLoop]: Abstraction has 3171 states and 5433 transitions. [2022-11-03 01:41:22,408 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, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-03 01:41:22,408 INFO L276 IsEmpty]: Start isEmpty. Operand 3171 states and 5433 transitions. [2022-11-03 01:41:22,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-11-03 01:41:22,415 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:41:22,415 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, 1] [2022-11-03 01:41:22,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-03 01:41:22,416 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:41:22,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:41:22,417 INFO L85 PathProgramCache]: Analyzing trace with hash -1260594573, now seen corresponding path program 1 times [2022-11-03 01:41:22,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:41:22,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776139472] [2022-11-03 01:41:22,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:41:22,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:41:22,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:41:22,516 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-11-03 01:41:22,516 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:41:22,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776139472] [2022-11-03 01:41:22,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776139472] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:41:22,517 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:41:22,517 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 01:41:22,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678275758] [2022-11-03 01:41:22,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:41:22,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:41:22,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:41:22,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:41:22,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:41:22,519 INFO L87 Difference]: Start difference. First operand 3171 states and 5433 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, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-03 01:41:23,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:41:23,137 INFO L93 Difference]: Finished difference Result 6148 states and 9706 transitions. [2022-11-03 01:41:23,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:41:23,138 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, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 107 [2022-11-03 01:41:23,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:41:23,160 INFO L225 Difference]: With dead ends: 6148 [2022-11-03 01:41:23,160 INFO L226 Difference]: Without dead ends: 4623 [2022-11-03 01:41:23,168 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 [2022-11-03 01:41:23,169 INFO L413 NwaCegarLoop]: 3212 mSDtfsCounter, 3386 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3386 SdHoareTripleChecker+Valid, 3324 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 01:41:23,169 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3386 Valid, 3324 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 01:41:23,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4623 states. [2022-11-03 01:41:23,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4623 to 4595. [2022-11-03 01:41:23,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4595 states, 3979 states have (on average 1.6544357878864036) internal successors, (6583), 3998 states have internal predecessors, (6583), 406 states have call successors, (406), 209 states have call predecessors, (406), 208 states have return successors, (404), 388 states have call predecessors, (404), 404 states have call successors, (404) [2022-11-03 01:41:23,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4595 states to 4595 states and 7393 transitions. [2022-11-03 01:41:23,397 INFO L78 Accepts]: Start accepts. Automaton has 4595 states and 7393 transitions. Word has length 107 [2022-11-03 01:41:23,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:41:23,397 INFO L495 AbstractCegarLoop]: Abstraction has 4595 states and 7393 transitions. [2022-11-03 01:41:23,398 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, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-03 01:41:23,398 INFO L276 IsEmpty]: Start isEmpty. Operand 4595 states and 7393 transitions. [2022-11-03 01:41:23,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-03 01:41:23,410 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:41:23,410 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:41:23,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-03 01:41:23,411 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:41:23,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:41:23,411 INFO L85 PathProgramCache]: Analyzing trace with hash 364148043, now seen corresponding path program 1 times [2022-11-03 01:41:23,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:41:23,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561510004] [2022-11-03 01:41:23,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:41:23,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:41:23,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:41:23,770 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 10 proven. 33 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-03 01:41:23,770 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:41:23,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561510004] [2022-11-03 01:41:23,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561510004] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:41:23,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694514416] [2022-11-03 01:41:23,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:41:23,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:41:23,771 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a4f791b-7292-41e4-8317-5e22d48adf94/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:41:23,772 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a4f791b-7292-41e4-8317-5e22d48adf94/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:41:23,798 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a4f791b-7292-41e4-8317-5e22d48adf94/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 01:41:23,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:41:23,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 654 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 01:41:23,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:41:24,019 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-03 01:41:24,019 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:41:24,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1694514416] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:41:24,019 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 01:41:24,020 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-03 01:41:24,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58512858] [2022-11-03 01:41:24,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:41:24,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:41:24,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:41:24,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:41:24,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-03 01:41:24,022 INFO L87 Difference]: Start difference. First operand 4595 states and 7393 transitions. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-03 01:41:24,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:41:24,956 INFO L93 Difference]: Finished difference Result 6139 states and 9671 transitions. [2022-11-03 01:41:24,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:41:24,957 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 124 [2022-11-03 01:41:24,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:41:24,992 INFO L225 Difference]: With dead ends: 6139 [2022-11-03 01:41:24,992 INFO L226 Difference]: Without dead ends: 4615 [2022-11-03 01:41:24,999 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-03 01:41:25,000 INFO L413 NwaCegarLoop]: 3263 mSDtfsCounter, 113 mSDsluCounter, 3404 mSDsCounter, 0 mSdLazyCounter, 496 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 6433 SdHoareTripleChecker+Invalid, 498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 01:41:25,001 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 6433 Invalid, 498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 496 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 01:41:25,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4615 states. [2022-11-03 01:41:25,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4615 to 4579. [2022-11-03 01:41:25,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4579 states, 3963 states have (on average 1.640928589452435) internal successors, (6503), 3982 states have internal predecessors, (6503), 406 states have call successors, (406), 209 states have call predecessors, (406), 208 states have return successors, (404), 388 states have call predecessors, (404), 404 states have call successors, (404) [2022-11-03 01:41:25,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4579 states to 4579 states and 7313 transitions. [2022-11-03 01:41:25,215 INFO L78 Accepts]: Start accepts. Automaton has 4579 states and 7313 transitions. Word has length 124 [2022-11-03 01:41:25,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:41:25,215 INFO L495 AbstractCegarLoop]: Abstraction has 4579 states and 7313 transitions. [2022-11-03 01:41:25,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-03 01:41:25,216 INFO L276 IsEmpty]: Start isEmpty. Operand 4579 states and 7313 transitions. [2022-11-03 01:41:25,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-03 01:41:25,226 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:41:25,226 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:41:25,267 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a4f791b-7292-41e4-8317-5e22d48adf94/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-03 01:41:25,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a4f791b-7292-41e4-8317-5e22d48adf94/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:41:25,454 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:41:25,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:41:25,455 INFO L85 PathProgramCache]: Analyzing trace with hash -1967190835, now seen corresponding path program 1 times [2022-11-03 01:41:25,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:41:25,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330882326] [2022-11-03 01:41:25,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:41:25,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:41:25,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:41:25,781 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 10 proven. 31 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-03 01:41:25,781 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:41:25,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330882326] [2022-11-03 01:41:25,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330882326] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:41:25,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775716150] [2022-11-03 01:41:25,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:41:25,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:41:25,782 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a4f791b-7292-41e4-8317-5e22d48adf94/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:41:25,783 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a4f791b-7292-41e4-8317-5e22d48adf94/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:41:25,809 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a4f791b-7292-41e4-8317-5e22d48adf94/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-03 01:41:25,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:41:25,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 660 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 01:41:25,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:41:26,008 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-03 01:41:26,008 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:41:26,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1775716150] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:41:26,009 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 01:41:26,009 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-03 01:41:26,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381147453] [2022-11-03 01:41:26,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:41:26,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:41:26,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:41:26,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:41:26,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-03 01:41:26,011 INFO L87 Difference]: Start difference. First operand 4579 states and 7313 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-03 01:41:26,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:41:26,578 INFO L93 Difference]: Finished difference Result 6793 states and 10278 transitions. [2022-11-03 01:41:26,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:41:26,579 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 124 [2022-11-03 01:41:26,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:41:26,624 INFO L225 Difference]: With dead ends: 6793 [2022-11-03 01:41:26,624 INFO L226 Difference]: Without dead ends: 5293 [2022-11-03 01:41:26,632 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-03 01:41:26,632 INFO L413 NwaCegarLoop]: 3192 mSDtfsCounter, 3392 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3392 SdHoareTripleChecker+Valid, 3221 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 01:41:26,633 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3392 Valid, 3221 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 01:41:26,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5293 states. [2022-11-03 01:41:26,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5293 to 5293. [2022-11-03 01:41:26,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5293 states, 4585 states have (on average 1.5784078516902944) internal successors, (7237), 4604 states have internal predecessors, (7237), 436 states have call successors, (436), 271 states have call predecessors, (436), 270 states have return successors, (434), 418 states have call predecessors, (434), 434 states have call successors, (434) [2022-11-03 01:41:26,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5293 states to 5293 states and 8107 transitions. [2022-11-03 01:41:26,878 INFO L78 Accepts]: Start accepts. Automaton has 5293 states and 8107 transitions. Word has length 124 [2022-11-03 01:41:26,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:41:26,880 INFO L495 AbstractCegarLoop]: Abstraction has 5293 states and 8107 transitions. [2022-11-03 01:41:26,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-03 01:41:26,881 INFO L276 IsEmpty]: Start isEmpty. Operand 5293 states and 8107 transitions. [2022-11-03 01:41:26,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-11-03 01:41:26,893 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:41:26,894 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] [2022-11-03 01:41:26,931 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a4f791b-7292-41e4-8317-5e22d48adf94/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-03 01:41:27,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a4f791b-7292-41e4-8317-5e22d48adf94/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:41:27,115 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:41:27,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:41:27,116 INFO L85 PathProgramCache]: Analyzing trace with hash -1615843858, now seen corresponding path program 1 times [2022-11-03 01:41:27,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:41:27,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28221321] [2022-11-03 01:41:27,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:41:27,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:41:27,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:41:27,537 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 10 proven. 31 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-03 01:41:27,537 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:41:27,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28221321] [2022-11-03 01:41:27,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28221321] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:41:27,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429470812] [2022-11-03 01:41:27,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:41:27,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:41:27,539 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a4f791b-7292-41e4-8317-5e22d48adf94/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:41:27,540 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a4f791b-7292-41e4-8317-5e22d48adf94/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:41:27,562 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a4f791b-7292-41e4-8317-5e22d48adf94/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-03 01:41:27,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:41:27,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 646 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 01:41:27,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:41:27,755 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-03 01:41:27,755 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:41:27,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429470812] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:41:27,755 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 01:41:27,756 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-03 01:41:27,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651804875] [2022-11-03 01:41:27,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:41:27,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:41:27,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:41:27,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:41:27,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-03 01:41:27,758 INFO L87 Difference]: Start difference. First operand 5293 states and 8107 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, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-03 01:41:28,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:41:28,561 INFO L93 Difference]: Finished difference Result 10233 states and 14820 transitions. [2022-11-03 01:41:28,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:41:28,562 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, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 121 [2022-11-03 01:41:28,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:41:28,598 INFO L225 Difference]: With dead ends: 10233 [2022-11-03 01:41:28,599 INFO L226 Difference]: Without dead ends: 6587 [2022-11-03 01:41:28,611 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 [2022-11-03 01:41:28,614 INFO L413 NwaCegarLoop]: 3199 mSDtfsCounter, 66 mSDsluCounter, 3397 mSDsCounter, 0 mSdLazyCounter, 478 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 6365 SdHoareTripleChecker+Invalid, 480 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 478 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 01:41:28,615 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 6365 Invalid, 480 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 478 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 01:41:28,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6587 states. [2022-11-03 01:41:28,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6587 to 5669. [2022-11-03 01:41:28,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5669 states, 4925 states have (on average 1.5807106598984773) internal successors, (7785), 4945 states have internal predecessors, (7785), 454 states have call successors, (454), 289 states have call predecessors, (454), 288 states have return successors, (452), 435 states have call predecessors, (452), 452 states have call successors, (452) [2022-11-03 01:41:28,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5669 states to 5669 states and 8691 transitions. [2022-11-03 01:41:28,913 INFO L78 Accepts]: Start accepts. Automaton has 5669 states and 8691 transitions. Word has length 121 [2022-11-03 01:41:28,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:41:28,914 INFO L495 AbstractCegarLoop]: Abstraction has 5669 states and 8691 transitions. [2022-11-03 01:41:28,914 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, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-03 01:41:28,915 INFO L276 IsEmpty]: Start isEmpty. Operand 5669 states and 8691 transitions. [2022-11-03 01:41:28,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-11-03 01:41:28,928 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:41:28,928 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] [2022-11-03 01:41:28,970 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a4f791b-7292-41e4-8317-5e22d48adf94/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-03 01:41:29,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a4f791b-7292-41e4-8317-5e22d48adf94/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:41:29,142 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:41:29,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:41:29,143 INFO L85 PathProgramCache]: Analyzing trace with hash 1894156591, now seen corresponding path program 2 times [2022-11-03 01:41:29,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:41:29,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138456339] [2022-11-03 01:41:29,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:41:29,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:41:29,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:41:29,283 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-11-03 01:41:29,283 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:41:29,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138456339] [2022-11-03 01:41:29,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138456339] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:41:29,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825721568] [2022-11-03 01:41:29,284 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 01:41:29,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:41:29,284 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a4f791b-7292-41e4-8317-5e22d48adf94/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:41:29,285 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a4f791b-7292-41e4-8317-5e22d48adf94/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:41:29,306 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a4f791b-7292-41e4-8317-5e22d48adf94/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-03 01:41:29,460 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-03 01:41:29,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:41:29,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 643 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 01:41:29,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:41:29,492 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-03 01:41:29,492 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:41:29,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825721568] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:41:29,493 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 01:41:29,493 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-03 01:41:29,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417053710] [2022-11-03 01:41:29,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:41:29,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:41:29,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:41:29,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:41:29,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:41:29,495 INFO L87 Difference]: Start difference. First operand 5669 states and 8691 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, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-03 01:41:30,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:41:30,261 INFO L93 Difference]: Finished difference Result 9059 states and 13405 transitions. [2022-11-03 01:41:30,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:41:30,262 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, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 121 [2022-11-03 01:41:30,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:41:30,289 INFO L225 Difference]: With dead ends: 9059 [2022-11-03 01:41:30,290 INFO L226 Difference]: Without dead ends: 6999 [2022-11-03 01:41:30,298 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:41:30,299 INFO L413 NwaCegarLoop]: 3254 mSDtfsCounter, 75 mSDsluCounter, 3414 mSDsCounter, 0 mSdLazyCounter, 491 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 6436 SdHoareTripleChecker+Invalid, 491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 01:41:30,300 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 6436 Invalid, 491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 491 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 01:41:30,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6999 states. [2022-11-03 01:41:30,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6999 to 6309. [2022-11-03 01:41:30,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6309 states, 5501 states have (on average 1.580985275404472) internal successors, (8697), 5521 states have internal predecessors, (8697), 486 states have call successors, (486), 321 states have call predecessors, (486), 320 states have return successors, (484), 467 states have call predecessors, (484), 484 states have call successors, (484) [2022-11-03 01:41:30,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6309 states to 6309 states and 9667 transitions. [2022-11-03 01:41:30,705 INFO L78 Accepts]: Start accepts. Automaton has 6309 states and 9667 transitions. Word has length 121 [2022-11-03 01:41:30,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:41:30,705 INFO L495 AbstractCegarLoop]: Abstraction has 6309 states and 9667 transitions. [2022-11-03 01:41:30,706 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, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-03 01:41:30,706 INFO L276 IsEmpty]: Start isEmpty. Operand 6309 states and 9667 transitions. [2022-11-03 01:41:30,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-11-03 01:41:30,720 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:41:30,720 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:41:30,759 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a4f791b-7292-41e4-8317-5e22d48adf94/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-03 01:41:30,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a4f791b-7292-41e4-8317-5e22d48adf94/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-03 01:41:30,934 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:41:30,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:41:30,935 INFO L85 PathProgramCache]: Analyzing trace with hash -791980935, now seen corresponding path program 1 times [2022-11-03 01:41:30,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:41:30,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855150067] [2022-11-03 01:41:30,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:41:30,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:41:30,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:41:31,054 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 20 proven. 4 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-11-03 01:41:31,054 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:41:31,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855150067] [2022-11-03 01:41:31,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855150067] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:41:31,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424002801] [2022-11-03 01:41:31,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:41:31,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:41:31,055 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a4f791b-7292-41e4-8317-5e22d48adf94/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:41:31,056 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a4f791b-7292-41e4-8317-5e22d48adf94/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:41:31,078 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a4f791b-7292-41e4-8317-5e22d48adf94/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-03 01:41:31,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:41:31,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 640 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 01:41:31,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:41:31,250 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-03 01:41:31,250 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:41:31,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1424002801] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:41:31,251 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 01:41:31,251 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-03 01:41:31,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623984615] [2022-11-03 01:41:31,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:41:31,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:41:31,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:41:31,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:41:31,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:41:31,254 INFO L87 Difference]: Start difference. First operand 6309 states and 9667 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, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-03 01:41:32,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:41:32,249 INFO L93 Difference]: Finished difference Result 10563 states and 15661 transitions. [2022-11-03 01:41:32,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:41:32,250 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, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 121 [2022-11-03 01:41:32,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:41:32,290 INFO L225 Difference]: With dead ends: 10563 [2022-11-03 01:41:32,290 INFO L226 Difference]: Without dead ends: 8151 [2022-11-03 01:41:32,299 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:41:32,300 INFO L413 NwaCegarLoop]: 3264 mSDtfsCounter, 87 mSDsluCounter, 3414 mSDsCounter, 0 mSdLazyCounter, 493 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 6446 SdHoareTripleChecker+Invalid, 493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 493 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 01:41:32,300 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 6446 Invalid, 493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 493 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 01:41:32,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8151 states. [2022-11-03 01:41:32,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8151 to 7237. [2022-11-03 01:41:32,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7237 states, 6333 states have (on average 1.579188378335702) internal successors, (10001), 6353 states have internal predecessors, (10001), 534 states have call successors, (534), 369 states have call predecessors, (534), 368 states have return successors, (532), 515 states have call predecessors, (532), 532 states have call successors, (532) [2022-11-03 01:41:32,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7237 states to 7237 states and 11067 transitions. [2022-11-03 01:41:32,855 INFO L78 Accepts]: Start accepts. Automaton has 7237 states and 11067 transitions. Word has length 121 [2022-11-03 01:41:32,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:41:32,856 INFO L495 AbstractCegarLoop]: Abstraction has 7237 states and 11067 transitions. [2022-11-03 01:41:32,856 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, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-03 01:41:32,856 INFO L276 IsEmpty]: Start isEmpty. Operand 7237 states and 11067 transitions. [2022-11-03 01:41:32,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-11-03 01:41:32,876 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:41:32,877 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] [2022-11-03 01:41:32,919 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a4f791b-7292-41e4-8317-5e22d48adf94/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-03 01:41:33,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a4f791b-7292-41e4-8317-5e22d48adf94/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-03 01:41:33,094 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:41:33,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:41:33,095 INFO L85 PathProgramCache]: Analyzing trace with hash 2091576659, now seen corresponding path program 1 times [2022-11-03 01:41:33,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:41:33,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035069648] [2022-11-03 01:41:33,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:41:33,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:41:33,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:41:33,251 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 21 proven. 3 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-11-03 01:41:33,251 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:41:33,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035069648] [2022-11-03 01:41:33,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035069648] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:41:33,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567230155] [2022-11-03 01:41:33,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:41:33,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:41:33,253 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a4f791b-7292-41e4-8317-5e22d48adf94/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:41:33,254 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a4f791b-7292-41e4-8317-5e22d48adf94/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:41:33,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a4f791b-7292-41e4-8317-5e22d48adf94/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-03 01:41:33,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:41:33,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 643 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-03 01:41:33,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:41:33,467 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-03 01:41:33,467 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:41:33,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [567230155] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:41:33,468 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 01:41:33,468 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-03 01:41:33,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644958452] [2022-11-03 01:41:33,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:41:33,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:41:33,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:41:33,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:41:33,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:41:33,471 INFO L87 Difference]: Start difference. First operand 7237 states and 11067 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, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-03 01:41:34,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:41:34,557 INFO L93 Difference]: Finished difference Result 12187 states and 18101 transitions. [2022-11-03 01:41:34,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:41:34,557 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, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 121 [2022-11-03 01:41:34,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:41:34,592 INFO L225 Difference]: With dead ends: 12187 [2022-11-03 01:41:34,593 INFO L226 Difference]: Without dead ends: 9323 [2022-11-03 01:41:34,604 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:41:34,605 INFO L413 NwaCegarLoop]: 3259 mSDtfsCounter, 81 mSDsluCounter, 3414 mSDsCounter, 0 mSdLazyCounter, 492 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 6441 SdHoareTripleChecker+Invalid, 492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 01:41:34,605 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 6441 Invalid, 492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 492 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 01:41:34,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9323 states. [2022-11-03 01:41:35,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9323 to 8521. [2022-11-03 01:41:35,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8521 states, 7473 states have (on average 1.5711227084169677) internal successors, (11741), 7493 states have internal predecessors, (11741), 606 states have call successors, (606), 441 states have call predecessors, (606), 440 states have return successors, (604), 587 states have call predecessors, (604), 604 states have call successors, (604) [2022-11-03 01:41:35,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8521 states to 8521 states and 12951 transitions. [2022-11-03 01:41:35,202 INFO L78 Accepts]: Start accepts. Automaton has 8521 states and 12951 transitions. Word has length 121 [2022-11-03 01:41:35,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:41:35,203 INFO L495 AbstractCegarLoop]: Abstraction has 8521 states and 12951 transitions. [2022-11-03 01:41:35,203 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, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-03 01:41:35,203 INFO L276 IsEmpty]: Start isEmpty. Operand 8521 states and 12951 transitions. [2022-11-03 01:41:35,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-11-03 01:41:35,230 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:41:35,231 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, 1] [2022-11-03 01:41:35,269 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a4f791b-7292-41e4-8317-5e22d48adf94/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-03 01:41:35,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a4f791b-7292-41e4-8317-5e22d48adf94/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:41:35,446 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:41:35,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:41:35,447 INFO L85 PathProgramCache]: Analyzing trace with hash 2116324679, now seen corresponding path program 1 times [2022-11-03 01:41:35,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:41:35,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914329157] [2022-11-03 01:41:35,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:41:35,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:41:35,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:41:35,775 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 14 proven. 32 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-03 01:41:35,775 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:41:35,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914329157] [2022-11-03 01:41:35,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914329157] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:41:35,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323305622] [2022-11-03 01:41:35,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:41:35,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:41:35,777 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a4f791b-7292-41e4-8317-5e22d48adf94/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:41:35,779 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a4f791b-7292-41e4-8317-5e22d48adf94/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:41:35,802 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a4f791b-7292-41e4-8317-5e22d48adf94/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-03 01:41:35,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:41:35,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 666 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 01:41:35,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:41:36,019 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 78 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-03 01:41:36,019 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:41:36,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1323305622] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:41:36,020 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 01:41:36,020 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-03 01:41:36,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944113102] [2022-11-03 01:41:36,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:41:36,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:41:36,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:41:36,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:41:36,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-03 01:41:36,023 INFO L87 Difference]: Start difference. First operand 8521 states and 12951 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, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-03 01:41:37,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:41:37,001 INFO L93 Difference]: Finished difference Result 12737 states and 19109 transitions. [2022-11-03 01:41:37,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:41:37,002 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, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 126 [2022-11-03 01:41:37,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:41:37,029 INFO L225 Difference]: With dead ends: 12737 [2022-11-03 01:41:37,030 INFO L226 Difference]: Without dead ends: 8541 [2022-11-03 01:41:37,040 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 [2022-11-03 01:41:37,041 INFO L413 NwaCegarLoop]: 3270 mSDtfsCounter, 109 mSDsluCounter, 3403 mSDsCounter, 0 mSdLazyCounter, 496 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 6439 SdHoareTripleChecker+Invalid, 498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 01:41:37,042 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 6439 Invalid, 498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 496 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 01:41:37,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8541 states. [2022-11-03 01:41:37,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8541 to 8409. [2022-11-03 01:41:37,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8409 states, 7361 states have (on average 1.5559027306072544) internal successors, (11453), 7381 states have internal predecessors, (11453), 606 states have call successors, (606), 441 states have call predecessors, (606), 440 states have return successors, (604), 587 states have call predecessors, (604), 604 states have call successors, (604) [2022-11-03 01:41:37,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8409 states to 8409 states and 12663 transitions. [2022-11-03 01:41:37,520 INFO L78 Accepts]: Start accepts. Automaton has 8409 states and 12663 transitions. Word has length 126 [2022-11-03 01:41:37,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:41:37,521 INFO L495 AbstractCegarLoop]: Abstraction has 8409 states and 12663 transitions. [2022-11-03 01:41:37,521 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, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-03 01:41:37,521 INFO L276 IsEmpty]: Start isEmpty. Operand 8409 states and 12663 transitions. [2022-11-03 01:41:37,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-11-03 01:41:37,536 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:41:37,537 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, 1] [2022-11-03 01:41:37,572 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a4f791b-7292-41e4-8317-5e22d48adf94/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-03 01:41:37,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a4f791b-7292-41e4-8317-5e22d48adf94/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:41:37,754 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:41:37,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:41:37,754 INFO L85 PathProgramCache]: Analyzing trace with hash -503585433, now seen corresponding path program 1 times [2022-11-03 01:41:37,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:41:37,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416280107] [2022-11-03 01:41:37,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:41:37,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:41:37,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:41:37,998 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 14 proven. 30 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-03 01:41:37,998 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:41:37,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416280107] [2022-11-03 01:41:37,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416280107] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:41:37,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880677185] [2022-11-03 01:41:37,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:41:37,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:41:38,000 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a4f791b-7292-41e4-8317-5e22d48adf94/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:41:38,001 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a4f791b-7292-41e4-8317-5e22d48adf94/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:41:38,022 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a4f791b-7292-41e4-8317-5e22d48adf94/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-03 01:41:38,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:41:38,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 672 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 01:41:38,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:41:38,261 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-03 01:41:38,261 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:41:38,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [880677185] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:41:38,262 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 01:41:38,262 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2022-11-03 01:41:38,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375164707] [2022-11-03 01:41:38,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:41:38,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 01:41:38,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:41:38,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 01:41:38,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-03 01:41:38,265 INFO L87 Difference]: Start difference. First operand 8409 states and 12663 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, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-03 01:41:39,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:41:39,509 INFO L93 Difference]: Finished difference Result 21647 states and 30987 transitions. [2022-11-03 01:41:39,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 01:41:39,510 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, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) Word has length 126 [2022-11-03 01:41:39,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:41:39,559 INFO L225 Difference]: With dead ends: 21647 [2022-11-03 01:41:39,560 INFO L226 Difference]: Without dead ends: 14885 [2022-11-03 01:41:39,577 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-11-03 01:41:39,578 INFO L413 NwaCegarLoop]: 3299 mSDtfsCounter, 3401 mSDsluCounter, 3668 mSDsCounter, 0 mSdLazyCounter, 548 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3401 SdHoareTripleChecker+Valid, 6696 SdHoareTripleChecker+Invalid, 551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 548 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 01:41:39,578 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3401 Valid, 6696 Invalid, 551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 548 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 01:41:39,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14885 states. [2022-11-03 01:41:40,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14885 to 14861. [2022-11-03 01:41:40,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14861 states, 12779 states have (on average 1.482353861804523) internal successors, (18943), 12832 states have internal predecessors, (18943), 1187 states have call successors, (1187), 878 states have call predecessors, (1187), 893 states have return successors, (1233), 1151 states have call predecessors, (1233), 1185 states have call successors, (1233) [2022-11-03 01:41:40,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14861 states to 14861 states and 21363 transitions. [2022-11-03 01:41:40,327 INFO L78 Accepts]: Start accepts. Automaton has 14861 states and 21363 transitions. Word has length 126 [2022-11-03 01:41:40,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:41:40,327 INFO L495 AbstractCegarLoop]: Abstraction has 14861 states and 21363 transitions. [2022-11-03 01:41:40,328 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, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-03 01:41:40,328 INFO L276 IsEmpty]: Start isEmpty. Operand 14861 states and 21363 transitions. [2022-11-03 01:41:40,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-11-03 01:41:40,359 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:41:40,359 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:41:40,401 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a4f791b-7292-41e4-8317-5e22d48adf94/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-03 01:41:40,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a4f791b-7292-41e4-8317-5e22d48adf94/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-03 01:41:40,582 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:41:40,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:41:40,583 INFO L85 PathProgramCache]: Analyzing trace with hash -454014684, now seen corresponding path program 1 times [2022-11-03 01:41:40,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:41:40,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232018709] [2022-11-03 01:41:40,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:41:40,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:41:40,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:41:40,812 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 13 proven. 31 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-11-03 01:41:40,812 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:41:40,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232018709] [2022-11-03 01:41:40,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232018709] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:41:40,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777775004] [2022-11-03 01:41:40,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:41:40,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:41:40,813 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a4f791b-7292-41e4-8317-5e22d48adf94/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:41:40,814 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a4f791b-7292-41e4-8317-5e22d48adf94/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:41:40,834 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a4f791b-7292-41e4-8317-5e22d48adf94/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-03 01:41:40,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:41:40,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 669 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 01:41:40,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:41:41,105 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-03 01:41:41,106 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:41:41,106 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [777775004] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:41:41,106 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 01:41:41,106 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 7 [2022-11-03 01:41:41,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706203736] [2022-11-03 01:41:41,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:41:41,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 01:41:41,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:41:41,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 01:41:41,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-03 01:41:41,109 INFO L87 Difference]: Start difference. First operand 14861 states and 21363 transitions. Second operand has 6 states, 6 states have (on average 13.0) internal successors, (78), 6 states have internal predecessors, (78), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-03 01:41:42,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:41:42,871 INFO L93 Difference]: Finished difference Result 25294 states and 35496 transitions. [2022-11-03 01:41:42,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 01:41:42,872 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.0) internal successors, (78), 6 states have internal predecessors, (78), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 126 [2022-11-03 01:41:42,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:41:42,911 INFO L225 Difference]: With dead ends: 25294 [2022-11-03 01:41:42,911 INFO L226 Difference]: Without dead ends: 12080 [2022-11-03 01:41:42,934 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 [2022-11-03 01:41:42,936 INFO L413 NwaCegarLoop]: 3193 mSDtfsCounter, 6940 mSDsluCounter, 6743 mSDsCounter, 0 mSdLazyCounter, 778 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6953 SdHoareTripleChecker+Valid, 9477 SdHoareTripleChecker+Invalid, 902 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 778 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-03 01:41:42,936 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6953 Valid, 9477 Invalid, 902 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 778 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-03 01:41:42,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12080 states. [2022-11-03 01:41:43,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12080 to 11822. [2022-11-03 01:41:43,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11822 states, 10223 states have (on average 1.493984153379634) internal successors, (15273), 10267 states have internal predecessors, (15273), 903 states have call successors, (903), 663 states have call predecessors, (903), 694 states have return successors, (933), 892 states have call predecessors, (933), 901 states have call successors, (933) [2022-11-03 01:41:43,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11822 states to 11822 states and 17109 transitions. [2022-11-03 01:41:43,691 INFO L78 Accepts]: Start accepts. Automaton has 11822 states and 17109 transitions. Word has length 126 [2022-11-03 01:41:43,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:41:43,692 INFO L495 AbstractCegarLoop]: Abstraction has 11822 states and 17109 transitions. [2022-11-03 01:41:43,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.0) internal successors, (78), 6 states have internal predecessors, (78), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-03 01:41:43,692 INFO L276 IsEmpty]: Start isEmpty. Operand 11822 states and 17109 transitions. [2022-11-03 01:41:43,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-11-03 01:41:43,711 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:41:43,712 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, 1] [2022-11-03 01:41:43,754 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a4f791b-7292-41e4-8317-5e22d48adf94/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-03 01:41:43,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a4f791b-7292-41e4-8317-5e22d48adf94/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-03 01:41:43,930 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:41:43,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:41:43,931 INFO L85 PathProgramCache]: Analyzing trace with hash -824063284, now seen corresponding path program 2 times [2022-11-03 01:41:43,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:41:43,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642683365] [2022-11-03 01:41:43,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:41:43,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:41:43,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:41:44,187 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 14 proven. 31 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-11-03 01:41:44,188 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:41:44,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642683365] [2022-11-03 01:41:44,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642683365] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:41:44,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491845256] [2022-11-03 01:41:44,189 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 01:41:44,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:41:44,189 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a4f791b-7292-41e4-8317-5e22d48adf94/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:41:44,191 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a4f791b-7292-41e4-8317-5e22d48adf94/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:41:44,214 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a4f791b-7292-41e4-8317-5e22d48adf94/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-03 01:41:44,362 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-03 01:41:44,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 01:41:44,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 617 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 01:41:44,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:41:44,392 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-03 01:41:44,392 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:41:44,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [491845256] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:41:44,393 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 01:41:44,393 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-03 01:41:44,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262560838] [2022-11-03 01:41:44,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:41:44,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:41:44,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:41:44,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:41:44,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-03 01:41:44,395 INFO L87 Difference]: Start difference. First operand 11822 states and 17109 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), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-03 01:41:45,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:41:45,387 INFO L93 Difference]: Finished difference Result 15219 states and 21817 transitions. [2022-11-03 01:41:45,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:41:45,387 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), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 127 [2022-11-03 01:41:45,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:41:45,425 INFO L225 Difference]: With dead ends: 15219 [2022-11-03 01:41:45,425 INFO L226 Difference]: Without dead ends: 11542 [2022-11-03 01:41:45,437 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-03 01:41:45,438 INFO L413 NwaCegarLoop]: 3193 mSDtfsCounter, 28 mSDsluCounter, 3405 mSDsCounter, 0 mSdLazyCounter, 481 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 6366 SdHoareTripleChecker+Invalid, 481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 01:41:45,438 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 6366 Invalid, 481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 481 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 01:41:45,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11542 states. [2022-11-03 01:41:46,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11542 to 11102. [2022-11-03 01:41:46,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11102 states, 9599 states have (on average 1.5102614855714136) internal successors, (14497), 9619 states have internal predecessors, (14497), 871 states have call successors, (871), 631 states have call predecessors, (871), 630 states have return successors, (869), 852 states have call predecessors, (869), 869 states have call successors, (869) [2022-11-03 01:41:46,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11102 states to 11102 states and 16237 transitions. [2022-11-03 01:41:46,047 INFO L78 Accepts]: Start accepts. Automaton has 11102 states and 16237 transitions. Word has length 127 [2022-11-03 01:41:46,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:41:46,048 INFO L495 AbstractCegarLoop]: Abstraction has 11102 states and 16237 transitions. [2022-11-03 01:41:46,048 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), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-03 01:41:46,048 INFO L276 IsEmpty]: Start isEmpty. Operand 11102 states and 16237 transitions. [2022-11-03 01:41:46,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-11-03 01:41:46,070 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:41:46,071 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, 1] [2022-11-03 01:41:46,112 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a4f791b-7292-41e4-8317-5e22d48adf94/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-03 01:41:46,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a4f791b-7292-41e4-8317-5e22d48adf94/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:41:46,286 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:41:46,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:41:46,286 INFO L85 PathProgramCache]: Analyzing trace with hash 165202691, now seen corresponding path program 1 times [2022-11-03 01:41:46,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:41:46,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125234305] [2022-11-03 01:41:46,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:41:46,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:41:46,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:41:46,535 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 15 proven. 31 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-03 01:41:46,535 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:41:46,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125234305] [2022-11-03 01:41:46,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125234305] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:41:46,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640546458] [2022-11-03 01:41:46,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:41:46,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:41:46,537 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a4f791b-7292-41e4-8317-5e22d48adf94/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:41:46,538 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a4f791b-7292-41e4-8317-5e22d48adf94/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:41:46,558 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a4f791b-7292-41e4-8317-5e22d48adf94/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-03 01:41:46,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:41:46,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 676 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 01:41:46,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:41:46,801 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-03 01:41:46,801 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:41:46,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [640546458] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:41:46,802 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 01:41:46,802 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 7 [2022-11-03 01:41:46,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637671451] [2022-11-03 01:41:46,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:41:46,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 01:41:46,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:41:46,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 01:41:46,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-03 01:41:46,804 INFO L87 Difference]: Start difference. First operand 11102 states and 16237 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, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-03 01:41:48,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:41:48,411 INFO L93 Difference]: Finished difference Result 23938 states and 33719 transitions. [2022-11-03 01:41:48,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 01:41:48,412 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, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 127 [2022-11-03 01:41:48,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:41:48,460 INFO L225 Difference]: With dead ends: 23938 [2022-11-03 01:41:48,460 INFO L226 Difference]: Without dead ends: 14528 [2022-11-03 01:41:48,477 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-11-03 01:41:48,478 INFO L413 NwaCegarLoop]: 3181 mSDtfsCounter, 6986 mSDsluCounter, 6720 mSDsCounter, 0 mSdLazyCounter, 761 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6999 SdHoareTripleChecker+Valid, 9445 SdHoareTripleChecker+Invalid, 918 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 761 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-03 01:41:48,478 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6999 Valid, 9445 Invalid, 918 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 761 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-03 01:41:48,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14528 states. [2022-11-03 01:41:49,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14528 to 14524. [2022-11-03 01:41:49,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14524 states, 12405 states have (on average 1.4615880693268843) internal successors, (18131), 12433 states have internal predecessors, (18131), 1231 states have call successors, (1231), 887 states have call predecessors, (1231), 886 states have return successors, (1229), 1204 states have call predecessors, (1229), 1229 states have call successors, (1229) [2022-11-03 01:41:49,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14524 states to 14524 states and 20591 transitions. [2022-11-03 01:41:49,308 INFO L78 Accepts]: Start accepts. Automaton has 14524 states and 20591 transitions. Word has length 127 [2022-11-03 01:41:49,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:41:49,308 INFO L495 AbstractCegarLoop]: Abstraction has 14524 states and 20591 transitions. [2022-11-03 01:41:49,308 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, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-03 01:41:49,309 INFO L276 IsEmpty]: Start isEmpty. Operand 14524 states and 20591 transitions. [2022-11-03 01:41:49,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-11-03 01:41:49,332 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:41:49,332 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, 1] [2022-11-03 01:41:49,373 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a4f791b-7292-41e4-8317-5e22d48adf94/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-03 01:41:49,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a4f791b-7292-41e4-8317-5e22d48adf94/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-03 01:41:49,546 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:41:49,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:41:49,547 INFO L85 PathProgramCache]: Analyzing trace with hash -1031665887, now seen corresponding path program 1 times [2022-11-03 01:41:49,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:41:49,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43395277] [2022-11-03 01:41:49,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:41:49,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:41:49,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:41:49,772 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 17 proven. 31 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-03 01:41:49,773 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:41:49,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43395277] [2022-11-03 01:41:49,773 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43395277] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:41:49,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582410996] [2022-11-03 01:41:49,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:41:49,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:41:49,774 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a4f791b-7292-41e4-8317-5e22d48adf94/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:41:49,775 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a4f791b-7292-41e4-8317-5e22d48adf94/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:41:49,786 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a4f791b-7292-41e4-8317-5e22d48adf94/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-03 01:41:49,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:41:49,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 690 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 01:41:49,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:41:50,036 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-03 01:41:50,036 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:41:50,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582410996] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:41:50,039 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 01:41:50,039 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 7 [2022-11-03 01:41:50,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117065308] [2022-11-03 01:41:50,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:41:50,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 01:41:50,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:41:50,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 01:41:50,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-03 01:41:50,041 INFO L87 Difference]: Start difference. First operand 14524 states and 20591 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, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-03 01:41:52,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:41:52,172 INFO L93 Difference]: Finished difference Result 32104 states and 44079 transitions. [2022-11-03 01:41:52,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 01:41:52,172 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, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 129 [2022-11-03 01:41:52,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:41:52,252 INFO L225 Difference]: With dead ends: 32104 [2022-11-03 01:41:52,252 INFO L226 Difference]: Without dead ends: 19272 [2022-11-03 01:41:52,278 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-11-03 01:41:52,279 INFO L413 NwaCegarLoop]: 3187 mSDtfsCounter, 3638 mSDsluCounter, 6779 mSDsCounter, 0 mSdLazyCounter, 787 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3651 SdHoareTripleChecker+Valid, 9498 SdHoareTripleChecker+Invalid, 915 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 787 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-03 01:41:52,280 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3651 Valid, 9498 Invalid, 915 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 787 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-03 01:41:52,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19272 states. [2022-11-03 01:41:53,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19272 to 19268. [2022-11-03 01:41:53,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19268 states, 16271 states have (on average 1.4158318480732592) internal successors, (23037), 16311 states have internal predecessors, (23037), 1745 states have call successors, (1745), 1251 states have call predecessors, (1745), 1250 states have return successors, (1743), 1706 states have call predecessors, (1743), 1743 states have call successors, (1743) [2022-11-03 01:41:53,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19268 states to 19268 states and 26525 transitions. [2022-11-03 01:41:53,573 INFO L78 Accepts]: Start accepts. Automaton has 19268 states and 26525 transitions. Word has length 129 [2022-11-03 01:41:53,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:41:53,573 INFO L495 AbstractCegarLoop]: Abstraction has 19268 states and 26525 transitions. [2022-11-03 01:41:53,573 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, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-03 01:41:53,573 INFO L276 IsEmpty]: Start isEmpty. Operand 19268 states and 26525 transitions. [2022-11-03 01:41:53,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-11-03 01:41:53,603 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:41:53,603 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, 1] [2022-11-03 01:41:53,645 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a4f791b-7292-41e4-8317-5e22d48adf94/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-03 01:41:53,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a4f791b-7292-41e4-8317-5e22d48adf94/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-03 01:41:53,830 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:41:53,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:41:53,831 INFO L85 PathProgramCache]: Analyzing trace with hash 969360570, now seen corresponding path program 1 times [2022-11-03 01:41:53,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:41:53,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403288005] [2022-11-03 01:41:53,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:41:53,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:41:53,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:41:54,060 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 21 proven. 31 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-03 01:41:54,061 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:41:54,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403288005] [2022-11-03 01:41:54,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403288005] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:41:54,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528537576] [2022-11-03 01:41:54,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:41:54,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:41:54,062 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a4f791b-7292-41e4-8317-5e22d48adf94/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:41:54,063 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a4f791b-7292-41e4-8317-5e22d48adf94/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:41:54,086 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a4f791b-7292-41e4-8317-5e22d48adf94/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-03 01:41:54,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:41:54,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 690 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 01:41:54,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:41:54,344 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-03 01:41:54,345 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:41:54,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [528537576] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:41:54,345 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 01:41:54,345 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 7 [2022-11-03 01:41:54,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651655634] [2022-11-03 01:41:54,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:41:54,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 01:41:54,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:41:54,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 01:41:54,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-03 01:41:54,347 INFO L87 Difference]: Start difference. First operand 19268 states and 26525 transitions. Second operand has 6 states, 5 states have (on average 17.2) internal successors, (86), 6 states have internal predecessors, (86), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-03 01:41:56,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:41:56,703 INFO L93 Difference]: Finished difference Result 43593 states and 58531 transitions. [2022-11-03 01:41:56,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 01:41:56,703 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 17.2) internal successors, (86), 6 states have internal predecessors, (86), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 129 [2022-11-03 01:41:56,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:41:56,791 INFO L225 Difference]: With dead ends: 43593 [2022-11-03 01:41:56,792 INFO L226 Difference]: Without dead ends: 26017 [2022-11-03 01:41:56,957 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-11-03 01:41:56,958 INFO L413 NwaCegarLoop]: 3187 mSDtfsCounter, 3618 mSDsluCounter, 6787 mSDsCounter, 0 mSdLazyCounter, 804 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3631 SdHoareTripleChecker+Valid, 9505 SdHoareTripleChecker+Invalid, 913 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 804 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-03 01:41:56,958 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3631 Valid, 9505 Invalid, 913 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 804 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-03 01:41:56,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26017 states. [2022-11-03 01:41:58,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26017 to 26013. [2022-11-03 01:41:58,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26013 states, 21764 states have (on average 1.3780095570667157) internal successors, (29991), 21822 states have internal predecessors, (29991), 2479 states have call successors, (2479), 1769 states have call predecessors, (2479), 1768 states have return successors, (2477), 2422 states have call predecessors, (2477), 2477 states have call successors, (2477) [2022-11-03 01:41:58,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26013 states to 26013 states and 34947 transitions. [2022-11-03 01:41:58,831 INFO L78 Accepts]: Start accepts. Automaton has 26013 states and 34947 transitions. Word has length 129 [2022-11-03 01:41:58,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:41:58,831 INFO L495 AbstractCegarLoop]: Abstraction has 26013 states and 34947 transitions. [2022-11-03 01:41:58,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 17.2) internal successors, (86), 6 states have internal predecessors, (86), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-03 01:41:58,832 INFO L276 IsEmpty]: Start isEmpty. Operand 26013 states and 34947 transitions. [2022-11-03 01:41:58,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-11-03 01:41:58,867 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:41:58,867 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, 1] [2022-11-03 01:41:58,909 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a4f791b-7292-41e4-8317-5e22d48adf94/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-03 01:41:59,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a4f791b-7292-41e4-8317-5e22d48adf94/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:41:59,086 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:41:59,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:41:59,087 INFO L85 PathProgramCache]: Analyzing trace with hash 2109229699, now seen corresponding path program 1 times [2022-11-03 01:41:59,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:41:59,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760114047] [2022-11-03 01:41:59,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:41:59,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:41:59,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:41:59,308 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 37 proven. 13 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-03 01:41:59,308 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:41:59,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760114047] [2022-11-03 01:41:59,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760114047] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:41:59,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613933006] [2022-11-03 01:41:59,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:41:59,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:41:59,309 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a4f791b-7292-41e4-8317-5e22d48adf94/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:41:59,310 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a4f791b-7292-41e4-8317-5e22d48adf94/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:41:59,316 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a4f791b-7292-41e4-8317-5e22d48adf94/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-03 01:41:59,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:41:59,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 704 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 01:41:59,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:41:59,568 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-03 01:41:59,568 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:41:59,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [613933006] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:41:59,569 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 01:41:59,569 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 6 [2022-11-03 01:41:59,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278957859] [2022-11-03 01:41:59,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:41:59,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:41:59,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:41:59,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:41:59,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:41:59,571 INFO L87 Difference]: Start difference. First operand 26013 states and 34947 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, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-03 01:42:02,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:42:02,271 INFO L93 Difference]: Finished difference Result 46711 states and 62172 transitions. [2022-11-03 01:42:02,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:42:02,272 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, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 131 [2022-11-03 01:42:02,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:42:02,366 INFO L225 Difference]: With dead ends: 46711 [2022-11-03 01:42:02,366 INFO L226 Difference]: Without dead ends: 29571 [2022-11-03 01:42:02,397 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:42:02,398 INFO L413 NwaCegarLoop]: 3195 mSDtfsCounter, 3364 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3364 SdHoareTripleChecker+Valid, 3231 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 01:42:02,399 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3364 Valid, 3231 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 252 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 01:42:02,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29571 states. [2022-11-03 01:42:04,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29571 to 29303. [2022-11-03 01:42:04,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29303 states, 24815 states have (on average 1.349304855933911) internal successors, (33483), 24873 states have internal predecessors, (33483), 2517 states have call successors, (2517), 1970 states have call predecessors, (2517), 1969 states have return successors, (2687), 2460 states have call predecessors, (2687), 2515 states have call successors, (2687) [2022-11-03 01:42:04,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29303 states to 29303 states and 38687 transitions. [2022-11-03 01:42:04,652 INFO L78 Accepts]: Start accepts. Automaton has 29303 states and 38687 transitions. Word has length 131 [2022-11-03 01:42:04,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:42:04,653 INFO L495 AbstractCegarLoop]: Abstraction has 29303 states and 38687 transitions. [2022-11-03 01:42:04,653 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, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-03 01:42:04,653 INFO L276 IsEmpty]: Start isEmpty. Operand 29303 states and 38687 transitions. [2022-11-03 01:42:04,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-11-03 01:42:04,680 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:42:04,681 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, 1] [2022-11-03 01:42:04,702 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a4f791b-7292-41e4-8317-5e22d48adf94/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-11-03 01:42:04,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a4f791b-7292-41e4-8317-5e22d48adf94/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:42:04,881 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:42:04,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:42:04,882 INFO L85 PathProgramCache]: Analyzing trace with hash 492156519, now seen corresponding path program 1 times [2022-11-03 01:42:04,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:42:04,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771508319] [2022-11-03 01:42:04,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:42:04,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:42:04,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:42:05,104 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 46 proven. 20 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-03 01:42:05,104 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:42:05,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771508319] [2022-11-03 01:42:05,104 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771508319] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:42:05,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165992426] [2022-11-03 01:42:05,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:42:05,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:42:05,105 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a4f791b-7292-41e4-8317-5e22d48adf94/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:42:05,118 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a4f791b-7292-41e4-8317-5e22d48adf94/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:42:05,134 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a4f791b-7292-41e4-8317-5e22d48adf94/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-03 01:42:05,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:42:05,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 702 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-03 01:42:05,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:42:05,379 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 88 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:42:05,379 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:42:05,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165992426] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:42:05,379 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 01:42:05,379 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 6 [2022-11-03 01:42:05,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310662712] [2022-11-03 01:42:05,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:42:05,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 01:42:05,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:42:05,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 01:42:05,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:42:05,381 INFO L87 Difference]: Start difference. First operand 29303 states and 38687 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, (12), 5 states have call predecessors, (12), 5 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2022-11-03 01:42:09,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:42:09,300 INFO L93 Difference]: Finished difference Result 56407 states and 73747 transitions. [2022-11-03 01:42:09,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 01:42:09,301 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, (12), 5 states have call predecessors, (12), 5 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) Word has length 133 [2022-11-03 01:42:09,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:42:09,399 INFO L225 Difference]: With dead ends: 56407 [2022-11-03 01:42:09,399 INFO L226 Difference]: Without dead ends: 37077 [2022-11-03 01:42:09,428 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-11-03 01:42:09,429 INFO L413 NwaCegarLoop]: 3265 mSDtfsCounter, 235 mSDsluCounter, 10100 mSDsCounter, 0 mSdLazyCounter, 1085 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 12679 SdHoareTripleChecker+Invalid, 1147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 1085 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-03 01:42:09,429 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [251 Valid, 12679 Invalid, 1147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 1085 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-03 01:42:09,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37077 states. [2022-11-03 01:42:12,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37077 to 34659. [2022-11-03 01:42:12,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34659 states, 29185 states have (on average 1.3298954942607504) internal successors, (38813), 29207 states have internal predecessors, (38813), 3123 states have call successors, (3123), 2414 states have call predecessors, (3123), 2349 states have return successors, (3383), 3038 states have call predecessors, (3383), 3121 states have call successors, (3383) [2022-11-03 01:42:12,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34659 states to 34659 states and 45319 transitions. [2022-11-03 01:42:12,741 INFO L78 Accepts]: Start accepts. Automaton has 34659 states and 45319 transitions. Word has length 133 [2022-11-03 01:42:12,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:42:12,742 INFO L495 AbstractCegarLoop]: Abstraction has 34659 states and 45319 transitions. [2022-11-03 01:42:12,742 INFO L496 AbstractCegarLoop]: INTERPOLANT 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, (12), 5 states have call predecessors, (12), 5 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2022-11-03 01:42:12,742 INFO L276 IsEmpty]: Start isEmpty. Operand 34659 states and 45319 transitions. [2022-11-03 01:42:12,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-11-03 01:42:12,774 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:42:12,775 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, 1] [2022-11-03 01:42:12,796 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a4f791b-7292-41e4-8317-5e22d48adf94/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-03 01:42:12,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a4f791b-7292-41e4-8317-5e22d48adf94/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-11-03 01:42:12,975 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:42:12,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:42:12,976 INFO L85 PathProgramCache]: Analyzing trace with hash -1688923616, now seen corresponding path program 1 times [2022-11-03 01:42:12,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:42:12,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608834425] [2022-11-03 01:42:12,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:42:12,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:42:12,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:42:13,132 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 41 proven. 15 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-11-03 01:42:13,132 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:42:13,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608834425] [2022-11-03 01:42:13,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608834425] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:42:13,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466535848] [2022-11-03 01:42:13,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:42:13,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:42:13,133 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a4f791b-7292-41e4-8317-5e22d48adf94/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:42:13,134 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a4f791b-7292-41e4-8317-5e22d48adf94/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:42:13,137 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a4f791b-7292-41e4-8317-5e22d48adf94/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-03 01:42:13,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:42:13,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 704 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-03 01:42:13,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:42:13,358 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-03 01:42:13,358 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:42:13,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [466535848] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:42:13,358 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 01:42:13,358 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 6 [2022-11-03 01:42:13,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787709245] [2022-11-03 01:42:13,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:42:13,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:42:13,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:42:13,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:42:13,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 01:42:13,360 INFO L87 Difference]: Start difference. First operand 34659 states and 45319 transitions. Second operand has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10)